A catalog of warps in spiral and lenticular galaxies in the Southern hemisphere

Free access article

Issue		A&A Volume 399, Number 2, February IV 2003


Page(s)		457 - 467
Section		Galactic structure and dynamics
DOI		http://dx.doi.org/10.1051/0004-6361:20021751

A&A 399, 457-467 (2003)
DOI: 10.1051/0004-6361:20021751

A catalog of warps in spiral and lenticular galaxies in the Southern hemisphere

M. L. Sánchez-Saavedra¹, E. Battaner¹, A. Guijarro², M. López-Corredoira³ and N. Castro-Rodríguez^{3, 4}

¹ Dpto. Física Teórica y del Cosmos, Universidad de Granada, Avd. Fuentenueva, 18002 Granada, Spain
² Centro Astronómico Hispano Alemán, 04080 Almería, Spain
³ Astronomisches Institut der Universitat Basel, Venusstrasse 7, Binningen, Switzerland
⁴ Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain

(Received 26 April 2002 / Accepted 22 November 2002)

Abstract
A catalog of optical warps of galaxies is presented. This can be considered complementary to that reported by Sánchez-Saavedra et al. (1990), with 42 galaxies in the northern hemisphere, and to that by Reshetnikov & Combes (1999), with 60 optical warps. The limits of the present catalog are: ${\rm logr}25 > 0.60, B_{\rm t}< 14.5$ , $\delta(2000) < 0^{\circ}$ , -2.5 < t < 7. Therefore, lenticular galaxies have also been considered. This catalog lists 150 warped galaxies out of a sample of 276 edge-on galaxies and covers the whole southern hemisphere, except the Avoidance Zone. It is therefore very suitable for statistical studies of warps. It also provides a source guide for detailed particular observations. We confirm the large frequency of warped spirals: nearly all galaxies are warped. The frequency and warp angle do not present important differences for the different types of spirals. However, no lenticular warped galaxy has been found within the specified limits. This finding constitutes an important restriction for theoretical models.

Key words: catalogs -- galaxies: structure -- galaxies: spiral -- galaxies: elliptical and lenticular, cD

Offprint request: M. L. Sánchez-Saavedra, malusa@ugr.es

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