OASIS high-resolution integral field spectroscopy of the SAURON ellipticals and lenticulars
Abstract
We present a summary of high-spatial resolution follow-up observations of the elliptical (E) and lenticular (S0) galaxies in the SAURON survey using the OASIS integral field spectrograph. The OASIS/observations explore the central 8″×10″ regions of these galaxies using a spatial sampling four times higher than SAURON, often revealing previously undiscovered features. Around 75% (31/48) of the SAURON E/S0s with central velocity dispersion ≳ 120 km s-1/ were observed with OASIS, covering well the original SAURON representative sample. We present here an overview of this follow-up survey, and some preliminary results on individual objects, including a previously unreported counter-rotating core in NGC 4382; the decoupled stellar and gas velocity fields of NGC 2768; and the strong age gradient towards the centre of NGC 3489.
- Publication:
-
Astronomische Nachrichten
- Pub Date:
- February 2004
- DOI:
- 10.1002/asna.200310184
- arXiv:
- arXiv:astro-ph/0311204
- Bibcode:
- 2004AN....325..100M
- Keywords:
-
- galaxies: individual (NGC 2768;
- NGC 3489;
- NGC 4382);
- galaxies: elliptical and lenticular;
- galaxies: kinematics and dynamics;
- galaxies: stellar content;
- Astrophysics
- E-Print:
- 4 pages, 5 figures. Accepted for publication in Astron. Nachr. as refereed proceedings of Euro3D Science Workshop, IoA Cambridge, May 2003