Results 21 to 30 of about 66 (62)
A New Route to Massive Hot Subdwarfs: Common Envelope Ejection from Asymptotic Giant Branch Stars
The Astrophysical JournalThe hot subdwarf O/B stars (sdO/Bs) are known as extreme horizontal branch stars, which is of great importance in stellar evolution theory. The sdO/Bs are generally thought to have a helium-burning core and a thin hydrogen envelope ( M _env < 0.02 M _⊙ ).
Zhenwei Li +7 more
doaj +1 more source
The Astrophysical Journal Supplement SeriesWe present a homogeneous spectroscopic analysis of 2817 single-lined hot subdwarf candidates and 178 composite spectra hot subdwarf binary candidates observed by the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) and selected from two
Luo Yangping, Jiajun Hu
doaj +1 more source
Spitzer Studies of Ultracool Subdwarfs: Metal-poor Late-type M, L and T Dwarfs
, 2005 Recent discoveries from red optical proper motion and wide-field near-infrared surveys have uncovered a new population of ultracool subdwarfs, metal-poor stars and brown dwarfs extending into the late-type M, L and possibly T spectral classes. These objects are among the first low-mass stars and brown dwarfs formed in the Galaxy, and are valuable ...
openaire +2 more sources
The Astrophysical Journal Supplement SeriesWe present a catalog of 71,364 pointlike UV sources with Sloan Digital Sky Survey (SDSS) photometry and GALEX far-UV (FUV)−near-UV (NUV) ≤0.1 mag.
Luciana Bianchi
doaj +1 more source
A Metallicity Classification System for T Subdwarfs
We present a metallicity classification system for T dwarfs based on previously identified metal-poor brown dwarfs and new discoveries made by the Backyard Worlds: Planet 9 project. We define three metallicity classes in the near-infrared to augment the current dwarf sequence: mild subdwarfs (d/sdT), subdwarfs (sdT), and extreme subdwarfs (esdT), with ...
openaire +1 more source
Accurate mass and radius determinations of a cool subdwarf in an eclipsing binary. [PDF]
Nat Astron, 2019 Rebassa-Mansergas A +6 more
europepmc +1 more source
A Kinematically Cold Structure of Candidate Young OB Stars toward the Anticenter. [PDF]
Astrophys J, 2019 Casetti-Dinescu DI, Girard TM.
europepmc +1 more source
2MASS J035523.37+113343.7: A YOUNG, DUSTY, NEARBY, ISOLATED BROWN DWARF RESEMBLING A GIANT EXOPLANET. [PDF]
Astron J, 2013 Faherty JK +4 more
europepmc +1 more source
Globular clusters, Hipparcos, and the age of the galaxy. [PDF]
Proc Natl Acad Sci U S A, 1998 Reid N.
europepmc +1 more source
Models of very-low-mass stars, brown dwarfs and exoplanets. [PDF]
Philos Trans A Math Phys Eng Sci, 2012 Allard F, Homeier D, Freytag B.
europepmc +1 more source