Volume 397, Number 1, January I 2003
|Page(s)||227 - 236|
|Section||Interstellar and circumstellar matter|
|Published online||11 December 2002|
Near and Mid-infrared images of the massive star forming complex G9.62+0.19*
Istituto Astrofisica Spaziale e Fisica Cosmica, CNR, Via del Fosso del Cavaliere, 00133, Roma, Italy e-mail: email@example.com
2 Instituto de Astronomía, UNAM, Apartado Postal 877, Ensenada, Baja California, CP 22833, Mexico
3 Harvard-Smithsonian Center for Astrophysics, 60 Garden St, Cambridge, MA 02138, USA
4 Las Campanas Observatory, Carnegie Institution of Washington, Casilla 601, La Serena, Chile
5 Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
6 European Southern Observatory, Alonso de Cordoba 3107, Santiago, Chile
Corresponding author: P. Persi, firstname.lastname@example.org
Accepted: 8 October 2002
A near- and mid-infrared study of the star formation complex G9.62+0.19 is presented. It includes photometrically calibrated images through wide-band JHK and narrow-band Brγ, H2 and 12.5 filters. These were taken at Las Campanas, La Silla and OAN-San Pedro Mártir. We found evidence of two embedded young clusters of O-B5 stars associated with the radio components B and C, one compact and one ultracompact HII region. The data suggest the presence of a third, more dispersed cluster of more luminous infrared stars at the southern edge of the cloud complex. A large fraction of the star members of each cluster exhibit significant infrared excess. We confirm the detection of a very red near- and mid-infrared source immersed in the molecular hot core (component F). An H2 shocked gas knot, probably an obscured Herbig-Haro object, was found associated to the blue-shifted lobe of the high-velocity molecular outflow in this core. The properties of the individual sources are discussed in detail.
Key words: stars: formation / infrared: stars
© ESO, 2003
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