Zobrazeno 1 - 10
of 285
pro vyhledávání: '"Schwope, Axel"'
Autor:
Schwope, Axel, Knauff, Kira, Kurpas, Jan, Salvato, Mara, Stelzer, Beate, Stütz, Laurent, Tubín-Arenas, Dusan
(abridged) We present an account of known cataclysmic variables (CVs) that were detected as X-ray sources in eROSITA X-ray surveys and have Gaia DR3 counterparts. We address standard CVs with main sequence donors and white dwarfs accreting via Roche-
Externí odkaz:
http://arxiv.org/abs/2407.20903
Autor:
Joshi, Arti, Catelan, Márcio, Scaringi, Simone, Schwope, Axel, Anupama, G. C., Rawat, Nikita, Sahu, Devendra K., Singh, Mridweeka, Dastidar, Raya, Subramanian, Rama Venkata, Rao, Srinivas M
We present the analysis of optical photometric and spectroscopic observations of two non-magnetic cataclysmic variables, namely CRTS J080846.2+313106 and V416 Dra. CRTS J080846.2+313106 has been found to vary with a period of 4.9116$\pm$0.0003 h, whi
Externí odkaz:
http://arxiv.org/abs/2407.07387
Autor:
Inight, Keith, Gänsicke, Boris T., Schwope, Axel, Anderson, Scott F., Breedt, Elmé, Brownstein, Joel R., Demasi, Sebastian, Friedrich, Susanne, Hermes, J. J., Long, Knox S., Mulvany, Timothy, Pallathadka, Gautham A., Salvato, Mara, Scaringi, Simone, Schreiber, Matthias R., Stringfellow, Guy S., Thorstensen, John R., Zakamska, Nadia L.
SDSS-V is carrying out a dedicated survey for white dwarfs, single and in binaries, and we report the analysis of the spectroscopy of 505 cataclysmic variables (CVs) and CV candidates obtained during the first 34 months of observations of SDSS-V. We
Externí odkaz:
http://arxiv.org/abs/2406.19459
Publikováno v:
A&A 686, A175 (2024)
In this study, we report a discovery from XMM-Newton, which involves the identification and subsequent examination of a newly discovered polar-type cataclysmic variable named XMM J152737.4-205305.9. The discovery was made by matching the XMM-Newton d
Externí odkaz:
http://arxiv.org/abs/2403.14278
Autor:
Leichty, McKenna, Garnavich, Peter, Littlefield, Colin, Schwope, Axel D., Kurpas, Jan, Mason, Paul A., Beuermann, Klaus
We analyze 15 years of eclipse timings of the polar V808 Aur. The rapid ingress/egress of the white dwarf and bright accretion region provide timings as precise as a few tenths of a second for rapid cadence photometric data. We find that between 2015
Externí odkaz:
http://arxiv.org/abs/2402.16959
Recently, large and homogeneous samples of cataclysmic variables (CVs) identified by the Sloan Digital Sky Survey (SDSS) were published. In these samples, the famous orbital period gap, which is a dearth of systems in the orbital period range ~2-3 hr
Externí odkaz:
http://arxiv.org/abs/2402.02076
Publikováno v:
A&A 687, A305 (2024)
Context. Cataclysmic variables with degenerate donors which have evolved past the period minimum, also known as period-bouncers, are predicted to make up a great portion of the cataclysmic variable population, between 40 and 70 percent. However, eith
Externí odkaz:
http://arxiv.org/abs/2401.17298
Autor:
Pelisoli, Ingrid, Sahu, Snehalata, Lyutikov, Maxim, Barkov, Maxim, Gaensicke, Boris T., Brink, Jaco, Buckley, David A. H., Potter, Stephen B., Schwope, Axel, Ramirez, S. H.
J191213.72-441045.1 is a binary system composed of a white dwarf and an M-dwarf in a 4.03-hour orbit. It shows emission in radio, optical, and X-ray, all modulated at the white dwarf spin period of 5.3 min, as well as various orbital sideband frequen
Externí odkaz:
http://arxiv.org/abs/2311.05558
Autor:
Schwope, Axel, Marsh, T. R., Standke, Annie, Pelisoli, Ingrid, Potter, Stephen, Buckley, David, Munday, James, Dhillon, Vik
Publikováno v:
A&A, 2023, 674, L9
We report X-ray observations of the newly discovered pulsating white dwarf eRASSU J191213.9-441044 with Spectrum Roentgen Gamma and eROSITA (SRG/eROSITA) and XMM-Newton. The new source was discovered during the first eROSITA all-sky survey at a flux
Externí odkaz:
http://arxiv.org/abs/2306.09732
Autor:
Pelisoli, Ingrid, Marsh, T. R., Buckley, David A. H., Heywood, I., Potter, Stephen. B., Schwope, Axel, Brink, Jaco, Standke, Annie, Woudt, P. A., Parsons, S. G., Green, M. J., Kepler, S. O., Munday, James, Romero, A. D., Breedt, E., Brown, A. J., Dhillon, V. S., Dyer, M. J., Kerry, P., Littlefair, S. P., Sahman, D. I., Wild, J. F.
White dwarf stars are the most common stellar fossils. When in binaries, they make up the dominant form of compact object binary within the Galaxy and can offer insight into different aspects of binary formation and evolution. One of the most remarka
Externí odkaz:
http://arxiv.org/abs/2306.09272