- Portada
- Volume 80 - Année 2011
- New Results from the Project MASGOMAS: Near-IR Study of the Stellar Population of Sh2-152
Vista(s): 671 (7 ULiège)
Descargar(s): 450 (11 ULiège)
New Results from the Project MASGOMAS: Near-IR Study of the Stellar Population of Sh2-152
Documento adjunto(s)
Anexidades
Abstract
We present a near-IR and optical spectrophotometric characterization of the stellar population of Sh2-152, as part of our MASGOMAS project. Using new broad band photometry (J, H and KS) for the cluster and a control field, we have constructed CMD in order to select OB-candidates for H and K spectroscopy. Also, we have obtained the cluster mass function, with the disc population subtracted using the control field mass function. From the 13 spectroscopically observed stars, 6 were classified as B-dwarfs and with individual distance and extinction estimations. With these values we have obtained estimations for the distance (3.01 ± 0.11) kpc, mass (1.86 ± 0.83)·103 Mo and age < 8.1 Myr for Sh2-152. We also present a new optical spectrum for the central ionizing star of Sh2-152, showing some peculiarities associated to this central object and shed some light over the interesting star deeply embedded into the bright KS nebulosity close to the IRAS source IRAS 22566+5828.
Para citar este artículo
Acerca de: Sebastián Ramírez Alegría
Instituto de Astrofísica de Canarias, E-38205,Tenerife, Spain, and Universidad de La Laguna, E-38207, Tenerife, Spain
Acerca de: Artemio Herrero
Instituto de Astrofísica de Canarias, E-38205,Tenerife, Spain, and Universidad de La Laguna, E-38207, Tenerife, Spain
Acerca de: Antonio Marín-Franch
Centro de Estudios de Física del Cosmos de Aragón (CEFCA), E-44001, Teruel, Spain, and Departamento de Astrofísica, Universidad Complutense de Madrid, E-28040, Madrid, Spain
Acerca de: Elena Puga
Centro de Astrobiología (CSIC-INTA), E-28850, Torrejón de Ardoz, Madrid, Spain
Acerca de: Francisco Najarro
Centro de Astrobiología (CSIC-INTA), E-28850, Torrejón de Ardoz, Madrid, Spain