Hot subdwarfs from the surviving companions of the white dwarf + main-sequence channel of Type Ia supernovae [PDF]
, 2021 Some surviving companions of type Ia supernovae (SNe Ia) from the white-dwarf + main-sequence (WD + MS) channel may evolve to hot subdwarfs. In this paper, we preformed stellar evolution calculations for surviving companions of close WD +MS systems in ...
Xiangcun Meng, Yang Luo
semanticscholar +1 more source
WISEA J041451.67–585456.7 and WISEA J181006.18–101000.5: The First Extreme T-type Subdwarfs? [PDF]
Astrophysical Journal, 2020 We present the discoveries of WISEA J041451.67−585456.7 and WISEA J181006.18−101000.5, two low-temperature (1200–1400 K), high proper motion T-type subdwarfs. Both objects were discovered via their high proper motion (>0.″5 yr−1); WISEA J181006.18−101000.
A. Schneider +22 more
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Phases of Mass Transfer from Hot Subdwarfs to White Dwarf Companions and Their Photometric Properties [PDF]
Astrophysical Journal, 2021 Binary systems of a hot subdwarf B (sdB) star + a white dwarf (WD) with orbital periods less than 2–3 hr can come into contact due to gravitational waves and transfer mass from the sdB star to the WD before the sdB star ceases nuclear burning and ...
E. Bauer, T. Kupfer
semanticscholar +1 more source
Wide companions to M and L subdwarfs with Gaia and the Virtual Observatory [PDF]
Astronomy & Astrophysics, 2021 Aims. The aim of the project is to identify wide common proper motion companions to a sample of spectroscopically confirmed M and L metal-poor dwarfs (also known as subdwarfs) to investigate the impact of metallicity on the binary fraction of low-mass ...
J. Gonz'alez-Payo +5 more
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A Robust Identification Method for Hot Subdwarfs Based on Deep Learning
Astrophysical Journal Supplement Series, 2022 Hot subdwarf stars are a particular type of star that is crucial for studying binary evolution and atmospheric diffusion processes. In recent years, identifying hot subdwarfs by machine-learning methods has become a hot topic, but there are still ...
Lei Tan +7 more
semanticscholar +1 more source
Post-merger evolution of double helium white dwarfs and distribution of helium-rich hot subdwarfs [PDF]
, 2021 The mergers of double helium white dwarfs are believed to form isolated helium-rich hot subdwarfs. Observation shows that the helium-rich hot subdwarfs can be divided into two subgroups based on whether the surface is carbonrich or carbon-normal.
Jinlong Yu, Xianfei Zhang, G. Lü
semanticscholar +1 more source
Kinematics of nearby Subdwarfs [PDF]
Astrophysics and Space Science, 1999 Latex, 4 pages, 6 figures. To appear in the proceedings of the `Galaxy Evolution' conference held in Meudon, September, 21 - 25 ...
Fuchs, B., Jahreiss, H., Wielen, R.
openaire +2 more sources
The subdwarf luminosity function [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 Using data from the Sloan Digital Sky Survey Early Data Release and SuperCOSMOS Sky Survey scans of POSS-I plates we identify a sample of 2600 subdwarfs using reduced proper motion methods and strict selection criteria. This forms one of the largest and most reliable samples of candidate subdwarfs known, and enables us to determine accurate luminosity ...
Digby, Andrew P. +4 more
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The SALT survey of helium-rich hot subdwarfs: methods, classification, and coarse analysis [PDF]
Monthly notices of the Royal Astronomical Society, 2020 A medium- and high-resolution spectroscopic survey of helium-rich hot subdwarfs is being carried out using the Southern African Large Telescope (SALT).
Simon Jeffery, B. Miszalski, E. Snowdon
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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
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