Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983aj.....88..934c&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 88, July 1983, p. 934-938.
Astronomy and Astrophysics
Astronomy
30
Astrometry, Dwarf Galaxies, Local Group (Astronomy), Red Giant Stars, Stellar Color, Stellar Evolution, Stellar Magnitude, Astronomical Photometry, Charge Coupled Devices, Distance, Galactic Structure, Hydrogen Clouds, Luminosity
Scientific paper
The Galileo IFA 500 x 500 CCD camera was used to resolve red giant stars in the gas-rich dwarf galaxy LGS 3 at magnitudes fainter than V = 21.8. Depending on whether these stars are more than 10 to the 9th yr old or 10 to the 8th - 10 to the 9th yr old, the distance of the galaxy is 0.7-1.2 Mpc. Although H I gas has been detected in this system, there has been no significant star formation for at least the last 7 x 10 to the 7th yr. The CM diagram of LGS 3 is compared with the CM diagrams of the Pegasus irregular galaxy discused by Hoessel and Mould. A distance of 1.3 Mpc is suggested for Pegasus, rather than the larger distance preferred by Hoessel and Mould or the very much larger distance offered by Sandage and Tammann.
Christian Carol A.
Tully Brent R.
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