| Issue |
A&A
Volume 421, Number 3, July III 2004
|
|
|---|---|---|
| Page(s) | 833 - 837 | |
| Section | Extragalactic astronomy | |
| DOI | https://doi.org/10.1051/0004-6361:20047080 | |
| Published online | 29 June 2004 | |
The stellar content of the ring in NGC 660*
1
Astronomical Institute, St. Petersburg State University, Universitetsky pr., 28 Petrodvoretz, St. Petersburg 198504, Russia
2
Isaac Newton Institute of Chile, St. Petersburg Branch
3
Special Astrophysical Observatory, N. Arkhyz, Karachai-Circassian Rep. 369167, Russia
4
Isaac Newton Institute of Chile, SAO Branch
Corresponding author: G. Karataeva, narka@astro.spbu.ru
Received:
15
January
2004
Accepted:
27
February
2004
We present the results of stellar photometry of the polar-ring galaxy NGC 660 using the Hubble Space Telescope's archival data obtained with the Wide Field Planetary Camera 2. The final list of the resolved stars contains 550 objects, a considerable part of which are blue and red supergiants belonging to the polar ring. The analysis of the Colour–Magnitude Diagram for polar ring stars shows that it is best represented by the isochrones with metallicity 
. The process of star formation in the polar ring was continuous and the age of the youngest detected stars is about 7 Myr.
Key words: galaxies: individual: NGC 660 / galaxies: peculiar / galaxies: starburst / galaxies: stellar content
© ESO, 2004
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