Local group irregular galaxies LGS 3 and Pegasus

Journal Article · Fri Jul 01 00:00:00 EDT 1983 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/113379· OSTI ID:5910763

Christian, C A; Tully, R B

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 >10/sup 9/ yr old or 10/sup 8/--10/sup 9/ 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/sup 7/ yr. The CM diagram of LGS 3 is compared with the CM diagrams of the Pegasus irregular galaxy discussed 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.

• Research Organization: Canada-France-Hawaii Telescope Corporation and Institute for Astronomy, P.O. Box 1597, Kamuela, Hawaii 96743
• OSTI ID: 5910763
• Journal Information: Astron. J.; (United States), Vol. 88:7
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
GALAXIES
DISTANCE
PHOTOMETRY
RED GIANT STARS
LUMINOSITY
GIANT STARS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
STARS
640105* - Astrophysics & Cosmology- Galaxies
640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources