Quiescent state and outburst evolution of SGR 0501+4516

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Title: Quiescent state and outburst evolution of SGR 0501+4516
Authors: Camero-Arranz, Ascensión | Papitto, Alessandro | Rea, Nanda | Viganò, Daniele | Pons, José A. | Tiengo, Andrea | Mereghetti, Sandro | Turolla, Roberto | Esposito, Paolo | Zane, Silvia | Israel, Gian Luca | Götz, Diego
Research Group/s: Astrofísica Relativista
Center, Department or Service: Universidad de Alicante. Departamento de Física Aplicada
Keywords: Pulsars: general | Pulsars: individual: SGR 0501+4516 | X-rays: general
Knowledge Area: Astronomía y Astrofísica
Issue Date: 16-Jan-2014
Publisher: Royal Astronomical Society
Citation: Monthly Notices of the Royal Astronomical Society. 2014, 438(4): 3291-3298. doi:10.1093/mnras/stt2432
Abstract: We report on the quiescent state of the soft gamma repeater SGR 0501+4516 observed by XMM–Newton on 2009 August 30. The source exhibits an absorbed flux ∼75 times lower than that measured at the peak of the 2008 outburst, and a rather soft spectrum, with the same value of the blackbody temperature observed with ROSAT back in 1992. This new observation is put into the context of all existing X-ray data since its discovery in 2008 August, allowing us to complete the study of the timing and spectral evolution of the source from outburst until its quiescent state. The set of deep XMM–Newton observations performed during the few years time-scale of its outburst allows us to monitor the spectral characteristics of this magnetar as a function of its rotational period, and their evolution along these years. After the first ∼10 d, the initially hot and bright surface spot progressively cooled down during the decay. We discuss the behaviour of this magnetar in the context of its simulated secular evolution, inferring a plausible dipolar field at birth of 3 × 1014 G, and a current (magnetothermal) age of ∼10 kyr.
Sponsor: This work was supported by the grants AYA2012-39303, SGR2009-811, and iLINK2011-0303. AP is supported by a Juan de la Cierva Fellowship in IEEC. NR is supported by a Ramon y Cajal fellowship and by an NWO Vidi Award. DV was supported by the grants AYA2010-21097-C03-02, ACOMP/2012/135, AYA 2012-39303 and SGR 2009-811.
URI: http://hdl.handle.net/10045/36199
ISSN: 0035-8711 (Print) | 1365-2966 (Online)
DOI: 10.1093/mnras/stt2432
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
Peer Review: si
Publisher version: http://dx.doi.org/10.1093/mnras/stt2432
Appears in Collections:INV - Astrofísica Relativista - Artículos de Revistas

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