Results 61 to 70 of about 4,387 (203)
New Subdwarf B Star Periods [PDF]
, 2003 4 pages, 2 figures. Uses CRCKAPB.sty. To appear in the Proceedings of the XIII European Workshop on White Dwarfs. NATO Science Series II, Kluwer Academic Publishers.
Morales-Rueda, L. +3 more
openaire +2 more sources
Origin and pulsation of hot subdwarfs [PDF]
Proceedings of the International Astronomical Union, 2013 AbstractWe briefly introduce hot subdwarfs and their evolutionary status before discussing the different types of known pulsators in more detail. Currently, at least six apparently distinct types of variable are known among hot subdwarfs, encompassing p- as well as g-mode pulsators and objects in the Galactic field as well as in globular clusters. Most
Randall, Suzanna K +4 more
openaire +1 more source
Evolutionary modelling of subdwarf B stars using mesa with the predictive mixing and convective pre-mixing schemes [PDF]
, 2020 Results of evolutionary modelling of subdwarf B stars are presented. For the first time, we explore the core and near-core mixing in the subdwarf B stars using new algorithms available in the MESA code: the predictive mixing scheme and the convective ...
J. Ostrowski +3 more
semanticscholar +1 more source
EVR-CB-004: An Inflated Hot Subdwarf O Star + Unseen WD Companion in a Compact Binary Discovered with the Evryscope [PDF]
Astrophysical Journal, 2020 We present the discovery of EVR-CB-004, a close binary with a remnant stellar core and an unseen white dwarf (WD) companion. The analysis in this work reveals that the primary is potentially an inflated hot subdwarf (sdO) and more likely is a rarer post ...
J. Ratzloff +12 more
semanticscholar +1 more source
The Formation of Subdwarf B Stars [PDF]
International Astronomical Union Colloquium, 2002 AbstractWe performed full binary evolution calculations and carried out binary population synthesis studies in order to investigate the formation of subdwarf B (sdB) stars via the channels of stable Roche lobe overflow (RLOF), common envelope ejection and helium white dwarf mergers. Our model is successful in the explanation of observational properties
Han, Z +4 more
openaire +2 more sources
The population of hot subdwarf stars studied with Gaia [PDF]
Astronomy & Astrophysics, 2018 Based on data from the ESA Gaia Data Release 2 (DR2) and several ground-based, multi-band photometry surveys we have compiled an all-sky catalogue of 39 800 hot subluminous star candidates selected in Gaia DR2 by means of colour, absolute magnitude, and ...
S. Geier +3 more
semanticscholar +1 more source
A search for variable subdwarf B stars in TESS full frame images – I. Variable objects in the southern ecliptic hemisphere [PDF]
, 2020 We report the results of our search for pulsating subdwarf B stars in Full Frame Images, sampled at 30 min cadence and collected during Year 1 of the TESS mission. Year 1 covers most of the southern ecliptic hemisphere.
S. K. Sahoo +12 more
semanticscholar +1 more source
, 1962 In this paper we present the results obtained from the numerical integration of the equations for the case of subdwarfs with masses comparable and somewhat larger than that of the Sun.
Carlos M. Varsavsky +2 more
openalex +2 more sources
LS IV — 14°116 : A Time-Resolved Spectroscopic Study
Open Astronomy, 2017 LSIV-14 116 is a very unusual subdwarf B star. It pulsates non-radially with high-order g-modes, these pulsations are unexpected and unexplained, as the effective temperature is 6 000K hotter than the blue edge of the hot subdwarf g-mode instability ...
Martin Pamela, Jeffery C. Simon
doaj +1 more source
Finding New Hot Subdwarf Stars in SDSS Images
The Astronomical JournalHot subdwarf stars, located at the end of the blue horizontal branch, have a burning helium core, and are crucial for studying stellar structure. Currently, the number of known hot subdwarf star is relatively small.
Jiangchuan Zhang +8 more
doaj +1 more source