Long-term radiative behavior of SGR 1900+14

Ersin Göǧüş, Tolga Güver, Feryal Ozel, David Eichler, Chryssa Kouveliotou

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The prolific magnetar SGR 1900+14 showed two outbursts in the last decade and has been closely monitored in the X-rays to track the changes in its radiative properties. We use archival Chandra and XMM-Newton observations of SGR 1900+14 to construct a history of its spectrum and persistent X-ray flux spanning a period of about seven years. We show that the decline of its X-ray flux in these two outburst episodes follows the same trend. The flux begins to decline promptly and rapidly subsequent to the flares, then decreases gradually for about 600 days, at which point it resumes a more rapid decline. Utilizing the high-quality spectral data in each epoch, we also study the spectral coevolution of the source with its flux. We find that neither the magnetic field strength nor the magnetospheric properties change over the period spanned by the observations, while the surface temperature as well as the inferred emitting area both decline with time following both outbursts. We also show that the source reached the same minimum flux level in its decline from these two subsequent outbursts, suggesting that this flux level may be its

Original languageEnglish (US)
JournalAstrophysical Journal
Volume728
Issue number2
DOIs
StatePublished - Feb 20 2011

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outburst
coevolution
magnetars
surface temperature
x rays
XMM-Newton telescope
magnetic field
newton
flares
field strength
history
time measurement
histories
trends
magnetic fields

Keywords

  • X-rays: bursts

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Göǧüş, E., Güver, T., Ozel, F., Eichler, D., & Kouveliotou, C. (2011). Long-term radiative behavior of SGR 1900+14. Astrophysical Journal, 728(2). https://doi.org/10.1088/0004-637X/728/2/160

Long-term radiative behavior of SGR 1900+14. / Göǧüş, Ersin; Güver, Tolga; Ozel, Feryal; Eichler, David; Kouveliotou, Chryssa.

In: Astrophysical Journal, Vol. 728, No. 2, 20.02.2011.

Research output: Contribution to journalArticle

Göǧüş, E, Güver, T, Ozel, F, Eichler, D & Kouveliotou, C 2011, 'Long-term radiative behavior of SGR 1900+14', Astrophysical Journal, vol. 728, no. 2. https://doi.org/10.1088/0004-637X/728/2/160
Göǧüş, Ersin ; Güver, Tolga ; Ozel, Feryal ; Eichler, David ; Kouveliotou, Chryssa. / Long-term radiative behavior of SGR 1900+14. In: Astrophysical Journal. 2011 ; Vol. 728, No. 2.
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