2005A&A...433.1145C


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.17CET20:24:32

2005A&A...433.1145C - Astronomy and Astrophysics, volume 433, 1145-1152 (2005/4-3)

Laboratory and space spectroscopy of DCO+.

CASELLI P. and DORE L.

Abstract (from CDS):

The rotational spectra of DCO+and its two isotopomers D13CO+and DC18O+, produced in a negative glow discharge cell, have been recorded in the 137-792GHz region, which includes lines from J=2←1 up to J=11←10. The determined rotational and centrifugal distortion constants allow to predict the DCO+rotational spectrum up to 1000GHz with an accuracy of 1 part in 108 or better. This is important for kinematic studies of dense molecular cloud cores and for future far-infrared observations. We also report on the first detection of the hyperfine structure of the DCO+(1-0) line made at the IRAM 30m antenna, toward the quiescent starless cloud core L1512, in the Taurus Molecular Cloud. We point out that this is the first observation of the hyperfine splitting due to the deuteron. This allowed us to quantify the effects of the hyperfine splitting on the line width determination; if the hyperfine structure is not taken into account in the line fit, the DCO+(1-0) line width is overestimated by a significant factor (>2).

Abstract Copyright:

Journal keyword(s): molecular data - methods: laboratory - ISM: individual objects: L1512 - ISM: molecules - radio lines: ISM

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Taurus Dark Cloud SFR 04 41.0 +25 52           ~ 3372 0
2 LDN 1512 MoC 05 04 09.7 +32 43 09           ~ 159 0

    Equat.    Gal    SGal    Ecl

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2020.02.17-20:24:32

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