Journal
ASTRONOMICAL JOURNAL
Volume 146, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-6256/146/2/30
Keywords
stars: massive; supernovae: general
Categories
Funding
- National Astronomical Observatory of Japan
- JSPS core-to core program International Research Network for Dark Energy
- JSPS
- World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan
- Office of Science, Office of High Energy Physics, of the U.S. Department of Energy [DE-AC02-05CH11231]
- National Aeronautics and Space Administration
- [23740141]
- Grants-in-Aid for Scientific Research [23340041, 24103003, 25800103, 23224005, 23740141] Funding Source: KAKEN
Ask authors/readers for more resources
Integral field spectroscopy of 11 Type Ib/Ic supernova (SN Ib/Ic) explosion sites in nearby galaxies has been obtained using UH88/SNIFS and Gemini-N/GMOS. The use of integral field spectroscopy enables us to obtain both spatial and spectral information about the explosion site, enabling the identification of the parent stellar population of the SN progenitor star. The spectrum of the parent population provides metallicity determination via strong-line method and age estimation obtained via comparison with simple stellar population models. We adopt this information as the metallicity and age of the SN progenitor, under the assumption that it was coeval with the parent stellar population. The age of the star corresponds to its lifetime, which in turn gives the estimate of its initial mass. With this method we were able to determine both the metallicity and initial (zero-age main sequence) mass of the progenitor stars of SNe Ib and Ic. We found that on average SN Ic explosion sites are more metal-rich and younger than SN Ib sites. The initial mass of the progenitors derived from parent stellar population age suggests that SN Ic has more massive progenitors than SN Ib. In addition, we also found indication that some of our SN progenitors are less massive than similar to 25M(circle dot), indicating that they may have been stars in a close binary system that have lost their outer envelope via binary interactions to produce SNe Ib/Ic, instead of single Wolf-Rayet stars. These findings support the current suggestions that both binary and single progenitor channels are in effect in producing SNe Ib/Ic. This work also demonstrates the power of integral field spectroscopy in investigating SN environments and active star-forming regions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available