Spitzer-IRAC imagery and photometry of Ultracompact H II regions with Extended Emission
Por:
De La Fuente E., Porras A., Grave J.M.C., Kumar M.S.N., Trinidad M.A., Kurtz S., Kemp S., Franco J., Quevedo G.
Publicada:
1 ene 2010
Resumen:
We present the results of a morphological study performed to a sample of Ultracompact (UC) H II regions with Extended Emission (EE) using Spitzer-IRAC imagery and 3.6 cm VLA conf. D radio-continuum (RC) maps. Some examples of the comparison between maps and images are presented. Usually there is an IR point source counterpart to the peak(s) of RC emission, at the position of the UC H II source. We find that the predominant EE morphology is the cometary, and in most cases is coincident with IR emission at 8.0 ?m. Preliminary results of Spitzer-IRAC photometry of a sub-sample of 13 UC H II regions with EE (UC H II + EE) based on GLIMPSE legacy data are also presented. Besides, individual IRAC photometry was performed to 19 UC H II sources within these 13 regions. We show that UC H II sources lie on specific locus, both in IRAC color-color and AM-product diagnostic diagrams. Counts of young stellar sources are presented for each region, and we conclude that a proportion of ?2%, ?10%, and ?88% of sources in UC H II + EEare, in average, Class I, II, and III, respectively. © 2010: Instituto de Astronomía, UNAM.
Filiaciones:
De La Fuente E.:
Instituto de Astronomía y Metereología, CUCEI, Universidad de Guadalajara, Av. Vallarta 2602, C.P., 44130 Guadalajara, Jallisco, Mexico
Porras A.:
Instituto Nacional de Astrofísica, Óptica y Electrónica, Luis E. Erro Num. 1, Tonantzintla Puebla, Mexico
Grave J.M.C.:
Centro de Astrofísica, Universidade Do Porto, Rua das Estrelas, 4150-762 Porto, Portugal
Kumar M.S.N.:
Centro de Astrofísica, Universidade Do Porto, Rua das Estrelas, 4150-762 Porto, Portugal
Trinidad M.A.:
Departamento de Astronomía, Universidad de Guanajuato, P.O. Box 144, Guanajuato, Guanajuato 36000, Mexico
Kurtz S.:
Centro de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México, Apdo. Postal 3-72, Morelia, Michoacan 58089, Mexico
Kemp S.:
Instituto de Astronomía y Metereología, CUCEI, Universidad de Guadalajara, Av. Vallarta 2602, C.P., 44130 Guadalajara, Jallisco, Mexico
Franco J.:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo. Postal 70-264, 04510 México, D.F., Mexico
Quevedo G.:
Instituto de Astronomía y Metereología, CUCEI, Universidad de Guadalajara, Av. Vallarta 2602, C.P., 44130 Guadalajara, Jallisco, Mexico
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