The birth place of the type Ic Supernova 2007gr

Details The birth place of the type Ic Supernova 2007gr The birth place of the type Ic Supernova 2007gr

2007-09-14

arxiv.org/abs/0709.2354v3

Astrophys.J. 672 (2008) L99-L102

Astronomy and Astrophysics

Astrophysics

12 pages, 3 figures, resolution of fig 1. has been reduced, some revision based on referee's comments, Accepted ApJL 27 Nov 20

Scientific paper

10.1086/527299

We report our attempts to locate the progenitor of the peculiar type Ic SN 2007gr in HST pre-explosion images of the host galaxy, NGC 1058. Aligning adaptive optics Altair/NIRI imaging of SN 2007gr from the Gemini (North) Telescope with the pre-explosion HST WFPC2 images, we identify the SN position on the HST frames with an accuracy of 20 mas. Although nothing is detected at the SN position we show that it lies on the edge of a bright source, 134+/-23 mas (6.9 pc) from its nominal centre. Based on its luminosity we suggest that this object is possibly an unresolved, compact and coeval cluster and that the SN progenitor was a cluster member, although we note that model profile fitting favours a single bright star. We find two solutions for the age of this assumed cluster; 7-/+0.5 Myrs and 20-30 Myrs, with turn-off masses of 28+/-4 Msun and 12-9 Msun respectively. Pre-explosion ground-based K-band images marginally favour the younger cluster age/higher turn-off mass. Assuming the SN progenitor was a cluster member, the turn-off mass provides the best estimate for its initial mass. More detailed observations, after the SN has faded, should determine if the progenitor was indeed part of a cluster, and if so allow an age estimate to within ~2 Myrs thereby favouring either a high mass single star or lower mass interacting binary progenitor.

Affiliated with

Also associated with

No associations

Rating

The birth place of the type Ic Supernova 2007gr 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 The birth place of the type Ic Supernova 2007gr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The birth place of the type Ic Supernova 2007gr will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-616966