The peculiar planetary nebula in M22

Journal Article · Wed Nov 01 04:00:00 EST 1989 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168061· OSTI ID:7242504

Cohen, J G; Gillett, F C ^[1]

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1. Palomar Observatory, Pasadena, CA (USA) NASA, Astrophysics Div., Washington, DC (USA)

The source discovered by the IRAS satellite near the center of the globular cluster M22, IRAS 18333-2357, has been studied using the IUE satellite and a ground-based optical telescope. The northern component of the close pair of stars is not a member of the cluster. The southern component is a hot star with T(eff) of about 50,000 K illuminating a small planetary nebula and is a member of M22. Both the planetary nebula and its central star are extremely hydrogen deficient. The luminosity of the central star is in good agreement with that expected on theoretical grounds and with the observed luminosity of the tip of the red giant branch. 27 refs.

• OSTI ID: 7242504
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 346; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHEMICAL COMPOSITION
DWARF STARS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY SPECTRA
GIANT STARS
HYDROGEN
INFRARED RADIATION
LUMINOSITY
NEBULAE
NONMETALS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PLANETARY NEBULAE
RADIATIONS
RED GIANT STARS
SPECTRA
STAR CLUSTERS
STARS
WHITE DWARF STARS