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Paper: Physics and Chemistry of Strongly Irradiated Protostars in Corona Australis
Volume: 476, New Trends in Radio Astronomy in the ALMA Era
Page: 317
Authors: Lindberg, J. E.; Jørgensen, J. K.; Bisschop, S.; Sakai, N.; Watanabe, Y.; Yamamoto, S.; DIGIT team, ALMA Cycle 0 Protostars team
Abstract: We have conducted interferometric spectral-line observations with the SMA and APEX of the R CrA region, a star-forming region with a handful of low-mass young stellar objects. We have also conducted single-dish observations of the same spectral lines in 17 young stellar objects in the CrA star-forming region, conducted APEX and ASTE unbiased line surveys of IRS7B, a Class 0/I source in the region, and performed far-infrared continuum mapping with the Herschel Space Observatory. We find unexpectedly high H2CO excitation temperatures in the R CrA region, but also in other protostars in the CrA (Corona Australis) star-forming region. Our models show that the Herbig Be star R CrA is the dominant heat source in this region. Thus, also intermediate-mass stars have large effects on the physical properties in such regions. ALMA observations of H2CO can be used to trace such heating also in more distant regions.
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