NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-17 T16:30:30 PDT
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For refcode 2004A&A...417..479B:
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NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
2004A&A...417..479B Carbon star survey of Local Group galaxies IX. The spheroidal galaxy NGC 185 P. Battinelli and S. Demers Received 2 September 2003 / Accepted 15 December 2003 We used the CFH12K wide field camera to survey the carbon star population of NGC 185 using the CN-TiO technique. 145 C stars are identified with a mean <I > = 19.99 +/- 0.05, corresponding to <M_I>_ = -4.41 +/- 0.05, a mean luminosity similar to what was recently found for the C star population of NGC 147. The stellar surface density profile of NGC 185 follows a power law with an exponential scale length of 2.53 +/- 0.07 '. The surface density of C stars follows also a power law but with a smaller scale length, 1.56 +/- 0.06, demonstrating that the intermediate-age population of NGC 185 is more concentrated than its old population. A tidal radius, r_t_ = 22.5 +/- 2.2' is determined from red giant star counts. The C/M ratio of NGC 185 is 0.17 +/- 0.02 with no apparent sign of a radial gradient. We compare the carbon star populations of NGC 185 and NGC 147 to conclude that it is unlikely that they form a close pair. Keywords: galaxies: individual: NGC 185, galaxies: stellar content, galaxies: structure
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