Issue |
A&A
Volume 397, Number 1, January I 2003
|
|
---|---|---|
Page(s) | 227 - 236 | |
Section | Interstellar and circumstellar matter | |
DOI | https://doi.org/10.1051/0004-6361:20021480 | |
Published online | 11 December 2002 |
Near and Mid-infrared images of the massive star forming complex G9.62+0.19*
1
Istituto Astrofisica Spaziale e Fisica Cosmica, CNR, Via del Fosso del Cavaliere, 00133, Roma, Italy e-mail: persi@rm.iasf.cnr.it
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, persi@rm.iasf.cnr.it
Received:
26
April
2002
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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