HST-NICMOS Observations of Galactic Bulges: Red Nuclei in Nearby Galaxies

Details HST-NICMOS Observations of Galactic Bulges: Red Nuclei in Nearby Galaxies HST-NICMOS Observations of Galactic Bulges: Red Nuclei in Nearby Galaxies

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998esoc...55..162p&link_type=abstract

NICMOS and the VLT: A New Era of High Resolution Near Infrared Imaging and Spectroscopy, Pula, Sardinia, Italy, June 26-27th 199

Physics

Scientific paper

We describe multi-color observations with NICMOS and WFPC2 of 20 nuclei of nearby galactic bulges of types S0-Sbc. We find that the centers of 19 out of 20 bulges are found to be dusty, with average extinction A_V between 0.6 and 0.9 mag. Our second result is that the stellar populations of galactic bulges of type S0-Sb show a very tight B-I vs. I-H relation, suggesting that the age spread among bulges of early-type spirals is small (at most about 2-3 Gyr).

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