J/A+A/673/A63 CALIFA sample nonparametric galaxy morphology (Nersesian+, 2023)
Non-parametric galaxy morphology from stellar and nebular emission
with the CALIFA sample.
Nersesian A., Zibetti S., D'Eugenio F., Baes M.
<Astron. Astrophys. 673, A63 (2023)>
=2023A&A...673A..63N 2023A&A...673A..63N (SIMBAD/NED BibCode)
ADC_Keywords: Galaxy catalogs ; Morphology ; Optical
Keywords: galaxies: structure - galaxies: spiral -
galaxies: elliptical and lenticular, cD - galaxies: ISM
Abstract:
We present a non-parametric morphology analysis of the stellar
continuum and nebular emission lines for a sample of local galaxies.
We explore the dependence of the various morphological parameters on
wavelength and morphological type. Our goal is to quantify the
difference in morphology between the stellar and nebular components.
We derived the non-parametric morphological indicators of 364 galaxies
from the Calar Alto Legacy Integral Field Area (CALIFA) Survey. To
calculate those indicators, we applied the StatMorph package on the
high-quality integral field spectroscopic data cubes, as well as to
the most prominent nebular emission-line maps, namely
[OIII]λ5007, Hα, and [NII]λ6583.
We show that the physical size of galaxies, M20 index, and
concentration have a strong gradient from blue to red optical
wavelengths. We find that the light distribution of the nebular
emission is less concentrated than the stellar continuum. A comparison
between the non-parametric indicators and the galaxy physical
properties revealed a very strong correlation of the concentration
with the specific star formation rate and morphological type.
Furthermore, we explore how the galaxy inclination affects our
results. We find that edge-on galaxies show a more rapid change in
physical size and concentration with increasing wavelength due to the
increase in the optical free path.
We conclude that the apparent morphology of galaxies originates from
the pure stellar distribution, but the morphology of the interstellar
medium presents differences with respect to the morphology of the
stellar component. Our analysis also highlights the importance of dust
attenuation and galaxy inclination in the measurement of
non-parametric morphological indicators, especially in the wavelength
range 4000-5000Å.
Description:
table mptrends.dat contains the median trends of the nonparametric
morphological properties (logRhalfRhalf_5000, Gini, M20,
Concentration, Asymmetry), as a function of restframe wavelength,
presented in Fig.4 of the paper. The galaxies were binned according to
their morphological type into E-S0a, Sa-Sb, and Sbcd-Sd.
table mp.dat contains the individual galaxy values for the three main
morphological parameters, i.e. the Gini index, M20, and Concnetration,
as measured from the stellar continuum, and the nebular emission maps
of [OIII], Ha, and [NII]. We have included all measured values from
our analysis, which are presented in Fig. 5 and Fig. 10, including the
values for the 37 flagged galaxies.
The tables contain the nonparametric morphological indices for each
galaxy in our sample (Rhalf_ellip, Gini, M20, Concentration,
Asymmetry, Smoothness), as a function of restframe wavelength,
presented in Fig.3 of the paper. The spectra were binned in wavelength
to smooth out the noise. Wavelength elements that were flagged have
been masked out.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
mptrends.dat 323 1448 Median trends of the nonparametric morphological
properties
mp.dat 886 364 Individual galaxy values for the three main
morphological parameters
tab/* . 334 Individual tables for nonparametric
morphological indices of each galaxy
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Byte-by-byte Description of file: mptrends.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 F18.13 --- Restlambda Restframe wavelength (Walcher et al.,
2014A&A...569A...1W 2014A&A...569A...1W)
20- 41 E22.19 --- logRhE-S0a log median Rhalf size ratio for
E-S0a types
43- 64 E22.19 --- logRhSa-Sb log median Rhalf size ratio for
Sa-Sb types
66- 87 E22.19 --- logRhSbcd-Sd log median Rhalf size ratio for
Sbcd-Sd types
89-106 F18.16 --- GiniE-S0a Median Gini index for E-S0a types
108-125 F18.16 --- GiniSa-Sb Median Gini index for Sa-Sb types
127-145 F19.17 --- GiniSbcd-Sd Median Gini index for Sbcd-Sd types
147-165 F19.16 --- M20E-S0a Median M20 index for E-S0a types
167-185 F19.16 --- M20Sa-Sb Median M20 index for Sa-Sb types
187-205 F19.16 --- M20Sbcd-Sd Median M20 index for Sbcd-Sd types
207-224 F18.16 --- CE-S0a Median Concentration for E-S0a types
226-243 F18.16 --- CSa-Sb Median Concnetration for Sa-Sb types
245-262 F18.16 --- CSbcd-Sd Median Concnetration for Sbcd-Sd types
