Results 11 to 20 of about 6,437,155 (300)
Diffuse X-Ray Emission in the Cygnus OB2 Association [PDF]
, 2023 We present a large-scale study of diffuse X-ray emission in the nearby massive stellar association Cygnus OB2 as part of the Chandra Cygnus OB2 Legacy Program. We used 40 Chandra X-ray ACIS-I observations covering ∼1.0 deg2.
Prinja, R. K. +36 more
core +1 more source
Simulations of X-ray bursts and superbursts [PDF]
, 2015 Observations of neutron star in binary systems provide powerful constrains on the physics at the surface of neutron stars. During the accretion of matter from the companion star, periodic nuclear explosion are triggered in the outer layers of the neutron
Fehlmann, Sofie
core +1 more source
Probing the composition of sub-millisecond rotating compact stars by r-modes instability [PDF]
, 2012 We investigate the implications of the r-modes instability on the composition of a compact star rotating at a sub-millisecond period. In particular, the only viable astrophysical scenario for such an object, wich might present inside the Low Mass X-ray ...
Giuseppe Pagliara +3 more
core +1 more source
A possible nonthermal X-ray emission from γ Cas analogues stars
Open Astronomy, 2021 We analyze the archival XMM-Newton X-ray observations of 15 γ Cas analogue stars and two candidates for such objects. The EPIC spectra of the considered stars in the range of 0.2-8 keV were extracted and fitted by different models.
Ryspaeva Elizaveta B. +1 more
doaj +1 more source
Compact objects in active galactic nuclei and X-ray binaries [PDF]
, 2007 In this thesis I study the inner-most regions of Active Galactic Nuclei (AGN) using the reverberation mapping technique, and neutron star low-mass X-ray binaries in quiescence using X-ray observations. Using the 13-year optical monitoring data for the
Cackett, Edward M.
core +2 more sources
X-ray emission from massive stars: lessons learned and remaining mysteries [PDF]
, 2021 Nearly all types of massive stars are known to display X-ray emission at some level. Tremendous insight into this phenomenon has been gained thanks to the sensitivity of the current generation of X-ray satellites and X-ray observations are nowadays an ...
Rauw, Grégor
core +1 more source
The Astrophysical Journal Supplement Series, 2023 The young massive OB association Cygnus OB2, in the Cygnus X complex, is the closest (∼1400 pc) star-forming region to the Sun hosting thousands of young low-mass stars and up to 1000 OB stars, among which are some of the most massive stars known in our ...
M. G. Guarcello +6 more
doaj +1 more source
X-Ray Bursting Neutron Stars [PDF]
Symposium - International Astronomical Union, 1987 The maximum peak luminosity of the X-ray bursts from a burster is most likely interpreted as the Eddington luminosity of a helium-rich envelope surrounding a neutron star. If this interpretation is true, we can obtain a relation between the mass and the radius of the neutron star in terms of the maximum effective temperature of bursts.
openaire +1 more source
X-Ray Observations of Be Stars [PDF]
Symposium - International Astronomical Union, 1982 Be star binaries with neutron star companions are shown to constitute a major class of X-ray sources. Some general observational and interpretive techniques of X-ray astronomy are reviewed. Data for 12 Be/X-ray binary systems are summarized. The Be/X-ray binaries are found to be systematically wider systems, with lower-mass primaries, and with ...
Saul Rappaport +1 more
openaire +1 more source
XMM-Newton X-ray study of early type stars in the Carina OB1 association [PDF]
, 2007 <p><b>Aims:</b> X-ray properties of the stellar population in the Carina OB1 association are examined with special emphasis on early-type stars.
I. I. Antokhin +14 more
core +2 more sources