Radio Properties of Young Stellar Objects in the Core of the Serpens South Infrared Dark Cloud

Abstract

We present deep radio continuum observations of the star-forming core of the Serpens South Infrared Dark Cloud with the Karl G. Jansky Very Large Array (VLA). Observations were conducted in two bands centered at 7.25 GHz (4.14 cm) and 4.75 GHz (6.31 cm) with an rms of 8.5 and 11.1 microJy/beam, respectively. We also use 2MASS, Spitzer and Herschel data to put our radio observations in the context of young stellar populations characterized by near and far infrared observations. Within a 5 arcmin x 5 arcmin region of interest around the central cluster, we detect roughly eighteen radio sources, seven of which we determine are protostellar in nature due to their radio spectral indices and their association with infrared sources. We find evidence for a previously undetected embedded Class 0 protostar and reaffirm Class 0 protostellar classifications determined by previous millimeter wavelength continuum studies. We use our infrared data to derive mid-infrared luminosities for three of our protostellar sources and find relative agreement between the known YSO radio luminosity vs bolometric luminosity correlation. Lastly, we marginally detect an additional six radio sources at the 2-3 sigma level that lie within two arcseconds of infrared YSO candidates, providing motivation for higher sensitivity studies to clarify the nature of these sources and further probe embedded and/or low luminosity YSOs in Serpens South.

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Cited by in corpus (11)

• The Gould's Belt Distances Survey (GOBELINS) III. The distance to the Serpens/Aquila Molecular Complex
• Low dust emissivities and radial variations in the envelopes of Class 0 protostars: a signature of early grain growth?
• Distribution of Serpens South protostars revealed with ALMA
• How do stars gain their mass? A JCMT/SCUBA-2 Transient Survey of Protostars in Nearby Star Forming Regions
• The fragmentation and stability of hierarchical structure in Serpens South
• Chandra Detection of An Evolved Population of Young Stars in Serpens South
• Young Stellar Populations in MYStIX Star Forming Regions: Candidate Protostars
• Discovery of 22 GHz Water Masers in the Serpens South Region
• The JCMT Gould Belt Survey Complete Core Catalogue: Core mass function variations between nearby molecular clouds
• The JCMT Transient Survey: Four Year Summary of Monitoring the Submillimeter Variability of Protostars
• High-resolution radio observations of massive protostars in the SARAO MeerKAT Galactic Plane Survey