THE W40 REGION IN THE GOULD BELT: AN EMBEDDED CLUSTER AND H II REGION AT THE JUNCTION OF FILAMENTS

• Published in: The Astrophysical journal Vol. 779; no. 2; pp. 1 - 17
• Main Authors: Mallick, K K, Kumar, M S N, Ojha, D K, Bachiller, Rafael, Samal, M R, Pirogov, L
• Format: Journal Article
• Language: English
• Published: United States American Astronomical Society 20.12.2013
• Subjects: Arrays; Astrophysics; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; Bands; Clusters; CONNECTORS; Continuums; DENSITY; ELECTRIC CONTACTS; ENERGY SPECTRA; FILAMENTS; FLUORESCENCE; Infrared; MASS; PERTURBED ANGULAR CORRELATION; PHOTOIONIZATION; PROTOSTARS; Radio; Sciences of the Universe; SEMICONDUCTOR JUNCTIONS; STARS; SUPERCONDUCTING JUNCTIONS; SURFACES
• ISSN: 0004-637X; 1538-4357
• DOI: 10.1088/0004-637X/779/2/113

We present a multiwavelength study of the W40 star-forming region using infrared (IR) observations in the UKIRT JHK bands, Spitzer Infrared Array Camera bands, and Herschel PACS bands, 2.12 mu m H sub(2) narrowband imaging, and radio continuum observations from GMRT (610 and 1280 MHz), in a field of view (FoV) of ~34' x 40'. Archival Spitzer observations in conjunction with near-IR observations are used to identify 1162 Class II/III and 40 Class I sources in the FoV. The nearest-neighbor stellar surface density analysis shows that the majority of these young stellar objects (YSOs) constitute the embedded cluster centered on the high-mass source IRS 1A South. Radio continuum analysis shows that this region has a blister morphology, with the radio peak coinciding with a protostellar source.