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Core-collapse supernova progenitor constraints using the spatial distributions of massive stars in local galaxies

Kangas, T and Portinari, L and Mattila, S and Fraser, M and Kankare, E and Izzard, RG and James, PA and González-Fernández, C and Maund, JR and Thompson, A (2017) Core-collapse supernova progenitor constraints using the spatial distributions of massive stars in local galaxies. Astronomy and Astrophysics, 597 (A92). ISSN 0004-6361

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Abstract

© 2017 ESO.We studied the spatial correlations between the Hα emission and different types of massive stars in two local galaxies, the Large Magellanic Cloud (LMC) and Messier 33. We compared these to correlations derived for core-collapse supernovae (CCSNe) in the literature to connect CCSNe of different types with the initial masses of their progenitors and to test the validity of progenitor mass estimates which use the pixel statistics method. We obtained samples of evolved massive stars in both galaxies from catalogues with good spatial coverage and/or completeness, and combined them with coordinates of main-sequence stars in the LMC from the SIMBAD database. We calculated the spatial correlation of stars of different classes and spectral types with Hα emission. We also investigated the effects of distance, noise and positional errors on the pixel statistics method. A higher correlation with Hα emission is found to correspond to a shorter stellar lifespan, and we conclude that the method can be used as an indicator of the ages, and therefore initial masses, of SN progenitors. We find that the spatial distributions of type II-P SNe and red supergiants of appropriate initial mass (≥ 9 MṀ) are consistent with each other. We also find the distributions of type Ic SNe and WN stars with initial masses ≥ 20 MṀ consistent, while supergiants with initial masses around 15 MṀ are a better match for type IIb and II-L SNe. The type Ib distribution corresponds to the same stellar types as type II-P, which suggests an origin in interacting binaries. On the other hand, we find that luminous blue variable stars show a much stronger correlation with Hα emission than do type IIn SNe.

Item Type: Article
Uncontrolled Keywords: 0201 Astronomical And Space Sciences
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
Date Deposited: 06 Feb 2017 10:04
Last Modified: 07 Sep 2017 16:02
DOI or Identification number: 10.1051/0004-6361/201628705
URI: http://researchonline.ljmu.ac.uk/id/eprint/5436

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