. (2012) Multi-wavelength observations of the radio magnetar PSR J1622-4950 and discovery of its possibly associated supernova remnant. The Astrophysical Journal, Vol.751 (No.1). p. 53. ISSN 0004-637X

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Abstract

We present multi-wavelength observations of the radio magnetar PSR J1622-4950 and its environment. Observations of PSR J1622-4950 with Chandra (in 2007 and 2009) and XMM (in 2011) show that the X-ray flux of PSR J1622-4950 has decreased by a factor of ~50 over 3.7 years, decaying exponentially with a characteristic time of τ = 360 ± 11 days. This behavior identifies PSR J1622-4950 as a possible addition to the small class of transient magnetars. The X-ray decay likely indicates that PSR J1622-4950 is recovering from an X-ray outburst that occurred earlier in 2007, before the 2007 Chandra observations. Observations with the Australia Telescope Compact Array show strong radio variability, including a possible radio flaring event at least one and a half years after the 2007 X-ray outburst that may be a direct result of this X-ray event. Radio observations with the Molonglo Observatory Synthesis Telescope reveal that PSR J1622-4950 is 8' southeast of a diffuse radio arc, G333.9+0.0, which appears non-thermal in nature and which could possibly be a previously undiscovered supernova remnant (SNR). If G333.9+0.0 is an SNR then the estimates of its size and age, combined with the close proximity and reasonable implied velocity of PSR J1622-4950, suggest that these two objects could be physically associated.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Neutron stars, Supernova remnants
Journal or Publication Title:	The Astrophysical Journal
Publisher:	Institute of Physics Publishing Ltd.
ISSN:	0004-637X
Date:	April 2012
Volume:	Vol.751
Number:	No.1
Page Range:	p. 53
Identification Number:	10.1088/0004-637X/751/1/53
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Australia. Dept. of Industry, Innovation, Science, Research and Tertiary Education, Australian Research Council (ARC), United States. National Aeronautics and Space Administration (NASA), Spain. Ministerio de Educación y Ciencia (MEC), Consejo Superior de Investigaciones Científicas (Spain), Sardinia (Italy), Science and Technology Facilities Council (Great Britain) (STFC), European Space Agency (ESA), University of Sydney. Science Foundation for Physics, Australia
Grant number:	NAS8-03060 (NASA), AYA2009-07391, SGR2009-811, TW2010005, NAS8-39073 (NASA), L.R. 7/2007 (Sardinia), GO9-0155X (NASA)
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URI:	http://wrap.warwick.ac.uk/id/eprint/45820

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