Results 111 to 120 of about 4,387 (203)

A New Class of Large-amplitude Radial-mode Hot Subdwarf Pulsators

Astrophysical Journal, 2019
Using high-cadence observations from the Zwicky Transient Facility at low Galactic latitudes, we have discovered a new class of pulsating, hot compact stars.
T. Kupfer, E. Bauer, K. Burdge, E. Bellm, L. Bildsten, J. Fuller, J. Hermes, S. Kulkarni, T. Prince, J. Roestel, R. Dekany, D. Duev, M. Feeney, M. Giomi, M. Graham, S. Kaye, R. Laher, F. Masci, Michael E. Porter, R. Riddle, D. Shupe, Roger M. Smith, M. Soumagnac, P. Szkody, C. Ward   +24 more
semanticscholar   +1 more source

On the formation of single and binary helium-rich subdwarf O stars [PDF]

, 2010
Stephen Justham, Philipp Podsiadlowski, Zhanwen Han   +2 more
openalex   +1 more source

The OB-type subdwarf HD 149382 and the nature of the subdwarf B stars

The Astrophysical Journal, 1975
High-dispersion spectra and monochromatic continuum measures of the subdwarf OB star HD 149382 have been obtained and analyzed to yield the atmospheric parameters T)=40,000 K, log g=5.8. Helium is deficient by a factor 10 compared to Population I. Sulfur is the only element, other than hydrogen and helium, observed in the blue spectrum of this object ...
B. Baschek, J. Norris
openaire   +1 more source

Model Spectra of Hot Subdwarfs for the Gaia Mission [PDF]

, 2008
L. Hindson, R. Napiwotzki, U. Heber, Michael Lemke   +3 more
openalex   +1 more source

A spectroscopic and proper motion search of Sloan Digital Sky Survey: red subdwarfs in binary systems [PDF]

, 2013
Z. H. Zhang, D. J. Pinfield, Ben Burningham, H. R. A. Jones, M. C. Gálvez-Ortiz, S. Catalán, R. L. Smart, Sébastien Lépine, J. R. A. Clarke, Ya. V. Pavlenko, D. N. Murray, M. K. Kuznetsov, A. C. Day-Jones, Jorge F.S. Gomes, Federico Marocco, Brigitta Sipőcz   +15 more
openalex   +1 more source

The first massive compact companion in a wide orbit around a hot subdwarf star [PDF]

, 2023
S. Geier, M. Dorsch, Harry Dawson, Ingrid Pelisoli, James Munday, T. R. Marsh, V. Schaffenroth, U. Heber   +7 more
openalex   +1 more source

Atomic diffusion in the atmosphere of Feige 86

Open Astronomy, 2017
We have revisited the ultraviolet and optical spectra of the blue horizontal branch star Feige 86. The new analysis finds the star cooler and more compact than previously determined. The IUE spectrum of Feige 86 holds numerous unidentified spectral lines
Németh Péter
doaj   +1 more source

Phases of Mass Transfer from Hot Subdwarfs to White Dwarf Companions [PDF]

, 2021
Evan B. Bauer, Thomas Kupfer
openalex  

Disentangling Composite Spectrum Hot Subdwarfs

, 2004
We give preliminary results from a spectroscopic study of composite spectrum hot subdwarfs (sd+late-type). We obtained spectra of a sample of hot subdwarfs selected from the "Catalogue of Spectroscopically Identified Hot Subdwarfs" on the basis of near-infrared photometry from the Two Micron All Sky Survey (2MASS). The sample consists of 20 photometric
Stark, M. A., Wade, Richard A.
openaire   +2 more sources

HST Observations of M Subdwarfs

, 2000
Accepted for PASP, 10 pages including figures and ...
Gizis, John E., Reid, I. Neill
openaire   +2 more sources