Primeval very low-mass stars and brown dwarfs. I. Six new L subdwarfs, classification and atmospheric properties [PDF]
, 2016 We have conducted a search for L subdwarf candidates within the photometric catalogues of the UKIRT Infrared Deep Sky Survey and Sloan Digital Sky Survey.
Z. Zhang +14 more
semanticscholar +1 more source
Discovery and analysis of three magnetic hot subdwarf stars: evidence for merger-induced magnetic fields [PDF]
, 2022 Magnetic fields can play an important role in stellar evolution. Among white dwarfs, the most common stellar remnant, the fraction of magnetic systems is more than 20 per cent.
I. Pelisoli +8 more
semanticscholar +1 more source
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
Hot subdwarfs: Small stars marking important events in stellar evolution: Ludwig Biermann Award Lecture 2014 [PDF]
, 2015 Hot subdwarfs are considered to be the compact helium cores of red giants which lost almost their entire hydrogen envelope. What causes this enormous mass loss is still unclear.
S. Geier
semanticscholar +1 more source
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
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
The Formation of Subdwarf A-type Stars [PDF]
The Astrophysical Journal, 2019 Abstract Subdwarf A-type stars (sdAs) are objects that have hydrogen-rich spectra with surface gravity similar to that of hot subdwarf stars but effective temperature below the zero-age horizontal branch. They are considered to be metal-poor main-sequence (MS) stars or extremely low-mass white dwarfs (ELM WDs).
Jinlong Yu +8 more
openaire +2 more sources
In Pursuit of the Least Luminous Galaxies
Advances in Astronomy, Volume 2010, Issue 1, 2010., 2010 The dwarf galaxy companions to the Milky Way are unique cosmological laboratories. With luminosities as low as 10−7LMW, they inhabit the lowest mass dark matter halos known to host stars and are presently the most direct tracers of the distribution, mass spectrum, and clustering scale of dark matter.
Beth Willman, Regina Schulte-Ladbeck
wiley +1 more source
Discovery of three magnetic helium-rich hot subdwarfs with SALT [PDF]
Astronomy & AstrophysicsMagnetic fields with strengths ranging from 300 to 500\,kG have recently been discovered in a group of four extremely similar helium-rich hot subdwarf (He-sdO) stars.
M. Dorsch +8 more
semanticscholar +1 more source
Asteroseismic Observations of Hot Subdwarfs
Frontiers in Astronomy and Space Sciences, 2021 There are a number of reasons for studying hot subdwarf pulsation; the most obvious being that these stars remain a poorly understood late-stage of stellar evolution and knowledge of their interior structure, which pulsation studies reveal, constrains ...
A. Lynas-Gray
semanticscholar +1 more source