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pro vyhledávání: '"Belczynski K"'
Massive stars are the progenitors of black holes and neutron stars, the mergers of which can be detected with gravitational waves (GW). The expansion of massive stars is one of the key factors affecting their evolution in close binary systems, but it
Externí odkaz:
http://arxiv.org/abs/2211.15800
The LIGO-Virgo-KAGRA (LVK) Collaboration has reported nearly 100 BH-BH mergers. The LVK provides estimates of rates, masses, effective spins, and redshifts for these mergers. Yet, the formation channel(s) of the mergers remains uncertain. One way to
Externí odkaz:
http://arxiv.org/abs/2204.11730
Autor:
Guelbenzu, A. M. Nicuesa, Klose, S., Schady, P., Belczynski, K., Hartmann, D. H., Hunt, L. K., Michałowski, M. J.
Short-GRB progenitors could come in various flavors, depending on the nature of the merging compact stellar objects (including a stellar-mass black hole or not) or depending on their ages (millions or billions of years). At a redshift of z=0.122, the
Externí odkaz:
http://arxiv.org/abs/2112.04924
Publikováno v:
A&A 690, A21 (2024)
Black-hole (BH) high-mass X-ray binary (HMXB) systems are likely to be the progenitors of BH-BH mergers detected by LIGO/Virgo/KAGRA (LVK). Yet merging BHs reach higher masses ($\sim 100M_{\odot}$) than BHs in HMXBs ($\sim 20 M_{\odot}$) and exhibit
Externí odkaz:
http://arxiv.org/abs/2111.09401
Autor:
Belczynski, K., Romagnolo, A., Olejak, A., Klencki, J., Chattopadhyay, D., Stevenson, S., Miller, M. Coleman, Lasota, J. -P., Crowther, P. A.
The LIGO/Virgo gravitational--wave observatories have detected 50 BH-BH coalescences. This sample is large enough to have allowed several recent studies to draw conclusions about the branching ratios between isolated binaries versus dense stellar clu
Externí odkaz:
http://arxiv.org/abs/2108.10885
Publikováno v:
A&A 667, A55 (2022)
HR 6819 was recently reported to be a triple system with a dormant black hole (BH). The inner binary system was defined as a star estimated to be at the end of its main sequence and a dormant BH. As the inner binary is not resolved, the third compone
Externí odkaz:
http://arxiv.org/abs/2107.08930
Energy released when the core of a high-mass star collapses into a black hole often powers an explosion that creates a supernova remnant. Black holes have limited windows of observability, and consequently are rarely identified in association with su
Externí odkaz:
http://arxiv.org/abs/2010.15341
Publikováno v:
Astronomy & Astrophysics, Volume 667, (2022), id.A126, 15 pp
Observations of X-ray binaries indicate a dearth of compact objects in the mass range from $\sim 2-5 M_{\odot}$. The existence of this (first mass) gap has been used to discriminate between proposed engines behind core-collapse supernovae. From LIGO/
Externí odkaz:
http://arxiv.org/abs/2009.06655
Autor:
Olejak, A., Fishbach, M., Belczynski, K., Holz, D. E., Lasota, J. -P., Miller, M. C., Bulik, T.
The LIGO/Virgo collaboration has reported the detection of GW190412, a BH-BH merger with the most unequal masses to date: 24.4-34.7 Msun and 7.4-10.1 Msun (a mass ratio of q=0.21-0.41). Additionally, GW190412's effective spin was estimated to be Xeff
Externí odkaz:
http://arxiv.org/abs/2004.11866
Autor:
Gandhi, P., Rao, A., Charles, P. A., Belczynski, K., Maccarone, T. J., Arur, K., Corral-Santana, J. M.
There remain significant uncertainties in the origin and evolution of black holes in binary systems, in particular regarding their birth sites and the influence of natal kicks. These are long-standing issues, but their debate has been reinvigorated i
Externí odkaz:
http://arxiv.org/abs/2002.00871