J/A+A/518/A29 Distribution of WR stars in 2 nearby galaxies (Leloudas+, 2010)
Do Wolf-Rayet stars have similar locations in hosts as type Ib/c supernovae and
long gamma-ray bursts?
Leloudas G., Sollerman J., Levan A.J., Fynbo J.P.U., Malesani D.,
Maund J.R.
<Astron. Astrophys., 518, A29-29 (2010)>
=2010A&A...518A..29L 2010A&A...518A..29L
ADC_Keywords: Galaxies, nearby ; Stars, variable
Keywords: supernovae: general - stars: Wolf-Rayet - gamma-ray burst: general
Abstract:
We study the distribution of Wolf-Rayet (WR) stars and their subtypes
with respect to their host galaxy light distribution. We thus want to
investigate whether WR stars are potential progenitors of
stripped-envelope core-collapse supernovae (SNe) and/or long-duration
gamma-ray bursts (LGRBs).
Description:
We derived the relative surface brightness (fractional flux) at the
locations of WR stars and compared with similar results for LGRBs and
SNe. We examined two nearby galaxies, M 83 and NGC 1313, for which a
comprehensive study of the WR population exists. These two galaxies
contain a sufficiently large number of WR stars and sample different
metallicities. To enable the comparison, the images of the galaxies
were processed to make them appear as they would look at a higher
redshift. The robustness of our results against several sources of
uncertainty was investigated with the aid of Monte Carlo simulations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 28 309 Fractional fluxes at the locations of the WR stars
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See also:
J/A+A/439/265 : Wolf-Rayet population in M83 (Hadfield+, 2005)
J/MNRAS/381/418 : Wolf-Rayet population in NGC 1313 (Hadfield+, 2007)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Gal Galaxy name (M 83 or NGC 1313)
10- 12 I3 --- Region Region sequential number within the galaxy (1)
14- 18 A5 --- SpT WR subtype or "cand." for candidate region (2)
20 A1 --- n_SpT [a] a for stars classified as WN5-6 and
included in the WNE distribution
21- 23 I3 --- Nstar ? Number of stars in the region with this
WR sub-type
25- 28 F4.2 --- FF Fractional flux (relative surface brightness) (3)
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Note (1): We follow the exact numbering of Hadfield et al. (2005, Cat.
J/A+A/439/265, <[HCS2005] NNN> in Simbad) and Hadfield & Crowther
(2007, Cat. J/MNRAS/381/418, <[HC2007] NN> in Simbad). Additional
info (e.g. fluxes, errors in star numbers) can be found in these
references.
Note (2): Subtypes as follows:
WCE = early WC type
WCL = late WC type
WNE = early WN type
WNL = late WN type
cand. = candidate region
Note (3): These fractional fluxes refer to a binning of 15 and 19 for the
images of M 83 and NGC 1313 we have used, respectively. Although we
have shown that the results do not change significantly with the
choice of binning, individual fractional fluxes can vary.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 08-Nov-2010