2002A&A...389L...6B


Query : 2002A&A...389L...6B

2002A&A...389L...6B - Astronomy and Astrophysics, volume 389, L6-10 (2002/7-1)

The degree of CO depletion in pre-stellar cores.

BACMANN A., LEFLOCH B., CECCARELLI C., CASTETS A., STEINACKER J. and LOINARD L.

Abstract (from CDS):

We present new results on CO depletion in a sample of nearby pre-stellar cores, based on observations of the millimeter C17O and C18O lines and the 1.3mm dust emission with the IRAM 30m telescope. In most cases, the distribution of CO is much flatter than that of the dust, whereas other tracers, like N2H+, still probe the latter. In the centre of these objects, we estimate CO to be underabundant by a factor 4-15 depending on the cores. The CO underabundance is more pronounced in the central regions and appears to decrease with increasing distance from the core centre. This underabundance is most likely due to the freezing out of CO onto the dust grains in the cold, dense parts of the cores. We find evidence for an increase of the CO depletion degree with the core density.

Abstract Copyright:

Journal keyword(s): ISM: molecules - dust, extinction - stars: formation

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 LDN 1544 DNe 05 04 16.6 +25 10 48           ~ 735 0
2 NAME [BM89] L1544 cor 05 04 22.5 +25 11 36           ~ 435 1
3 NAME Ophiuchus D MoC 16 28 29.2 -24 18 25           ~ 107 0
4 LDN 1709A DNe 16 30 50.7 -23 41 03           ~ 24 0
5 LDN 1689B DNe 16 34 42.1 -24 36 11           ~ 147 0
6 LDN 310 DNe 18 07 12 -18 21.6           ~ 10 0
7 LDN 429 DNe 18 16 44 -08 18.9           ~ 34 0
8 LDN 328 DNe 18 17 00 -18 01.9           ~ 46 0

    Equat.    Gal    SGal    Ecl

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2021.07.29-22:38:23

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