Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725102m&link_type=abstract
American Astronomical Society, AAS Meeting #217, #251.02; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
Photodissociation regions (PDRs) are predominately neutral volumes at the molecular cloud/HII region interface of star forming complexes. Far-ultraviolet photons with energies below 13.6 eV can escape HII regions and dissociate atoms with a lower ionization potential, such as carbon, within PDRs. This has been verified, for example, by detection of carbon radio recombination line (CRL) emission from PDRs. Roshi (2007) suggested that the non-thermal component of CRL line width is dominated by magnetic turbulence. He combined data from observations of several CRLs separated in frequency and radiative transfer models of the CRL emission regions to derive the magnetic field strength. Here, we discuss PDR models toward four HII regions using observations from the Green Bank Telescope (GBT) and compare the derived magnetic field strength with published Zeeman observations to test this hypothesis.
Anish Roshi D.
Balser Dana S.
Bania Thomas M.
Montet Benjamin
Rood Robert T.
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