Chandra observations of the recurrent nova IM Nor

Details Chandra observations of the recurrent nova IM Nor Chandra observations of the recurrent nova IM Nor

2004-11-08

arxiv.org/abs/astro-ph/0411162v1

Astrophys.J. 620 (2005) 938-942

Astronomy and Astrophysics

Astrophysics

To be published in the Astrophysical Journal 15 pages, 2 figures

Scientific paper

10.1086/427207

The recurrent nova IM Nor was observed twice in X-rays with Chandra ACIS-S, 1 and 6 months after the optical outburst. It was not detected in the first observation, with an upper limit on the X-ray luminosity in the 0.2-10 keV range L(x) < 4.8 x 10^(30) x (d/1 kpc)^2 erg s^(-1) (where d is the distance to the nova). Five months later, a hard X-ray source with L(x) = (1.4-2.5) x 10^(32) x (d/1 kpc)^2 erg s^(-1) was detected. The X-ray spectrum appears to be thermal, but we cannot rule out additional components due to unresolved emission lines. A blackbody component is likely to contribute to the observed spectrum, but it has bolometric luminosity L$_{\rm bol} = 2.5 x 10^(33) x (d/1 kpc)^2 erg s^(-1), therefore it is not sufficiently luminous to be due to a central white dwarf which is still burning hydrogen on the surface. An optical spectrum, taken 5 months post-outburst, indicates no intrinsic reddening of the ejecta. Therefore, we conclude that the shell had already become optically thin to supersoft X-rays, but nuclear burning had already turned off, or was in the process of turning off at this time. We discuss why this implies that recurrent novae, even the rare ones with long optical decays like IM Nor, indicating a large envelope mass, are not statistically significant as type Ia SN candidates.

Affiliated with

Also associated with

No associations

Rating

Chandra observations of the recurrent nova IM Nor 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 Chandra observations of the recurrent nova IM Nor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chandra observations of the recurrent nova IM Nor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-366321