scholarly journals Circumstellar emission in Be/X-ray binaries of the Magellanic Clouds and the Milky Way

2012 ◽  
Vol 539 ◽  
pp. A114 ◽  
Author(s):  
M. S. Riquelme ◽  
J. M. Torrejón ◽  
I. Negueruela
Keyword(s):  
Milky Way ◽  
Magellanic Clouds ◽  
X Ray ◽  
X Ray Binaries

Transient X-ray Binaries in the Magellanic Clouds and Milky Way

2017 ◽  
Vol 14 (S339) ◽  
pp. 127-130
Author(s):  
P. C. Charles ◽  
D. Buckley ◽  
D. Mata Sánchez ◽  
P. Meintjes ◽  
A. Rajoelimanana ◽  
...  
Keyword(s):  
Neutron Stars ◽  
White Dwarfs ◽  
Milky Way ◽  
Field Monitoring ◽  
Magellanic Clouds ◽  
Wide Field ◽  
X Ray ◽  
X Ray Binaries

AbstractThis contribution gave three examples of X-ray transients in the Magellanic Clouds and the Milky Way that have been observed as part of the SALT Transients Large Programme. The transients (SMC X-3, MAXI J1957+032 and ASASSN-16oh) have been triggered from both space-based wide-field monitoring facilities (Swift/XRT, MAXI) and ground-based ones (ASASSN, the All Sky Automated Survey for SN), providing insights into the physics of super-Eddington accretion onto neutron stars and white dwarfs, and also into the long-term properties of accreting millisecond X-ray pulsars.

scholarly journals Properties of X-ray binaries in the Magellanic Clouds from RXTE and Chandra observations

2008 ◽  
Vol 4 (S256) ◽  
pp. 361-366 ◽  
Author(s):  
R. H. D. Corbet ◽  
M. J. Coe ◽  
K. E. McGowan ◽  
M. P. E. Schurch ◽  
L. J. Townsend ◽  
...  
Keyword(s):  
Neutron Star ◽  
Milky Way ◽  
Magellanic Clouds ◽  
Light Curves ◽  
X Ray ◽  
Timing Information ◽  
Monitoring Programs ◽  
Extended Duration ◽  
X Ray Binaries

AbstractThe X-ray binary population of the SMC is very different from that of the Milky Way consisting, with one exception, entirely of transient pulsating Be/neutron star binaries. We have now been monitoring these SMC X-ray pulsars for over 10 years using the Rossi X-ray Timing Explorer with observations typically every week. The RXTE observations have been complemented with surveys made using the Chandra observatory. The RXTE observations are non-imaging but enable detailed studies of pulsing sources. In contrast, Chandra observations can provide precise source locations and detections of sources at lower flux levels, but do not provide the same timing information or the extended duration light curves that RXTE observations do. We summarize the results of these monitoring programs which provide insights into both the differences between the SMC and the Milky Way, and the details of the accretion processes in X-ray pulsars.

scholarly journals IUE Studies of Luminous X-Ray Binaries

1983 ◽  
Vol 6 ◽  
pp. 648-648
Author(s):  
J.B. Hutchings
Keyword(s):  
Magellanic Clouds ◽  
Thick Shell ◽  
High Luminosity ◽  
Uv Spectrum ◽  
X Ray ◽  
Unique Object ◽  
The Future ◽  
Orbit Inclination ◽  
Supercritical Accretion ◽  
X Ray Binaries

IUE has been used to study 11 high luminosity X-ray binaries, of which 3 are in the Magellanic Clouds. In the supergiant systems, X-ray ionisation bubbles have been found in most cases, leading to a greater understanding of the winds and accretion processes. Further studies of precessing objects such as LMC X-4 with IUE and ST are clearly of considerable interest, relating to X-ray heating and blanketing. Detailed studies of the Cyg X-l ionisation bubble may resolve the long standing puzzle of its orbit inclination and masses. UV continua have furnished valuable information on extinction, temperatures and luminosities, and the presence of non-stellar (i.e. disk) luminosity. Here too, more detailed studies are clearly indicated for the future. A unique object of interest is the LMC transient 0538-66 whose UV spectrum has quasarlike lines and luminosity which varies oppositely to the visible. This may be a case of supercritical accretion generating an optically thick shell (“disk”) about the pulsar.

