Infrared observations of compact H II regions in the spectral range 3.4 - 33 micrometers. (original) (raw)

NASA/ADS

Abstract

We have obtained photometry of 17 compact infrared sources in five galactic H ii regions (W3, W33, W48, WSl, and W7S) in the spectral range from 3.4 to 33 m. We find: (1) flux spectra that continue to rise at wavelengths beyond 20 m for many objects; (2) luminosities that are considerably higher than estimates based on data extending to 20 m; and (3) complex behavior in the spectra between 20 and 33 m that is not simply related to the depth of the 10 m silicate absorption. A cluster of three luminous infrared sources has been discovered coincident with the compact radio source in W33. Infrared emission has also been found associated with the maser source W33 A and with W3(D). Subject headings: infrared: sources - nebulae: general - stars: -sequence

Publication:

The Astrophysical Journal

Pub Date:

January 1977

DOI:

10.1086/154947

Bibcode:

1977ApJ...211..421D

Keywords: