Results 51 to 60 of about 195 (150)
Seeking for the Leading Actor on the Cosmic Stage: Galaxies versus Supermassive Black Holes
, 2012 Advances in Astronomy, Volume 2012, Issue 1, 2012.
Angela Bongiorno +4 more
wiley +1 more source
The Astrophysical JournalSupercritical accretion onto compact objects is expected to drive optically thick winds, resulting in observed X-ray emission as a function of viewing angle.
Xiaohong Tang, Hua Feng
doaj +1 more source
Magnetic Inclination Evolution of Accreting Neutron Stars in Intermediate/Low-mass X-Ray Binaries
The Astrophysical Journal, 2023 The magnetic inclination angle χ , namely the angle between the spin and magnetic axes of a neutron star, plays a vital role in its observational characteristics. However, there are few systematic investigations of its long-term evolution, especially for
Hao-ran Yang, Xiang-dong Li
doaj +1 more source
Soft X-Ray Transients as Ultraluminous X-Ray Sources [PDF]
Publications of the Astronomical Society of Japan, 2004 Abstract We discuss the possibility that the soft X-ray transient GRS 1915$+$105 evolved from a binary similar to V4641 Sgr (XTE J1819$-$254) by conservative mass-transfer, and estimate the possible mass-transfer rates during the evolution.
Chang-Hwan Lee, Gerald E. Brown
openaire +1 more source
Flux Variations and Torque Reversals of Cen X-3
The Astrophysical JournalCen X-3 is an archetypical X-ray pulsar with strong flux variations and alternating torque reversals, both of which are similar to those of recently discovered pulsating ultraluminous X-ray sources.
Jiren Liu
doaj +1 more source
COMPACT OPTICAL COUNTERPARTS OF ULTRALUMINOUS X-RAY SOURCES [PDF]
The Astrophysical Journal, 2011 Using archival Hubble Space Telescope (HST) imaging data, we report the multiband photometric properties of 13 ultraluminous X-ray sources (ULXs) that have a unique compact optical counterpart. Both magnitude and color variation are detected at time scales of days to years.
Tao, Lian +3 more
openaire +2 more sources
Radio Counterparts of Ultraluminous X-Ray Sources in Nearby Galaxies
The Astrophysical JournalRadio surveys of ultraluminous X-ray sources (ULXs) allow us to find supercritically accreting compact objects (SS 433/W50-like systems) or stripped nuclear black holes in nearby galaxies. We identified 21 such objects by crossmatching a ULX catalog with
Yijia Zhang +3 more
doaj +1 more source
The Orbital Period of the Ultraluminous X-ray Source in M82 [PDF]
Science, 2006 The ultraluminous x-ray source (ULX) in the galaxy M82 has been identified as a possible intermediate-mass black hole formed in stellar collisions in the super star cluster MGG 11. The x-ray flux from M82 is modulated, with a peak-to-peak amplitude corresponding to an isotropic luminosity of 2.4 _ 1040 erg s‐1 in M82 and a period of 62.0 2.5 days ...
Kaaret, Philip +2 more
openaire +3 more sources
How Beaming Shapes the Demographics of Ultraluminous X-Ray Sources
The Astrophysical JournalUltraluminous X-ray sources (ULXs) are off-nuclear compact objects with apparent luminosities above 10 ^39 erg s ^−1 , often exceeding the Eddington limit for stellar-mass black holes.
Ying-Han Mao, Xiang-Dong Li
doaj +1 more source
X-Ray Views of Galactic Accreting Pulsars in High-Mass X-Ray Binaries
UniverseAccreting X-ray pulsars, located in X-ray binaries, are neutron stars with magnetic fields as strong as B∼1012–13 G. This review offers a concise overview of the accretion and radiation processes of X-ray pulsars and summarizes their rich observational ...
Shan-Shan Weng, Long Ji
doaj +1 more source