Results 31 to 40 of about 9,171,233 (161)
Classifying the Zoo of Ultraluminous X-ray Sources [PDF]
Chinese Journal of Astronomy and Astrophysics, 2005 Ultraluminous X-ray sources (ULXs) are likely to include different physical types of objects. We discuss some possible subclasses, reviewing the properties of a sample of ULXs recently observed by Chandra and XMM-Newton. Sources with an isotropic X-ray luminosity up to a few times 10^{39} erg/s are consistent with ``normal'' stellar-mass X-ray binaries
Soria, Roberto, Cropper, M., Motch, C.
openaire +3 more sources
Decomposing the Spectrum of Ultraluminous X-Ray Pulsar NGC 300 ULX-1
The Astrophysical Journal, 2023 A phase-resolved analysis on the X-ray spectrum of ultraluminous X-ray pulsar (ULXP) NGC 300 ULX-1 is performed with data taken with XMM-Newton and NuSTAR on 2016 December 16. In addition to the classical phase-restricting analysis, a method developed in
Shogo B. Kobayashi +5 more
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The nature of SS433 and the ultraluminous X-ray sources [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 MNRAS, in press. 7 pages, no figures.
Begelman, M. C. +3 more
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The Astrophysical Journal, 2023 We present a deep optical imaging campaign on the starburst galaxy NGC 4631 with CFHT/MegaCam. By supplementing the HST/ACS and Chandra/ACIS archival data, we search for the optical counterpart candidates of the five brightest X-ray sources in this ...
Jing Guo +11 more
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The Ultraluminous X‐Ray Sources Near the Center of M82 [PDF]
The Astrophysical Journal, 2007 We report the identification of a recurrent ultraluminous X-ray source (ULX), a highly absorbed X-ray source (possibly a background AGN), and a young supernova remnant near the center of the starburst galaxy M82. From a series of Chandra observations taken from 1999 to 2005, we found that the transient ULX first appeared in 1999 October.
Hsieh, PY +4 more
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Identification of Bubble Nebulae around NGC 55 ULX-1 with MUSE Observations
The Astrophysical Journal, 2023 Using the Multi Unit Spectroscopic Explorer (MUSE) instrument on the Very Large Telescope, we identified three bubble nebulae (denoted as A, B, and C) around an ultraluminous X-ray source (ULX) in NGC 55.
Changxing Zhou, Hua Feng, Fuyan Bian
doaj +1 more source
Radio Emission from an Ultraluminous X-ray Source [PDF]
Science, 2003 The physical nature of ultraluminous x-ray sources is uncertain. Stellar-mass black holes with beamed radiation and intermediate black holes with isotropic radiation are two plausible explanations. We discovered radio emission from an ultraluminous x-ray source in the dwarf irregular galaxy NGC 5408.
Kaaret, Philip +3 more
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A bright ultraluminous X-ray source in NGC 5907 [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 We present a multi-mission X-ray analysis of a bright (peak observed 0.3-10 keV luminosity of ~ 6x10^{40} erg s^{-1}), but relatively highly absorbed ULX in the edge-on spiral galaxy NGC 5907. The ULX is spectrally hard in X-rays (Gamma ~ 1.2-1.7, when fitted with an absorbed power-law), and has a previously-reported hard spectral break consistent with
Sutton, A. D. +6 more
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The Lack of Halo Ultraluminous X-Ray Sources [PDF]
The Astrophysical Journal, 2006 4 pages accepted to ...
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Intermediate Mass Black Holes: Their Motion and Associated Energetics
Advances in High Energy Physics, Volume 2014, Issue 1, 2014., 2014 There is a lot of current astrophysical evidence and interest in intermediate mass black holes (IMBH), ranging from a few hundred to several thousand solar masses. The active galaxy M82 and the globular cluster G1 in M31, for example, are known to host such objects.
C. Sivaram, Kenath Arun, Christian Corda
wiley +1 more source