Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..587..523m&link_type=abstract
GAMMA 2001: Gamma-Ray Astrophysics 2001. AIP Conference Proceedings, Volume 587, pp. 523-527 (2001).
Astronomy and Astrophysics
Astrophysics
1
Supernova Remnants, Gamma-Ray, X-Ray, X- And Gamma-Ray Telescopes And Instrumentation, Origin, Formation, Evolution, Age, And Star Formation
Scientific paper
The supernova remnant G266.1-1.2 has attracted considerable interest owing to its possible detection in the 1.156 MeV line of 44Ti by COMPTEL. If this controversial result is confirmed, G266.1-1.2 well deserves the ``Vela Junior'' nickname, since the observed gamma-ray line flux implies a very small age (~700 years) and distance (~200 pc). We discuss the implications of recent X-ray observations on the SNR distance and age. Two sources were detected with BeppoSAX close to the geometrical center of G266.1-1.2. Independent of which one is the neutron star associated to G266.1-1.2, their properties imply an age of a few 10,000 years and a distance greater than one kpc. We also present a preliminary analysis of the brightest portion of the SNR shell, in which significant upper limits on the presence of X-ray emission lines are derived. .
Mereghetti Sandro
Pellizzoni Alberto
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