Bibcode
Castro, N.; Herrero, A.; Garcia, M.; Trundle, C.; Bresolin, F.; Gieren, W.; Pietrzyński, G.; Kudritzki, R.-P.; Demarco, R.
Referencia bibliográfica
Astronomy and Astrophysics, Volume 485, Issue 1, 2008, pp.41-50
Advertised on:
7
2008
Revista
Número de citas
29
Número de citas referidas
25
Descripción
Aims: This is the first paper of a series devoted to studying the
population of blue massive stars in NGC 55, a galaxy of the Sculptor
group at a distance of about 2 Mpc. Methods: We have obtained
optical (3300{-}6210 Å), low-resolution spectra of approximately
200 blue massive stars with VLT-FORS2, which we have classified with the
aid of Milky Way and Magellanic Cloud standard stars. Results: We
present the first census of massive blue stars in NGC 55. A study of
stellar radial velocities shows agreement with existing H I rotational
velocity curve work and reveals the presence of one object with peculiar
velocity. A qualitative study of the stellar metallicity suggests that
its global distribution over NGC 55 is close to that of the LMC, as
derived from previous studies. Conclusions: We present a
catalogue with 164 classifications of blue massive stars in NGC 55. This
catalogue is a first and necessary step for the subsequent quantitative
study of blue massive stars in NGC 55 with state-of-the-art model
atmospheres.
Based on observations obtained at
the ESO VLT for Large Programme 171.D-0004.
Appendices A-C are only available in electronic form at
http://www.aanda.org
Proyectos relacionados
![Physical properties and evolution of massive stars Physical properties and evolution of massive stars](/sites/default/files/styles/crop_square_2_2_to_320px/public/images/project/BMS_web.jpg?h=77f09be6&itok=IN9Ar1ae)
Propiedades Físicas y Evolución de Estrellas Masivas
Las estrellas masivas son objetos claves para la Astrofísica. Estas estrellas nacen con más de 8 masas solares, lo que las condena a morir como Supernovas. Durante su rápida evolución liberan, a través de fuertes vientos estelares, gran cantidad de material procesado en su núcleo y, en determinadas fases evolutivas, emiten gran cantidad de
Sergio
Simón Díaz