Thermonuclear X-ray Bursts

Galloway, D. K.; Keek, L.

doi:10.1007/978-3-662-62110-3_5

Cited by 92 publications

(57 citation statements)

References 205 publications

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“…Additionally, these bursts are observed to, and theoretically expected to repeat (76,77). In particular, bursts with durations of 10-100s have typical recurrence timescales of hours to days (77). No other bursts from the localization region of GRB 140814A have been reported from X-ray follow-up observations of the field, or the >11 years of observations from the MAXI GSC.…”

Section: Consistency Checksmentioning

confidence: 95%

“…The vast majority of known bursters have a Galactic latitude between -15 and +15 deg (75) in contrast to the +66.4 deg Galactic latitude of GRB 140814A. Additionally, these bursts are observed to, and theoretically expected to repeat (76,77). In particular, bursts with durations of 10-100s have typical recurrence timescales of hours to days (77).…”

Section: Consistency Checksmentioning

confidence: 99%

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A transient radio source consistent with a merger-triggered core collapse supernova

Dong

Hallinan

Nakar

et al. 2021

Science

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A core-collapse supernova occurs when exothermic fusion ceases in the core of a massive star, typically due to exhaustion of nuclear fuel. Theory predicts that fusion could be interrupted earlier, by merging of the star with a compact binary companion. We report a luminous radio transient, VT J121001+495647, found in the Very Large Array Sky Survey. The radio emission is consistent with supernova ejecta colliding with a dense shell of material, potentially ejected by binary interaction in the centuries prior to explosion. We associate the supernova with an archival X-ray transient, which implies a relativistic jet was launched during the explosion. The combination of an early relativistic jet and late-time dense interaction is consistent with expectations for a mergerdriven explosion. Main Text:Most massive stars (those > 8 solar masses, M⊙) are born in close binaries, within which expansion of one star during its evolution can lead to mass transfer with the companion (1,2). In some systems, the faster evolving (more massive) star explodes as a supernova, leaving behind a compact object (neutron star or black hole) remnant in a close orbit with its companion. When the companion (second star) later expands, it transfers mass in the other direction, onto the compact object. Systems of this type with wide orbits have been observed in the Milky Way (3). Those with closer orbits undergo unstable mass transfer, causing the compact object to spiral into the atmosphere of the massive star, forming a common envelope binary.During the common envelope phase, the outer atmosphere of the donor star becomes unbound, forming a dense and expanding toroidal shell around the binary (4). The physics of the common envelope are difficult to model. Some inspirals halt before reaching the donor's core. This process is a leading candidate for producing the close double-compact-object binaries detected by gravitational wave observatories (5). Other systems are expected to spiral inwards until the compact object reaches the star's core. Theory predicts that some of these systems tidally disrupt the core, forming a rapidly accreting neutrino-cooled disk (6). This energetic accretion is predicted to launch a jet and cause a merger-driven explosion (6,7,8).We performed a systematic blind search for radio transients in the Very Large Array Sky Survey (VLASS) (9). We identified and followed up luminous point sources associated with galaxies closer than 200 megaparsec (Mpc) that are present in the first half-epoch (Epoch 1.1; Sep 2017 -Feb 2018 of the survey but absent from the earlier (1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005) Faint Images of the Radio Sky at Twenty-Centimeters (FIRST) survey (10, 11). The most luminous source we identified was VLASS transient VT J121001+495647 (hereafter abbreviated VT 1210+4956), located in an offnuclear region of the dwarf star-forming galaxy SDSS J121001.38+495641.7 (fig. 1) (12). This galaxy has stellar mass ~ 10 9.2 M⊙, specific star formation rate ~0.25 M⊙ Gyr -1 M⊙ -1 and ...

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Section: Consistency Checksmentioning

confidence: 95%

Section: Consistency Checksmentioning

confidence: 99%

A transient radio source consistent with a merger-triggered core collapse supernova

Dong

Hallinan

Nakar

et al. 2021

Science

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“…Fig. 6 shows an example of a particularly intense burst observed by INTEGRAL from the AMSP HETE J1900.1-2455 (Falanga et al, 2007a), during which the double peaked profile in the IBIS/ISGRI data proved that a photospheric radius expansion took place (see, e.g., Galloway and Keek, 2017, for a recent review). On the other hand, the light curves of most of the thermonuclear bursts shown by the AM-SPs observed by INTEGRAL were characterized by a fast rise and an exponential decay lasting a few tens of seconds.…”

Section: Thermonuclear Type-i X-ray Burstsmentioning

confidence: 99%

The INTEGRAL view of the pulsating hard X-ray sky: from accreting and transitional millisecond pulsars to rotation-powered pulsars and magnetars

Papitto¹,

Falanga

Hermsen

et al. 2020

New Astronomy Reviews

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In the last 25 years, a new generation of X-ray satellites imparted a significant leap forward in our knowledge of X-ray pulsars. The discovery of accreting and transitional millisecond pulsars proved that disk accretion can spin up a neutron star to a very high rotation speed. The detection of MeV-GeV pulsed emission from a few hundreds of rotation-powered pulsars probed particle acceleration in the outer magnetosphere, or even beyond. Also, a population of two dozens of magnetars has emerged. INTEGRAL played a central role to achieve these results by providing instruments with high temporal resolution up to the hard X-ray/soft γ-ray band and a large field of view imager with good angular resolution to spot hard X-ray transients. In this article, we review the main contributions by INTEGRAL to our understanding of the pulsating hard X-ray sky, such as the discovery and characterization of several accreting and transitional millisecond pulsars, the generation of the first catalog of hard X-ray/soft γ-ray rotation-powered pulsars, the detection of polarization in the hard X-ray emission from the Crab pulsar, and the discovery of persistent hard X-ray emission from several magnetars.

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“…The accretion of matter onto a neutron star in a low-mass x-ray binary induces various nuclear processes leading to remarkable astrophysical phenomena [1][2][3]. In these systems, matter is transferred from a low-mass stellar companion to a neutron star via an accretion disk.…”

Section: Introductionmentioning

confidence: 99%

Experimental constraints on shallow heating in accreting neutron-star crusts

et al. 2020

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The observed thermal relaxation of transiently accreting neutron stars during quiescence periods in low-mass x-ray binaries suggests the existence of unknown heat sources in the shallow layers of neutron-star crust. Making use of existing experimental nuclear data, we estimate the maximum possible amount of heat that can be deposited in the outer crust of an accreting neutron star due to electron captures and pycnonuclear fusion reactions triggered by the burial of x-ray burst ashes.

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Thermonuclear X-ray Bursts

Cited by 92 publications

References 205 publications

A transient radio source consistent with a merger-triggered core collapse supernova

A transient radio source consistent with a merger-triggered core collapse supernova

The INTEGRAL view of the pulsating hard X-ray sky: from accreting and transitional millisecond pulsars to rotation-powered pulsars and magnetars

Experimental constraints on shallow heating in accreting neutron-star crusts

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