Results 41 to 50 of about 532,841 (292)
The rotational broadening and the mass of the donor star of GRS 1915+105 [PDF]
Astron.Astrophys. 414 (2004) L13-L16, 2003 The binary parameters of the microquasar GRS 1915+105 have been determined by the detection of Doppler-shifted 12CO and 13CO lines in its K-band spectrum (Greiner et al., 2001, Nature, 414, 522). Here, we present further analysis of the same K-band VLT spectra and we derive a rotational broadening of the donor star of V sin i=26+-3 km/s from the 12CO ...
arxiv +1 more source
Eclipsing Binaries in the OGLE Variable Star Catalog.II.Light Curves of the W UMA-Type Systems in Baade's Window [PDF]
, 1996 Light curves of the contact systems visible in the direction of Baade's Window have been analyzed using the first coefficients of the Fourier representation. The results confirm that the geometric contact between components is usually weak.
S. Rucinski
semanticscholar +1 more source
The Wind Velocities Driven by Alfven Waves in 31 CYG [PDF]
Journal of Astronomy and Space Sciences, 1991 31 Cyg is a ζ Aur-type eclipsing long-period binary composed a K supergiant and a hot main sequence star. Superginats have massive cool winds with low terminal velocities, and it is generally believed that supergiant's winds are driven by Alfven waves ...
Kyung-Mee Kim, Kyu-Hong Choi
doaj
INVESTIGATION OF COMPONENTS OF THE BINARY SYSTEM 38 PER
Odessa Astronomical Publications, 2017 Radial velocities VT of components of the binary system 38 Per are measured using high resolution and high signal / noise ratio spectra. The orbital elements were updated on the basis of these data and early published measurements of Vr.
L. S. Lyubimkov +3 more
doaj +1 more source
Revised Stellar Parameters for V471 Tau, A Post-common Envelope Binary in the Hyades [PDF]
, 2021 V471 Tau is a post-common-envelope binary consisting of an eclipsing DA white dwarf and a K-type main-sequence star in the Hyades star cluster. We analyzed publicly available photometry and spectroscopy of V471 Tau to revise the stellar and orbital parameters of the system.
arxiv +1 more source
THE MASSIVE STAR-FORMING REGION CYGNUS OB2. II. INTEGRATED STELLAR PROPERTIES AND THE STAR FORMATION HISTORY [PDF]
Proceedings of the International Astronomical Union, 2009 Cygnus OB2 is the nearest example of a massive star-forming region (SFR), containing over 50 O-type stars and hundreds of B-type stars. We have analyzed the properties of young stars in two fields in Cyg OB2 using the recently published deep catalog of ...
N. Wright, J. Drake, J. Drew, J. Vink
semanticscholar +1 more source
3D Radiative MHD Simulations of Starspots [PDF]
Astrophysical Journal, 2020 There are no direct spatially resolved observations of spots on stars other than the Sun, and starspot properties are inferred indirectly through lightcurves and spectropolarimetric data. We present the first self-consistent 3D radiative MHD computations
Mayukh Panja, R. Cameron, S. Solanki
semanticscholar +1 more source
X-ray sources in regions of star formation. II - The pre-main-sequence G star HDE 283572
, 1987 This paper reports the detection of HDE 283572, a ninth-magnitude G star 8 arcmin south of RY Tau, as a bright X-ray source. The observations reveal this object to be a fairly massive (about 2 solar masses) pre-main-sequence star associated with the ...
F. Walter +9 more
semanticscholar +1 more source
The secondary star and distance of the polar V1309 Ori [PDF]
, 2006 The first phase-resolved JHK light curves of the eclipsing polar (AM Herculis binary) V1309 Ori are presented and interpreted. We separate the contributions from the secondary star and from other sources with the aim of determining a photometric distance.
Bailey +26 more
core +2 more sources
X-Ray Emissions from Accreting White Dwarfs: A Review [PDF]
, 2017 Interacting binaries in which a white dwarf accretes material from a companion—cataclysmic variables (CVs) in which the mass donor is a Roche-lobe filling star on or near the main sequence, and symbiotic stars in which the mass donor is a late type giant—
K. Mukai
semanticscholar +1 more source