2008A&A...485L..33A


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST23:00:39

2008A&A...485L..33A - Astronomy and Astrophysics, volume 485, L33-36 (2008/7-3)

Tentative detection of phosphine in IRC +10216.

AGUNDEZ M., CERNICHARO J., PARDO J.R., GUELIN M. and PHILLIPS T.G.

Abstract (from CDS):

The JK=10-00 rotational transition of phosphine (PH3) at 267GHz has been tentatively identified with a TMB∼40mK spectral line observed with the IRAM 30-m telescope in the C-star envelope IRC +10216. A radiative transfer model was used to fit the observed line profile. The derived PH3 abundance relative to H2 is 6x10–9, although it may have a large uncertainty due to the lack of knowledge about the spatial distribution of this species. If our identification is correct, it implies that PH3 has a similar abundance to what is reported for HCP in this source and that these two molecules (HCP and PH3) together take up about 5% of phosphorus in IRC +10216. The abundance of PH3, like that of other hydrides in this source, is not well explained by conventional gas-phase LTE and non-LTE chemical models, and may imply formation on grain surfaces.

Abstract Copyright:

Journal keyword(s): stars: individual: IRC +10216 - stars: carbon - radio lines: stars - astrochemistry - line: identification - stars: AGB and post-AGB

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 IRC +10216 C* 09 47 57.40632 +13 16 43.5648     10.96     C9,5e 2134 0
2 V* V1610 Cyg pA* 21 02 18.27 +36 41 37.0           F5Iae 830 1

    Equat.    Gal    SGal    Ecl

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2020.07.13-23:00:39

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