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https://www.readbyqxmd.com/read/28731751/inferences-about-supernova-physics-from-gravitational-wave-measurements-gw151226-spin-misalignment-as-an-indicator-of-strong-black-hole-natal-kicks
#1
Richard O'Shaughnessy, Davide Gerosa, Daniel Wysocki
The inferred parameters of the binary black hole GW151226 are consistent with nonzero spin for the most massive black hole, misaligned from the binary's orbital angular momentum. If the black holes formed through isolated binary evolution from an initially aligned binary star, this misalignment would then arise from a natal kick imparted to the first-born black hole at its birth during stellar collapse. We use simple kinematic arguments to constrain the characteristic magnitude of this kick, and find that a natal kick v_{k}≳50  km/s must be imparted to the black hole at birth to produce misalignments consistent with GW151226...
July 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28701501/blood-pressure-reduction-and-noncontrast-ct-markers-of-intracerebral-hemorrhage-expansion
#2
Andrea Morotti, Gregoire Boulouis, Javier M Romero, H Bart Brouwers, Michael J Jessel, Anastasia Vashkevich, Kristin Schwab, Mohammad Rauf Afzal, Christy Cassarly, Steven M Greenberg, Reneé Hebert Martin, Adnan I Qureshi, Jonathan Rosand, Joshua N Goldstein
OBJECTIVE: To validate various noncontrast CT (NCCT) predictors of hematoma expansion in a large international cohort of ICH patients and investigate whether intensive blood pressure (BP) treatment reduces ICH growth and improves outcome in patients with these markers. METHODS: We analyzed patients enrolled in the Antihypertensive Treatment of Acute Cerebral Hemorrhage II (ATACH-II) randomized controlled trial. Participants were assigned to intensive (systolic BP <140 mm Hg) vs standard (systolic BP <180 mm Hg) treatment within 4...
July 12, 2017: Neurology
https://www.readbyqxmd.com/read/28696338/black-holes-in-loop-quantum-gravity
#3
Alejandro Perez
This is a review of the results on black hole physics in the framework of loop quantum gravity. The key feature underlying the results is the discreteness of geometric quantities at the Planck scale predicted by this approach to quantum gravity. Quantum discreteness follows directly from the canonical quantization prescription when applied to the action of general relativity that is suitable for the coupling of gravity with gauge fields and specially with fermions. Planckian discreteness and causal considerations provide the basic structure for the understanding of the thermal properties of black holes close to equilibrium...
July 11, 2017: Reports on Progress in Physics
https://www.readbyqxmd.com/read/28693764/black-hole
#4
Karen Greenbaum-Maya
No abstract text is available yet for this article.
July 2017: Chest
https://www.readbyqxmd.com/read/28690421/the-kerr-cft-correspondence-and-its-extensions
#5
REVIEW
Geoffrey Compère
We present a first-principles derivation of the main results of the Kerr/CFT correspondence and its extensions using only tools from gravity and quantum field theory. Firstly, we review properties of extremal black holes with in particular the construction of an asymptotic Virasoro symmetry in the near-horizon limit. The entropy of extremal spinning or charged black holes is shown to match with a chiral half of Cardy's formula. Secondly, we show how a thermal 2-dimensional conformal field theory (CFT) is relevant to reproduce the dynamics of near-superradiant probes around near-extremal black holes in the semi-classical limit...
2017: Living Reviews in Relativity
https://www.readbyqxmd.com/read/28685353/peginterferon-beta-1a-reduces-the-evolution-of-mri-lesions-to-black-holes-in-patients-with-rrms-a-post-hoc-analysis-from-the-advance-study
#6
Douglas L Arnold, Xiaojun You, Carmen Castrillo-Viguera
The presence of chronic black holes, i.e., chronic lesions that are hypointense on T1-weighted images and are indicative of more severe tissue injury, has been increasingly utilized as a surrogate marker of therapeutic outcome in multiple sclerosis. The ADVANCE study was a 2-year, double-blind, pivotal trial evaluating the safety and efficacy of subcutaneous peginterferon beta-1a 125 mcg in 1512 patients with relapsing-remitting multiple sclerosis (RRMS). This report describes the correlation of clinical outcomes with the evolution of acute lesions into chronic black holes in ADVANCE, and the efficacy of peginterferon beta-1a in reducing this evolution...
