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5 papers · 2 filters
First detection of water vapor in a pre-stellar core
Paola Caselli, Eric Keto, Edwin A. Bergin +11
Water is a crucial molecule in molecular astrophysics as it controls much of the gas/grain chemistry, including the formation and evolution of more complex organic molecules in ice…
Broadband analysis techniques for Herschel/HIFI spectral surveys of chemically rich star-forming regions
Justin L. Neill, Edwin A. Bergin, Dariusz C. Lis +3
The Heterodyne Instrument for the Far Infrared (HIFI) aboard the Herschel Space Observatory has acquired high-resolution broadband molecular spectra of star-forming regions in a wa…
Multi-line detection of O2 toward rho Oph A
R. Liseau, P. F. Goldsmith, B. Larsson +36
Models of pure gas-phase chemistry in well-shielded regions of molecular clouds predict relatively high levels of molecular oxygen, O2, and water, H2O. Contrary to expectation, the…
Complex Structure in Class 0 Protostellar Envelopes III: Velocity Gradients in Non-Axisymmetric Envelopes, Infall or Rotation?
John J. Tobin, Lee Hartmann, Edwin A. Bergin +5
We present an interferometric kinematic study of morphologically complex protostellar envelopes based on observations of the dense gas tracers N2H+ and NH3. The strong asymmetric n…
Very Large Array Observations of Ammonia in Infrared-Dark Clouds II: Internal Kinematics
Sarah E. Ragan, Fabian Heitsch, Edwin A. Bergin +1
Infrared-dark clouds (IRDCs) are believed to be the birthplaces of rich clusters and thus contain the earliest phases of high-mass star formation. We use the Green Bank Telescope (…