257 citations · 7.1k across the 128 of their papers we have counts for
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Chemical modeling of L183 (= L134N) : an estimate of the ortho/para H2 ratio
Laurent Pagani, Charlotte Vastel, Edouard Hugo +7
Context. The high degree of deuteration observed in some prestellar cores depends on the ortho-to-para H2 ratio through the H3+ fractionation. Aims. We want to constrain the ortho/…
Survey of ortho-H2D+(1_{1,0}-1_{1,1}) in dense cloud cores
Paola Caselli, Charlotte Vastel, Cecilia Ceccarelli +3
We present a survey of the ortho-H2D+(1_{1,0}-1_{1,1}) line toward a sample of 10 starless cores and 6 protostellar cores, carried out at the Caltech Submillimeter Observatory. The…
Simultaneous Determination of the Cosmic Ray Ionization Rate and Fractional Ionization in DR21(OH)
T. Hezareh, M. Houde, C. McCoey +2
We present a new method for the simultaneous calculation of the cosmic ray ionization rate, zeta(H2), and the ionization fraction, chi(e), in dense molecular clouds. A simple netwo…
Depletion and low gas temperature in the L183 prestellar core : the N2H+ - N2D+ tool
Laurent Pagani, Aurore Bacmann, Sylvie Cabrit +1
Context. The study of pre-stellar cores (PSCs) suffers from a lack of undepleted species to trace the gas physical properties in their very dense inner parts. Aims. We want to carr…
Deuterium enhancement in H3+ in prestellar cores
Charlotte Vastel, T. G. Phillips, P. Caselli +2
Deuterium enhancement of monodeuterated species has been recognized for more than 30 years as a result of the chemical fractionation that results from the difference in zero point…
The Distribution of Ortho-H_2D+(1_1,0 - 1_1,1) in L1544: Tracing the Deuteration Factory in Prestellar Cores
C. Vastel, P. Caselli, C. Ceccarelli +5
Prestellar cores are unique laboratories for studies of the chemical and physical conditions preceding star formation. We observed the prestellar core L1544 in the fundamental tran…