The SOMA Radio Survey. I. Comprehensive SEDs of High-mass Protostars from Infrared to Radio and the Emergence of Ionization Feedback
Review article, 2019
We study centimeter continuum emission of eight high- and intermediate-mass protostars that are part of the SOFIA Massive Star Formation Survey, thus building extended spectral energy distributions (SEDs) from the radio to the infrared. We discuss the morphology seen in the centimeter continuum images, which are mostly derived from archival Very Large Array data, and the relation to infrared morphology. We use the SEDs to test new models of high-mass star formation including radiative and disk-wind feedback and associated free-free and dust continuum emission. We show that interferometric data of the centimeter continuum flux densities provide additional, stringent tests of the models by constraining the ionizing luminosity of the source; they also help to break degeneracies encountered when modeling the infrared-only SEDs, especially for the protostellar mass. Our derived parameters are consistent with physical parameters estimated by other methods, such as dynamical protostellar masses. We find a few examples of additional stellar sources in the vicinity of the high-mass protostars, which may be low-mass young stellar objects. However, the stellar multiplicity of the regions, at least as traced by radio continuum emission, appears to be relatively low.
ISM: jets and outflows
techniques: interferometric
stars: formation
Author
Viviana Rosero
University of Florida
University of Virginia
National Radio Astronomy Observatory Socorro
Kei E.I. Tanaka
Osaka University
National Astronomical Observatory of Japan
University of Florida
Jonathan Tan
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
University of Virginia
J. Marvil
National Radio Astronomy Observatory Socorro
Mengyao Liu
University of Virginia
University of Florida
Yichen Zhang
RIKEN
James M. De Buizer
National Aeronautics and Space Administration (NASA)
M. T. Beltrán
Arcetri Astrophysical Observatory
Published in
Astrophysical Journal
0004-637X (ISSN) 1538-4357 (eISSN)
Vol. 873 Issue 1 art. no 20Categorizing
Subject Categories (SSIF 2011)
Meteorology and Atmospheric Sciences
Astronomy, Astrophysics and Cosmology
Geophysics
Identifiers
DOI
10.3847/1538-4357/ab0209