July 7, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28667692/hybrid-tio2-ruthenium-nano-photosensitizer-synergistically-produces-reactive-oxygen-species-in-both-hypoxic-and-normoxic-conditions
#7
Rebecca Gilson, Kvar Black, Daniel D Lane, Samuel Achilefu
Photodynamic therapy (PDT) is widely used to treat diverse diseases, but its dependence on oxygen to produce cytotoxic reactive oxygen species (ROS) diminishes the therapeutic effect in a hypoxic environment such as solid tumors. Here, we developed a ROS-producing hybrid nanoparticle-based photosensitizer capable of maintaining high levels of ROS under both normoxic and hypoxic conditions. Conjugation of an organometallic ruthenium complex (N3) to a TiO2 nanoparticle afforded TiO2-N3. Upon exposure of TiO2-N3 to light, the N3 injected electrons into TiO2 to produce three- and four-fold greater hydroxyl radicals and hydrogen peroxide, respectively, than TiO2 at 160 mmHg...
July 1, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28666086/periodic-arrays-of-phosphorene-nanopores-as-antidot-lattices-with-tunable-properties
#8
Andrew Cupo, Paul Masih Das, Chen-Chi Chien, Gopinath Danda, Neerav Kharche, Damien Tristant, Marija Drndić, Vincent Meunier
A tunable band gap in phosphorene extends its applicability in nanoelectronic and optoelectronic applications. Here, we propose to tune the band gap in phosphorene by patterning antidot lattices, which are periodic arrays of holes or nanopores etched in the material, and by exploiting quantum confinement in the corresponding nanoconstrictions. We fabricated antidot lattices with radii down to 13 nm in few-layer black phosphorus flakes protected by an oxide layer and observed suppression of the in-plane phonon modes relative to the unmodified material via Raman spectroscopy...
July 7, 2017: ACS Nano
https://www.readbyqxmd.com/read/28665632/searching-for-primordial-black-holes-in-the-radio-and-x-ray-sky
#9
Daniele Gaggero, Gianfranco Bertone, Francesca Calore, Riley M T Connors, Mark Lovell, Sera Markoff, Emma Storm
We model the accretion of gas onto a population of massive primordial black holes in the Milky Way and compare the predicted radio and x-ray emission with observational data. We show that, under conservative assumptions on the accretion process, the possibility that O(10)M_{⊙} primordial black holes can account for all of the dark matter in the Milky Way is excluded at 5σ by a comparison with a Very Large Array radio catalog at 1.4 GHz and at ≃40σ by a comparison with a Chandra x-ray catalog (0.5-8 keV)...
June 16, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28654244/monolithically-integrated-flexible-black-phosphorus-complementary-inverter-circuits
#10
Yuanda Liu, Kah-Wee Ang
Two-dimensional (2D) inverter is a fundamental building block for flexible logic circuit which has previously been realized by heterogeneously wiring transistors with two discrete channel materials. Here, we demonstrate a monolithically integrated complementary inverter made using a homogenous black phosphorus (BP) nanosheet on flexible substrates. The digital logic inverter circuit is demonstrated via effective threshold voltage tuning within a single BP material, which offers both electron and hole dominated conducting channels with nearly symmetric pinch-off and current saturation...
June 27, 2017: ACS Nano
https://www.readbyqxmd.com/read/28638101/naked-singularity-firewall-and-hawking-radiation
#11
Hongsheng Zhang
Spacetime singularity has always been of interest since the proof of the Penrose-Hawking singularity theorem. Naked singularity naturally emerges from reasonable initial conditions in the collapsing process. A recent interesting approach in black hole information problem implies that we need a firewall to break the surplus entanglements among the Hawking photons. Classically, the firewall becomes a naked singularity. We find some vacuum analytical solutions in R (n) -gravity of the firewall-type and use these solutions as concrete models to study the naked singularities...
