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Title:
The EGG nebula - A protostellar disc remnant around an evolved star?
Authors:
Pringle, J. E.
Affiliation:
AA(Cambridge, University, England)
Publication:
Royal Astronomical Society, Monthly Notices (ISSN 0035-8711), vol. 238, May 15, 1989, p. 37p-40p. (MNRAS Homepage)
Publication Date:
05/1989
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ACCRETION DISKS, PLANETARY NEBULAE, PROTOSTARS, STAR FORMATION, STELLAR ENVELOPES, ANGULAR MOMENTUM, EMISSION SPECTRA, HYDROCYANIC ACID, LINE SPECTRA, STELLAR MASS EJECTION
Bibliographic Code:
1989MNRAS.238P..37P

Abstract

HCN observations of CRL 2688 (the 'Egg Nebula') indicate that the dense circumstellar envelope contains a large amount of angular momentum. It is proposed that the source of this angular momentum is a large and massive circumstellar disk left over from the period of star formation. It is suggested that the presence of such disks could be quite common, and attention is drawn to other observational areas which offer support for the longevity of such disks.

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