SIMBAD references

2016MNRAS.460.1555G - Mon. Not. R. Astron. Soc., 460, 1555-1566 (2016/August-1)

Wolf-Rayet stars in M81: detection and characterization using GTC/OSIRIS spectra and HST/ACS images.


Abstract (from CDS):

We here report the properties of Wolf-Rayet (W-R) stars in 14 locations in the nearby spiral galaxy M81. These locations were found serendipitously while analysing the slit spectra of a sample of ∼150 star-forming complexes, taken using the long-slit and multiobject spectroscopic modes of the OSIRIS instrument at the 10.4-m Gran Telescopio Canarias. Colours and magnitudes of the identified point sources in the Hubble Space Telescope images compare well with those of individual W-R stars in the Milky Way. Using templates of individual W-R stars, we infer that the objects responsible for the observed W-R features are single stars in 12 locations, comprising of three WNLs, three WNEs, two WCEs and four transitional WN/C types. In diagrams involving bump luminosities and the width of the bumps, the W-R stars of the same sub-class group together, with the transitional stars occupying locations intermediate between the WNE and WCE groups, as expected from the evolutionary models. However, the observed number of 4 transitional stars out of our sample of 14 is statistically high as compared to the 4 per cent expected in stellar evolutionary models.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: Wolf-Rayet - galaxies: individual: M81 - galaxies: star clusters: general - galaxies: star clusters: general

Nomenclature: Table 2: [GMR2016] WRNN (Nos 1-14).

CDS comments: Table 2: the 'kaufNNN' (=[KBK87] NNN) complex are not in SIMBAD.

Simbad objects: 38

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