June 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28632223/black-holes-from-the-beginning-of-time
#12
Juan García-Bellido, Sébastien Clesse
No abstract text is available yet for this article.
June 20, 2017: Scientific American
https://www.readbyqxmd.com/read/28631485/suppression-of-magnetoresistance-in-thin-wte2-flakes-by-surface-oxidation
#13
John M Woods, Jie Shen, Piranavan Kumaravadivel, Yuan Pang, Yujun Xie, Grace A Pan, Min Li, Eric I Altman, Li Lu, Judy J Cha
Recent renewed interest in layered transition metal dichalcogenides stems from the exotic electronic phases predicted and observed in the single- and few-layer limit. Realizing these electronic phases requires preserving the desired transport properties down to a monolayer, which is challenging. Surface oxides are known to impart Fermi level pinning or degrade the mobility on a number of different systems, including transition metal dichalcogenides and black phosphorus. Semimetallic WTe2 exhibits large magnetoresistance due to electron-hole compensation; thus, Fermi level pinning in thin WTe2 flakes could break the electron-hole balance and suppress the large magnetoresistance...
July 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28627894/surface-functionalization-of-black-phosphorus-via-potassium-toward-high-performance-complementary-devices
#14
Cheng Han, Zehua Hu, Lidia C Gomes, Yang Bao, Alexandra Carvalho, Sherman J R Tan, Bo Lei, Du Xiang, Jing Wu, Dianyu Qi, Li Wang, Fengwei Huo, Wei Huang, Kian Ping Loh, Wei Chen
Two-dimensional black phosphorus configured field-effect transistor devices generally show a hole-dominated ambipolar transport characteristic, thereby limiting its applications in complementary electronics. Herein, we demonstrate an effective surface functionalization scheme on few-layer black phosphorus, through in situ surface modification with potassium, with a view toward high performance complementary device applications. Potassium induces a giant electron doping effect on black phosphorus along with a clear bandgap reduction, which is further corroborated by in situ photoelectron spectroscopy characterizations...
June 22, 2017: Nano Letters
https://www.readbyqxmd.com/read/28621973/gw170104-observation-of-a-50-solar-mass-binary-black-hole-coalescence-at-redshift-0-2
#15
B P Abbott, R Abbott, T D Abbott, F Acernese, K Ackley, C Adams, T Adams, P Addesso, R X Adhikari, V B Adya, C Affeldt, M Afrough, B Agarwal, M Agathos, K Agatsuma, N Aggarwal, O D Aguiar, L Aiello, A Ain, P Ajith, B Allen, G Allen, A Allocca, P A Altin, A Amato, A Ananyeva, S B Anderson, W G Anderson, S Antier, S Appert, K Arai, M C Araya, J S Areeda, N Arnaud, K G Arun, S Ascenzi, G Ashton, M Ast, S M Aston, P Astone, P Aufmuth, C Aulbert, K AultONeal, A Avila-Alvarez, S Babak, P Bacon, M K M Bader, S Bae, P T Baker, F Baldaccini, G Ballardin, S W Ballmer, S Banagiri, J C Barayoga, S E Barclay, B C Barish, D Barker, F