264-283 F20.18 --- AE-S0a Median Asymmetry for E-S0a types
285-303 F19.17 --- ASa-Sb Median Asymmetry for Sa-Sb types
305-323 F19.17 --- ASbcd-Sd Median Asymmetry for Sbcd-Sd types
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Byte-by-byte Description of file: mp.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- Name Galaxy name
15- 16 I2 h RAh Right ascension (J2000)
18- 19 I2 min RAm Right ascension (J2000)
21- 22 I2 s RAs Right ascension (J2000)
24 A1 --- DE- Declination sign (J2000)
25- 26 I2 deg DEd Declination (J2000)
28- 29 I2 arcmin DEm Declination (J2000)
31- 32 I2 arcsec DEs Declination (J2000)
34- 39 F6.4 --- zsp Spectroscopic redshift (Walcher et al.,
2014A&A...569A...1W 2014A&A...569A...1W)
41- 57 F17.14 [Msun] logMass Logarithm of stellar mass (Sanchez et al.,
2017MNRAS.469.2121S 2017MNRAS.469.2121S, Cat. J/MNRAS/469/2121)
59- 78 F20.17 [Msun/yr] logSFR Logarithm of star-formation rate (Sanchez et
al., 2017MNRAS.469.2121S 2017MNRAS.469.2121S,
Cat. J/MNRAS/469/2121)
80 A1 --- HType Hubble type (Walcher et al.,
2014A&A...569A...1W 2014A&A...569A...1W)
82- 83 A2 --- subHType Hubble subtype (Walcher et al.,
2014A&A...569A...1W 2014A&A...569A...1W)
85 I1 --- AGNflag [0/2] AGN flag (Lacerda et al.,
2020MNRAS.492.3073L 2020MNRAS.492.3073L,
Cat. J/MNRAS/492/3073) (1)
87- 91 F5.2 deg incl Inclination (Walcher et al.,
2014A&A...569A...1W 2014A&A...569A...1W)
93 A1 --- merg [IM] Merger type (Walcher et al.,
2014A&A...569A...1W 2014A&A...569A...1W) (2)
95-113 F19.17 --- Ginisc Median Gini index of the stellar continuum
emission
115-135 F21.19 --- e_Ginisc Ginisc lower error
137-157 F21.19 --- E_Ginisc Ginisc upper error
159-177 F19.16 --- M20sc Median M20 index of the stellar continuum
emission
179-198 F20.18 --- e_M20sc M20sc lower error
200-219 F20.18 --- E_M20sc M20sc upper error
221-238 F18.16 --- Csc Median Concentration index of the stellar
continuum emission
240-259 F20.18 --- e_Csc Csc lower error
261-280 F20.18 --- E_Csc Csc upper error
282-300 F19.17 --- GiniOIII The Gini index of the [OIII] emission map
302-322 E21.19 --- e_GiniOIII GiniOIII lower error
324-344 E21.19 --- E_GiniOIII GiniOIII upper error
346-365 F20.17 --- M20OIII The M20 index of the [OIII] emission map
367-387 F21.19 --- e_M20OIII M20OIII lower error
389-409 F21.19 --- E_M20OIII M20OIII upper error
411-428 F18.16 --- COIII The Concentration index of the
[OIII] emission map
430-450 F21.19 --- e_COIII COIII lower error
452-472 F21.19 --- E_COIII COIII upper error
474 I1 --- flagOIII [0/1] Statmorph flag for [OIII] (3)
476-494 F19.17 --- GiniHa The Gini index of the Hα emission map
496-516 E21.19 --- e_GiniHa GiniHa lower error
518-538 E21.19 --- E_GiniHa GiniHa upper error
540-558 F19.16 --- M20Ha The M20 index of the Hα emission map
560-580 F21.19 --- e_M20Ha M20Ha lower error
582-602 F21.19 --- E_M20Ha M20Ha upper error
604-621 F18.16 --- CHa The Concentration index of the Hα
emission map
623-643 F21.19 --- e_CHa CHa lower error
645-665 E21.19 --- E_CHa CHa upper error
667 I1 --- flagHa [0/1] Statmorph flag for Hα (3)
669-687 F19.17 --- GiniNII The Gini index of the [NII] emission map
689-709 E21.19 --- e_GiniNII GiniNII lower error
711-731 E21.19 --- E_GiniNII GiniNII upper error
733-751 F19.16 --- M20NII The M20 index of the [NII] emission map
753-773 F21.19 --- e_M20NII M20NII lower error
775-795 F21.19 --- E_M20NII M20NII upper error
797-814 F18.16 --- CNII The Concentration index of the [NII]
emission map
816-836 E21.19 --- e_CNII CNII lower error
838-858 F21.19 --- E_CNII CNII upper error
860 I1 --- flagNII [0/1] Statmorph flag for [NII] (3)
862-886 A25 --- Table Name of the table with nonparametric
morphological indices in subdirectory tab
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Note (1): AGN flag as follows:
0 = non-AGN
1 = Type-I AGN
2 = Type-II AGN
Note (2): Merger type as follows:
I = isolated
M = Merging
Note (3): Statmorph flag as follows:
0 = reliable
1 = unreliable
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Byte-by-byte Description of file: tab/*
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 F7.2 0.1nm Restlambda Restframe wavelength (Walcher et al.,
2014A&A...569A...1W 2014A&A...569A...1W) (restframe_wavelength)
9- 15 F7.4 arcsec Rh Elliptical aperture Rhalf size (Rhalf_ellip)
17- 26 F10.6 --- Gini Gini index (Gini)
28- 36 F9.5 --- M20 M20 index (M20)
38- 46 F9.5 --- C Concentration index (Concentration)
48- 57 F10.8 --- A ?=- Asymmetry index (Asymmetry)
59- 69 F11.8 --- Smooth ?=- Smoothness index (Smoothness)
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Acknowledgements:
Angelos Nersesian, angelos.nersesian(at)ugent.be
(End) Patricia Vannier [CDS] 06-Mar-2023