HST detection of spiral structure in two Coma Cluster dwarf galaxies

We report the discovery of (stellar) spiral-like structure in Hubble Space Telescope images of two dwarf galaxies (GMP 3292 and GMP 3629) belonging to the Coma cluster. GMP 3629 is the faintest such galaxy detected in a cluster environment, and it is the first such galaxy observed in the dense Coma...

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Bibliographic Details
Published in:arXiv.org 2003-08
Main Authors: Graham, Alister W, Jerjen, Helmut, Guzman, Rafael
Format: Article
Language:English
Subjects:
Dwarf galaxies
Elliptical galaxies
Galactic clusters
Galactic evolution
Hubble Space Telescope
Space telescopes
Spiral galaxies
Stars & galaxies
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Summary:We report the discovery of (stellar) spiral-like structure in Hubble Space Telescope images of two dwarf galaxies (GMP 3292 and GMP 3629) belonging to the Coma cluster. GMP 3629 is the faintest such galaxy detected in a cluster environment, and it is the first such galaxy observed in the dense Coma cluster. The large bulge and the faintness of the broad spiral-like pattern in GMP 3629 suggests that its disk may have been largely depleted. >We may therefore have found an example of the ``missing link'' in theories of galaxy evolution which have predicted that dwarf spiral galaxies, particularly in clusters, evolve into dwarf elliptical galaxies.
ISSN:2331-8422
DOI:10.48550/arxiv.0308241