| dc.creator |
Cernicharo, José |
|
| dc.creator |
Goicoechea, Javier R. |
|
| dc.creator |
Benilan, Y. |
|
| dc.date |
2008-01-03T16:11:05Z |
|
| dc.date |
2008-01-03T16:11:05Z |
|
| dc.date |
2002-10-17 |
|
| dc.date.accessioned |
2017-01-31T00:59:39Z |
|
| dc.date.available |
2017-01-31T00:59:39Z |
|
| dc.identifier |
The Astrophysical Journal Letters, 580:L157–L160, 2002 December 1 |
|
| dc.identifier |
arXiv:astro-ph/0210383v1 |
|
| dc.identifier |
1538-4357 |
|
| dc.identifier |
http://hdl.handle.net/10261/2651 |
|
| dc.identifier |
10.1086/345588 |
|
| dc.identifier.uri |
http://dspace.mediu.edu.my:8181/xmlui/handle/10261/2651 |
|
| dc.description |
We report on the detection with the Infrared Space Observatory (ISO) of a molecular band at 57.5 microns (174 cm^{-1}) in carbon-rich evolved stars and in Sgr B2. Taking into account the chemistry of these objects the most likelihood carrier is a carbon chain. We tentatively assign the band to the nu_5 bending mode of C_4 for which a wavenumber of 170-172.4 cm^{-1} has been derived in matrix experiments (Withey et al. 1991). An alternate carrier might be C_4H, although the frequency of its lowest energy vibrational bending mode, nu_7, is poorly known (130-226 cm^{-1}). If the carrier is C_4, the derived maximum abundance is nearly similar to that found for C_3 in the interstellar and circumstellar media by Cernicharo, Goicoechea & Caux (2000). Hence, tetra-atomic carbon could be one of the most abundant carbon chain molecules in these media. |
|
| dc.description |
Peer reviewed |
|
| dc.format |
289683 bytes |
|
| dc.format |
application/pdf |
|
| dc.language |
eng |
|
| dc.publisher |
American Astronomical Society |
|
| dc.relation |
Preprint |
|
| dc.rights |
openAccess |
|
| dc.subject |
Infrared: general |
|
| dc.subject |
ISM: individual (Sagittarius B2) |
|
| dc.subject |
ISM: lines and bands |
|
| dc.subject |
ISM: molecules |
|
| dc.subject |
Line: identification |
|
| dc.subject |
Stars: individual (CRL 618, CRL 2688, IRC +10216, NGC 7027) |
|
| dc.title |
A new infrared band in the Interstellar and Circumstellar Clouds: C_4 or C_4H? |
|
| dc.type |
Pre-print |
|