J/ApJ/826/71 Growth curves of CALIFA spiral galaxies (Iglesias-Paramo+, 2016)
Aperture effects on the oxygen abundance determinations from CALIFA data.
Iglesias-Paramo J., Vilchez J.M., Rosales-Ortega F.F., Sanchez S.F.,
Duarte Puertas S., Petropoulou V., Gil de Paz A., Galbany L., Molla M.,
Catalan-Torrecilla C., Castillo Morales A., Mast D., Husemann B.,
Garcia-Benito R., Mendoza M.A., Kehrig C., Perez-Montero E., Papaderos P.,
Gomes J.M., Walcher C.J., Gonzalez Delgado R.M., Marino R.A.,
Lopez-Sanchez A.R., Ziegler B., Flores H., Alves J.
<Astrophys. J., 826, 71-71 (2016)>
=2016ApJ...826...71I 2016ApJ...826...71I (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, spectra ; Spectroscopy ; Redshifts
Keywords: galaxies: abundances; galaxies: general; galaxies: ISM
Abstract:
This paper aims to provide aperture corrections for emission lines in
a sample of spiral galaxies from the Calar Alto Legacy Integral Field
Area Survey (CALIFA; Sanchez+, 2012A&A...538A...8S 2012A&A...538A...8S) database. In
particular, we explore the behavior of the
log([OIII]λ5007/Hβ)/([NII]λ6583/Hα) (O3N2)
and log[NII]λ6583/Hα (N2) flux ratios since they are
closely connected to different empirical calibrations of the oxygen
abundances in star-forming galaxies. We compute the median growth
curves of Hα, Hα/Hβ, O3N2, and N2 up to 2.5R50 and
1.5 disk Reff. These distances cover most of the optical spatial
extent of the CALIFA galaxies. The growth curves simulate the effect
of observing galaxies through apertures of varying radii. We split
these growth curves by morphological types and stellar masses to check
if there is any dependence on these properties. The median growth
curve of the Hα flux shows a monotonous increase with radius
with no strong dependence on galaxy inclination, morphological type,
and stellar mass. The median growth curve of the Hα/Hβ
ratio monotonically decreases from the center toward larger radii,
showing for small apertures a maximum value of ∼10% larger than the
integrated one. It does not show any dependence on inclination,
morphological type, and stellar mass. The median growth curve of N2
shows a similar behavior, decreasing from the center toward larger
radii. No strong dependence is seen on the inclination, morphological
type, and stellar mass. Finally, the median growth curve of O3N2
increases monotonically with radius, and it does not show dependence
on the inclination. However, at small radii it shows systematically
higher values for galaxies of earlier morphological types and for high
stellar mass galaxies. Applying our aperture corrections to a sample
of galaxies from the SDSS survey at 0.02≤z≤0.3 shows that the
average difference between fiber-based and aperture-corrected oxygen
abundances, for different galaxy stellar mass and redshift ranges,
reaches typically to ∼11%, depending on the abundance calibration
used. This average difference is found to be systematically biased,
though still within the typical uncertainties of oxygen abundances
derived from empirical calibrations. Caution must be exercised when
using observations of galaxies for small radii (e.g., below 0.5 Reff)
given the high dispersion shown around the median growth curves. Thus,
the application of these median aperture corrections to derive
abundances for individual galaxies is not recommended when their
fluxes come from radii much smaller than either R50 or Reff.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table21.dat 33 780 *Ratio of the Hα flux and 1-σ
dispersions of the aperture corrections for fixed
apertures of either 10 or 3.3kpc diameter
table22.dat 33 780 *Ratio of the Hα/Hβ and 1-σ
dispersions of the aperture corrections for fixed
apertures of either 10 or 3.3kpc diameter
table23.dat 36 780 *Difference of the N2 values and 1-σ
dispersions of the aperture corrections for fixed
apertures of either 10 or 3.3kpc diameter
table24.dat 36 1656 *Difference of the O3N2 values and 1-σ
dispersions of the aperture corrections for fixed
apertures of either 10 or 3.3kpc diameter
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Note on table21.dat and table22.dat : Ratio of the Hα (table 21) or
Hα/Hβ (table 22) flux contained in either the SDSS or SAMI
apertures at different redshifts to the Hα or Hα/Hβ flux
within a circular aperture of either 10 or 3.3kpc diameter for the CALIFA
spirals whose diameter aperture is completely covered by PMAS/PPAK.
Note on table23.dat and table24.dat : Difference of the
log[NII]λ6583/Hα (N2) (table 23) or
log([OIII]λ5007/Hβ)/([NII]λ6583/Hα) (O3N2) (table 24)
contained in either the SDSS or SAMI apertures at different redshifts to the
N2 or O3N2 within a circular aperture of 10 or 3.3kpc diameter for the CALIFA
spirals whose diameter apertures are completely covered by PMAS/PPAK.
