IALP   13078
INSTITUTO DE ASTROFISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
A Multifrequency Study Of The Active Star Forming Region NGC 6357
Autor/es:
C. CAPPA; R. BARBÁ; E.M. ARNAL; N. DURONEA; E. FERNÁNDEZ LAJÚS; W.M.GOSS; J. VÁSQUEZ
Lugar:
Praga, República Checa
Reunión:
Simposio; Triggered Star Formation in a Turbulent ISM, International Astronomical Union. Symposium no. 237; 2006
Institución organizadora:
International Astronomical Union
Resumen:
We investigate the distribution of the ionized, atomic neutral and
molecular gas, and of the interstellar dust in the complex star forming
region NGC 6357, with the aim of studying the interplay between the
massive stars and the surrounding interstellar matter. We based the
study of the ionized gas on narrow-band optical images (Hα, [SII],
[OIII]) obtained with the Curtis-Schmidt Camera at CTIO, Chile, and on
radio continuum observations at 1465 MHz taken with the VLA, USA, with a
synthesized beam of 40 seconds of arc. The distribution of the neutral
atomic gas is analyzed using HI 21cm line data from the Southern
Galactic Plane Survey obtained with the ATCA and Parkes radiotelescopes
(synthesized beam = 2.3 minutes of arc). The distribution of the
molecular gas was investigated using CO(1-0) data obtained with the
Nanten radiotelescope (angular resolution = 2.7 minutes of arc), in
Chile. The interstellar dust distribution was studied using infrared
data from the IRAS satellite (HIRES) and MSX. The images show neutral
atomic and molecular gas with velocities in the range -12 to +1 km/s
associated with the outer ionized nebula. A detailed analysis of the
region reveals the presence of interstellar bubbles and
photodissociation regions created by the massive stars in the open
cluster Pis 24 and by undiscovered ionizing sources