Citation
F. Scappini et al., Detection of HCO+ towards cygnus OB2No. 12, M NOT R AST, 317(1), 2000, pp. L6-L10
Citations number
21
Categorie Soggetti
Space Sciences
Journal title
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN journal
00358711
→ ACNP
Volume
317
Issue
1
Year of publication
2000
Pages
L6 - L10
Database
ISI
SICI code
0035-8711(20000901)317:1<L6:DOHTCO>2.0.ZU;2-7
Abstract
HCO+ has been detected for the first time towards the star Cygnus OB2 No. 1
2 through emission of the 1-0 rotational transition at 89 GHz. The CO(J=2-1
) transition has also been observed. The observations are consistent with a
model of dense regions embedded in a low-density clump gas. If actually pr
esent, the dense component would have an aggregate size L less than or equa
l to 1300 au, in agreement with estimates of small-scale density fluctuatio
ns observed along diffuse lines of sight.