HST detection of spiral structure in two Coma Cluster dwarf galaxies

Details HST detection of spiral structure in two Coma Cluster dwarf galaxies HST detection of spiral structure in two Coma Cluster dwarf galaxies

2003-08-14

arxiv.org/abs/astro-ph/0308241v1

Astron.J., v.126, p.1787 (2003)

Astronomy and Astrophysics

Astrophysics

Accepted for publication in AJ on July 2

Scientific paper

10.1086/378166

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.

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