The irregular galaxy Cassiopeia 1 -- a new member of the Local group

Details The irregular galaxy Cassiopeia 1 -- a new member of the Local group The irregular galaxy Cassiopeia 1 -- a new member of the Local group

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996an....317..175t&link_type=abstract

Astronomische Nachrichten, vol. 317, no. 3, p. 175.

Astronomy and Astrophysics

Astronomy

4

Scientific paper

A photometry in the V, R, I (Cousins) system has been performed for stars in the galaxy Cassiopeia 1. The resulting colour-magnitude (CM) diagram of Cas 1 reveals the existence of blue stars and the absence of red ones. From an analysis of the CM diagram of the galaxy it is concluded that A_v = 4.0 mag, and the distance modulus (m - M)_0=24.5 mag, corresponding to a distance of 790 kpc. The visual magnitude of the galaxy is V = 14fm62 (M_v = -13fm8 ) and the colour index (V - R) = 0.89 mag. From the distance determination the galaxy Cassiopeia 1 is a member of the Local group.

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