Results 61 to 70 of about 14,620 (167)
Discovery of a New Phase-transient Cyclotron Line in A0535+26: Constraints on the Accretion Geometry
The Astrophysical JournalIn 2020 November, A0535+26 underwent one of its brightest outbursts, reaching nearly 12 Crab in X-ray flux. Observed by Insight-HXMT, NuSTAR, NICER, and AstroSat, this event provided valuable insights into Be/X-ray binaries.
Ashwin Devaraj +3 more
doaj +1 more source
XMM-Newton View of Pulsating Iron Fluorescent Emission from Centaurus X-3
The Astrophysical JournalCentaurus X–3 (Cen X–3) is a bright, high-mass X-ray binary pulsar. We present a pulse phase–resolved X-ray spectral analysis of data from an archival XMM-Newton observation of Cen X–3 taken during the high state of the source.
Kinjal Roy +2 more
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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
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X-Rays from Stars and Planetary Systems [PDF]
, 2019 The Chandra X-ray Observatory has completed a remarkable twenty years in orbit. A large part of the science program of Chandra during this time has involved the study of stars and their planetary systems. This primer aims to give the reader a taste of the enormous range of stellar and planetary astrophysics that Chandra has enabled.
openaire +2 more sources
The Astrophysical JournalWe study 15 thermonuclear X-ray bursts from 4U 1820–30 observed with the Neutron Star Interior Composition Explorer (NICER). We find evidence of a narrow emission line at 1.0 keV and three absorption lines at 1.7, 3.0, and 3.75 keV, primarily around the ...
Gaurava K. Jaisawal +8 more
doaj +1 more source
Discovery of a Long Thermonuclear X-Ray Burst from the Ultracompact Binary 4U 1850–087
The Astrophysical JournalWe report the detection of a long X-ray burst from the ultracompact binary 4U 1850–087. The type I X-ray burst was observed on MJD 60171.65 by the Monitor of All-sky X-ray Image and Neutron Star Interior Composition Explorer (NICER). We analyze the NICER
Yongqi Lu +4 more
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The Astrophysical JournalWe present the results obtained from timing and spectral studies of 15 thermonuclear X-ray bursts from 4U 1820–30 observed with the Neutron Star Interior Composition Explorer (NICER) during its 5 yr of observations between 2017 and 2022.
Gaurava K. Jaisawal +16 more
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A Statistical Study of Soft X-Ray Flares on Solar-type Stars
The Astrophysical JournalThe statistical characteristics of stellar flares at optical bands have received extensive study, but they remain to be studied at soft X-ray bands, in particular for solar-type stars.
Z. H. Zhao +4 more
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Orbital Phase Shifts of Type-I Outbursts in EXO 2030+375
The Astrophysical JournalEXO 2030+375 is a peculiar high-mass X-ray binary that has been exhibiting Type-I outburst activities consistently over the past decades. The phases of outburst peaks are generally stable and occur near the orbital periastron.
Run-Ting Huang, Long Ji, Jing-Zhi Yan
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The Astrophysical JournalHigh-energy emission spectra from the outer atmospheres of late-type stars represent an important feature of the stellar activity in several contexts, such as the photoevaporation and photochemistry of planetary atmospheres or the modeling of irradiated ...
A. Maggio +3 more
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