Zobrazeno 1 - 10
of 56
pro vyhledávání: '"Horst Drechsel"'
Autor:
Luigi Mancini, U. Heber, David Kilkenny, Horst Drechsel, Roy Ostensen, Andreas Irrgang, J. H. Telting, V. Schaffenroth, J. Vos, Roberto Silvotti, Simona Ciceri
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 500:2461-2474
EPIC 216747137 is a new HW~Virginis system discovered by the Kepler spacecraft during its K2 "second life". Like the other HW Vir systems, EPIC 216747137 is a post-common-envelope eclipsing binary consisting of a hot subluminous star and a cool low-m
Autor:
Marek Wolf, Petr Zasche, A. Henden, G. W. Christie, W. S. G. Walker, Horst Drechsel, Hrvoje Božić, Brad N. Barlow, T. Bohlsen, Y. Fremat, P. Harmanec, P. Mayer, A. Nasseri, R. Catalan-Hurtado, R. Chini
Publikováno v:
Contributions of the Astronomical Observatory Skalnaté Pleso. 50
Autor:
Ulrich Heber, Lev R. Yungelson, Sabine Moehler, S. Catalán, C. A. Karl, Bruno Leibundgut, Horst Drechsel, Gijs Nelemans, A. Stroer, Alvio Renzini, Detlev Koester, Dieter Reimers, Thorsten Lisker, T. R. Marsh, R. Napiwotzki, Derek Homeier
Publikováno v:
Astronomy & Astrophysics. 638:A131
Close double degenerate binaries are one of the favoured progenitor channels for type Ia supernovae, but it is unclear how many suitable systems there are in the Galaxy. We report results of a large radial velocity survey for double degenerate (DD) b
Autor:
Tom Marsh, Andreas Irrgang, Horst Drechsel, Maximilian Wolz, David Levitan, V. S. Dhillon, J. J. Hermes, Steven Bloemen, Ulrich Heber, Thomas Kupfer
Publikováno v:
Open Astronomy, 27, 80-90
Open Astronomy, Vol 27, Iss 1, Pp 80-90 (2018)
Open Astronomy, 27, 1, pp. 80-90
Open Astronomy, Vol 27, Iss 1, Pp 80-90 (2018)
Open Astronomy, 27, 1, pp. 80-90
HW Vir systems are rare eclipsing binary systems including a subdwarf B star (sdB) with a faint companion, mostly M-dwarfs. Up to now, 19 HW Vir systems have been published, three of them with substellar companions. We report the spectroscopic as wel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::136ddc2f3d49211e934656d4a2637ea3
https://hdl.handle.net/https://repository.ubn.ru.nl/handle/2066/195475
https://hdl.handle.net/https://repository.ubn.ru.nl/handle/2066/195475
Autor:
Simon Kreuzer, Stefan Kimeswenger, T. R. Marsh, E. Ziegerer, Thomas Kupfer, Horst Drechsel, Marek Wolf, J. Freudenthal, V. Schaffenroth, M. Wolz, D. Kilkenny, Maja Vučković, Stephan Geier, S. Dreizler, Ulrich Heber, I. Pelisoli, Brad N. Barlow
Publikováno v:
Astronomy & Astrophysics. 630:A80
Eclipsing post-common-envelope binaries are highly important for resolving the poorly understood, very short-lived common-envelope phase of stellar evolution. Most hot subdwarfs (sdO/Bs) are the bare helium-burning cores of red giants that have lost
Autor:
Aaron P. LaCluyze, R. G. O'Steen, Brad N. Barlow, B. H. Dunlap, Horst Drechsel, Melissa C. Nysewander, J. B. Haislip, Donal O'Donoghue, J. C. Clemens, Stephan Geier, David Kilkenny, K. M. Ivarsen, Daniel E. Reichart
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 430:22-31
We announce the discovery of a new eclipsing hot subdwarf B + M dwarf binary, EC 10246-2707, and present multi-colour photometric and spectroscopic observations of this system. Similar to other HW Vir-type binaries, the light curve shows both primary
Autor:
H. Hirsch, Horst Drechsel, Sebastian Müller, V. Schaffenroth, Pierre F. L. Maxted, Ulrich Heber, L. Classen, Boris T. Gänsicke, Brad N. Barlow, Thomas Kupfer, Stephan Geier, Tom Marsh, E. Ziegerer, Simon J. O'Toole, Roy Ostensen, Ralf Napiwotzki, O. Cordes, A. Tillich
Publikováno v:
Astronomische Nachrichten. 333:431-435
The project Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS) aims at finding hot subdwarf stars with massive compact companions (white dwarfs with masses $M>1.0 {\rm M_{\odot}}$, neutron stars or black holes). The exist
Publikováno v:
Astronomische Nachrichten. 331:274-281
UBV measurements of early-type stars, mostly eclipsing binaries, obtained at La Silla in the years 1990 to 1994 with the ESO 50 cm telescope are presented. Most of these data were already used in our individual studies of several binaries. Now all ph
Autor:
R. Lorenz, Horst Drechsel, Petr Harmanec, Nidia Morrell, S. Nesslinger, Pavel Mayer, Marek Wolf
Publikováno v:
Astronomy & Astrophysics. 481:183-192
Context. In spite of the importance of massive O-type stars for astrophysics, their accurate masses and other fundamental properties are still a matter of debate. Determining them reliably is hampered by various factors (stellar winds and other forms
Hot subdwarf B stars (sdBs) are evolved, core helium-burning objects located on the extreme horizontal branch. Their formation history is still puzzling as the sdB progenitors must lose nearly all of their hydrogen envelope during the red-giant phase
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d4ac1a057806d713b5ce95e27f770afe