X-ray reflection in a sample of X-ray bright ultraluminous X-ray sources
نویسندگان
چکیده
منابع مشابه
Ultraluminous X-ray Sources
The Chandra X-Ray Observatory was used to image the collisional ring galaxy Arp 147 for 42 ks. We detect nine X-ray sources with luminosities in the range of (1.4–7) × 1039 erg s−1 (assuming that the sources emit isotropically) in or near the blue knots of star formation associated with the ring. A source with an X-ray luminosity of 1.4 × 1040 erg s−1 is detected in the nuclear region of the in...
متن کاملX-ray Monitoring of Ultraluminous X-ray Sources
X-ray monitoring observations were performed with the Swift observatory of the ultraluminous Xray sources Holmberg IX X-1, NGC 5408 X-1, and NGC 4395 X-2 and also of the nuclear X-ray source in NGC 4395. Holmberg IX X-1 remains in the hard X-ray spectral state as its flux varies by a factor of 7 up to an (isotropic) luminosity of 2.8 × 10 erg s. This behavior may suggest an unusually massive co...
متن کاملX-ray observations of ultraluminous X-ray sources
Ultraluminous X-ray sources (ULXs) are amongst the most intriguing of X-ray source classes. Their extreme luminosities greater than 10 erg s in the 0.3 – 10 keV band alone suggest either the presence of black holes larger than those regularly encountered in our own Galaxy (the Galactic centre excepted), or sources apparently radiating well above the Eddington limit. We review the insights affor...
متن کاملCompact X-ray sources: X-ray from self-reflection
X-ray has been an important scientific tool ever since its discovery in the 1890s. X-ray used to be generated by synchrotron machines, which are large and expensive devices. However, laser-based particle acceleration offers a way to reduce the size and cost of hard-X-ray sources. Scientists have now developed a simple scheme that produces a bright flash of hard-X-rays by using a single laser pu...
متن کاملUltraluminous X-ray Sources in Interacting Galaxies
I give a brief review of how X-rays from nearby galaxies are used as direct tracers of recent star formation. This leads to the conclusion that it is the most luminous point-like sources that are associated with star formation and that the majority of these are high-mass X-ray binaries. I then discuss a recent study that shows that ULXs are preferentially found in regions as young as or younger...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2010
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2009.16062.x