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Multi-wavelength observations of the radio magnetar PSR J1622-4950 and discovery of its possibly associated supernova remnant
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(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. doi:10.1088/0004-637X/751/1/53 ISSN 0004-637X.
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WRAP_Steeghs_Magnetar_1203.2719v1.pdf - Accepted Version Download (360Kb) | Preview |
Official URL: http://dx.doi.org/10.1088/0004-637X/751/1/53
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 | ||||
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Subjects: | Q Science > QB Astronomy | ||||
Divisions: | Faculty of Science, Engineering and Medicine > 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 | ||||
Official Date: | April 2012 | ||||
Dates: |
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Volume: | Vol.751 | ||||
Number: | No.1 | ||||
Page Range: | p. 53 | ||||
DOI: | 10.1088/0004-637X/751/1/53 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 21 December 2015 | ||||
Date of first compliant Open Access: | 21 December 2015 | ||||
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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