SIMBAD references

2018ApJ...863..126C - Astrophys. J., 863, 126-126 (2018/August-3)

A study of the c-C3HD/c-C3H2 ratio in low-mass star-forming regions.

CHANTZOS J., SPEZZANO S., CASELLI P., CHACON-TANARRO A., BIZZOCCHI L., SIPILA O. and GIULIANO B.M.

Abstract (from CDS):

We use the deuteration of c-C3H2 to probe the physical parameters of starless and protostellar cores, related to their evolutionary states, and compare it to the N2H+-deuteration in order to study possible differences between the deuteration of C- and N-bearing species. We observed the main species c-C3H2, the singly and doubly deuterated species c-C3HD and c-C3D2, as well as the isotopologue c-H13CC2H toward 10 starless cores and five protostars in the Taurus and Perseus complexes. We examined the correlation between the N(c-C3HD)/N(c-C3H2) ratio and the dust temperature along with the H2 column density and the CO depletion factor. The resulting N(c-C3HD)/N(c-C3H2) ratio is, within error bars, consistent with 10% in all starless cores with detected c-C3HD. This also accounts for the protostars except for the source HH211, where we measure a high deuteration level of 23%. The deuteration of N2H+ follows the same trend but is considerably higher in the dynamically evolved core L1544. We find no significant correlation between the deuteration of c-C3H2 and the CO depletion factor among the starless and protostellar cores. Toward the latter the coolest objects show the largest deuterium fraction in c-C3H2. We show that the deuteration of c-C3H2 can trace the early phases of star formation and is comparable to that of N2H+. However, the largest c-C3H2 deuteration level is found toward protostellar cores, suggesting that while c-C3H2 is mainly frozen onto dust grains in the central regions of starless cores, active deuteration is taking place on ice.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): astrochemistry - ISM: clouds - ISM: molecules - line: identification

Simbad objects: 25

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2018ApJ...863..126C and select 'bookmark this link' or equivalent in the popup menu


2019.11.14-00:48:55

© Université de Strasbourg/CNRS

    • Contact