Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...292..425s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 292, no. 2, p. 425-429
Astronomy and Astrophysics
Astronomy
9
Abundance, Astronomical Models, Brightness Distribution, Elliptical Galaxies, Galactic Evolution, Galactic Structure, Helium, Infrared Astronomy, Iron, Astronomical Photometry, Charge Coupled Devices, Image Processing, Infrared Imagery, Optical Transfer Function, Point Spread Functions
Scientific paper
We have obtained the E-W surface brightness profile of the standard elliptical NGC 3379 from overlapping New Technology Telescope (NTT)/SUSI frames out to approximately 5.2 min from the center of the galaxy. These observations in I include a high-resolution frame (sigmaasterisk = 0.37 sec) of the center. We find that a single isothermal core does not fit the central surface photometry of this galaxy, indicating that NGC 3379 may be the result of a more complex formation scenario than a dissipationless collapse. Combining B-band literature data with the present I-band profile we obtain a color gradient consistent with an average abundance gradient of Delta(Fe/H)/Delta log R = -0.21 +/- 0.03.
Sodemann Marianne
Thomsen Bjarne
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