The SOMA Radio Survey. I. Comprehensive SEDs of High-mass Protostars from Infrared to Radio and the Emergence of Ionization Feedback

Rosero, VivianaUniversity of Florida,National Radio Astronomy Observatory Socorro,University of Virginia (author)

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.

Tanaka, Kei E.I.Osaka University,National Astronomical Observatory of Japan,University of Florida (author)
Tan, Jonathan,1973Chalmers tekniska högskola,Chalmers University of Technology,University of Virginia(Swepub:cth)tanj (author)
Marvil, J.National Radio Astronomy Observatory Socorro (author)
Liu, MengyaoUniversity of Florida,University of Virginia (author)
Zhang, YichenRIKEN (author)
De Buizer, James M.NASA Ames Research Center (author)
Beltrán, M. T.Osservatorio Astrofisico di Arcetri,Arcetri Astrophysical Observatory (author)
University of FloridaNational Radio Astronomy Observatory Socorro (creator_code:org_t)

By the author/editor: Rosero, Viviana; Tanaka, Kei E.I.; Tan, Jonathan, 1 ...; Marvil, J.; Liu, Mengyao; Zhang, Yichen; show more...; De Buizer, James ...; Beltrán, M. T.; show less...

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NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Meteorology and ...

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Astronomy Astrop ...

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Geophysics

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