期刊
ASTRONOMISCHE NACHRICHTEN
卷 325, 期 2, 页码 100-103出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asna.200310184
关键词
galaxies : individual (NGC 2768, NGC 3489, NGC 4382); galaxies : elliptical and lenticular; galaxies : kinematics and dynamics; galaxies : stellar content
We present a summary of high-spatial resolution follow-up observations of the elliptical (E) and lenticular (SO) galaxies in the SAURON survey using the OASIS integral field spectrograph. The OASIS observations explore the central 8 x 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/SOs with central velocity dispersion greater than or similar to 120 kin 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 NGC4382; the decoupled stellar and gas velocity fields of NGC 2768; and the strong age gradient towards the centre of NGC 3489.
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