J/MNRAS/424/2841 Morphology of supernova host galaxies (Habergham+, 2012)
A central excess of stripped-envelope supernovae within disturbed galaxies.
Habergham S.M., James P.A., Anderson J.P.
<Mon. Not. R. Astron. Soc., 424, 2841-2853 (2012)>
=2012MNRAS.424.2841H 2012MNRAS.424.2841H
ADC_Keywords: Supernovae ; Galaxy catalogs ; Morphology
Keywords: supernovae: general - galaxies: fundamental parameters -
galaxies: interactions - galaxies: starburst
Abstract:
This paper presents an analysis of core-collapse supernova
distributions in isolated and interacting host galaxies, paying close
attention to the selection effects involved in conducting host galaxy
supernova studies. When taking into account all of the selection
effects within our host galaxy sample, we draw the following
conclusions.
1. Within interacting, or 'disturbed', systems there is a real, and
statistically significant, increase in the fraction of
stripped-envelope supernovae in the central regions. A discussion into
what may cause this increased fraction, compared to the more common
Type IIP supernovae and Type II supernovae without subclassifications,
is presented. Selection effects are shown not to drive this result,
and so we propose that this study provides direct evidence for a
high-mass weighted initial mass function within the central regions of
disturbed galaxies.
2. Within 'undisturbed' spiral galaxies the radial distribution of
Type Ib and Type Ic supernovae is statistically very different, with
the latter showing a more centrally concentrated distribution. This
could be driven by metallicity gradients in these undisturbed
galaxies, or radial variations in other properties (binarity or
stellar rotation) driving envelope loss in progenitor stars. This
result is not found in 'disturbed' systems, where the distributions
of Type Ib and Ic supernovae are consistent.
Description:
Our data are drawn from observations of host galaxies indicated by SN
discoveries contained within the Padova-Asiago SN catalogue
(http://web.pd.astro.it/supern) and IAU
(http://www.cfa.harvard.edu/iau/lists/Supernovae.html) SN catalogues.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 42 237 The galaxy classification information for our sample
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Galaxy name
18 A1 --- Iso [X-?] Isolated flag
20 A1 --- Gni [X-?] Group - no interaction flag
22 A1 --- Gmi [X-?] Group - minor interaction flag
24 A1 --- GMi [X-?] Group - major interaction flag
26 A1 --- Am [X-?] Asymmetry - minor flag
28 A1 --- AM [X-?] Asymmetry - major flag
30 A1 --- S [X-?] Shells flag
32 A1 --- T [X-?] Tails flag
34 A1 --- Irr [X-?] Irregular structure flag
36 A1 --- Per [X-?] Perculiar dust lane flag
38 A1 --- Cl [X-?] Clumpy morphology flag
40 A1 --- Dbl [X-?] Double flag
42 A1 --- Std [X-?] Stardust flag
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 13-May-2013