Variability of ultraluminous X-ray sources in the Cartwheel Ring
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چکیده
منابع مشابه
Variability of ultraluminous X-ray sources in the Cartwheel Ring
The Cartwheel is one of the most outstanding examples of a dynamically perturbed galaxy where star formation is occurring inside the ring–like structure. In previous studies with Chandra, we detected 16 Ultra Luminous X-ray sources lying along the southern portion of the ring. Their Luminosity Function is consistent with them being in the high luminosity tail of the High Mass X-ray Binaries dis...
متن کاملIntermediate-mass black holes and ultraluminous X-ray sources in the Cartwheel ring galaxy
Chandra and XMM−Newton observations of the Cartwheel galaxy show∼ 17 bright X-ray sources ( > ∼ 5× 10 38 erg s), all within the gas-rich outer ring. We explore the hypothesis that these X-ray sources are powered by intermediate-mass black holes (IMBHs) accreting gas or undergoing mass transfer from a stellar companion. To this purpose, we run N -body/SPH simulations of the galaxy interaction wh...
متن کاملNonnuclear Hyper/Ultraluminous X-Ray Sources in the Starbursting Cartwheel Ring Galaxy
We report the Chandra/ACIS-S detection of more than 20 ultraluminous X-ray sources (ULXs, L0.5−10keV > ∼3 × 10 ergs s) in the Cartwheel collisional ring galaxy system, of which over a dozen are located in the outer active star-forming ring. A remarkable hyperluminous X-ray source (HLX, L0.5−10keV > ∼10 ergs s assuming isotropic radiation), which dominates the X-ray emission from the Cartwheel r...
متن کاملUltraluminous 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 Time and Spectral Variability as Probes of Ultraluminous X-ray Sources
Title of dissertation: X-RAY TIME AND SPECTRAL VARIABILITY AS PROBES OF ULTRALUMINOUS X-RAY SOURCES Dheeraj Ranga Reddy Pasham, Doctor of Philosophy, 2014 Dissertation directed by: Professor Coleman Miller Department of Astronomy A long-standing debate in the field of ultraluminous X-ray sources (ULXs: luminosities & 3×1039 ergs s) is whether these objects are powered by stellarmass black holes...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2006
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s174392130700508x