Identification campaign of supernova remnant candidates in the Milky Way - I: Chandra observation of G308.3-1.4

Details Identification campaign of supernova remnant candidates in the Milky Way - I: Chandra observation of G308.3-1.4 Identification campaign of supernova remnant candidates in the Milky Way - I: Chandra observation of G308.3-1.4

2012-02-19

arxiv.org/abs/1202.4176v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

19 pages, 10 figures, 2 tables, accepted for publication in ApJ

Scientific paper

ROSAT all-sky survey (RASS) data have provided another window to search for supernova remnants (SNRs). In reexamining this data archive, a list of unidentified extended X-ray objects have been suggested as promising SNR candidate. However, most of these targets have not yet been fully explored by the state-of-art X-ray observatories. For selecting a pilot target for a long-term identification campaign, we have observed the brightest candidate, G308.3-1.4, with Chandra X-ray observatory. An incomplete shell-like X-ray structure which well-correlated with the radio shell emission at 843 MHz has been revealed. The X-ray spectrum suggests the presence of a shock-heated plasma. All these evidences confirm G308.3-1.4 as a SNR. The brightest X-ray point source detected in this field-of-view is also the one locates closest to the geometrical center of G308.3-1.4, which has a soft spectrum. The intriguing temporal variability and the identification of optical/infrared counterpart rule out the possibility of an isolated neutron star. On the other hand, the spectral energy distribution from Ks band to R band suggests a late-type star. Together with a putative periodicity of \sim1.4 hrs, the interesting excesses in V, B bands and H-alpha suggest this source as a promising candidate of a compact binary survived in a supernova explosion (SN).

Affiliated with

Also associated with

No associations

Rating

Identification campaign of supernova remnant candidates in the Milky Way - I: Chandra observation of G308.3-1.4 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Identification campaign of supernova remnant candidates in the Milky Way - I: Chandra observation of G308.3-1.4, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Identification campaign of supernova remnant candidates in the Milky Way - I: Chandra observation of G308.3-1.4 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-419618