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See also:
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
III/250 : The VIMOS VLT deep survey (VVDS-DEEP) (Le Fevre+ 2005)
VII/250 : The 2dF Galaxy Redshift Survey (2dFGRS) (2dFGRS Team, 1998-2003)
J/A+A/587/A70 : CALIFA face-on spiral gal. oxygen (Sanchez-Menguiano+, 2016)
J/A+A/585/A47 : CALIFA color/metallicity gradients (Marino+, 2016)
J/A+A/581/A103 : CALIFA survey across the Hubble sequence (Gonzalez+, 2015)
J/A+A/576/A135 : CALIFA DR2 (Garcia-Benito+, 2015)
J/MNRAS/446/1567 : SAMI Galaxy Survey: EDR (Allen+, 2015)
J/A+A/559/A114 : Updated O3N2 and N2 abundance indicators (Marino+, 2013)
J/MNRAS/421/1569 : Properties of 18286 SDSS radio galaxies (Best+, 2012)
J/MNRAS/413/813 : ATLAS3D project. I. (Cappellari+, 2011)
J/MNRAS/404/1639 : MILES base models + new line index system (Vazdekis+, 2010)
J/ApJS/172/70 : zCOSMOS-bright catalog (Lilly+, 2007)
J/MNRAS/371/703 : MILES library of empirical spectra (Sanchez-Blazquez+, 2006)
J/PASP/117/227 : Properties of 101 galaxies from the NFGS (Kewley+, 2005)
http://califa.caha.es/ : CALIFA 3rd data release
http://www.sdss3.org/ : SDSS-III home page
Byte-by-byte Description of file: table21.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 F4.1 arcsec Fiber [3/15] Angular diameter of SDSS/SAMI aperture (G1)
6- 9 F4.1 kpc Refer [3/10] Linear diameter of fixed reference aperture
11- 15 F5.3 --- z [0.01/0.6] Redshift
17- 21 F5.3 --- b_Ha The 15.86% (-1σ) of the Hα aperture
correction distribution
23- 27 F5.3 --- Ha [0.05/1.2] The 50% (median) of the Hα
aperture correction distribution
(αAng/αLin)50
29- 33 F5.3 --- B_Ha The 84.14% (+1σ) of the Hα aperture
correction distribution
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Byte-by-byte Description of file: table22.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 F4.1 arcsec Fiber [3/15] Angular diameter of SDSS/SAMI aperture (G1)
6- 9 F4.1 kpc Refer [3/10] Linear diameter of fixed reference aperture
11- 15 F5.3 --- z [0.01/0.6] Redshift
17- 21 F5.3 --- b_Ha/Hb The 15.86% (-1σ) of the Hα/Hβ
aperture correction distribution
23- 27 F5.3 --- Ha/Hb [0.05/1.2] 50% (median) of the Hα/Hβ
aperture correction distribution
(αβAng/αβLin)50
29- 33 F5.3 --- B_Ha/Hb The 84.14% (+1σ) of the Hα/Hβ
aperture correction distribution
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Byte-by-byte Description of file: table23.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 F4.1 arcsec Fiber [3/15] Angular diameter of SDSS/SAMI aperture (G1)
6- 9 F4.1 kpc Refer [3/10] Linear diameter of fixed reference aperture
11- 15 F5.3 --- z [0.01/1] Redshift
17- 22 F6.3 --- b_dN2 The 15.86% (-1σ) of the N2 aperture
correction distribution
24- 29 F6.3 --- dN2 [-0.2/0.1] The 50% (median) of the N2
aperture correction distribution
(N2Ang-N2Lin)50
31- 36 F6.3 --- B_dN2 The 84.14% (+1σ) of the N2 aperture
correction distribution
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table24.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 F4.1 arcsec Fiber [3/15] Angular diameter of SDSS/SAMI aperture (G1)
6- 9 F4.1 kpc Refer [3/10] Linear diameter of fixed reference aperture
11- 15 F5.3 --- z [0.01/1] Redshift
17- 22 F6.3 --- b_dO3N2 The 15.86% (-1σ) of the O3N2 aperture
correction distribution
24- 29 F6.3 --- dO3N2 [-0.2/0.1] The 50% (median) of the O3N2
aperture correction distribution
(03N2Ang-03N2Lin)50
31- 36 F6.3 --- B_dO3N2 The 84.14% (+1σ) of the O3N2 aperture
correction distribution
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Global note:
Note (G1): Where the 3" aperture is for SDSS and the 15" aperture is for SAMI.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 26-Sep-2016