SIMBAD references

2006ApJ...649L..17T - Astrophys. J., 649, L17-L20 (2006/September-3)

Detection of C3O in IRC +10216: oxygen-carbon chain chemistry in the outer envelope.

TENENBAUM E.D., APPONI A.J., ZIURYS L.M., AGUNDEZ M., CERNICHARO J., PARDO J.R. and GUELIN M.

Abstract (from CDS):

The oxygen-bearing species C3O has been identified in the circumstellar envelope of the carbon star IRC +10216. The J=8⟶7, 9⟶8, 10⟶9, 14⟶13, and 15⟶14 transitions were detected at 2 and 3 mm using the Arizona Radio Observatory's 12 m telescope. Measurements of the J=9⟶8, 10⟶9, and 12⟶11 lines were simultaneously conducted at the IRAM 30 m telescope. The line profiles of C3O are roughly U-shaped, indicating an extended shell distribution for this molecule in IRC +10216. The total column density derived for C3O is 1.2x1012/cm2, at least an order of magnitude higher than that predicted by current chemical models. However, a revised model that includes reactions of atomic oxygen with carbon-chain radicals, such as l-C3H and C4, can reproduce the observed abundance. This model also predicts that C3O arises from a shell source with an outer radius near r∼30'', consistent with the observations. These results suggest that gas phase neutral-neutral chemistry may be producing the oxygen-bearing molecules present in the outer envelope of IRC +10216.

Abstract Copyright:

Journal keyword(s): Astrochemistry - Stars: Circumstellar Matter - ISM: Molecules - Radio Lines: Stars - Stars: Carbon - Stars: Individual: Alphanumeric: IRC +10216

Simbad objects: 6

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2006ApJ...649L..17T and select 'bookmark this link' or equivalent in the popup menu


2020.01.26-22:59:12

© Université de Strasbourg/CNRS

    • Contact