University of Surrey

Test tubes in the lab Research in the ATI Dance Research

On the nature and detectability of Type Ib/c supernova progenitors

Yoon, S.-C., Gräfener, G., Vink, J. S., Kozyreva, A. and Izzard, Robert (2012) On the nature and detectability of Type Ib/c supernova progenitors Astronomy & Astrophysics, 544.

Full text not available from this repository.


Context. The progenitors of many Type II supernovae have been observationally identified but the search for Type Ibc supernova (SN Ibc) progenitors has thus far been unsuccessful, despite the expectation that they are luminous Wolf-Rayet (WR) stars. Aims. We investigate how the evolution of massive helium stars affects their visual appearances, and discuss the implications for the detectability of SN Ibc progenitors. Methods. Evolutionary models of massive helium stars are analysed and their properties compared to Galactic WR stars. Results. Massive WR stars that rapidly lose their helium envelopes through stellar-wind mass-loss end their lives when their effective temperatures – related to their hydrostatic surfaces – exceed about 150 kK. At their pre-supernova stage, their surface properties resemble those of hot Galactic WR stars of WO sub-type. These are visually faint with narrow-band visual magnitudes Mv = −1.5 ···     −2.5, despite their high bolometric luminosities (log L/L⊙ = 5.6···5.7), compared to the bulk of Galactic WR stars (Mv < −4). In contrast, relatively low-mass helium stars that retain a thick helium envelope appear fairly bright in optical bands, depending on the final masses and the history of the envelope expansion during the late evolutionary stages. Conclusions. We conclude that SNe Ibc observations have so far not provided strong constraints on progenitor bolometric luminosities and masses, even with the deepest searches. We also argue that Ic progenitors are more challenging to identify than Ib progenitors in any optical images.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
Yoon, S.-C.
Gräfener, G.
Vink, J. S.
Kozyreva, A.
Date : 7 August 2012
DOI : 10.1051/0004-6361/201219790
Depositing User : Karen Garland
Date Deposited : 04 Oct 2018 15:59
Last Modified : 04 Oct 2018 15:59

Actions (login required)

View Item View Item


Downloads per month over past year

Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800