Results 91 to 100 of about 805 (173)

ON THE OBSERVED PHYSICAL PROPERTIES AND EVOLUTIONARY TRENDS OF HOT SUBDWARFS IN BINARY SYSTEMS

Odessa Astronomical Publications, 2017
In our brief review we summarize the latest advances in studies of white dwarfs both as single objects and the components of binary systems. We discuss the observed properties of the hot subdwarfs (sdws), the various techniques of their discovery and ...
I. Pustylnik
doaj   +1 more source

SuperWASP Lightcurves of Subdwarf Stars [PDF]

, 2008
SuperWASP is a wide angle survey for transiting hot-Jupiter exoplanets around bright ...
Maxted, P. F. L., Norton, A. J., West, R. G., Copperwheat, C., Marsh, T. R.   +4 more
openaire   +1 more source

Trigonometric parallaxes of ten ultracool subdwarfs

, 2008
Aims. We measure absolute trigonometric parallaxes and proper motions with respect to many background galaxies for a sample of ten ultracool subdwarfs. Methods.
R.-D. Scholz, S. Röser, E. Schilbach
core   +1 more source

HR6819: a puffed-up stripped star system challenging stable mass transfer theory

Astronomy & Astrophysics
Context. HR6819 is the first system with a puffed-up low-mass stripped star + a classical Be star whose nature has been confirmed by optical interferometry.
Picco A., Marchant P., Sana H., Bodensteiner J., Shenar T., Frost A. J., Deshmukh K., Mombarg J. S. G., Pauli D., Willcox R., Kemp A.   +10 more
doaj   +1 more source

Infrared flux excesses from hot subdwarfs

, 1998
In our search, started in February, 1994, for JHK excess fluxes among the hot subdwarf population as an indicator for the presence of binary companions, results for 72 more hot objects (=63 hot subdwarfs + 1 Horizontal Branch B star + 7 white dwarfs +
A. Ulla, P. Thejll
core   +1 more source

The massive hot subdwarf binary LAMOST J065816.72+094343.1

Astronomy & Astrophysics
Context. Massive short-period binaries involving hot subdwarf stars (sdO/Bs) are rare but very relevant to constraining pathways for binary star evolution.
Mattig F., Barlow B. N., Liu D., Dorsch M., Geier S., Pritzkuleit M., Dawson H., Wang B., Schaffenroth V., Kupfer T., Derbyshire C., Barocci-Faul S.   +11 more
doaj   +1 more source

Analysis of F and G Subdwarfs. III. an Abundance Analysis of the Subdwarf μ Cassiopeia [PDF]

The Astrophysical Journal, 1968
Model atmosphere abundance analysis of subdwarf mu Cassiopeia by measuring spectral line widths and comparing with ...
openaire   +2 more sources

BlackGEM observations of compact pulsating stars

Astronomy & Astrophysics
Context. While space-based telescopes offer unparalleled precision for asteroseismology, ground-based observations remain crucial for identifying compact pulsator candidates and enabling their pulsational study through multi-colour photometry.
Ranaivomanana P., Johnston C., Uzundag M., Groot P. J., Kupfer T., Bloemen S., Vreeswijk P. M., van Roestel J. C. J., Pieterse D. L. A., Paice J., Kosakowski A., Ramsay G., Aerts C.   +12 more
doaj   +1 more source

Meet the family − the catalog of known hot subdwarf stars

Open Astronomy, 2017
In preparation for the upcoming all-sky data releases of the Gaia mission, we compiled a catalog of known hot subdwarf stars and candidates drawn from the literature and yet unpublished databases.
Geier Stephan, Østensen Roy H., Nemeth Peter, Heber Ulrich, Gentile Fusillo Nicola P., Gänsicke Boris T., Telting John H., Green Elizabeth M., Schaffenroth Johannes   +8 more
doaj   +1 more source

The evolution of a hot subdwarf: observations of the pulsating subdwarf B star Feige~48

, 2003
Since pulsating subdwarf B (sdBV or EC14026) stars were first discovered (Kilkenny et al, 1997), observational efforts have tried to realize their potential for constraining the interior physics of extreme horizontal branch (EHB) stars. Difficulties encountered along the way include uncertain mode identifications and a lack of stable pulsation mode ...
Reed, M. D., Kawaler, S. D., teams., the Whole Earth Telescope XCov 17 / 21 / 23   +2 more
openaire   +2 more sources