Searching for the Progenitor of the Type Ib Supernova 2010O

Details Searching for the Progenitor of the Type Ib Supernova 2010O Searching for the Progenitor of the Type Ib Supernova 2010O

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009hst..prop12295b&link_type=abstract

HST Proposal ID #12295. Cycle 18

Astronomy and Astrophysics

Astronomy

Scientific paper

Several progenitor stars of Type II supernovae {SNe} have been identified in archival pre-explosion HST images. All of them are consistent with being red supergiants, as had been expected but never actually confirmed until the advent of HST imaging.The hydrogen-deficient Type Ib and Ic SNe are in a less satisfactory state. They are believed to be core-collapse SNe arising from massive stars that have lost their H envelopes. Unfortunately, though, there has never been an identified progenitor of an SN Ib or Ic, so it remains uncertain whether they are massive Wolf-Rayet stars, or less-massive stars in interacting binaries. The appearance of the Type Ib SN 2010O, in the starburst interacting galaxy NGC 3690 {Arp 299}, offers a tantalizing new opportunity. NGC 3690 has been the subject of extensive HST observations, ranging from the UV and optical to the near-IR. We obtained ground-based images of SN 2010O, and find that there is a blue cluster in the archival HST images close to the nominal SN position. If the SN did indeed arise in this cluster, its spectral energy distribution, obtained from the HST archival data, constrains the turnoff mass to about 14 Msun. SN 2010O has also become even more interesting because of its close proximity to a variable X-ray source discovered by our team in pre-explosion Chandra images. Both of these findings would support the interacting-binary origin of this SN Ib.The astrometric precision possible from our ground-based images is insufficient to verify the location of SN 2010O conclusively. We therefore propose a set of short WFC3 exposures, while the SN is still luminous, in order to confirm the association of the SN with the young cluster and with the X-ray source.;

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