Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Ultraluminous X-ray sources"'
Autor:
Yi-Heng Chi, Jiahui Huang, Ping Zhou, Hua Feng, Xiang-Dong Li, Sera B. Markoff, Samar Safi-Harb, Laura Olivera-Nieto
Publikováno v:
The Astrophysical Journal Letters, Vol 975, Iss 2, p L28 (2024)
How black holes are formed remains an open and fundamental question in astrophysics. Despite theoretical predictions, it lacks observations to understand whether the black hole formation experiences a supernova explosion. Here we report the discovery
Externí odkaz:
https://doaj.org/article/6449c07f526648a4b92a3b46c4cfcbc1
Publikováno v:
The Astrophysical Journal Letters, Vol 966, Iss 1, p L5 (2024)
We model the spectral formation occurring in the binary X-ray pulsar (XRP) RX J0209.6−7427 during the 2019 super-Eddington outburst. Using a theoretical model previously developed by the authors, we are able to produce spectra that closely resemble
Externí odkaz:
https://doaj.org/article/3af818f090e84c6bb2353bc12f957bde
Autor:
Matteo Bachetti, Matthew J. Middleton, Ciro Pinto, Andrés Gúrpide, Dominic J. Walton, Murray Brightman, Bret Lehmer, Timothy P. Roberts, Georgios Vasilopoulos, Jason Alford, Roberta Amato, Elena Ambrosi, Lixin Dai, Hannah P. Earnshaw, Hamza El Byad, Javier A. García, Gian Luca Israel, Amruta Jaodand, Kristin Madsen, Chandreyee Maitra, Shifra Mandel, Kaya Mori, Fabio Pintore, Ken Ohsuga, Maura Pilia, Daniel Stern, George Younes, Anna Wolter
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 10 (2023)
Introduction: Ultraluminous X-ray sources (ULXs) represent an extreme class of accreting compact objects: from the identification of some of the accretors as neutron stars to the detection of powerful winds travelling at 0.1–0.2 c, the increasing e
Externí odkaz:
https://doaj.org/article/8a30718b913d4e20b3ce8ab2b4efeaa2
Publikováno v:
The Astrophysical Journal, Vol 977, Iss 1, p 10 (2024)
Although ultraluminous X-ray pulsars (ULXPs) are believed to be powered by super-Eddington accretion onto a magnetized neutron star (NS), the detailed structures of the inflow–outflow and magnetic fields are still not well understood. We perform ge
Externí odkaz:
https://doaj.org/article/dbe10bf41d54437aa373db2f1476f9a9
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 166 (2024)
We use the Athena++ Monte Carlo (MC) radiation transfer module to postprocess simulation snapshots from nonrelativistic Athena++ radiation magnetohydrodynamic (RMHD) simulations. These simulations were run using a gray (frequency-integrated) approach
Externí odkaz:
https://doaj.org/article/0f59a5202074426b8197debadddf3c1f
Autor:
Wen-Cong Chen
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 1, p 38 (2024)
Recently, the first pulsating ultraluminous X-ray source M82 X-2 was reported to be experiencing a rapid orbital decay at a rate of $\dot{P}=-(5.69\pm 0.24)\times {10}^{-8}\,{\rm{s}}\,{{\rm{s}}}^{-1}$ based on 7 yr NuSTAR data. To account for the obs
Externí odkaz:
https://doaj.org/article/0cfb7ec9828c4e448238bc9697dbf2d5
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 1, p 8 (2024)
We present an analysis of X-ray observations of the ultraluminous X-ray source (ULX) in I Zw 18 based on archival data taken with Chandra, XMM-Newton, and Suzaku. This ULX is considered to be an intermediate-mass black hole candidate simply because i
Externí odkaz:
https://doaj.org/article/690eac8916134e61948759db95825219
Return to the Forgotten Ultraluminous X-Ray Source: A Broadband NICER+NuSTAR Study of NGC 4190 ULX-1
Autor:
Hannah P. Earnshaw, Matteo Bachetti, Murray Brightman, Felix Fürst, Fiona A. Harrison, Matthew Middleton, Renee Ludlam, Sean N. Pike, Daniel Stern, Dominic J. Walton
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 111 (2024)
We observed the nearby and relatively understudied ultraluminous X-ray source (ULX) NGC 4190 ULX-1 jointly with Neutron Star Interior Composition Explorer (NICER) and NuSTAR to investigate its broadband spectrum, timing properties, and spectral varia
Externí odkaz:
https://doaj.org/article/fbd55caeb1fe4f54a317f77c1ddfa4ac
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 95 (2024)
The discovery of coherent pulsations from several ultraluminous X-ray pulsars (ULXPs) has provided direct evidence of a supercritical accretion flow. However, the geometrical structure of such an accretion flow onto the central neutron star remains p
Externí odkaz:
https://doaj.org/article/cd7766489ef54e48b0e4c3ba8f47a5e0
Autor:
Lena Komarova, M. S. Oey, Svea Hernandez, Angela Adamo, Mattia Sirressi, Claus Leitherer, J. M. Mas-Hesse, Göran Östlin, Edmund Hodges-Kluck, Arjan Bik, Matthew J. Hayes, Anne E. Jaskot, Daniel Kunth, Peter Laursen, Jens Melinder, T. Emil Rivera-Thorsen
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 2, p 117 (2024)
As the nearest confirmed Lyman continuum (LyC) emitter, Haro 11 is an exceptional laboratory for studying LyC escape processes crucial to cosmic reionization. Our new Hubble Space Telescope/Cosmic Origins Spectrograph G130M/1055 observations of its t
Externí odkaz:
https://doaj.org/article/926f63f6ff0a4bd0a5ea2a9d4b1e68c3