J/ApJ/717/342 Type Ibc SNe in disturbed galaxies (Habergham+, 2010)
Type Ibc supernovae in disturbed galaxies: evidence for a top-heavy initial mass
function.
Habergham S.M., Anderson J.P., James P.A.
<Astrophys. J., 717, 342-347 (2010)>
=2010ApJ...717..342H 2010ApJ...717..342H
ADC_Keywords: Supernovae ; Galaxies, nearby ; Photometry, H-alpha
Keywords: galaxies: interactions - galaxies: ISM - supernovae: general
Abstract:
We compare the radial locations of 178 core-collapse supernovae
(CCSNe) to the R-band and Hα light distributions of their host
galaxies. When the galaxies are split into "disturbed" and
"undisturbed" categories, a striking difference emerges. The disturbed
galaxies have a central excess of CCSNe and this excess is almost
completely dominated by supernovae of types Ib, Ic, and Ib/c, whereas
type II supernovae dominate in all other environments. The difference
cannot easily be explained by metallicity or extinction effects, and
thus we propose that this is direct evidence for a stellar initial
mass function that is strongly weighted toward high-mass stars,
specifically in the central regions of disturbed galaxies.
Description:
The sample used in this work consists of 140 local (recession velocity
<6000km/s) spiral galaxies, hosts to 178 core-collapse supernovae
(CCSNe) (110 SNII and 68 SNIbc), for which we have Hα and R-band
observations from the Liverpool Telescope and Isaac Newton Telescope.
This is the same data set as used by Anderson & James
(2009MNRAS.399..559A 2009MNRAS.399..559A) with a small number of subsequent observations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 36 114 Undisturbed host galaxy sample used in this analysis
table2.dat 36 64 Disturbed host galaxy sample used in this analysis
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See also:
B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)
II/256 : Sternberg Supernova Catalogue, 2004 version (Tsvetkov+, 2004)
J/ApJS/197/20 : Relativistic EOS for core-collapse SN simulations (Shen+,
2011)
J/MNRAS/416/3138 : SN 2009jf light curves (Valenti+, 2011)
J/ApJ/708/661 : SDSS-II SN Survey: SNe II-P (D'Andrea+, 2010)
J/A+A/508/371 : UBVRIJHK observations of SN 2007gr (Hunter+, 2009)
J/MNRAS/394/2266 : SN 2005cs one-year photometry (Pastorello+, 2009)
J/ApJ/687/1201 : SN and LGRB locations in their host galaxies (Kelly+, 2008)
J/MNRAS/372/1315 : UBVRI photometry of SN 2004et (Sahu+, 2006)
J/PASP/115/1280 : Classifications of SN host galaxies (van den Bergh+, 2003)
http://www.cbat.eps.harvard.edu/lists/Supernovae.html : IAU list of SNe
Byte-by-byte Description of file: table[12].dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Host Host galaxy name
14- 19 A6 --- SN Supernova identification
21- 24 A4 --- SN.t Supernova type (II, IIL, IIP, IIn, Ib, Ic or Ib/c)
26- 30 F5.3 --- Fr(R) ? Fractional of R-band light within SN position
32- 36 F5.3 --- Fr(Ha) ? Fractional of Hα light within SN position
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 05-Jun-2012