X-ray observations of rx j0822-4300 and puppis-a - INSPIRE

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X-ray observations of rx j0822-4300 and puppis-a

Aug, 2005

34 pages

Published in:

Astron.Astrophys. 454 (2006) 543

e-Print:

astro-ph/0508655 [astro-ph]

DOI:

10.1051/0004-6361:20053554

View in:

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Abstract: (arXiv)

Based on observations with the X-ray observatories Chandra and XMM-Newton we present results from a detailed spectro-imaging and timing analysis of the central compact X-ray source RX J0822-4300 in the supernova remnant Puppis-A. The superior angular resolution of Chandra allows for the first time to pinpoint the point source nature of this object down to

0.59\pm0.01

arcsec (FWHM) and to determine its position:{RA=

08^{\rm h}21^{\rm m}57.40^{\rm s}

, Dec=

-43^{\circ}00^{'}16.69^{''}

(J2000)} with sub-arcsecond accuracy. Spectral fits based on Chandra and XMM-Newton data provide a tight constraint on the emission properties of RX J0822-4300. Most of its X-ray emission seems to be of thermal origin. A model spectrum consisting of two blackbody components with

T_{1}\simeq 2.6\times10^{6}

K,

T_{2}\simeq 5.0\times10^{6}

K and

R_{1}\simeq 3.3

km,

R_2 \simeq 0.75

km for the blackbody temperatures and the size of the projected emitting regions, respectively, provides the best model description of its spectrum. A search for X-ray pulsations from RX J0822-4300, revealed an interesting periodicity candidate which, if confirmed, does not support a scenario of steady spin-down.

STARS NEUTRON
X-RAYS STARS

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