Supernova Progenitors and a Light Echo in LEGUS Galaxies
Abstract
The Legacy ExtraGalactic UV Survey (LEGUS) is a Hubble Space Telescope (HST) Cycle 21 Treasury program, aimed at the investigation of star formation and its relation with galactic environment over a range of scales in 50 galaxies within 12 Mpc. It consists of five-band imaging, from the near-ultraviolet to the I-band, primarily with the Wide Field Camera 3. During the course of the Survey, two supernovae (SNe) happened to occur in galaxies in our sample, SN 2014bc in M106 and ASASSN-14ha in NGC 1566. The sites of these SNe were precisely established in these host galaxies via observations of the SNe as part of a separate Cycle 21 HST target-of-opportunity program. From the galaxy imaging data we have been able to place constraints on the nature of the progenitor stars for these two events. In addition, we report on the characterization, based on all five of the imaging bands, of a scattered light echo around the core-collapse SN 2012aw in the LEGUS galaxy M95. Support for GO-13364 and GO-13341 was provided by NASA through grants from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.
- Publication:
-
American Astronomical Society Meeting Abstracts #225
- Pub Date:
- January 2015
- Bibcode:
- 2015AAS...22514025V