J/MNRAS/355/1251 Bar-induced strengths in spiral galaxies (Laurikainen+, 2004)
Bar-induced perturbation strengths of the galaxies in the
Ohio State University Bright Galaxy Survey - I.
Laurikainen E., Salo H., Buta R., Vasylyev S.
<Mon. Not. R. Astron. Soc., 355, 1251-1271 (2004)>
=2004MNRAS.355.1251L 2004MNRAS.355.1251L
ADC_Keywords: Galaxies, nearby ; Morphology
Keywords: galaxies: spiral - galaxies: statistics
Abstract:
Bar-induced perturbation strengths are calculated for a well-defined
magnitude-limited sample of 180 spiral galaxies, based on the Ohio
State University Bright Galaxy Survey. We use a gravitational torque
method, the ratio of the maximal tangential force to the mean
axisymmetric radial force, as a quantitative measure of the bar
strength.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 57 180 Structural parameters from 2D decompositions
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See also:
J/ApJS/143/73 : OSUBGS, Morphology of spiral galaxies (Eskridge+, 2002)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1 A1 --- Sample [O2] 2=2MASS, O=OSUBGS (J/ApJS/143/73)
(Ohio State University Bright Galaxy Survey)
4- 12 A9 --- Galaxy Galaxy name
13- 15 A3 --- n_Galaxy Note on Galaxy (1)
17- 22 F6.3 arcsec Reff ? Effective radius of the bulge
23 A1 --- u_Reff Uncertainty flag on Reff
26- 30 F5.3 --- beta ? beta index of the bulge
31 A1 --- u_beta Uncertainty flag on beta
33- 37 F5.1 arcsec hr Exponential scale-length of the disc
38 A1 --- u_hr Uncertainty flag on hr
39- 40 A2 --- n_hr [B MH] Band used for the decomposition , if
not H-band
42- 46 F5.3 --- B/D ? Bulge-to-disk ratio
47 A1 --- u_B/D Uncertainty flag on B/D
48 A1 --- n_B/D [B] Band used for the decomposition, if not
H-band
50- 57 A8 --- Bar/oval Indicates whether a bar/oval was fitted in
the decomposition
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Note (1): Notes on galaxies as follows:
a = Manual decomposition fit
b = H-band image not deep enough to determine hr well, but the
bulge model is reasonable
c = Bulge model is taken from the fit to the inner regions, and the
disc parameters from the fit to the outer regions of the galaxy.
d = No bar is fitted, although the galaxy is barred in RC3.
e = The number of iterations is limited in the decomposition.
f = The H-band image field is too small
g = Prominent outer ring dominates the disc
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 21-Jun-2005