Infrared studies of H II regions - The Sharpless regions S148, 184, 198, 206 and 269

Bibcode
1991MNRAS.249..385P
Pismis, Paris; Mampaso, Antonio
Bibliographical reference

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 249, April 1, 1991, p. 385-403. Research supported by Universidad Nacional Autonoma de Mexico and Ministerio de Educacion y Ciencia of Spain.

Advertised on:
4
1991
Number of authors
2
IAC number of authors
1
Citations
15
Refereed citations
15
Description
The results of a combined near-infrared and IRAS mapping study of five H II regions are presented for which fairly complete information at optical and radio wavelengths previously existed. The near-infrared observations, carried out with the 2.1-m telescope at Observatorio de San Pedro Martir (Mexico), made it possible to study the stellar content at the core of each nebula, while an analysis of extended near-infrared emission zones showed these to arise mainly from ionized gas (S148 and S206) or through scattering and thermal emission from dust grains surrounding a massive young star (S269-IRS2). The analysis of IRAS data, on the other hand, suggests that two different populations of grains contribute to the observed 12- to 100-micron fluxes, and these are modeled with a small sized, PAH-type, grain component plus the 'standard' interstellar silicate grains.
Type
Refereed
H II regions
Star formation
Stellar cores

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