Barone, B Barr, L Barsotti, M Barsuglia, D Barta, J Bartlett, I Bartos, R Bassiri, A Basti, J C Batch, C Baune, M Bawaj, M Bazzan, B Bécsy, C Beer, M Bejger, I Belahcene, A S Bell, B K Berger, G Bergmann, C P L Berry, D Bersanetti, A Bertolini, J Betzwieser, S Bhagwat, R Bhandare, I A Bilenko, G Billingsley, C R Billman, J Birch, R Birney, O Birnholtz, S Biscans, A Bisht, M Bitossi, C Biwer, M A Bizouard, J K Blackburn, J Blackman, C D Blair, D G Blair, R M Blair, S Bloemen, O Bock, N Bode, M Boer, G Bogaert, A Bohe, F Bondu, R Bonnand, B A Boom, R Bork, V Boschi, S Bose, Y Bouffanais, A Bozzi, C Bradaschia, P R Brady, V B Braginsky, M Branchesi, J E Brau, T Briant, A Brillet, M Brinkmann, V Brisson, P Brockill, J E Broida, A F Brooks, D A Brown, D D Brown, N M Brown, S Brunett, C C Buchanan, A Buikema, T Bulik, H J Bulten, A Buonanno, D Buskulic, C Buy, R L Byer, M Cabero, L Cadonati, G Cagnoli, C Cahillane, J Calderón Bustillo, T A Callister, E Calloni, J B Camp, M Canepa, P Canizares, K C Cannon, H Cao, J Cao, C D Capano, E Capocasa, F Carbognani, S Caride, M F Carney, J Casanueva Diaz, C Casentini, S Caudill, M Cavaglià, F Cavalier, R Cavalieri, G Cella, C B Cepeda, L Cerboni Baiardi, G Cerretani, E Cesarini, S J Chamberlin, M Chan, S Chao, P Charlton, E Chassande-Mottin, D Chatterjee, K Chatziioannou, B D Cheeseboro, H Y Chen, Y Chen, H-P Cheng, A Chincarini, A Chiummo, T Chmiel, H S Cho, M Cho, J H Chow, N Christensen, Q Chu, A J K Chua, S Chua, A K W Chung, S Chung, G Ciani, R Ciolfi, C E Cirelli, A Cirone, F Clara, J A Clark, F Cleva, C Cocchieri, E Coccia, P-F Cohadon, A Colla, C G Collette, L R Cominsky, M Constancio, L Conti, S J Cooper, P Corban, T R Corbitt, K R Corley, N Cornish, A Corsi, S Cortese, C A Costa, M W Coughlin, S B Coughlin, J-P Coulon, S T Countryman, P Couvares, P B Covas, E E Cowan, D M Coward, M J Cowart, D C Coyne, R Coyne, J D E Creighton, T D Creighton, J Cripe, S G Crowder, T J Cullen, A Cumming, L Cunningham, E Cuoco, T Dal Canton, S L Danilishin, S D'Antonio, K Danzmann, A Dasgupta, C F Da Silva Costa, V Dattilo, I Dave, M Davier, D Davis, E J Daw, B Day, S De, D DeBra, E Deelman, J Degallaix, M De Laurentis, S Deléglise, W Del Pozzo, T Denker, T Dent, V Dergachev, R De Rosa, R T DeRosa, R DeSalvo, J Devenson, R C Devine, S Dhurandhar, M C Díaz, L Di Fiore, M Di Giovanni, T Di Girolamo, A Di Lieto, S Di Pace, I Di Palma, F Di Renzo, Z Doctor, V Dolique, F Donovan, K L Dooley, S Doravari, I Dorrington, R Douglas, M Dovale Álvarez, T P Downes, M Drago, R W P Drever, J C Driggers, Z Du, M Ducrot, J Duncan, S E Dwyer, T B Edo, M C Edwards, A Effler, H-B Eggenstein, P Ehrens, J Eichholz, S S Eikenberry, R A Eisenstein, R C Essick, Z B Etienne, T Etzel, M Evans, T M Evans, M Factourovich, V Fafone, H Fair, S Fairhurst, X Fan, S Farinon, B Farr, W M Farr, E J Fauchon-Jones, M Favata, M Fays, H Fehrmann, J Feicht, M M Fejer, A Fernandez-Galiana, I