scholarly journals X-ray Binaries in the Milky Way and Other Galaxies

2003 ◽  
Vol 3 (S1) ◽  
pp. 257-269 ◽  
Author(s):  
Hans-Jakob Grimm ◽  
Marat Gilfanov ◽  
Rashid Sunyaev
Keyword(s):  
Milky Way ◽  
X Ray ◽  
X Ray Binaries

scholarly journals Spectroscopy of Stellar X-ray Sources in the Magellanic Clouds

1984 ◽  
Vol 108 ◽  
pp. 305-312
Author(s):  
J. B. Hutchings
Keyword(s):  
Black Hole ◽  
Magellanic Cloud ◽  
Active Galaxies ◽  
Magellanic Clouds ◽  
Dwarf Stars ◽  
X Ray ◽  
Preliminary Comparison ◽  
The Galaxy ◽  
Optical Identifications ◽  
X Ray Binaries

In the Magellanic Clouds, about 75 candidate stellar X-ray sources have been detected. Most of these positions have now been investigated and optical identifications made for ~ 50%. The majority of sources are foreground dwarf stars or background active galaxies. Detailed investigations exist for 3 SMC sources and 6 LMC sources. It is possible to make a preliminary comparison with the population of galactic X-ray sources. The Magellanic Cloud X-ray binaries have a number of unique or remarkable properties and the most important ones are presented and discussed. These include the most rapid pulsars (SMC X-1, 0538–66), the possible precessing disk in LMC X-4, and the black hole candidates LMC X-3, LMC X-1. The properties of these objects relate to the evolution of stars in the Magellanic Clouds and how it differs from the Galaxy.

scholarly journals The X-ray stellar population of the LMC

2008 ◽  
Vol 4 (S256) ◽  
pp. 20-29 ◽  
Author(s):  
Yaël Nazé
Keyword(s):  
Stellar Population ◽  
Main Sequence ◽  
Massive Stars ◽  
High Energy ◽  
Magellanic Clouds ◽  
X Rays ◽  
X Ray ◽  
Energy Domain ◽  
X Ray Binaries

AbstractIn the study of stars, the high energy domain occupies a place of choice, since it is the only one able to directly probe the most violent phenomena: indeed, young pre-main sequence objects, hot massive stars, or X-ray binaries are best revealed in X-rays. However, previously available X-ray observatories often provided only crude information on individual objects in the Magellanic Clouds. The advent of the highly efficient X-ray facilities XMM-Newton and Chandra has now dramatically increased the sensitivity and the spatial resolution available to X-ray astronomers, thus enabling a fairly easy determination of the properties of individual sources in the LMC.

scholarly journals A Survey of X-ray Point Sources in the Magellanic Clouds

1999 ◽  
Vol 192 ◽  
pp. 100-103
Author(s):  
A. P. Cowley ◽  
P. C. Schmidtke ◽  
V. A. Taylor ◽  
T.K. McGrath ◽  
J. B. Hutchings ◽  
...  
Keyword(s):  
Stellar Population ◽  
Population Based ◽  
Magellanic Clouds ◽  
Point Sources ◽  
High Mass ◽  
Be Stars ◽  
X Ray ◽  
The Galaxy ◽  
Low Mass ◽  
X Ray Binaries

In this study we compare the global populations of stellar X-ray sources in the LMC, SMC, and the Galaxy. After removing foreground stars and background AGN from the samples, the relative numbers of the various types of X-ray point sources within the LMC and SMC are similar, but differ markedly from those in the Galaxy. The Magellanic Clouds are rich in high-mass X-ray binaries (HMXB), especially those containing rapidly rotating Be stars. However, the LMC and SMC both lack the large number of low-mass X-ray binaries (LMXB) found in the Milky Way, which are known to represent a very old stellar population based on their kinematics, chemical composition, and spatial distribution.

scholarly journals Be/X-Ray Binaries with Black Holes in the Galaxy and in the Magellanic Clouds

2014 ◽  
Vol 1 (1) ◽  
pp. 175-180 ◽  
Author(s):  
Janusz Ziolkowski
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Neutron Star ◽  
Magellanic Clouds ◽  
X Ray ◽  
The Galaxy ◽  
X Ray Binaries ◽  
Successful Candidate

I will start with the statistics indicating that the objects named in the title of my talk are either non-existing or very elusive to detect (not a single such object is known against 119 known Be/neutron star X-ray binaries). After brief reviewing of the properties of Be/X-ray binaries I discuss several objects that were proposed as the long sought for candidates for Be/black hole X-ray binaries. After three unsuccessful candidates (LS I +61° 303, LS 5039 and MAXI J1836-194), a successful candidate (AGL J2241+4454/MWC 656) was finally, very recently, announced.

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