Issue |
A&A
Volume 383, Number 2, FebruaryIV 2002
|
|
---|---|---|
Page(s) | 390 - 397 | |
Section | Cosmology (including clusters of galaxies) | |
DOI | https://doi.org/10.1051/0004-6361:20011784 | |
Published online | 15 February 2002 |
ESO 603-G21: A strange polar-ring galaxy*
1
Astronomical Institute of St.Petersburg State University, 198504 St. Petersburg, Russia
2
Isaac Newton Institute of Chile, St. Petersburg Branch, Russia
3
MCT/Laboratório Nacional de Astrofísica, Caixa Postal 21, CEP:37.504-364, Itajubá, MG, Brazil e-mail: mfaundez@lna.br, mabans@lna.br
Corresponding author: V. P. Reshetnikov, resh@astro.spbu.ru
Received:
16
August
2001
Accepted:
26
November
2001
We present the results of B, V, R surface photometry of ESO 603-G21 – a galaxy with a possible polar ring. The morphological and photometric features of this galaxy are discussed. The central round object of the galaxy is rather red and presents a nearly exponential surface brightness distribution. This central structure is surrounded by a blue warped ring or disk. The totality of the observed characteristics (optical and NIR colors, strong color gradients, HI and H2 content, FIR luminosity and star-formation rate, rotation-curve shape, global mass-to-luminosity ratio, the agreement with the Tully-Fisher relation, etc.) shows that ESO 603-G21 is similar to late-type spiral galaxies. We suppose that morphological peculiarities and the possible existence of two large-scale kinematically-decoupled subsystems in ESO 603-G21 can be explained as being a result of dissipative merging of two spiral galaxies or as a consequence of a companion accretion onto a pre-existing spiral host.
Key words: galaxies: individual: ESO 603-G21 / galaxies: kinematics and dynamics / galaxies: photometry / galaxies: formation / galaxies: structure
© ESO, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.