Ferrante, E C Ferreira, F Ferrini, F Fidecaro, I Fiori, D Fiorucci, R P Fisher, R Flaminio, M Fletcher, H Fong, P W F Forsyth, S S Forsyth, J-D Fournier, S Frasca, F Frasconi, Z Frei, A Freise, R Frey, V Frey, E M Fries, P Fritschel, V V Frolov, P Fulda, M Fyffe, H Gabbard, M Gabel, B U Gadre, S M Gaebel, J R Gair, L Gammaitoni, M R Ganija, S G Gaonkar, F Garufi, S Gaudio, G Gaur, V Gayathri, N Gehrels, G Gemme, E Genin, A Gennai, D George, J George, L Gergely, V Germain, S Ghonge, Abhirup Ghosh, Archisman Ghosh, S Ghosh, J A Giaime, K D Giardina, A Giazotto, K Gill, L Glover, E Goetz, R Goetz, S Gomes, G González, J M Gonzalez Castro, A Gopakumar, M L Gorodetsky, S E Gossan, M Gosselin, R Gouaty, A Grado, C Graef, M Granata, A Grant, S Gras, C Gray, G Greco, A C Green, P Groot, H Grote, S Grunewald, P Gruning, G M Guidi, X Guo, A Gupta, M K Gupta, K E Gushwa, E K Gustafson, R Gustafson, B R Hall, E D Hall, G Hammond, M Haney, M M Hanke, J Hanks, C Hanna, M D Hannam, O A Hannuksela, J Hanson, T Hardwick, J Harms, G M Harry, I W Harry, M J Hart, C-J Haster, K Haughian, J Healy, A Heidmann, M C Heintze, H Heitmann, P Hello, G Hemming, M Hendry, I S Heng, J Hennig, J Henry, A W Heptonstall, M Heurs, S Hild, D Hoak, D Hofman, K Holt, D E Holz, P Hopkins, C Horst, J Hough, E A Houston, E J Howell, Y M Hu, E A Huerta, D Huet, B Hughey, S Husa, S H Huttner, T Huynh-Dinh, N Indik, D R Ingram, R Inta, G Intini, H N Isa, J-M Isac, M Isi, B R Iyer, K Izumi, T Jacqmin, K Jani, P Jaranowski, S Jawahar, F Jiménez-Forteza, W W Johnson, N K Johnson-McDaniel, D I Jones, R Jones, R J G Jonker, L Ju, J Junker, C V Kalaghatgi, V Kalogera, S Kandhasamy, G Kang, J B Kanner, S Karki, K S Karvinen, M Kasprzack, M Katolik, E Katsavounidis, W Katzman, S Kaufer, K Kawabe, F Kéfélian, D Keitel, A J Kemball, R Kennedy, C Kent, J S Key, F Y Khalili, I Khan, S Khan, Z Khan, E A Khazanov, N Kijbunchoo, Chunglee Kim, J C Kim, W Kim, W S Kim, Y-M Kim, S J Kimbrell, E J King, P J King, R Kirchhoff, J S Kissel, L Kleybolte, S Klimenko, P Koch, S M Koehlenbeck, S Koley, V Kondrashov, A Kontos, M Korobko, W Z Korth, I Kowalska, D B Kozak, C Krämer, V Kringel, B Krishnan, A Królak, G Kuehn, P Kumar, R Kumar, S Kumar, L Kuo, A Kutynia, S Kwang, B D Lackey, K H Lai, M Landry, R N Lang, J Lange, B Lantz, R K Lanza, A Lartaux-Vollard, P D Lasky, M Laxen, A Lazzarini, C Lazzaro, P Leaci, S Leavey, C H Lee, H K Lee, H M Lee, H W Lee, K Lee, J Lehmann, A Lenon, M Leonardi, N Leroy, N Letendre, Y Levin, T G F Li, A Libson, T B Littenberg, J Liu, R K L Lo, N A Lockerbie, L T London, J E Lord, M Lorenzini, V Loriette, M Lormand, G Losurdo, J D Lough, G Lovelace, H Lück, D Lumaca, A P Lundgren, R Lynch, Y Ma, S Macfoy, B Machenschalk, M MacInnis, D M Macleod, I Magaña Hernandez, F Magaña-Sandoval, L Magaña Zertuche, R M Magee, E Majorana, I Maksimovic, N Man, V Mandic, V Mangano, G L Mansell, M Manske, M Mantovani, F Marchesoni, F Marion, S