Results 11 to 20 of about 238,966 (146)
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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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
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The Astrophysical Journal, 2023 We have conducted long-slit spectroscopic observations and analyzed archival radio data for the ultraluminous X-ray source (ULX) NGC 4861 X-1. Our spectral line analysis unveils NGC 4861 X-1 as the fourth ULX situated within an X-ray photoionized nebula,
Hang Gong +7 more
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The Astrophysical Journal, 2023 Despite the 30 yr history of ultraluminous X-ray sources (ULXs) studies, issues such as the majority of their physical natures (i.e., neutron stars, stellar-mass black holes, or intermediate black holes) as well as the accretion mechanisms are still ...
Chen-Hsun Ma +3 more
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Optical and X-ray Follow-Up to a Globular Cluster Ultraluminous X-ray Source in NGC 4472 [PDF]
, 2022 NGC 4472 is home to five ultraluminous X-ray sources hosted by globular clusters. These sources have been suggested as good black hole candidates in extragalactic globular clusters$-$ a highly sought after population that may provide observational information regarding the progenitors of merging black hole binaries.
arxiv +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
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Ultraluminous X-ray sources [PDF]
New Astronomy Reviews, 2023, Volume 96, article id. 101672, 2023 The study of ultraluminous X-ray sources (ULXs) has changed dramatically over the last decade. In this review we first describe the most important observations of ULXs in various wavebands, and across multiple scales in space and time. We discuss recent progress and current unanswered questions.
arxiv +1 more source
High-energy Neutrinos from Gamma-Ray-faint Accretion-powered Hypernebulae
The Astrophysical Journal, 2023 Hypernebulae are inflated by accretion-powered winds accompanying hyper-Eddington mass transfer from an evolved post-main-sequence star onto a black hole or neutron star companion.
Navin Sridhar, Brian D. Metzger, Ke Fang
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The Astrophysical Journal, 2023 We present the first X-ray census of fast radio burst (FRB) host galaxies to conduct the deepest search for active galactic nuclei (AGN) and X-ray counterparts to date.
T. Eftekhari +18 more
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Identification of a Helium Donor Star in NGC 247 ULX-1
The Astrophysical Journal, 2023 With Very Large Telescope Multi Unit Spectroscopic Explorer (MUSE) observations, we detected highly variable helium emission lines from the optical counterpart of the supersoft ultraluminous X-ray source (ULX) NGC 247 ULX-1.
Changxing Zhou, Hua Feng, Fuyan Bian
doaj +1 more source