| Issue |
A&A
Volume 368, Number 2, March III 2001
|
|
|---|---|---|
| Page(s) | 712 - 715 | |
| Section | Astronomical instrumentation | |
| DOI | https://doi.org/10.1051/0004-6361:20000544 | |
| Published online | 15 March 2001 | |
Laboratory and astrophysical detection of the hyperfine structure
of the 
= 1-0 rotational transition of HC
O+
1
Dipartimento di Chimica "G. Ciamician", Università di Bologna, via Selmi 2, 40126 Bologna, Italy
2
Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
Corresponding author: L. Dore, dore@ciam.unibo.it
Received:
13
June
2000
Accepted:
7
December
2000
The three hyperfine components of the 
rotational transition of 
have been resolved
in laboratory leading to a value of the quadrupole coupling
constant eQq of 4.595 MHz, which is far below the previous
estimate of an upper limit of 12 MHz by Guélin et
al. [CITE]. The (1-0) spectrum has been
observed toward the "molecular peak"of L1544 and analyzed on
the basis of the laboratory hyperfine frequencies.
Key words: molecular data / methods: laboratory / ISM: individual(L1544), molecules / radio lines: ISM
© ESO, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.