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The rotating molecular core and precessing outflow of the young stellar object Barnard 1c
B. C. Matthews, M. R. Hogerheijde, J. K. Jorgensen +1
We investigate the structure of the core surrounding the recently identified deeply embedded young stellar object Barnard 1c which has an unusual polarization pattern as traced in…
Gas-phase CO2 emission toward Cepheus A East: the result of shock activity?
P. Sonnentrucker, E. González-Alfonso, D. A. Neufeld +5
We report the first detection of gas-phase CO2 emission in the star-forming region Cepheus A East, obtained by spectral line mapping of the v2 bending mode at 14.98 micron with the…
Spitzer observations of hydrogen deuteride
David A. Neufeld, Joel D. Green, David J. Hollenbach +7
We report the detection of interstellar hydrogen deuteride (HD) toward the supernova remnant IC443, and the tentative detection of HD toward the Herbig Haro objects HH54 and HH7 an…
Molecular Line Observations of Infrared Dark Clouds: Seeking the Precursors to Intermediate and Massive Star Formation
Sarah E. Ragan, Edwin A. Bergin, Rene Plume +4
We have identified 41 infrared dark clouds from the 8 micron maps of the Midcourse Space Experiment (MSX), selected to be found within one square degree areas centered on known ult…
Spitzer observations of HH54 and HH7-11: mapping the H2 ortho-to-para ratio in shocked molecular gas
David A. Neufeld, Gary J. Melnick, Paule Sonnentrucker +6
We report the results of spectroscopic mapping observations carried out toward the Herbig-Haro objects HH7-11 and HH54 over the 5.2 - 37 micron region using the Infrared Spectrogra…
The Thermal Structure of Gas in Pre-Stellar Cores: A Case Study of Barnard 68
E. A. Bergin, S. Maret, F. F. S. van der Tak +3
We present a direct comparison of a chemical/physical model to multitransitional observations of C18O and 13CO towards the Barnard 68 pre-stellar core. These observations provide a…