Results 61 to 70 of about 130 (117)

Overview of the LAMOST survey in the first decade. [PDF]

Innovation (Camb), 2022
Yan H, Li H, Wang S, Zong W, Yuan H, Xiang M, Huang Y, Xie J, Dong S, Yuan H, Bi S, Chu Y, Cui X, Deng L, Fu J, Han Z, Hou J, Li G, Liu C, Liu J, Liu X, Luo A, Shi J, Wu X, Zhang H, Zhao G, Zhao Y.   +26 more
europepmc   +1 more source

A New Route to Massive Hot Subdwarfs: Common Envelope Ejection from Asymptotic Giant Branch Stars

The Astrophysical Journal
The 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, Yangyang Zhang, Hailiang Chen, Hongwei Ge, Dengkai Jiang, Jiangdan Li, Xuefei Chen, Zhanwen Han   +7 more
doaj   +1 more source

Toward 3D orbits of wide sdO/B binaries

Astronomy & Astrophysics
Hot subdwarf stars (sdO/Bs) are widely considered to be products of binary evolution. A significant fraction of them is found in long-period or wide binaries (P > 500 d) with main-sequence (MS) companions, likely resulting from a stable mass-transfer ...
Deshmukh K., Geier S., Sana H., Dawson H., Dorsch M., Frost A. J., Heber U., Kupfer T., Picco A., Vučković M.   +9 more
doaj   +1 more source

UOCS-XIX. A Multiwavelength Study of Open Cluster Trumpler 5: Cluster Properties and Exotic Populations

The Astronomical Journal
Trumpler 5 is a populous, intermediate-age (∼3 Gyr), metal-poor ([Fe/H] ∼ −0.4) open cluster, located at a distance of approximately ∼3050 pc. This is a well-studied cluster for its broadened main-sequence (MS) and blue straggler star (BSS) population ...
Komal Chand, Anju Panthi, Kaushar Vaidya
doaj   +1 more source

A Search for High-frequency Oscillations in TESS Cycle 7

The Astrophysical Journal Supplement Series
High-quality, short-cadence photometry from TESS enables the detection of rapid oscillators with unprecedented sensitivity. In this work, we conduct a homogeneous search for high-frequency variability using 20 s cadence light curves from TESS Cycle 7 ...
Guanda Huang, Xiaodian Chen, Shu Wang, Xiaobin Zhang, Licai Deng   +4 more
doaj   +1 more source

The evolution of a hot subdwarf: observations of the pulsating subdwarf B star Feige~48

, 2003
Since pulsating subdwarf B (sdBV or EC14026) stars were first discovered (Kilkenny et al, 1997), observational efforts have tried to realize their potential for constraining the interior physics of extreme horizontal branch (EHB) stars. Difficulties encountered along the way include uncertain mode identifications and a lack of stable pulsation mode ...
Reed, M. D., Kawaler, S. D., teams., the Whole Earth Telescope XCov 17 / 21 / 23   +2 more
openaire   +2 more sources

From main-sequence binary to blast: MESA modeling of the double-detonation progenitor PTF1 J2238+7430

Astronomy & Astrophysics
Context. Hot subdwarf B (sdB) stars in close binaries with white dwarf (WD) companions are potential progenitors of double-detonation thermonuclear supernovae.
Hernandez Mercedes S., Kupfer Thomas, Belloni Diogo, Schreiber Matthias R.   +3 more
doaj   +1 more source

Wide B-type hot subdwarf binaries

Astronomy & Astrophysics
Context. Long-period binary systems containing a B-type hot subdwarf (sdB) and a main sequence (MS) companion are thought to originate from binary interactions involving stable mass transfer from the red giant, which is the progenitor of the sdB, to the ...
Molina Francisco, Vos Joris, Bobrick Alexey, Vučković Maja   +3 more
doaj   +1 more source

Disk-regulated Mass Transfer between Rotating Nondegenerate Stars: Insights from Be and sdOB Binaries

The Astrophysical Journal
Mass transfer between nondegenerate stars is a fundamental but still poorly understood process in binary evolution. The commonly used rotationally limited accretion prescription in detailed binary evolution simulations that account for stellar rotation ...
Zepei Xing, Tassos Fragos, Vicky Kalogera, Seth Gossage, Kyle Akira Rocha, Emmanouil Zapartas   +5 more
doaj   +1 more source

Discovery of diffuse optical emission lines from the inner Galaxy: Evidence for LI(N)ER-like gas. [PDF]

Sci Adv, 2020
Krishnarao D, Benjamin RA, Haffner LM.
europepmc   +1 more source