Neutral carbon in the EGG Nebula (AFGL 2688) | Zendy

C. A. Beichman | Zendy; J. Keene | Zendy; T. G. Phillips | Zendy; P. J. Huggins | Zendy; A. Wootten | Zendy; C. R. Masson | Zendy; M. A. Frerking | Zendy

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Neutral carbon in the EGG Nebula (AFGL 2688)

Author(s) -

C. A. Beichman,

J. Keene,

T. G. Phillips,

P. J. Huggins,

A. Wootten,

C. R. Masson,

M. A. Frerking

Publication year - 1983

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/161397

Subject(s) - physics , astrophysics , nebula , stars , planetary nebula , interstellar medium , carbon star , asymptotic giant branch , astronomy , stellar evolution , emission nebula , orion nebula , galaxy

Observations have been made in the 492 GHz line of atomic carbon (C I) toward eight evolved stars with circumstellr envelopes. The observations of one star, AFGL 2688, also known as the Egg Nebula, yield the detection of a line (T(/sub A/approx.0.9 K) with a central velocity and width that are the same, within the uncertainties, as those measured in CO. The large C I/CO abundance ratio implied by the data for AFGL 2688 suggests that (C)/(O)>4 in this object. Upper limits to the C I/CO ratio are reported for seven other stars, including IRC+10216 and NGC 7027.

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