搜索结果: 1-14 共查到“天文学 cyg x-1”相关记录14条 . 查询时间(0.079 秒)
The fate of Cyg X-1: an empirical limit on BH-NS merger rate
Cyg X-1:empirical limit BH-NS merger rate
2011/10/12
The recent distance determination allowed precise estimation of the orbital parameters of Cyg X-1, which contains a massive 14.8 Msun BH with a 19.2 Msun O star companion. This system appears to be th...
Spectral and Timing Studies of Cyg X-1 in the Low/Hard State with Suzaku
black hole physics — accretion — stars: individual (Cygnus X-1)—X- ray:binaries
2011/10/11
From 2005 to 2009, 25 observations of Cyg X-1 were performed with Suzaku, achieving a total exposure of 446 ks. In all observations, the source was found in the low/hard state, while the 1.5--12.0 keV...
The Microquasar Cyg X-1: A Short Review
accretion, accretion disks – black hole physics – X-rays:binaries
2011/10/8
We review the spectral properties of the black hole candidate Cygnus X-1. Specifically, we discuss two recent sets of multi-satellite observations. One comprises a 0.5-500 keV spectrum, obtained with ...
Marginally low mass ratio close binary system V1191 Cyg
Marginally ratio close binary V1191 Cyg
2011/9/27
In this study, we present photometric and spectroscopic variations of the extremely small mass ratio ($q\simeq 0.1$) late-type contact binary system \astrobj{V1191 Cyg}. The parameters for the hot and...
The 2010 nova outburst of the symbiotic Mira V407 Cyg
Stars novae – Stars symbiotic stars – Miras
2010/11/10
The nova outburst experienced in 2010 by the symbiotic binary Mira V407 Cyg has been extensively studied at optical and infrared wavelengths with both photometric and spectroscopic observations. This ...
Archival observations from the Very Large Array (VLA) at frequencies between 1.4 GHz and 43
GHz of the 6.6-day O6.5-7+O5.5-6 binary Cyg OB2 #5 over 20 years are re-examined. The aim is to determine t...
Time-resolved spectroscopy of q cyg。
Multiwavelength variability in the symbiotic nova v1016 cyg
Multiwavelength variability symbiotic nova v1016 cyg
2009/6/17
Multiwavelength variability in the symbiotic nova v1016 cyg。
Long-term variability in the quiescent x-ray transient v404 cyg
Long-term variability quiescent x-ray transient v404 cyg
2009/6/17
Long-term variability in the quiescent x-ray transient v404 cyg。
Ubv photometry of cyg x-1 from 1996 to 2003。
The cataclysmic variable V751 cyg at the eye of the pelican nebula：evidence of a circumstellar ring?
cataclysmic variable circumstellar ring pelican nebula
2009/6/11
The cataclysmic variable V751 cyg at the eye of the pelican nebula：evidence of a circumstellar ring?
Spectral Measurements of Cyg X-3: A Thermal Source Embedded in Hot Plasma within a Cold Shell
Low mass X-ray binaries X-ray sources Cyg X-3
2009/5/19
The attempts at unified model fitting to explain the spectral
variations in Cyg X-3 suggest equally probable fits with a combination of
an absorbed blackbody and a separately absorbed power law with...
Velocity Curve Studies of Spectroscopic Binary Stars V380 Cygni, V401 Cyg, V523 Cas, V373 Cas and V2388 Oph
Stars binaries eclipsing—stars binaries spectroscopic
2010/9/15
Using measured radial velocity data of five double lined spectroscopic binary systems V380 Cygni, V401 Cyg, V523 Cas, V373 Cas and V2388 Oph, we find corresponding orbital and spectroscopic elements v...
IDENTIFICATION OF PHASE-INDEPENDENT SPECTRAL LINES IN CLOSE BINARY V455 CYG：I. TELLURIC
Line identi¯ cation binaries spectroscopic-Stars individual V455 Cyg
2009/2/17
Spectroscopic observations of close binary star V455 Cygni reveal
many lines that originate in interstellar and circumstellar medium and the atmo-
sphere of the Earth; we found over two hundred such...