Astron. J., 152, 146-146 (2016/November-0)
Star-forming activity in the HII regions associated with the IRAS 17160-3707 complex.
NANDAKUMAR G., VEENA V.S., VIG S., TEJ A., GHOSH S.K. and OJHA D.K.
Abstract (from CDS):
We present a multiwavelength investigation of star formation activity toward the southern H ii regions associated with IRAS 17160-3707, located at a distance of 6.2 kpc with a bolometric luminosity of 8.3 x 105 L☉. The ionized gas distribution and dust clumps in the parental molecular cloud are examined in detail using measurements at infrared, submillimeter and radio wavelengths. The radio continuum images at 1280 and 610 MHz obtained using the Giant Metrewave Radio Telescope reveal the presence of multiple compact sources as well as nebulous emission. At submillimeter wavelengths, we identify seven dust clumps and estimate their physical properties such as temperature: 24-30 K, mass: 300-4800 M☉ and luminosity: 9-317 x 102 L☉ using modified blackbody fits to the spectral energy distributions (SEDs) between 70 and 870 µm. We find 24 young stellar objects (YSOs) in the mid-infrared, with a few of them coincident with the compact radio sources. The SEDs of the YSOs have been fitted by the Robitaille models and the results indicate that those having radio compact sources as counterparts host massive objects in early evolutionary stages with best fit age <=0.2 Myr. We compare the relative evolutionary stages of clumps using various signposts such as masers, ionized gas, presence of YSOs and infrared nebulosity, and find six massive star-forming clumps and one quiescent clump. Of the former, five are in a relatively advanced stage and one in an earlier stage.
© 2016. The American Astronomical Society. All rights reserved.
H ii regions - infrared: ISM - ISM: individual objects: (IRAS 17160-3707, Bubble CS-112) - ISM: individual objects: IRAS 17160-3707, Bubble CS-112
Table 2: [NVV2016] SNN (Nos S1-S12). Table 5: [NVV2016] CN (Nos C1-C7). Table 6: [NVV2016] IRSNN (Nos IRS1-IRS24), [NVV2016] IRSLNN (Nos IRSL1-IRSL3).
Status at CDS:
Acronym for new objects described in the dictionary of nomenclature and being created in SIMBAD.
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