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http://hdl.handle.net/20.500.12386/28833
Titolo: | Weak and Compact Radio Emission in Early High-mass Star-forming Regions. II. The Nature of the Radio Sources | Autori: | Rosero, V. Hofner, P. Kurtz, S. CESARONI, Riccardo Carrasco-González, C. Araya, E. D. Rodríguez, L. F. Menten, K. M. Wyrowski, F. Loinard, L. Ellingsen, S. P. MOLINARI, Sergio |
Data pubblicazione: | 2019 | Rivista: | THE ASTROPHYSICAL JOURNAL | Numero: | 880 | Fascicolo: | 2 | Da pagina:: | 99 | 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 (< 1 mJy) 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. | URI: | http://hdl.handle.net/20.500.12386/28833 | URL: | https://iopscience.iop.org/article/10.3847/1538-4357/ab2595 | ISSN: | 0004-637X | DOI: | 10.3847/1538-4357/ab2595 | Bibcode ADS: | 2019ApJ...880...99R | Fulltext: | open |
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