Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001newar..45...83p&link_type=abstract
New Astronomy Reviews, Volume 45, Issue 1-2, p. 83-86.
Astronomy and Astrophysics
Astronomy
1
Scientific paper
We present the first results from a new and unique integral-field spectrograph, SAURON, for the 4.2-m William Herschel Telescope on La Palma. Based upon the TIGER concept, SAURON uses a lens array to obtain two-dimensional spectroscopy with complete spatial coverage over a field of 33''×41'' in low-resolution mode (0.94'' lenslets) and of 9''×11'' in high-resolution mode (0.26'' lenslets). The spectra cover 4800 Å to 5400 Å with a resolution of 3 Å (σ=75 km s-1). SAURON achieved first light during commissioning on the WHT on 1 February 1999. The instrument performed well and we are commencing a systematic survey of the velocity dispersions, velocity fields, and line-strength distributions in nearby ellipticals and spiral bulges. The wide field of SAURON will be crucial for unravelling complicated velocity structures. In combination with available long-slit spectroscopy of the outer regions of the galaxies, HST spectra of the nuclei, and HST imaging, we will constrain the intrinsic shapes, mass-to-light ratios, and stellar populations in spheroids. In this presentation we will give a status report and preliminary results from our first science run in February 1999.
Allington-Smith Jeremy R.
Bacon Roland
Bureau Martin
Carollo Marcella C.
Copin Yannick
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