IRAS observations of the globular cluster 47 Tucanae

Journal Article · Fri Jul 01 04:00:00 EDT 1988 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/114794· OSTI ID:7068258

Gillett, F G; De Jong, T; Neugebauer, G; Rice, W L; Emerson, J P

Integrated and individual-star observations of 47 Tuc obtained at 12, 25, 60, and 100 microns by IRAS are reported. The data are presented in tables and brightness contour maps and analyzed. Features discussed include integrated light dominated by stellar photospheric emission, 12- and 25-micron excesses (associated with red giants in the outer region of the cluster), and a small excess at 100 microns (attributed to integrated-light heating of about 0.0003 solar mass of silicate dust within 6 arcmin of the cluster center). It is pointed out that this is much less dust than predicted by theoretical models of accumulation since the cluster passed through the Galactic plane about 30 Myr ago, and possible dust-removal mechanisms are considered. 55 references.

• Research Organization: Kitt Peak National Observatory, Tucson, AZ (USA); Amsterdam Universiteit (Netherlands); California Institute of Technology, Pasadena (USA); Queen Mary College, London (England)
• OSTI ID: 7068258
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 96; ISSN ANJOA
• 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
COSMIC DUST
DUSTS
ELECTROMAGNETIC RADIATION
GIANT STARS
INFRARED RADIATION
MAPS
MASS
MASS TRANSFER
RADIATIONS
RED GIANT STARS
STAR CLUSTERS
STARS
STELLAR ACTIVITY
STELLAR WINDS
VARIABLE STARS