Bibcode
Maíz Apellániz, J.; Trigueros Páez, E.; Negueruela, I.; Barbá, R. H.; Simón-Díaz, S.; Lorenzo, J.; Sota, A.; Gamen, R. C.; Fariña, C.; Salas, J.; Caballero, J. A.; Morrell, N. I.; Pellerin, A.; Alfaro, E. J.; Herrero, A.; Arias, J. I.; Marco, A.
Referencia bibliográfica
Astronomy and Astrophysics, Volume 626, id.A20, 39 pp.
Fecha de publicación:
6
2019
Revista
Número de citas
50
Número de citas referidas
44
Descripción
Context. Multiplicity in massive stars is key to understanding the
chemical and dynamical evolution of galaxies. Among massive stars, those
of O type play a crucial role due to their high masses and short
lifetimes. Aims: MONOS (Multiplicity Of Northern O-type
Spectroscopic systems) is a project designed to collect information and
study O-type spectroscopic binaries with δ > -20°. In this
first paper we describe the sample and provide spectral classifications
and additional information for objects with previous spectroscopic
and/or eclipsing binary orbits. In future papers we will test the
validity of previous solutions and calculate new spectroscopic orbits.
Methods: The spectra in this paper have two sources: the Galactic
O-Star Spectroscopic Survey (GOSSS), a project that obtains blue-violet
R ˜ 2500 spectroscopy of thousands of massive stars, and
LiLiMaRlin, a library of libraries of high-resolution spectroscopy of
massive stars obtained from four different surveys (CAFÉ-BEANS,
OWN, IACOB, and NoMaDS) and additional data from our own observing
programs and public archives. We have also used lucky images obtained
with AstraLux. Results: We present homogeneous spectral
classifications for 92 O-type spectroscopic multiple systems and ten
optical companions, many of them original. We discuss the visual
multiplicity of each system with the support of AstraLux images and
additional sources. For eleven O-type objects and for six B-type objects
we present their first GOSSS spectral classifications. For two known
eclipsing binaries we detect double absorption lines (SB2) or a single
moving line (SB1) for the first time, to which we add a third system
reported by us recently. For two previous SB1 systems we detect their
SB2 nature for the first time and give their first separate spectral
classifications, something we have also done for a third object just
recently identified as a SB2. We also detect nine new astrometric
companions and provide updated information on several others. We
emphasize the results for two stars: for σ Ori AaAbB we provide
spectral classifications for the three components with a single
observation for the first time thanks to a lucky spectroscopy
observation obtained close to the Aa,Ab periastron and for
θ1 Ori CaCb we add it to the class of Galactic Of?p
stars, raising the number of its members to six. Our sample of O-type
spectroscopic binaries contains more triple- or higher-order systems
than double systems.
Table A.2 is also available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr
(ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/626/A20
Proyectos relacionados
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