J/A+A/532/A117 AMIGA VIII. Flux ratio asymmetry parameter (Espada+, 2011)
The AMIGA sample of isolated galaxies.
VIII. The rate of asymmetric H I profiles in spiral galaxies.
Espada D., Verdes-Montenegro L., Huchtmeier W.K., Sulentic J., Verley S.,
Leon S., Sabater J.
<Astron. Astrophys. 532, A117 (2011)>
=2011A&A...532A.117E 2011A&A...532A.117E
ADC_Keywords: Galaxy catalogs ; Galaxies, radio ; H I data ; Morphology
Keywords: atomic data - line: profiles - galaxies: ISM -
galaxies: interactions - surveys - galaxies: spirals
Abstract:
Measures of the HI properties of a galaxy are among the most sensitive
interaction diagnostic at our disposal. We report here on a study of
HI profile asymmetries (e.g., lopsidedness) in a sample of some of the
most isolated galaxies in the local Universe. This presents us with an
excellent opportunity to quantify the range of intrinsic HI
asymmetries in galaxies (i.e., those not induced by the environment)
and provides us with a zero-point calibration for evaluating these
measurements in less isolated samples.
We aim to characterize the HI profile asymmetries in a sample of
isolated galaxies and search for correlations between HI asymmetry and
their environments, as well as their optical and far infrared (FIR)
properties.
We use high signal-to-noise global HI profiles for galaxies in the
AMIGA project (Analysis of the Interstellar Medium of Isolated
GAlaxies, http://amiga.iaa.es). We restrict our study to N=166
galaxies (out of 312) with accurate measures of the HI shape
properties. We quantify asymmetries using a flux ratio parameter.
Description:
Asymmetry quantification for the HI sample of isolated galaxies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 30 318 Asymmetry quantification
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See also:
VII/82 : Catalogue of Isolated Galaxies (Karachentseva+ 1986)
J/A+A/411/391 : AMIGA project. Revised positions for CIG galaxies (Leon+ 2003)
J/A+A/436/443 : AMIGA I. Velocities of CIG galaxies (Verdes-Montenegro+ 2005)
J/A+A/449/937 : AMIGA II. Morphological refinement (Sulentic+, 2006)
J/A+A/462/507 : AMIGA III. IRAS data (Lisenfeld+, 2007)
J/A+A/470/505 : AMIGA IV. Neighbours around CIG galaxies (Verley+, 2007)
J/A+A/472/121 : AMIGA V. Isolation parameters (Verley+, 2007)
J/A+A/485/475 : AMIGA VI. Radio fluxes of the isolated galaxies (Leon+ 2008)
J/A+A/486/73 : AMIGA VII. FIR and radio study (Sabater+, 2008)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- CIG CIG number (Karatchenseva 1973, Cat. VII/82)
6 I1 --- Class [0/2] Visual classification parameter (1)
8- 12 F5.3 --- AFR Flux ratio asymmetry parameter
14- 18 F5.3 --- e1 Flux ratio asymmetry parameter uncertainty owing
to the HI profile rms
20- 24 F5.3 --- e2 Flux ratio asymmetry parameter uncertainty owing
to the mean velocity
26- 30 F5.3 --- e_AFR Final derived uncertainty of flux ratio
asymmetry parameter
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Note (1): Visual classification parameter as follows:
0 = symmetric
1 = slightly asymmetric
2 = asymmetric
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Acknowledgements:
Daniel Espada, daniel.espada(at)nao.ac.jp
References:
Leon et al., Paper I 2003A&A...411..391L 2003A&A...411..391L, Cat. J/A+A/411/391
Sulentic et al., Paper II 2006A&A...449..937S 2006A&A...449..937S Cat. J/A+A/449/937
Lisenfeld et al., Paper III 2007A&A...462..507L 2007A&A...462..507L, Cat. J/A+A/462/507
Verley et al., Paper IV 2007A&A...470..505V 2007A&A...470..505V, Cat. J/A+A/470/505
Verley et al., Paper V 2007A&A...472..121V 2007A&A...472..121V, Cat. J/A+A/472/121
Leon et al., Paper VI 2008A&A...485..475L 2008A&A...485..475L, Cat. J/A+A/485/475
Sabater et al., Paper VII 2008A&A...486...73S 2008A&A...486...73S, Cat. J/A+A/486/73
Lisenfeld et al., Paper IX 2011A&A...534A.102L 2011A&A...534A.102L, Cat. J/A+A/534/A102
Fernandez Lorenzo et al., Paper X 2012A&A...540A..47F 2012A&A...540A..47F, Cat. J/A+A/540/A47
(End) Daniel Espada [NAOJ, Japan], Patricia Vannier [CDS] 07-Jul-2011