Radio properties of young stellar objects in the core of the Serpens South Infrared Dark Cloud

Journal Article · Mon Feb 01 04:00:00 EST 2016 · The Astronomical Journal (Online)

DOI:https://doi.org/10.3847/0004-6256/151/2/42· OSTI ID:22890163

Kern, Nicholas S. ^[1]; Keown, Jared A. ^[2]; Tobin, John J. ^[3]; Mead, Adrian ^[4]

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1. Department of Astronomy, University of California, Berkeley, CA (United States)
2. Department of Physics and Astronomy, University of Victoria, Victoria, BC (Canada)
3. Leiden Observatory, Leiden University, Leiden (Netherlands)
4. Department of Astronomy, University of Virginia, Charlottesville, VA (United States)

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. Observations were conducted in two bands centered at 7.25 GHz (4.14 cm) and 4.75 GHz (6.31 cm) with a σ{sub rms} of 8.5 and 11.1 μJy/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′ × 5′ 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 young stellar object (YSO) radio luminosity versus bolometric luminosity correlation. Lastly, we marginally detect an additional six radio sources at the 2–3σ 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.

• OSTI ID: 22890163
• Journal Information: The Astronomical Journal (Online), Journal Name: The Astronomical Journal (Online) Journal Issue: 2 Vol. 151; ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BOLOMETERS
CLASSIFICATION
COSMIC DUST
GHZ RANGE 01-100
LUMINOSITY
PROTOSTARS
SENSITIVITY ANALYSIS
STAR EVOLUTION
STARS