Discovery of a new M 32-like "Compact Elliptical" galaxy in the halo of the Abell 496 cD galaxy

Chilingarian, I.; Cayatte, V.; Chemin, L.; Durret, F.; Lagana, T. F.; Adami, C.; Slezak, E.

Abstract

Aims. "Compact ellipticals" are so rare that a search for M 32 analogs is needed to ensure the very existence of this class. Methods. We report here the discovery of A496cE, a M 32 twin in the cluster Abell 496, located in the halo of the central cD. Results. Based on CFHT and HST imaging we show that the light profile of A496cE requires a two component fit: a Sersic bulge and an exponential disc. The spectrum of A496cE obtained with the ESO-VLT FLAMES/Giraffe spectrograph can be fit by a stellar synthesis spectrum dominated by old stars, with high values of [Mg/Fe] and velocity dispersion. Conclusions. The capture of A496cE by the cD galaxy and tidal stripping of most of its disc are briefly discussed.

Más información

Título según WOS: ID WOS:000245686800006 Not found in local WOS DB
Título de la Revista: ASTRONOMY & ASTROPHYSICS
Volumen: 466
Número: 2
Editorial: EDP SCIENCES S A
Fecha de publicación: 2007
Página de inicio: L21
Página final: L24
DOI:

10.1051/0004-6361:20077291

Notas: ISI