MULTI-WAVELENGTH OBSERVATIONS OF THE RADIO MAGNETAR PSR J1622-4950 AND DISCOVERY OF ITS POSSIBLY ASSOCIATED SUPERNOVA REMNANT

作者：Anderson Gemma E^*; Gaensler B M; Slane Patrick O; Rea Nanda; Kaplan David L; Posselt Bettina; Levin Lina; Johnston Simon; Murray Stephen S; Brogan Crystal L; Bailes Matthew; Bates Samuel; Benjamin Robert A; Bhat N D Ramesh; Burgay Marta; Burke Spolaor Sarah; Chakrabarty Deepto; D' Amico Nichi; Drake Jeremy J; Esposito Paolo; Grindlay Jonathan E; Hong Jaesub; Israel G L; Keith Michael J; Kramer Michael; Lazio T Joseph W; Lee Julia C

来源：Astrophysical Journal, 2012, 751(1): 53.

DOI：10.1088/0004-637X/751/1/53

• ISM: individual objects (G333.9+0.0)
• ISM: supernova remnants
• pulsars: individual (PSR J1622-4950)
• radio continuum: stars
• stars: neutron
• X-rays: stars

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 similar to 50 over 3.7 years, decaying exponentially with a characteristic time of tau = 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%26apos; 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.

• 出版日期2012-5-20
• 单位CSIRO