SIMBAD references

2001ApJ...552L.163L - Astrophys. J., 552, L163-L166 (2001/May-2)

Doubly deuterated molecular species in protostellar environments.

LOINARD L., CASTETS A., CECCARELLI C., CAUX E. and TIELENS A.G.G.M.

Abstract (from CDS):

We report the detection of the doubly deuterated forms of ammonia (ND2H) and formaldehyde (D2CO) toward 16293E, a newly identified low-luminosity protostar in the ρ Ophiucus molecular complex. The abundances of ND2H and D2CO compared with their hydrogenated counterparts NH3 and H2CO are ∼3% and 40%±20%, respectively. To date, 16293E is thus the source with the highest levels of multiple deuteration: [ND2H]/[NH3] is 5-6 times larger there than in the only other astronomical source where ND2H has ever been found, the dense ammonia core of L134N; and [D2CO]/[H2CO] is more than 5 times higher than in the proto-binary system IRAS 16293-2422. The relative abundances of doubly deuterated molecules in low-luminosity protostars are much higher than their current gas-phase [D]/[H] ratios would suggest and, therefore, likely reflect active grain surface chemistry followed by some desorption process.

Abstract Copyright:

Journal keyword(s): ISM: Abundances - ISM: Individual: Alphanumeric: IRAS 16293E - ISM: Molecules - Stars: Formation

Simbad objects: 5

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2001ApJ...552L.163L and select 'bookmark this link' or equivalent in the popup menu


2019.12.12-22:04:44

© Université de Strasbourg/CNRS

    • Contact