Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Alexey Bobrick"'
Publikováno v:
Universe, Vol 9, Iss 4, p 162 (2023)
We describe the construction of an optical-space, cylindrical black hole induced by high pressure in a dense fluid. Using an approximate analogy between curved spacetime and optics in moving dielectric media, we derive the mass of the black hole thus
Externí odkaz:
https://doaj.org/article/00f47c8ccb5a4e4ea03d4e32dc0e15bd
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 507:156-174
Active galactic nuclei (AGN) are prominent environments for stellar capture, growth and formation. These environments may catalyze stellar mergers and explosive transients, such as thermonuclear and core-collapse supernovae (SNe). SN explosions in AG
Autor:
Niranjan C. Roy, Vishal Tiwari, Alexey Bobrick, Daniel Kosakowski, Robert Fisher, Hagai B. Perets, Rahul Kashyap, Pablo Lorén-Aguilar, Enrique García-Berro
Publikováno v:
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Universitat Politècnica de Catalunya (UPC)
The origins of type Ia supernovae (SNe Ia) are still debated. Some of the leading scenarios involve a double detonation in double white dwarf (WD) systems. In these scenarios, helium shell detonation occurs on top of a carbon-oxygen (CO) WD, which th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::88b8b8e4d2ca156466ce401585af44e9
http://arxiv.org/abs/2204.09683
http://arxiv.org/abs/2204.09683
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 493:3956-3965
Mergers of neutron stars (NS) and white dwarfs (WD) may give rise to observable explosive transient events. We use 3D hydrodynamical (SPH) simulations, as well as 2D hydrodynamical-thermonuclear simulations (using the FLASH AMR code) to model the dis
Publikováno v:
Astronomy & Astrophysics. 668:A89
The current theory predicts that hot subdwarf binaries are produced from evolved low-mass binaries that have undergone mass transfer and drastic mass loss during either a common envelope phase or a stable Roche lobe overflow while on the red giant br
We conduct the first 3D hydrodynamic simulations of oxygen-neon white-dwarf-neutron star/black hole mergers (ONe WD-NS/BH mergers). Such mergers constitute a significant fraction, and may even dominate, the inspiral rates of all WD-NS binaries. We po
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78e691679a0f599ec35b6c9fdfdad706
http://arxiv.org/abs/2104.03415
http://arxiv.org/abs/2104.03415
Autor:
Gianni Martire, Alexey Bobrick
The Alcubierre warp drive is an exotic solution in general relativity. It allows for superluminal travel at the cost of enormous amounts of matter with negative mass density. For this reason, the Alcubierre warp drive has been widely considered unphy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24d335d2fb27c30e9ecf31647163ea1d
http://arxiv.org/abs/2102.06824
http://arxiv.org/abs/2102.06824
Autor:
J. J. Hermes, V. Schaffenroth, Murat Uzundag, Maja Vučković, Stephan Geier, Joshua S. Reding, Alexey Bobrick, Ingrid Pelisoli, Jan Budaj, N. Reindl, J. Vos, P. Nemeth, Roy Ostensen
Context. We present the discovery of J22564–5910, a new type of hot subdwarf (sdB) which shows evidence of gas present in the system and it has shallow, multi-peaked hydrogen and helium lines which vary in shape over time. All observational evidenc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d787aa74a9ffbfa82e5cf1496c58db44
Autor:
Daniel Kasen, Matthew R. Siebert, C. Pellegrino, Sebastian Gomez, P. Short, Lluís Galbany, Stephen J. Smartt, Holland Stacey, Joel Shepherd, T. E. Müller-Bravo, Juanjuan Ren, A. Hajela, Jozsef Vinko, Xiaofeng Wang, Matthew Dobson, Anthony L. Piro, Sung-Chul Yoon, E. Baron, Mohammed Rahman, Jujia Zhang, Peter K. Blanchard, Deanne L. Coppejans, David A. Coulter, Wynn V. Jacobson-Galán, András Pál, Lindsay DeMarchi, Edo Berger, Michael D. Stroh, Georgios Dimitriadis, Levente Kriskovics, A. Ordasi, D. Andrew Howell, Christoffer Fremling, César Rojas-Bravo, Armin Rest, Curtis McCully, Jamison Burke, Jennifer E. Andrews, Hagai B. Perets, X. Zhang, Raffaella Margutti, R. Michael Rich, Dan Milisavljevic, James M. DerKacy, David K. Khatami, Kaicheng Zhang, David J. Sand, Yossef Zenati, Daichi Hiramatsu, Hanna Sai, Joseph P. Anderson, Candice Stauffer, Ryan J. Foley, Jonathan J. Swift, Róbert Szakáts, Hanindyo Kuncarayakti, John C. Raymond, Peter de Nully Brown, Krisztián Sárneczky, Mariusz Gromadzki, Charles D. Kilpatrick, Giacomo Terreran, Alexey Bobrick, Griffin Hosseinzadeh, Matt Nicholl, Ken J. Shen, Régis Cartier
Publikováno v:
The Astrophysical Journal
We present panchromatic observations and modeling of the Calcium-rich supernova 2019ehk in the star-forming galaxy M100 (d$\approx$16.2 Mpc) starting 10 hours after explosion and continuing for ~300 days. SN 2019ehk shows a double-peaked optical ligh
Publikováno v:
Astronomy & Astrophysics. 641:A163
Wide hot subdwarf B (sdB) binaries with main-sequence companions are outcomes of stable mass transfer from evolved red giants. The orbits of these binaries show a strong correlation between their orbital periods and mass ratios. The origins of this c