J/A+A/399/457 Warps in southern hemisphere galaxies (Sanchez-Saavedra+, 2003)
A catalog of warps in spiral and lenticular galaxies in the southern hemisphere.
Sanchez-Saavedra M.L., Battaner E., Guijarro A., Lopez-Corredoira M.,
Castro-Rodriguez N.
<Astron. Astrophys. 399, 457 (2003)>
=2003A&A...399..457S 2003A&A...399..457S
ADC_Keywords: Galaxy catalogs ; Morphology
Keywords: catalogs - galaxies: structure - galaxies: spiral -
galaxies: elliptical and lenticular, cD
Abstract:
A catalog of optical warps of galaxies is presented. This can be
considered complementary to that reported by Sanchez-Saavedra et al.
(1990MNRAS.246..458S 1990MNRAS.246..458S), with 42 galaxies in the northern hemisphere,
and to that by Reshetnikov & Combes (1999A&AS..138..101R 1999A&AS..138..101R), with 60
optical warps. The limits of the present catalog are: logr25>0.60,
B1<14.5, DE(2000)<0°, -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.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 79 250 Sample of spiral galaxies
table2.dat 57 38 Sample of lenticular galaxies
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See also:
J/A+A/391/519 : Warps of galaxies (Castro-Rodriguez+, 2002)
Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- PGC PGC number
7- 21 A15 --- Name Galaxy name
23- 30 F8.5 h RAhr Right ascension in decimal hours (J2000)
32- 40 F9.5 deg DEdeg Declination in decimal degree (J2000)
42- 45 F4.2 [0.1arcmin] logD25 log10 of apparent diameter at 25mag/arcsec^2<
47- 50 F4.2 [-] logR25 log10 of the axis ratio (major/minor axis)
52- 55 F4.1 --- MCode Morphological code (from LEDA) (1)
57- 58 A2 --- N/S Apparent warp rotation (2)
60- 61 I2 deg waE ? East warp angle (3)
62 A1 --- u_waE [?] ?: unknown value of waE
63 A1 --- --- [-]
64- 65 I2 deg waW ? West warp angle (3)
66 A1 --- u_waW [?] ?: unknown value of waW
67 A1 --- n_waW Note on waE-W (4)
69- 70 I2 deg betaE ? Angle between the outermost detected point
and the point where the warp starts, east
71 A1 --- --- [-]
72- 73 I2 deg betaW ? Angle between the outermost detected point
and the point where the warp starts, west
74 A1 --- u_betaW [?] ?: unknown value of betaW
76- 79 F4.2 --- alphas ? Degree of asymmetry, |waE-waW|/(waE+waW)
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Note (1): Morphological codes use the values:
-3 = E-SO
-2 = SO
0 = SOa
1 = Sa
2 = Sab
3 = Sb
4 = Sbc
5 = S?
6 = Sc
Note (2): Apparent warp rotation as follows:
N = counterclockwise shapes on the two sides of the same galaxy.
S = clockwise shapes on the two sides of the same galaxy.
LN = only one of the two sides is warped, counterclockwise
LS = only one of the two sides is warped, clockwise
U = the two warps are not antisymmetric, i.e. that the apparent warp
rotation on the two sides of the edge-on galaxies has opposite
directions.
- = unwarped
? = unclear
Note (3): Warp angle, defined as the angle between the outermost
detected point and the mean position of the plane of symmetry,
as defined by the internal unwarped region.
E indicates the side of the galaxy closer to the east.
W, the side of the galaxy closer to the west.
0 means unwarped
Note (4): Note on warp angle as follows:
c = presence of noticeable corrugations
b = observed apparent warps could actually be arms.
These are not included as true warps.
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 18-Mar-2003