Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...196...26k&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 196, no. 1-2, May 1988, p. 26-30.
Astronomy and Astrophysics
Astrophysics
6
Inclination, Irregular Galaxies, Stellar Spectrophotometry, Visual Photometry, Blue Stars, Charge Coupled Devices, Color-Magnitude Diagram, Magellanic Clouds, Star Distribution, Stellar Luminosity, Vertical Distribution
Scientific paper
BV stellar photometry to V = 23 has been done in the edge-on irregular galaxy NGC 55, using both photographic and CCD material. The derived luminosity function does not differ from those found for other nearby galaxies. The apparent distribution of stars perpendicular to the major axis of the galaxy (given by H I distribution) is found to be asymmetrical. The inclination and the thickness of the old and young components of the disk of NGC 55 are discussed, using a comparison with the Large Magellanic Cloud. The best estimate for the inclination between 80.8 and 81.7 deg, the scale height of the young disk is between 0.10 kpc and 0.14 kpc, and that of the old disk from 0.18 and 0.21 kpc. These inclinations and thicknesses explain qualitatively the asymmetry in the distribution of young stars.
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