Intermediate-mass black holes and ultraluminous X-ray sources in the Cartwheel ring galaxy
نویسندگان
چکیده
منابع مشابه
Intermediate-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 کاملVariability 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 کاملStellar-mass black holes and ultraluminous x-ray sources.
We review the likely population, observational properties, and broad implications of stellar-mass black holes and ultraluminous x-ray sources. We focus on the clear empirical rules connecting accretion and outflow that have been established for stellar-mass black holes in binary systems in the past decade and a half. These patterns of behavior are probably the keys that will allow us to underst...
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 کاملModels of Ultraluminous X-ray Sources with Intermediate-mass Black Holes
We have computed models for ultraluminous X-ray sources (“ULXs”) consisting of a black-hole accretor of intermediate mass (“IMBH”; e.g., ∼1000 M⊙) and a captured donor star. For each of four different sets of initial donor masses and orbital separations, we computed 30,000 binary evolution models using a full Henyey stellar evolution code. To our knowledge this is the first time that a populati...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2007
ISSN: 0035-8711
DOI: 10.1111/j.1365-2966.2007.12534.x