The dwarf spheroidal galaxy Andromeda I

Journal Article · Tue May 01 00:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168706· OSTI ID:7059879

Mould, J; Kristian, J ^[1]

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1. Palomar Observatory, Pasadena, CA (USA) Mount Wilson and Las Campanas Observatories, Pasadena, CA (USA)

Images of Andromeda I in the visual and near-infrared show a giant branch characteristic of galactic globular clusters of intermediate metallicity. The distance of the galaxy is estimated from the tip of the giant branch to be 790 + or - 60 kpc. The physical dimensions and luminosity are similar to those of the dwarf spheroidal in Sculptor. There is no evidence for an intermediate age population in Andromeda I, and appropriate upper limits are specified. There is marginal evidence for a color gradient in the galaxy, a phenomenon not previously noted in a dwarf spheroidal. 21 refs.

• OSTI ID: 7059879
• Journal Information: Astrophysical Journal; (USA), Vol. 354; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
GALAXIES
NEAR INFRARED RADIATION
VISIBLE RADIATION
DISTANCE
GALACTIC EVOLUTION
IMAGES
LUMINOSITY
MORPHOLOGY
SIZE
STAR CLUSTERS
ELECTROMAGNETIC RADIATION
INFRARED RADIATION
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
640105* - Astrophysics & Cosmology- Galaxies