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Rosero, V. ; Hofner, P. ; Kurtz, S. ; Cesaroni, R. ; Carrasco-GonzáLez, C. ; Araya, E. D. ; Rodríguez, L. F. ; Menten, K. M. ; Wyrowski, F. ; Loinard, L. ; et al ( , The Astrophysical journal)In this study we analyze 70 radio continuum sources associated with dust clumps and considered to be candidates for the earliest stages of high-mass star formation. The detection of these sources was reported by Rosero et al. (2016), 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 ionized jets associated with high-mass protostars, but for the most compact sources we cannot discard the scenario that they represent pressure-confined HII regions. This result is highly relevant for recent theoretical models based on core accretion that 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.more » « less
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Girart, J. M. ; Fernández-López, M. ; Li, Z.-Y. ; Yang, H. ; Estalella, R. ; Anglada, G. ; Áñez-López, N. ; Busquet, G. ; Carrasco-González, C. ; Curiel, S. ; et al ( , The Astrophysical Journal)