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UGC 8508-A DWARF GALAXY ASSOCIATED WITH THE M 101 GROUP

J. R. MOULD, D. P. SCHNEIDER, P. HARDING and G. D. BOTHUN
Publications of the Astronomical Society of the Pacific
Vol. 98, No. 606 (August 1986), pp. 732-739
Stable URL: http://www.jstor.org/stable/40678758
Page Count: 8
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UGC 8508-A DWARF GALAXY ASSOCIATED WITH THE M 101 GROUP
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Abstract

Two-color CCD photometry of UGC 8508 has resolved the system into stars. The color-magnitude diagram shows blue and red supergiants; the apparent magnitudes of the brightest stars indicate that UGC 8508 lies within 2 Mpc of the adopted 6 Mpc distance of the M 101 group. The galaxy contains a significant color gradient; star formation is confined to the central 1.5 scale lengths (0.8 kpc). UGC 8508 has a central surface brightness intermediate between bursting and quiescent dwarf irregular galaxies.

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