Neutral carbon in the EGG nebula (AFGL 2688)

Journal Article · Sat Oct 15 00:00:00 EDT 1983 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/161397· OSTI ID:6741975

Beichman, C A; Keene, J; Phillips, T G; Huggins, P J; Wootten, H A; Masson, C; Frerking, M A

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.

• Research Organization: Jet Propulsion Laboratory, California Institute of Technology
• OSTI ID: 6741975
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 273:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ATMOSPHERES
CARBON
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBON STARS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMISTRY
COSMOCHEMISTRY
ELEMENTS
EMISSION
INFRARED SPECTRA
INTERSTELLAR GRAINS
MAIN SEQUENCE STARS
MATHEMATICAL MODELS
NEBULAE
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
SPECTRA
STAR MODELS
STARS
STELLAR ATMOSPHERES