The compact central object in the supernova remnant G266.2-1.2

Oleg Kargaltsev, George G. Pavlov, Divas Sanwal, Gordon P. Garmire

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

We observed the compact central object CXOU J085201.4-461753 in the supernova remnant G266.2-1.2 (RX J0852.0-4622) with the Chandra ACIS detector in timing mode. The spectrum of this object can be described by a blackbody model with the temperature kT = 404 ± 5 eV and radius of the emitting region R = 0.28 ± 0.01 km at a distance of 1 kpc. Power-law and thermal plasma models do not fit the source spectrum. The spectrum shows a marginally significant feature at 1.68 keV. A search for periodicity yields two candidate periods, about 301 and 33 ms, both significant at a 2.1 σlevel; the corresponding pulsed fractions are 13% and 9%, respectively. We find no evidence for long-term variability of the source flux, nor do we find extended emission around the central object. We suggest that CXOU J085201.4-461753 is similar to CXOU J232327.9+584842, the central source of the supernova remnant Cas A. It could be either a neutron star with a low or regular magnetic field, slowly accreting from a fossil disk or, more likely, an isolated neutron star with a superstrong magnetic field. In either case, a conservative upper limit on surface temperature of a 10 km radius neutron star is about 90 eV, which suggests accelerated cooling for a reasonable age of a few thousand years.

Original languageEnglish (US)
Pages (from-to)1060-1064
Number of pages5
JournalAstrophysical Journal
Volume580
Issue number2 I
DOIs
StatePublished - Dec 1 2002

Fingerprint

supernova remnants
neutron stars
magnetic field
radii
thermal plasmas
fossils
magnetic fields
surface temperature
periodicity
periodic variations
power law
time measurement
fossil
cooling
plasma
detectors
temperature

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Kargaltsev, Oleg ; Pavlov, George G. ; Sanwal, Divas ; Garmire, Gordon P. / The compact central object in the supernova remnant G266.2-1.2. In: Astrophysical Journal. 2002 ; Vol. 580, No. 2 I. pp. 1060-1064.
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abstract = "We observed the compact central object CXOU J085201.4-461753 in the supernova remnant G266.2-1.2 (RX J0852.0-4622) with the Chandra ACIS detector in timing mode. The spectrum of this object can be described by a blackbody model with the temperature kT = 404 ± 5 eV and radius of the emitting region R = 0.28 ± 0.01 km at a distance of 1 kpc. Power-law and thermal plasma models do not fit the source spectrum. The spectrum shows a marginally significant feature at 1.68 keV. A search for periodicity yields two candidate periods, about 301 and 33 ms, both significant at a 2.1 σlevel; the corresponding pulsed fractions are 13{\%} and 9{\%}, respectively. We find no evidence for long-term variability of the source flux, nor do we find extended emission around the central object. We suggest that CXOU J085201.4-461753 is similar to CXOU J232327.9+584842, the central source of the supernova remnant Cas A. It could be either a neutron star with a low or regular magnetic field, slowly accreting from a fossil disk or, more likely, an isolated neutron star with a superstrong magnetic field. In either case, a conservative upper limit on surface temperature of a 10 km radius neutron star is about 90 eV, which suggests accelerated cooling for a reasonable age of a few thousand years.",
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Kargaltsev, O, Pavlov, GG, Sanwal, D & Garmire, GP 2002, 'The compact central object in the supernova remnant G266.2-1.2', Astrophysical Journal, vol. 580, no. 2 I, pp. 1060-1064. https://doi.org/10.1086/343852

The compact central object in the supernova remnant G266.2-1.2. / Kargaltsev, Oleg; Pavlov, George G.; Sanwal, Divas; Garmire, Gordon P.

In: Astrophysical Journal, Vol. 580, No. 2 I, 01.12.2002, p. 1060-1064.

Research output: Contribution to journalArticle

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