The Lowest Luminosity Galaxy Yet: Andromeda IX, a New Satellite of M31

Details The Lowest Luminosity Galaxy Yet: Andromeda IX, a New Satellite of M31 The Lowest Luminosity Galaxy Yet: Andromeda IX, a New Satellite of M31

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.1706z&link_type=abstract

American Astronomical Society Meeting 204, #17.06; Bulletin of the American Astronomical Society, Vol. 36, p.682

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Scientific paper

We report the discovery of a new dwarf spheroidal satellite of M31, Andromeda IX, based on resolved stellar photometry from the Sloan Digital Sky Survey (SDSS). We have estimated its distance and other physical properties, and compared these to the properties of a previously known dwarf spheroidal companion, Andromeda V, also observed by SDSS. Based on our measurements, Andromeda IX is the lowest surface brightness galaxy found to date (μ V,0 ˜ 27.0 mag arcsec-2), and, given its distance, (m - M)0 ˜ 24.5 (805 kpc), Andromeda IX is the faintest galaxy as well (MV ˜ -8.3).

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