Sh2-205:II. Its quiescent stellar formation activity

GISELA A. ROMERO; C.E. CAPPA

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

WILEY-BLACKWELL PUBLISHING, INC

Año: 2009 vol. 395 p. 2095 - 2102

0035-8711

We present a study of active stellar forming regions in the environs of the HII region Sh2-205. The analysis is based on data obtained from point source catalogues and images extracted from 2MASS, MSX, and IRAS surveys. Complementary data are taken from CO survey. The identification of primary candidates to stellar formation activity is made following colour criteria and the correlation with molecular gas emission.A number of stellar formation tracer candidates are projected on two substructures of the HII region: SH148.83--0.67 and SH149.25--0.00. However, the lack of molecular gas related to these structures casts doubts on the nature of the sources. Additional infrared sources may be associated with the HII~shell centered at (l,b) = (149degr 0arcmin, --1degr 30arcmin). The most striking active area was found in connection to the HII region LBN 148.11--0.45, where stellar formation candidates are projected onto molecular gas. The analytical model to the "collect and collapse" process shows that stellar formation activity could have been triggered by the expansion of this HII region.