A detailed two-dimensional stellar population study of M32 |
| |
| Authors: | C. del Burgo R. F. Peletier A. Vazdekis S. Arribas E. Mediavilla |
| |
| Affiliation: | Instituto d'Astrofísica de Canarias, Vía Láctea, E-38200 La Laguna, Tenerife, Spain;Institut d'Astrophysique de Paris, 98bis Boulevard Arago, F-75014 Paris, France;School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD;Department of Physics, University of Durham, South Road, Durham DH1 3LE;Consejo Superior de Investigaciones Científicas, Instituto de Astrofisca de Canarias, Spain |
| |
| Abstract: | We present integral field spectroscopy of the circumnuclear region of M32 obtained with the 2D_FIS fibre optics spectrographs installed at the 4.2-m William Herschel Telescope. From these spectra line-strength maps have been made for about 20 absorption lines, mostly belonging to the Lick system. We find good agreement with long-slit line-strength profiles in the literature, and no radial gradients in the azimuthally averaged absorption line indices. We fit the mean values of each spectral index and colours from the literature for the inner regions of M32 to the models of Vazdekis et al. and Worthey, finding that the present data can be well interpreted for a single stellar population of an intermediate age (∼4 Gyr) and a metallicity similar to solar |
| |
| Keywords: | techniques: spectroscopic galaxies: individual: M32 galaxies: nuclei galaxies: stellar content |
|
|
