Results 41 to 50 of about 127 (114)
EXOTIME: searching for planets around pulsating subdwarf B stars [PDF]
Astrophysics and Space Science, 2010 Contribution to: The Fourth Meeting on Hot Subdwarf Stars and Related Objects, 20 - 24 July 2009, Shanghai, China, published 03/2010 by Ap&SS (Open access publication).
Schuh, Sonja +29 more
openaire +4 more sources
, 2018 Subdwarf B (sdB) stars are horizontal branch stars with thin hydrogen envelopes surrounding a half solar mass helium core. Following their classification in 1966 by Greenstein, little progress was made in understanding these apparently common stars. When pulsators were discovered by Kilkenny et al.
openaire +3 more sources
Rotation Signatures of TESS B-type Stars: Enlarging the Sample
The Astrophysical JournalMassive stars are essential for the evolution and chemical enrichment of the universe, yet their structure and evolution remain poorly understood. This study aims to expand the sample of B-type stars with known rotation periods by analyzing NASA’s ...
J. P. S. Campelo +10 more
doaj +1 more source
X-ray emission from hot subdwarfs with compact companions
EPJ Web of Conferences, 2013 We review the X-ray observations of hot subdwarf stars. While no X-ray emission has been detected yet from binaries containing B-type subdwarfs, interesting results have been obtained in the case of the two luminous O-type subdwarfs HD 49798 and BD + 37°
Esposito P. +3 more
doaj +1 more source
Hot subdwarf stars from the Hamburg Quasar Survey
Astronomy & AstrophysicsHot subluminous stars (subdwarf B&O; sdB, sdO) are evolved low mass stars originating from red giants that lost their envelope almost entirely. The multitude of observed phenomena imply that several pathways may form hot subdwarfs, most involving close ...
Heber U. +6 more
doaj +1 more source
Hot subdwarf stars in close-up view [PDF]
Astronomy & Astrophysics, 2012 Subluminous B stars (sdBs) form the extremely hot end of the horizontal branch and are therefore related to the blue horizontal branch (BHB) stars. While the rotational properties of BHB stars have been investigated extensively, studies of sdB stars have concentrated on close binaries that are influenced by tidal interactions between their components ...
Geier, S., Heber, U.
openaire +2 more sources
The Astrophysical JournalHot subdwarf (sdB) stars in binary systems with main-sequence (MS) companions provide valuable insights into mass transfer and envelope ejection processes in binary evolution.
Jiangdan Li +7 more
doaj +1 more source
A Target or the Next XCov23 Campaign: KPD 1930+2752
Open Astronomy, 2003 KPD 1930+2752 is a pulsating subdwarf B star with a particularly rich period spectrum, likely due to significant rotational splitting. It is also a short period (~ 2h17m), close binary system (as revealed by the presence of an ellipsoidal variation in ...
Charpinet S., Reed M.D.
doaj +1 more source
Are there Two Populations of subdwarf B Stars Visible in Kinematic Samples? [PDF]
Symposium - International Astronomical Union, 1995 The discussions about stellar populations and their spatial distribution can be best advanced by studies of special and well defined star types. The study of subdwarf B stars provides great promise: it is relatively easy both to find sdB stars and to determine their physical parameters.
K. S. De Boer +7 more
openaire +1 more source
EPJ Web of Conferences, 2017 Nonlinear mode interactions are difficult to observe from ground-based telescopes as the typical periods of the modulations induced by those nonlinear phenomena are on timescales of weeks, months, even years. The launch of space telescopes, e.g., Kepler,
Zong Weikai +4 more
doaj +1 more source