Astronomy & AstrophysicsCompact binaries containing hot subdwarfs and white dwarfs have the potential to evolve into a variety of explosive transients. These systems could also explain hypervelocity runaway stars such as US 708. We use the detailed binary evolution code MESA to
Abinaya Swaruba Rajamuthukumar +5 more
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The population of hot subdwarf stars studied with Gaia : I. The catalog of known hot subdwarf stars [PDF]
Astronomy & Astrophysics, 2017 In preparation for the upcoming all-sky data releases of the Gaia mission we compiled a catalogue of known hot subdwarf stars and candidates drawn from the literature and yet unpublished databases. The catalogue contains 5613 unique sources and provides multi-band photometry from the ultraviolet to the far infrared, ground based proper motions ...
S. Geier +7 more
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Optical spectroscopy of high proper motion stars: new M dwarfs within 10 pc and the closest pair of subdwarfs [PDF]
, 2006 We present spectra of 59 nearby stars candidates, M dwarfs and white dwarfs, pre-viously identified using high proper motion catalogues and the DENIS database.
C. Reylé +4 more
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A comprehensive search for hot subdwarf stars using Gaia and TESS [PDF]
Astronomy & AstrophysicsHot subdwarf B (sdB) stars are evolved, subluminous, helium-burning stars that most likely form when red giant stars loose their hydrogen envelope via interactions with close companions. They play an important role in our understanding of binary evolution, stellar atmospheres, and interiors.
J. Krzesiński +11 more
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Elusive hot stripped helium stars in the Galaxy I. Evolutionary stellar models in the gap between subdwarfs and Wolf-Rayet stars [PDF]
Astronomy & Astrophysics, 2023 Stellar evolution theory predicts the existence of He-core remnants of the primary components of intermediate-mass close binaries that lost most of their H/He envelopes due to the mass exchange. They are expected to be observed as (1-7) solar mass hot He-
L. Yungelson +5 more
semanticscholar +1 more source
Chemical Properties of the Local Disk and Halo. II. Abundances of 3745 M Dwarfs and Subdwarfs from Improved Model Fitting of Low-resolution Spectra [PDF]
Astrophysical Journal, 2022 We present a model-fit pipeline to determine the stellar parameters of M-type dwarfs, which is an improvement on our previous work described in Hejazi et al.
N. Hejazi, S. Lépine, T. Nordlander
semanticscholar +1 more source
Discovery of new TESS pulsating hot subdwarfs [PDF]
Astronomy & Astrophysics, 2022 Aims. This work is dedicated to a search for new pulsating hot subdwarfs in TESS photometric data which could have been missed in previous searches. Methods.
J. Krzesinski, L. Balona
semanticscholar +1 more source
Hot subdwarf B stars with neutron star components [PDF]
Astronomy & Astrophysics, 2020 Context. Subdwarf B stars (sdBs) play a crucial role in stellar evolution, asteroseismology, and far-UV radiation of early-type galaxies, and have been intensively studied with observation and theory. It has theoretically been predicted that sdBs with neutron star (NS) companions exist in the Galaxy, but none have been discovered yet.
You Wu +4 more
openaire +5 more sources
Spectral models for binary products: Unifying subdwarfs and Wolf-Rayet stars as a sequence of stripped-envelope stars [PDF]
Astronomy & Astrophysics, 2018 Stars stripped of their hydrogen-rich envelope through interaction with a binary companion are generally not considered when accounting for ionizing radiation from stellar populations, despite the expectation that stripped stars emit hard ionizing ...
Y. Götberg +6 more
semanticscholar +1 more source
An 18.9 min blue large-amplitude pulsator crossing the ‘Hertzsprung gap’ of hot subdwarfs [PDF]
Nature Astronomy, 2022 Blue large-amplitude pulsators (BLAPs) represent a mysterious class of hot stars pulsating in an unexpectedly extreme way. Here we report the discovery of an unusual BLAP at a short-lived phase that provides a new path to understand their physical ...
Jie Lin +30 more
semanticscholar +1 more source