Zobrazeno 1 - 10
of 491
pro vyhledávání: '"Lasota, J. P."'
Publikováno v:
A&A 664, A7 (2022)
Some intermediate polars show outbursts that are much shorter than those observed in normal dwarf novae, and whose origin has remained unelucidated for a long time. We examine here the case of V1223 Sgr, an intermediate polar that showed a short outb
Externí odkaz:
http://arxiv.org/abs/2205.11227
Autor:
Scaringi, S., Groot, P. J., Knigge, C., Lasota, J. -P., de Martino, D., Cavecchi, Y., Buckley, D. A. H., Camisassa, M. E.
Rapid bursts at optical wavelengths have been reported for several accreting white dwarfs, where the optical luminosity can increase by up to a factor 30 in less than an hour fading on timescales of several hours, and where the energy release can rea
Externí odkaz:
http://arxiv.org/abs/2204.09073
Autor:
Scaringi, S., Groot, P. J., Knigge, C., Bird, A. J., Breedt, E., Buckley, D. A. H., Cavecchi, Y., Degenaar, N. D., de Martino, D., Done, C., Fratta, M., Ilkiewicz, K., Koerding, E., Lasota, J. -P., Littlefield, C., Manara, C. F., O'Brien, M., Szkody, P., Timmes, F. X.
Nova explosions are caused by global thermonuclear runaways triggered in the surface layers of accreting white dwarfs. It has been predicted that localised thermonuclear bursts on white dwarfs can also take place, similar to Type I X-ray bursts obser
Externí odkaz:
http://arxiv.org/abs/2204.09070
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
Autor:
Hameury, J. -M., Lasota, J. -P.
Publikováno v:
A&A 650, A114 (2021)
The disc instability model accounts well for most of the observed properties of dwarf novae and soft X-ray transients, but the rebrightenings, reflares, and echoes occurring at the end of outbursts or shortly after in WZ Sge stars or soft X-ray trans
Externí odkaz:
http://arxiv.org/abs/2104.02952
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
Publikováno v:
A&A 636, A1 (2020)
Context. Although the disc instability model is widely accepted as the explanation for dwarf nova outbursts, it is still necessary to confront its predictions to observations because much of the constraints on angular momentum transport in accretion
Externí odkaz:
http://arxiv.org/abs/2003.03056
Autor:
Vincent, F. H., Wielgus, M., Abramowicz, M. A., Gourgoulhon, E., Lasota, J. -P., Paumard, T., Perrin, G.
Publikováno v:
A&A 646, A37 (2021)
Context. The Event Horizon Telescope (EHT) collaboration recently obtained first images of the surroundings of the supermassive compact object M87* at the center of the galaxy M87. Aims. We want to develop a simple analytic disk model for the accreti
Externí odkaz:
http://arxiv.org/abs/2002.09226
Autor:
Zhang, Guobao, Bernardini, F., Russell, D. M., Gelfand, J. D., Lasota, J. -P., Qasim, A. Al, AlMannaei, A., Koljonen, K. I. I., Shaw, A. W., Lewis, F., Tomsick, J. A., Plotkin, R. M., Miller-Jones, J. C. A., Maitra, D., Homan, J., Charles, P. A., Kobel, P., Perez, D., Doran, R.
We present optical, UV and X-ray monitoring of the short orbital period black hole X-ray binary candidate Swift J1753.5-0127, focusing on the final stages of its 12$-$year long outburst that started in 2005. From September 2016 onward, the source sta
Externí odkaz:
http://arxiv.org/abs/1903.09455