Universität zu Köln

Veena, V. S., Vig, S., Mookerjea, B., Sanchez-Monge, A., Tej, A. and Ishwara-Chandra, C. H. (2018). Probing the Massive Star-forming Environment: A Multiwavelength Investigation of the Filamentary IRDC G333.73+0.37. Astrophys. J., 852 (2). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-4357

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Abstract

We present a multiwavelength study of the filamentary infrared dark cloud (IRDC) G333.73+0.37. The region contains two distinct mid-infrared sources S1 and S2 connected by dark lanes of gas and dust. Cold dust emission from the IRDC is detected at seven wavelength bands, and we have identified 10 high-density clumps in the region. The physical properties of the clumps such as temperature (14.3-22.3 K) and mass (87-1530 M-circle dot) are determined by fitting a modified blackbody to the spectral energy distribution of each clump between 160 mu m and 1.2. mm. The total mass of the IRDC is estimated to be similar to 4700. Me-circle dot The molecular line emission toward S1 reveals signatures of protostellar activity. Low-frequency radio emission at 1300 and 610 MHz is detected toward S1 (shell-like) and S2 (compact morphology), confirming the presence of newly formed massive stars in the IRDC. Photometric analysis of near-and mid-infrared point sources unveils the young stellar object population associated with the cloud. Fragmentation analysis indicates that the filament is supercritical. We observe a velocity gradient along the filament, which is likely to be associated with accretion flows within the filament rather than rotation. Based on various age estimates obtained for objects in different evolutionary stages, we attempt to set a limit to the current age of this cloud.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Veena, V. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Vig, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mookerjea, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sanchez-Monge, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tej, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ishwara-Chandra, C. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-198986
DOI:	10.3847/1538-4357/aa9aef
Journal or Publication Title:	Astrophys. J.
Volume:	852
Number:	2
Date:	2018
Publisher:	IOP PUBLISHING LTD
Place of Publication:	BRISTOL
ISSN:	1538-4357
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language H-II REGIONS; YOUNG STELLAR OBJECTS; INFRARED-DARK CLOUDS; SPECTRAL ENERGY-DISTRIBUTIONS; EXACT ANALYTIC SOLUTIONS; ARRAY CAMERA IRAC; BOW SHOCK-MODELS; MOLECULAR CLOUDS; MILKY-WAY; HII-REGIONS Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/19898