Márka, Z Márka, C Markakis, A S Markosyan, E Maros, F Martelli, L Martellini, I W Martin, D V Martynov, J N Marx, K Mason, A Masserot, T J Massinger, M Masso-Reid, S Mastrogiovanni, A Matas, F Matichard, L Matone, N Mavalvala, R Mayani, N Mazumder, R McCarthy, D E McClelland, S McCormick, L McCuller, S C McGuire, G McIntyre, J McIver, D J McManus, T McRae, S T McWilliams, D Meacher, G D Meadors, J Meidam, E Mejuto-Villa, A Melatos, G Mendell, R A Mercer, E L Merilh, M Merzougui, S Meshkov, C Messenger, C Messick, R Metzdorff, P M Meyers, F Mezzani, H Miao, C Michel, H Middleton, E E Mikhailov, L Milano, A L Miller, A Miller, B B Miller, J Miller, M Millhouse, O Minazzoli, Y Minenkov, J Ming, C Mishra, S Mitra, V P Mitrofanov, G Mitselmakher, R Mittleman, A Moggi, M Mohan, S R P Mohapatra, M Montani, B C Moore, C J Moore, D Moraru, G Moreno, S R Morriss, B Mours, C M Mow-Lowry, G Mueller, A W Muir, Arunava Mukherjee, D Mukherjee, S Mukherjee, N Mukund, A Mullavey, J Munch, E A M Muniz, P G Murray, K Napier, I Nardecchia, L Naticchioni, R K Nayak, G Nelemans, T J N Nelson, M Neri, M Nery, A Neunzert, J M Newport, G Newton, K K Y Ng, T T Nguyen, D Nichols, A B Nielsen, S Nissanke, A Nitz, A Noack, F Nocera, D Nolting, M E N Normandin, L K Nuttall, J Oberling, E Ochsner, E Oelker, G H Ogin, J J Oh, S H Oh, F Ohme, M Oliver, P Oppermann, Richard J Oram, B O'Reilly, R Ormiston, L F Ortega, R O'Shaughnessy, D J Ottaway, H Overmier, B J Owen, A E Pace, J Page, M A Page, A Pai, S A Pai, J R Palamos, O Palashov, C Palomba, A Pal-Singh, H Pan, B Pang, P T H Pang, C Pankow, F Pannarale, B C Pant, F Paoletti, A Paoli, M A Papa, H R Paris, W Parker, D Pascucci, A Pasqualetti, R Passaquieti, D Passuello, B Patricelli, B L Pearlstone, M Pedraza, R Pedurand, L Pekowsky, A Pele, S Penn, C J Perez, A Perreca, L M Perri, H P Pfeiffer, M Phelps, O J Piccinni, M Pichot, F Piergiovanni, V Pierro, G Pillant, L Pinard, I M Pinto, M Pitkin, R Poggiani, P Popolizio, E K Porter, A Post, J Powell, J Prasad, J W W Pratt, V Predoi, T Prestegard, M Prijatelj, M Principe, S Privitera, G A Prodi, L G Prokhorov, O Puncken, M Punturo, P Puppo, M Pürrer, H Qi, J Qin, S Qiu, V Quetschke, E A Quintero, R Quitzow-James, F J Raab, D S Rabeling, H Radkins, P Raffai, S Raja, C Rajan, M Rakhmanov, K E Ramirez, P Rapagnani, V Raymond, M Razzano, J Read, T Regimbau, L Rei, S Reid, D H Reitze, H Rew, S D Reyes, F Ricci, P M Ricker, S Rieger, K Riles, M Rizzo, N A Robertson, R Robie, F Robinet, A Rocchi, L Rolland, J G Rollins, V J Roma, J D Romano, R Romano, C L Romel, J H Romie, D Rosińska, M P Ross, S Rowan, A Rüdiger, P Ruggi, K Ryan, M Rynge, S Sachdev, T Sadecki, L Sadeghian, M Sakellariadou, L Salconi, M Saleem, F Salemi, A Samajdar, L Sammut, L M Sampson, E J Sanchez, V Sandberg, B Sandeen, J R Sanders, B Sassolas, B S Sathyaprakash, P R Saulson, O Sauter, R L Savage, A Sawadsky, P Schale, J Scheuer, E Schmidt, J Schmidt, P