The stellar content of the ring in NGC 660

G. M. Karataeva; N. A. Tikhonov; O. A. Galazutdinova; V. A. Hagen-Thorn; V. A. Yakovleva

doi:10.1051/0004-6361:20047080

Free Access

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

A&A 421, 833-837 (2004)

The stellar content of the ring in NGC 660^*

G. M. Karataeva¹^,2, N. A. Tikhonov³^,4, O. A. Galazutdinova³^,4, V. A. Hagen-Thorn¹^,2 and V. A. Yakovleva¹^,2

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

Abstract

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

Based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555.

© ESO, 2004

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The stellar content of the ring in NGC 660*

The stellar content of the ring in NGC 660^*