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134659 - Weak and compact radio emission in early high-mass star-forming regions. II. The nature of the radio sources.pdf (2.61 MB)

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

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posted on 2023-05-20, 06:40 authored by Rosero, V, Hofner, P, Kurtz, S, Cesaroni, R, Carrasco-Gonzalez, C, Araya, ED, Rodriguez, LF, Menten, KM, Wyrowski, F, Loinard, L, Simon EllingsenSimon Ellingsen, Molinari, S
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.


Publication title

Astrophysical Journal



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School of Natural Sciences


Univ Chicago Press

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1427 E 60Th St, Chicago, USA, Il, 60637-2954

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Copyright 2019 The American Astronomical Society

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  • Open

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Expanding knowledge in the physical sciences

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