Laboratory and astrophysical detection of the hyperfine structure of the J=1-0 rotational transition of (HCO+)-O-17

Authors
Dore, L Cazzoli, G Caselli, P
Citation
L. Dore et al., Laboratory and astrophysical detection of the hyperfine structure of the J=1-0 rotational transition of (HCO+)-O-17, ASTRON ASTR, 368(2), 2001, pp. 712-715
Citations number
30
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY AND ASTROPHYSICS
ISSN journal
00046361 → ACNP
Volume
368
Issue
2
Year of publication
2001
Pages
712 - 715
Database
ISI
SICI code
0004-6361(200103)368:2<712:LAADOT>2.0.ZU;2-Y
Abstract
The three hyperfine components of the J = 1 <-- 0 rotational transition of (HCO+)-O-17 have been resolved in laboratory leading to a value of the quad rupole coupling constant eQq of 4.595 MHz? which is far below the previous estimate of an upper limit of 12 MHz by Guelin et al. (1982a). The (HCO+)-O -17 (1-0) spectrum has been observed toward the "molecular peak" of L1544 a nd analyzed on the basis of the laboratory hyperfine frequencies.