Schmidt, R Schnabel, R M S Schofield, A Schönbeck, E Schreiber, D Schuette, B W Schulte, B F Schutz, S G Schwalbe, J Scott, S M Scott, E Seidel, D Sellers, A S Sengupta, D Sentenac, V Sequino, A Sergeev, D A Shaddock, T J Shaffer, A A Shah, M S Shahriar, L Shao, B Shapiro, P Shawhan, A Sheperd, D H Shoemaker, D M Shoemaker, K Siellez, X Siemens, M Sieniawska, D Sigg, A D Silva, A Singer, L P Singer, A Singh, R Singh, A Singhal, A M Sintes, B J J Slagmolen, B Smith, J R Smith, R J E Smith, E J Son, J A Sonnenberg, B Sorazu, F Sorrentino, T Souradeep, A P Spencer, A K Srivastava, A Staley, M Steinke, J Steinlechner, S Steinlechner, D Steinmeyer, B C Stephens, S P Stevenson, R Stone, K A Strain, G Stratta, S E Strigin, R Sturani, A L Stuver, T Z Summerscales, L Sun, S Sunil, P J Sutton, B L Swinkels, M J Szczepańczyk, M Tacca, D Talukder, D B Tanner, M Tápai, A Taracchini, J A Taylor, R Taylor, T Theeg, E G Thomas, M Thomas, P Thomas, K A Thorne, K S Thorne, E Thrane, S Tiwari, V Tiwari, K V Tokmakov, K Toland, M Tonelli, Z Tornasi, C I Torrie, D Töyrä, F Travasso, G Traylor, D Trifirò, J Trinastic, M C Tringali, L Trozzo, K W Tsang, M Tse, R Tso, D Tuyenbayev, K Ueno, D Ugolini, C S Unnikrishnan, A L Urban, S A Usman, K Vahi, H Vahlbruch, G Vajente, G Valdes, M Vallisneri, N van Bakel, M van Beuzekom, J F J van den Brand, C Van Den Broeck, D C Vander-Hyde, L van der Schaaf, J V van Heijningen, A A van Veggel, M Vardaro, V Varma, S Vass, M Vasúth, A Vecchio, G Vedovato, J Veitch, P J Veitch, K Venkateswara, G Venugopalan, D Verkindt, F Vetrano, A Viceré, A D Viets, S Vinciguerra, D J Vine, J-Y Vinet, S Vitale, T Vo, H Vocca, C Vorvick, D V Voss, W D Vousden, S P Vyatchanin, A R Wade, L E Wade, M Wade, R M Wald, R Walet, M Walker, L Wallace, S Walsh, G Wang, H Wang, J Z Wang, M Wang, Y-F Wang, Y Wang, R L Ward, J Warner, M Was, J Watchi, B Weaver, L-W Wei, M Weinert, A J Weinstein, R Weiss, L Wen, E K Wessel, P Weßels, T Westphal, K Wette, J T Whelan, B F Whiting, C Whittle, D Williams, R D Williams, A R Williamson, J L Willis, B Willke, M H Wimmer, W Winkler, C C Wipf, H Wittel, G Woan, J Woehler, J Wofford, K W K Wong, J Worden, J L Wright, D S Wu, G Wu, W Yam, H Yamamoto, C C Yancey, M J Yap, Hang Yu, Haocun Yu, M Yvert, A Zadrożny, M Zanolin, T Zelenova, J-P Zendri, M Zevin, L Zhang, M Zhang, T Zhang, Y-H Zhang, C Zhao, M Zhou, Z Zhou, X J Zhu, A Zimmerman, M E Zucker, J Zweizig
We describe the observation of GW170104, a gravitational-wave signal produced by the coalescence of a pair of stellar-mass black holes. The signal was measured on January 4, 2017 at 10∶11:58.6 UTC by the twin advanced detectors of the Laser Interferometer Gravitational-Wave Observatory during their second observing run, with a network signal-to-noise ratio of 13 and a false alarm rate less than 1 in 70 000 years. The inferred component black hole masses are 31.2_{-6.0}^{+8.4}M_{⊙} and 19.4_{-5.9}^{+5...
