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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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 28 309 Fractional fluxes at the locations of the WR stars
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
Bytes Format Units Label Explanations
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)
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.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 08-Nov-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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