Bibcode
García, M.
Referencia bibliográfica
Astrophysics and Space Science, Volume 335, Issue 1, pp.131-136
Fecha de publicación:
9
2011
Revista
Número de citas
0
Número de citas referidas
0
Descripción
The Local Group galaxies enable us to study the impact of metallicity on
the structure and evolution of massive stars through spectroscopic
analyses. However, color-based target selection for spectroscopy (in
absence of known spectral types), though relatively successful, usually
produces lists dominated by B-type modest-mass stars. We have developed
a friends of friends code to find OB associations in Local Group
galaxies (Garcia et al. in Astron. Astrophys. 502:1015, 2009; Bull. Soc.
R. Sci. Liege 80:381, 2011a). The interpretation of the association's
color-magnitude diagrams (CMDs) and the automatic determination of
evolutionary masses for the members, allow a more insightful choice of
candidates for spectroscopy and to spot out potential advanced
evolutionary stages (Garcia et al. in Astron. Astrophys. 523:A23, 2010).
We show our results on the dwarf irregular IC 1613 as illustration of
the potential of the method. Because of its large field of view and high
spatial resolution at ultraviolet (UV) wavelengths, ISSIS at the WSO is
a powerful discovery machine of resolved blue massive stars in nearby
galaxies. Our code can be easily modified to choose candidate OB stars
based on ISSIS magnitudes on the UV, where hot young massive stars are
intrinsically brighter and their color degeneracy is broken. The
combination of our algorithm and ISSIS's panchromatic photometry can
readily produce a list of the most massive stars of the Local Group.
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