Giant, repeating, optical bursts from the soft X-ray transient Aquila X-1

Edward L. Robinson, Patrick Young

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We report the detection of optical bursts during a low-amplitude, flat-topped eruption of the soft X-ray transient Aql X-1. The bursts had amplitudes between 0.17 and 0.35 mag and were variable in duration, some lasting longer than 78 s. On one night they recurred quasi-periodically at a mean interval of 1.01 hr. Regularly repeating optical bursts of this kind have not heretofore been observed from any X-ray binary. The accreting star in Aql X-1 is known to be a neutron star. We propose that the optical bursts are reprocessed type I X-ray bursts; that is, that they are thermonuclear flashes in the envelope of the neutron star.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume491
Issue number2 PART II
StatePublished - 1997
Externally publishedYes

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bursts
x rays
neutron stars
volcanic eruption
night
volcanic eruptions
flash
envelopes
intervals
stars
detection

Keywords

  • Binaries: close
  • Stars: individual (Aquila X-1)
  • Stars: neutron

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Giant, repeating, optical bursts from the soft X-ray transient Aquila X-1. / Robinson, Edward L.; Young, Patrick.

In: Astrophysical Journal, Vol. 491, No. 2 PART II, 1997.

Research output: Contribution to journalArticle

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abstract = "We report the detection of optical bursts during a low-amplitude, flat-topped eruption of the soft X-ray transient Aql X-1. The bursts had amplitudes between 0.17 and 0.35 mag and were variable in duration, some lasting longer than 78 s. On one night they recurred quasi-periodically at a mean interval of 1.01 hr. Regularly repeating optical bursts of this kind have not heretofore been observed from any X-ray binary. The accreting star in Aql X-1 is known to be a neutron star. We propose that the optical bursts are reprocessed type I X-ray bursts; that is, that they are thermonuclear flashes in the envelope of the neutron star.",
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T1 - Giant, repeating, optical bursts from the soft X-ray transient Aquila X-1

AU - Robinson, Edward L.

AU - Young, Patrick

PY - 1997

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AB - We report the detection of optical bursts during a low-amplitude, flat-topped eruption of the soft X-ray transient Aql X-1. The bursts had amplitudes between 0.17 and 0.35 mag and were variable in duration, some lasting longer than 78 s. On one night they recurred quasi-periodically at a mean interval of 1.01 hr. Regularly repeating optical bursts of this kind have not heretofore been observed from any X-ray binary. The accreting star in Aql X-1 is known to be a neutron star. We propose that the optical bursts are reprocessed type I X-ray bursts; that is, that they are thermonuclear flashes in the envelope of the neutron star.

KW - Binaries: close

KW - Stars: individual (Aquila X-1)

KW - Stars: neutron

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M3 - Article

VL - 491

JO - Astrophysical Journal

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