J/ApJ/788/L39 AMIGA galaxies structural parameters (Fernandez Lorenzo+, 2014)
Are (pseudo)bulges in isolated galaxies actually primordial relics?
Fernandez Lorenzo M., Sulentic J., Verdes-Montenegro L., Blasco-Herrera J.,
Argudo-Fernandez M., Garrido J., Ramirez-Moreta P., Ruiz J.E.,
Sanchez-Exposito S., Santander-Vela J.D.
<Astrophys. J., 788, L39 (2014)>
=2014ApJ...788L..39F 2014ApJ...788L..39F
ADC_Keywords: Galaxies, photometry ; Morphology
Keywords: galaxies: fundamental parameters - galaxies: general -
galaxies: interactions
Abstract:
We present structural parameters and (g-i) bulge/disk colors for a
large sample (189) of isolated AMIGA galaxies. The structural
parameters of bulges were derived from the two-dimensional
bulge/disk/bar decomposition of Sloan Digital Sky Survey i-band images
using GALFIT. Galaxies were separated between classical bulges
(nb>2.5) and pseudobulges (nb<2.5), resulting in a dominant
pseudobulge population (94%) with only 12 classical bulges. In the
<µe>-Replane, pseudobulges are distributed below the elliptical
relation (smaller Re and fainter µe), with the closest region
to the Kormendy relation populated by those pseudobulges with larger
values of B/T. We derived (g-i) bulge colors using aperture photometry
and find that pseudobulges show median colors (g-i)b∼1.06, while
their associated disks are much bluer, (g-i)d∼0.77. Moreover, 64%
(113/177) of pseudobulges follow the red sequence of early-type
galaxies. Bluer pseudobulges tend to be located in galaxies with the
highest likelihood of tidal perturbation. The red bulge colors and low
B/T values for AMIGA isolated galaxies are consistent with an early
formation epoch and not much subsequent growth. Properties of bulges
in isolated galaxies contrast with a picture where pseudobulges grow
continuously via star formation. They also suggest that environment
could be playing a role in rejuvenating the pseudobulges.
Description:
Physical parameters for 189 spiral isolated galaxies from AMIGA
sample. For each galaxy, structural parameters from the bulge/disk/bar
decomposition are given as well as bulge and disk colors.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 295 189 Physical parameters for the AMIGA galaxies in
our sample
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See also:
J/A+A/411/391 : AMIGA. 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)
J/A+A/532/A117 : AMIGA. VIII Flux ratio asymmetry parameter (Espada+, 2011)
J/A+A/534/A102 : AMIGA. IX Molecular gas properties (Lisenfeld+, 2011)
J/A+A/540/A47 : AMIGA. X Isolated galaxy colors (Fernandez Lorenzo+, 2012)
J/A+A/545/A15 : AMIGA. XI Optical nuclear activity (Sabater+, 2012)
J/MNRAS/434/325 : 452 AMIGA galaxies physical parameters
(Fernandez Lorenzo+ 2013)
J/A+A/560/A9 : AMIGA. Revision of the isolation degree
(Argudo-Fernandez+, 2013)
http://amiga.iaa.es : AMIGA Home Page
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 (VII/82) number, <K73 NNNN> in Simbad
6 I1 --- TT RC3 morphological type (1)
8- 21 A14 --- Bulge Type of bulge according to Fig. 1
23- 27 I5 km/s HRV Heliocentric Radial Velocity (1)
29- 33 F5.1 Mpc D70 Distance for H0=70km/s/Mpc (1)
35- 39 F5.2 --- Qkar [-4.2/-2] Tidal strength (2)
41- 47 F7.3 mag iMAG Total absolute magnitude in i-band
49- 53 F5.3 --- B/T [0/1] Bulge-to-total luminosity ratio
55- 59 F5.2 mag imag.d GALFIT disk magnitude in i-band
61- 64 F4.2 mag e_imag.d Error in imag.d
66- 70 F5.2 arcsec hR Disk scalelength along semimajor axis
72- 75 F4.2 arcsec e_hR Error in hR
77- 80 F4.2 --- b/a.d [0/1] Disk semiaxes ratio
82- 85 F4.2 --- e_b/a.d Error in b/a.d
87- 91 F5.2 mag imag.b GALFIT bulge magnitude in i-band
93- 96 F4.2 mag e_imag.b Error in imag.b
98-102 F5.2 arcsec ae.b Bulge effective radius along semimajor axis
104-107 F4.2 arcsec e_ae.b Error in ae.b
109-112 F4.2 --- n.b Bulge Sersic index
114-117 F4.2 --- e_n.b Error in n.b
119-122 F4.2 --- b/a.b [0/1] Bulge semiaxes ratio
124-127 F4.2 --- e_b/a.b Error in b/a.b
129-133 F5.2 mag imag.B ? GALFIT bar magnitude in i-band
135-138 F4.2 mag e_imag.B ? Error in imag.B
140-144 F5.2 arcsec ae.B ? Bar effective radius along semimajor axis
146-149 F4.2 arcsec e_ae.B ? Error in ae.B
151-154 F4.2 --- n.B ? Bar Sersic index
156-159 F4.2 --- e_n.B ? Error in n.B
161-164 F4.2 --- b/a.B [0/1]? Bar semiaxes ratio
166-169 F4.2 --- e_b/a.B ? Error in b/a.B
171-176 F6.3 mag/arcsec+2 mue Bulge i-band average surface brightness
within the effective radius
178-182 F5.3 mag/arcsec+2 e_mue Error estimate in mue
184-188 F5.3 kpc Re70 Circularized bulge effective radius
for H0=70km/s/Mpc
190-194 F5.3 kpc e_Re70 Error estimate in Re70
196-200 F5.2 mag gmag.d ? GALFIT disk magnitude in g-band
202-205 F4.2 mag e_gmag.d ? Error in gmag-d
207-211 F5.3 mag Ag Galactic extinction in g-band
213-217 F5.3 mag Ai Galactic extinction in i-band
219-224 F6.3 mag gKcor K-correction in g-band derived from
global photometry
226-231 F6.3 mag iKcor K-correction in i-band derived from
global photometry
233-237 F5.3 mag a(g-i) Internal extinction correction
in (g-i) color index
239-242 F4.2 mag (g-i)d ? Corrected disk (g-i) color index
244-249 F6.3 arcsec elap Major axis of bulge eliptical aperture
251-256 F6.3 mag gmagap Bulge aperture magnitude in g-band
258-262 F5.3 mag e_gmagap Error in gmag-a
264-269 F6.3 mag imagap Bulge aperture magnitude in i-band
271-275 F5.3 mag e_imagap Error in imag-a
277-282 F6.3 mag gKcora g-band K-correction derived from bulge
aperture photometry
284-289 F6.3 mag iKcora i-band K-correction derived from bulge
aperture photometry
291-295 F5.3 mag (g-i)b Corrected bulge (g-i) color index
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Note (1): From Fernandez Lorenzo et al. 2012 (J/A+A/540/47)
Note (2): From Argudo-Fernandez et al. 2013 (J/A+A/560/A9)
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Acknowledgements:
Mirian Fernandez Lorenzo, mirian(at)iaa.es
(End) Patricia Vannier [CDS] 26-Jun-2014