The Long-period, Violently-variable Compact Source In RCW103

Details The Long-period, Violently-variable Compact Source In RCW103 The Long-period, Violently-variable Compact Source In RCW103

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006head....9.0127d&link_type=abstract

American Astronomical Society, HEAD meeting #9, #1.27; Bulletin of the American Astronomical Society, Vol. 38, p.333

Astronomy and Astrophysics

Astronomy

Scientific paper

A long XMM-Newton observation performed in August 2005 shows a strong modulation with a periodicity of 6.67±0.03 hr of the emission of 1E 161348-5055 (1E), the compact X-ray source at the center of the 2000-yr old Supernova Remnant RCW103. A significant spectral variation is seen along the cycle. The same periodicity is seen in a previous XMM observation, performed in 2001, when the source was caught at a 6 times higher flux level and its overall phenomenology was remarkably different. Such observations settle the case for a unique phenomenology. If 1E is genetically linked to RCW103, it could either be a binary system featuring a compact object and a low-mass star in an eccentric orbit, or a peculiar isolated magnetar, dramatically slowed down by interaction with a debris disc. Such pictures will be discussed, also in view of the results of very recent IR observations performed with ESO VLT/NACO.

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