Journal article
Progenitors of Type IIb Supernovae. II. Observable Properties
The Astrophysical journal, v 903(1), p70
01 Nov 2020
Abstract
Type IIb supernovae (SNe IIb) present a unique opportunity for investigating the evolutionary channels and mechanisms governing the evolution of stripped-envelope SN progenitors due to a variety of observational constraints. Comparison of these constraints with the full distribution of theoretical properties not only helps determine the prevalence of observed properties in nature, but can also reveal currently unobserved populations. In this follow-up paper, we use the large grid of models presented in Sravan et al. to derive distributions of single and binary SNe IIb progenitor properties and compare them to constraints from three independent observational probes: multiband SN light curves, direct progenitor detections, and X-ray/radio observations. Consistent with previous work, we find that while current observations exclude single stars as SN IIb progenitors, SN IIb progenitors in binaries can account for them. We also find that the distributions indicate the existence of an unobserved dominant population of binary SNe IIb at low metallicity that arise due to mass transfer initiated on the Hertzsprung Gap. In particular, our models indicate the existence of a group of highly stripped (envelope mass ∼0.1-0.2M☉) progenitors that are compact (<50R☉) and blue (Teff 105 K) with ∼104.5-105.5 L☉ and low-density circumstellar mediums. As discussed in Sravan et al., this group is necessary to account for SN IIb fractions and likely exist regardless of metallicity. The detection of the unobserved populations indicated by our models would support weak stellar winds and inefficient mass transfer in SN IIb progenitors.
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Details
- Title
- Progenitors of Type IIb Supernovae. II. Observable Properties
- Creators
- Niharika Sravan - Purdue University West LafayettePablo Marchant - KU LeuvenVassiliki Kalogera - Northwestern UniversityDan Milisavljevic - Purdue University West LafayetteRaffaella Margutti - Northwestern University
- Publication Details
- The Astrophysical journal, v 903(1), p70
- Publisher
- The American Astronomical Society
- Number of pages
- 11
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000584940100001
- Scopus ID
- 2-s2.0-85095852933
- Other Identifier
- 991021877361604721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics