Volume 417, Number 2, April II 2004
|Page(s)||479 - 486|
|Published online||19 March 2004|
Carbon star survey of Local Group galaxies*
IX. The spheroidal galaxy NGC 185
INAF, Osservatorio Astronomico di Roma, Viale del Parco Mellini 84, 00136 Roma, Italia
2 Département de Physique, Université de Montréal, CP 6128, Succursale Centre-Ville, Montréal, Québec, H3C 3J7, Canada e-mail: firstname.lastname@example.org
Corresponding author: P. Battinelli, email@example.com
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 , corresponding to , 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, , demonstrating that the intermediate-age population of NGC 185 is more concentrated than its old population. A tidal radius, is determined from red giant star counts. The C/M ratio of NGC 185 is 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.
Key words: galaxies: individual: NGC 185 / galaxies: stellar content / galaxies: structure
© ESO, 2004
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.