June 2, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28598651/testing-general-relativity-with-stellar-orbits-around-the-supermassive-black-hole-in-our-galactic-center
#16
A Hees, T Do, A M Ghez, G D Martinez, S Naoz, E E Becklin, A Boehle, S Chappell, D Chu, A Dehghanfar, K Kosmo, J R Lu, K Matthews, M R Morris, S Sakai, R Schödel, G Witzel
We demonstrate that short-period stars orbiting around the supermassive black hole in our Galactic center can successfully be used to probe the gravitational theory in a strong regime. We use 19 years of observations of the two best measured short-period stars orbiting our Galactic center to constrain a hypothetical fifth force that arises in various scenarios motivated by the development of a unification theory or in some models of dark matter and dark energy. No deviation from general relativity is reported and the fifth force strength is restricted to an upper 95% confidence limit of |α|<0...
May 26, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28597486/recent-progress-on-localized-field-enhanced-two-dimensional-material-photodetectors-from-ultraviolet-visible-to-infrared
#17
REVIEW
Jianlu Wang, Hehai Fang, Xudong Wang, Xiaoshuang Chen, Wei Lu, Weida Hu
Two-dimensional (2D) materials have drawn tremendous attention in recent years. Being atomically thin, stacked with van der Waals force and free of surface chemical dangling bonds, 2D materials exhibit several distinct physical properties. To date, 2D materials include graphene, transition metal dichalcogenides (TMDS), black phosphorus, black P(1-x) Asx , boron nitride (BN) and so forth. Owing to their various bandgaps, 2D materials have been utilized for photonics and optoelectronics. Photodetectors based on 2D materials with different structures and detection mechanisms have been established and present excellent performance...
June 8, 2017: Small
https://www.readbyqxmd.com/read/28596703/black-holes-in-multi-fractional-and-lorentz-violating-models
#18
Gianluca Calcagni, David Rodríguez Fernández, Michele Ronco
We study static and radially symmetric black holes in the multi-fractional theories of gravity with q-derivatives and with weighted derivatives, frameworks where the spacetime dimension varies with the probed scale and geometry is characterized by at least one fundamental length [Formula: see text]. In the q-derivatives scenario, one finds a tiny shift of the event horizon. Schwarzschild black holes can present an additional ring singularity, not present in general relativity, whose radius is proportional to [Formula: see text]...
2017: European Physical Journal. C, Particles and Fields
https://www.readbyqxmd.com/read/28593956/corrigendum-black-hole-growth-in-the-early-universe-is-self-regulated-and-largely-hidden-from-view
#19
Ezequiel Treister, Kevin Schawinski, Marta Volonteri, Priyamvada Natarajan, Eric Gawiser
This corrects the article DOI: 10.1038/nature10103.
June 7, 2017: Nature
https://www.readbyqxmd.com/read/28593070/safety-evaluation-of-the-lighting-at-the-entrance-of-a-very-long-road-tunnel-a-case-study-in-ilam
#20
Ahmad Mehri, Roohalah Hajizadeh, Somayeh Farhang Dehghan, Parvin Nassiri, Sayed Mohammad Jafari, Fereshteh Taheri, Seyed Abolfazl Zakerian
BACKGROUND: At the entrance of a tunnel, reflection of sunlight from the surrounding environment and a lack of adequate lighting usually cause some vision problems. The purpose of this study was to perform a safety evaluation of lighting on a very long road in Ilam, Iran. METHODS: The average luminance was measured using a luminance meter (model S3; Hagner, Solna, Sweden). A camera (model 108, 35-mm single-lens reflex; Yashica, Nagano, Japan) was used to take photographs of the safe stopping distance from the tunnel entrance...
June 2017: Safety and Health At Work
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