IALP   13078
INSTITUTO DE ASTROFISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
"Unveiling new associations in Puppis"
Autor/es:
A.M. ORSATTI; A.M. ORSATTI; VEGA, E. IRENE; VEGA, E. IRENE; MARTINEZ, R. E.; MARTINEZ, R. E.
Revista:
REVISTA MEXICANA DE ASTRONOMíA Y ASTROFíSICA
Editorial:
UNIV NACIONAL AUTONOMA MEXICO
Referencias:
Lugar: México; Año: 2016 vol. 52 p. 55 - 67
ISSN:
0185-1101
Resumen:
A combined photometric and polarimetric analysis of OB stars known fromtwo searches of OB stars in the Puppis region resulted in the identification of anew OB association located at a distance of 2.6 kpc from the Sun and with a mainconcentration at l = 249.3, b = −4.6. There is another young group at a greaterdistance (4.4 kpc) that partially overlaps the first one on the (l, b) plane. The polarizationefficiency of the dust towards the association is very low (1.25). The parametersof the ISM in the central region of the association are PV = 1.21 ± 0.18(%)and V = 140.2 ± 3.3; the dust grains are of normal size, similar to the mean forthe ISM (0.55 μm). We discuss the location of both groups and propose the OBassociation as part of the local arm, while the other group would be part of thePerseus arm, according to the four-arm model of Hou & Han.