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Weak and compact radio emission in early high-mass star-forming regions. II. The nature of the radio sources

Citation

Rosero, V and Hofner, P and Kurtz, S and Cesaroni, R and Carrasco-Gonzalez, C and Araya, ED and Rodriguez, LF and Menten, KM and Wyrowski, F and Loinard, L and Ellingsen, SP and Molinari, S, Weak and compact radio emission in early high-mass star-forming regions. II. The nature of the radio sources, Astrophysical Journal, 880, (2) Article 99. ISSN 0004-637X (2019) [Refereed Article]


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Copyright Statement

Copyright 2019 The American Astronomical Society

DOI: doi:10.3847/1538-4357/ab2595

Abstract

In this study we analyze 70 radio continuum sources that are associated with dust clumps and which are considered to be candidates for the earliest stages of high-mass star formation. The detection of these sources was reported by Rosero et al., who found most of them to show weak (< 1mJy) and compact (< 0".6) radio emission. Herein, we used the observed parameters of these sources to investigate the origin of the radio continuum emission. We found that at least ∼30% of these radio detections are most likely to be ionized jets associated with high-mass protostars. However, for the most compact sources, we cannot discard the scenario that they represent pressure-confined H II regions. This result is highly relevant for recent theoretical models that are based on core accretion, which predict the first stages of ionization from high-mass stars to be in the form of jets. Additionally, we found that properties such as the radio luminosity as a function of the bolometric luminosity of ionized jets from low and high-mass stars are extremely well-correlated. Our data improve upon previous studies by providing further evidence of a common origin for jets independently of luminosity.

Item Details

Item Type:Refereed Article
Keywords:ISM: jets and outflows; stars: formation; HII regions; techniques: interferometric
Research Division:Physical Sciences
Research Group:Astronomical and Space Sciences
Research Field:Galactic Astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Physical Sciences
UTAS Author:Ellingsen, SP (Professor Simon Ellingsen)
ID Code:134659
Year Published:2019
Deposited By:Mathematics and Physics
Deposited On:2019-08-26
Last Modified:2019-09-10
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