The Stellar Content of the Polar Rings in the Galaxies NGC 2685 and NGC 4650A

Abstract

We present the results of stellar photometry of polar-ring galaxies NGC 2685 and NGC 4650A, using the archival data obtained with the Hubble Space Telescope's Wide Field Planetary Camera 2. Polar rings of these galaxies were resolved into ~800 and ~430 stellar objects in the B, V and Ic bands, considerable part of which are blue supergiants located in the young stellar complexes. The stellar features in the CM-diagrams are best represented by isochrones with metallicity Z = 0.008. The process of star formation in the polar rings of both galaxies was continuous and the age of the youngest detected stars is about 9 Myr for NGC 2685 and 6.5 Myr for NGC 4650A.

21 pages, 9 figures, AJ 2004 February, accepted

References in corpus (7)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• The Metallicity-Luminosity Relation, Effective Yields, and Metal Loss in Spiral and Irregular Galaxies
• Formation of polar ring galaxies
• A Neutral Hydrogen Survey of Polar-Ring Galaxies: I. Green Bank Observations of the Northern Sample
• The puzzle of the polar structure in NGC 4650A
• First Interferometric Observations of Molecular Gas in a Polar Ring: The Helix Galaxy NGC 2685
• HII Region Abundances in the Polar Ring of NGC 2685

Cited by in corpus (7)

• The Formation of Polar Disk Galaxies
• Kinematic modeling of disk galaxies III. The warped "Spindle" NGC 2685
• The (black hole mass)-(color) relations for early- and late-type galaxies: red and blue sequences
• Star Formation in Spiral Arms
• The stellar content of the ring in NGC 660
• Compact stellar systems in the polar ring galaxies NGC 4650A and NGC 3808B: Clues to polar disk formation
• One of Everything: The Breakthrough Listen Exotica Catalog