Results 61 to 70 of about 1,042,797 (116)
Optical Sources Near the Bright X-Ray Source in NGC 1073 [PDF]
Astrophys.J. 629 (2005) 233-238, 2005 New HST observations show that the bright X-ray source in the face-on spiral galaxy NGC 1073 is located near a ring of recent star formation with an age of 8-16 Myr. This strengthens the association of X-ray sources in spiral galaxies emitting near or above the Eddington limit for a 20 solar mass black hole with recent star formation events.
arxiv +1 more source
Near-infrared spectroscopy of 20 new Chandra sources in the Norma Arm [PDF]
A&A 568, A54 (2014), 2014 We report on CTIO/NEWFIRM and CTIO/OSIRIS photometric and spectroscopic observations of 20 new X-ray (0.5-10 keV) emitters discovered in the Norma Arm Region Chandra Survey (NARCS). NEWFIRM photometry was obtained to pinpoint the near-infrared counterparts of NARCS sources, while OSIRIS spectroscopy was used to help identify 20 sources with possible ...
arxiv +1 more source
Neutron Stars in X-ray Binaries and their Environments [PDF]
Journal of Astrophysics and Astronomy, 2017, Vol 38, Issue 3, 39, 2017 Neutron stars in X-ray binary systems are fascinating objects that display a wide range of timing and spectral phenomena in the X-rays. Not only parameters of the neutron stars, like magnetic field strength and spin period evolve in their active binary phase, the neutron stars also affect the binary systems and their immediate surroundings in many ways.
arxiv +1 more source
On the universal X-ray luminosity function of binary X-ray sources in galaxies [PDF]
Astron.Lett. 29 (2003) 372-373, 2002 The empirically determined universal power-law shape of X-ray luminosity function of high mass X-ray binaries in galaxies is explained by fundamental mass-luminosity and mass-radius relations for massive stars.
arxiv +1 more source
The Superluminal Source GRS 1915+105: A High-Mass X-Ray Binary?
, 1997 We obtained K-band (2.0-2.5 μm) infrared spectra of the visually obscured superluminal source GRS 1915+105 at three different epochs of 1995, at times when it was detected as a hard X-ray source.
I. Mirabel +4 more
semanticscholar +1 more source
The M Supergiant High Mass X-Ray Binary 4U 1954+31 [PDF]
, 2020 The X-ray binary 4U 1954+31 has been classified as a Low Mass X-ray Binary (LMXB) containing a M giant and a neutron star (NS). It has also been included in the rare class of X-ray symbiotic binaries (SyXB). The Gaia parallax, infrared colors, spectral type, abundances, and orbital properties of the M star demonstrate that the cool star in this system ...
arxiv +1 more source
Understanding the X-ray luminosity function of high mass X-ray binaries [PDF]
, 2010 High mass X-ray binary luminosity function (XLF) is an important tool for studying binary evolution processes and also the mass loss and consequent evolution in massive stars. We calculate the XLF for neutron star binaries using the standard scenario for formation and evolution of these systems.
arxiv +1 more source
Properties of the optical component stars in X-ray binary systems [PDF]
arXiv, 2023 We collected a total of 4,058 X-ray binary stars, out of which 339 stars had three atmospheric parameters for optical companions from Gaia and LAMOST, while 264 stars had masses and radii of optical companions determined using stellar evolution models. We conducted a thorough discussion on the reliability of each parameter.
arxiv
Long-term optical variability of high-mass X-ray binaries. II. Spectroscopy [PDF]
A&A 590, A122 (2016), 2016 We present the results of our monitoring program to study the long-term variability of the Halpha line in high-mass X-ray binaries. We have carried out the most complete optical spectroscopic study of the global properties of high-mass X-ray binaries so far with the analysis of more than 1100 spectra of 20 sources.
arxiv +1 more source
A Population of Ultraluminous X-ray Sources with An Accreting Neutron Star [PDF]
, 2015 Most ultraluminous X-ray sources (ULXs) are believed to be X-ray binary systems, but previous observational and theoretical studies tend to prefer a black hole rather than a neutron star accretor. The recent discovery of 1.37 s pulsations from the ULX M82 X-2 has established its nature as a magnetized neutron star.
arxiv +1 more source