The Old Stellar Population of NGC1569 from NICMOS data

Details The Old Stellar Population of NGC1569 from NICMOS data The Old Stellar Population of NGC1569 from NICMOS data

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998esoc...55..154a&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

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Scientific paper

To have a census of the old stellar populations of the dwarf irregular galaxies NGC 1569 and NGC 1705 and to trace the major episodes of star formation over a Hubble time in these starbursting systems, we have applied for and obtained HST/NICMOS observations in the F110W and F160W bands with the NIC2 camera. At the distance of these galaxies, the expected performances of NIC2 camera should allow one to reach and resolve with the required accuracy individual stars at the tip of the red giant branch (i.e. with an age spanning from 1 to 15 Gyr). NICMOS observations of NGC 1569 were already acquired in February 1998, while NGC 1705 will be observed in October 1998. Here we present some preliminary results on the photometric reduction of the available NICMOS data and some problems related to the use of this instrument.

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