Results 71 to 80 of about 354,351 (369)

A ROSAT Survey of Contact Binary Stars [PDF]

open access: yesAstron.J.131:633-637,2006, 2005
Contact binary stars are common variable stars which are all believed to emit relatively large fluxes of x-rays. In this work we combine a large new sample of contact binary stars derived from the ROTSE-I telescope with x-ray data from the ROSAT All-Sky Survey (RASS) to estimate the x-ray volume emissivity of contact binary stars in the galaxy.
arxiv   +1 more source

Formation of Sco X-1 induced by anomalous magnetic braking of Ap/Bp stars

open access: yes, 2017
Sco X-1 is the brightest persistent X-ray in the sky. It is generally believed that Sco X-1 is a low-mass X-ray binary containing a neutron star accreting from a low-mass donor star where mass transfer is driven by the magnetic braking. However, the mass
Chen, Wen-Cong
core   +1 more source

Hard X-ray colours of neutron star and black hole low mass X-ray binaries with INTEGRAL [PDF]

open access: yesAdvances in Space Research, 2007
Paper from poster presentation at COSPAR meeting, Beijing, 2006.
Paltani, Stéphane   +11 more
openaire   +3 more sources

New Results for Two Optically Faint Low-Mass X-Ray Binary Systems [PDF]

open access: yes, 1997
We present optical photometry of the low-mass X-ray binary systems GX 349+2 (X1702-363) and Ser X-1 (X1837+049). Extensive VRI photometry of the faint optical counterpart (V = 18.4) to GX 349+2 reveals a period of 22.5 ± 0.1 hr and a half-amplitude of 0 ...
S. Wachter
semanticscholar   +1 more source

A Radio Pulsar/X-ray Binary Link [PDF]

open access: yes, 2009
Radio pulsars with millisecond spin periods are thought to have been spun up by transfer of matter and angular momentum from a low-mass companion star during an X-ray-emitting phase.
Archibald, Anne M.   +17 more
core   +3 more sources

A 2.15 hr ORBITAL PERIOD FOR THE LOW-MASS X-RAY BINARY XB 1832-330 IN THE GLOBULAR CLUSTER NGC 6652 [PDF]

open access: yes, 2012
We present a candidate orbital period for the low-mass X-ray binary (LMXB) XB 1832-330 in the globular cluster NGC 6652 using a 6.5 hr Gemini South observation of the optical counterpart of the system.
M. Engel   +4 more
semanticscholar   +1 more source

Analytical model of compact star in low-mass X-ray binary with de Sitter spacetime [PDF]

open access: yesResearch in Astronomy and Astrophysics, 2018
In this article, we suggest a Sitter model in favor of compact stars in low-mass X-ray binaries. Here, we have considered the presence of a cosmological constant (on a small scale) to investigate the stellar structure.
S. Molla   +3 more
semanticscholar   +1 more source

Isotropic star in low-mass X-ray binaries and X-ray pulsars

open access: yes, 2014
7 pages, 11 ...
Kalam, Mehedi   +2 more
openaire   +2 more sources

A CHANGE IN THE QUIESCENT X-RAY SPECTRUM OF THE NEUTRON STAR LOW-MASS X-RAY BINARY MXB 1659–29 [PDF]

open access: yesThe Astrophysical Journal, 2013
6 pages, 4 figures, accepted for publication in ...
Cackett, E.M.   +7 more
openaire   +5 more sources

NICER–NuSTAR Observations of the Neutron Star Low-mass X-Ray Binary 4U 1735–44 [PDF]

open access: yesThe Astrophysical Journal, 2020
Abstract We report on the first simultaneous Neutron Star Interior Composition Explore (NICER) and Nuclear Spectroscopic Telescope Array (NuSTAR) observations of the neutron star (NS) low-mass X-ray binary 4U 1735−44, obtained in 2018 August. The source was at a luminosity of ∼1.8 (D/5.6 kpc)2 × 1037 erg s−1 in the 0.4–30 keV band.
Peter Bult   +14 more
openaire   +8 more sources

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