Results 91 to 100 of about 10,468 (212)
X-ray Sources and their Optical Counterparts in the Globular Cluster M4
, 2004 We report on the Chandra X-ray Observatory ACIS-S3 imaging observation of the Galactic globular cluster M4 (NGC 6121). We detect 12 X-ray sources inside the core and 19 more within the cluster half-mass radius. The limiting luminosity of this observation
Anderson, S.F. +12 more
core +2 more sources
A New Window for Studying Intermediate Polars and Tilted Accretion Disk Precession
The Astrophysical JournalTV Col is a long-period eclipsing intermediate polar (IP) prototype star for the negative superhump (NSH) system. We investigate the eclipse minima, eclipse depth, and NSH amplitude based on TESS photometry.
Qi-Bin Sun +7 more
doaj +1 more source
What’s Cool About Hot Stars? Cataclysmic Variables in the Mid-Infrared [PDF]
, 2009 We review recent results from mid-infrared observations of cataclysmic variables with the Spitzer Space Telescope. In general, these observations have revealed mid-infrared excesses, above the level expected from the stellar and accretion components, in ...
Brinkworth, C. +6 more
core
The Astrophysical JournalCompact objects undergoing mass transfer exhibit significant (and double-peaked) H _α emission lines. Recently, new methods have been developed to identify black hole X-ray binaries and calculate their systematic parameters using H _α line parameters ...
Xinlin Zhao, Song Wang, Jifeng Liu
doaj +1 more source
V751 Cyg and V Sge as transient supersoft X-ray sources
, 1999 I review the observational evidence for luminous, soft X-ray emission during optical low-states in the two cataclysmic variables V751 Cyg and V Sge, and discuss the possible link to the canonical supersoft X-ray sources.Comment: 6 pages with newarcrc.sty;
Greiner, J.
core +2 more sources
Pole-On Cataclysmic Variables as Be Stars [PDF]
International Astronomical Union Colloquium, 1987 Cataclysmic-variable stars (CVs) are technically Be stars, since Balmer emission lines appear in their spectra. In general, CV spectra are so unusual that they are easily recognized. The main features are extremely broad, shallow hydrogen lines with broad, faint emission cores.
openaire +1 more source
Erupting Cataclysmic Variable Stars in the Nearest Globular Cluster, NGC 6397: Intermediate Polars?
, 2005 NGC 6397 is the closest globular cluster, and hence the ideal place to search for faint stellar populations such as cataclysmic variables (CVs). HST and Chandra observers have identified nine certain and likely CVs in this nearby cluster, including ...
A. Dieball +9 more
core +2 more sources
The Astrophysical Journal Supplement SeriesBased mainly on the months-long 2 minutes time-resolution light curves observed by the Transiting Exoplanet Survey Telescope (TESS) space mission of 48 eclipsing old novae and novalike variables (commonly referred to as NLs) selected from the Ritter ...
Albert Bruch
doaj +1 more source
The Photometric Period and Variability of the Cataclysmic Variable V849 Herculis (PG 1633+115)
, 2012 We report time-resolved photometry of the cataclysmic variable V849 Her, and measure a period of 0.1414 \pm 0.0030 days (3.394 \pm 0.072 hours). We also present photometry taken over several weeks in 2010 and 2011, as well as light curves from 1995 to ...
Ak +24 more
core +1 more source
Analysis of cataclysmic variable star energy distributions
The Astronomical Journal, 1982 I analyze spectrophotometry of cataclysmic variable stars covering the wavelength range 0.32--1.1 ..mu..m. The contributions due to the cool secondary star and the accretion disk are separated, subject to the requirement that the spectrum attributed to the accretion disk be ''physically plausible.'' The results for individual stars, which are largely ...
openaire +1 more source