J/ApJ/903/52 MaNGA; parameters of 668 galaxies (Sanchez-Menguiano+, 2020)
Local and Global Gas Metallicity versus Stellar Age Relation in MaNGA Galaxies.
Sanchez-Menguiano L., Almeida J.S., Munoz-Tunon C., Sanchez S.F.
<Astrophys. J., 903, 52 (2020)>
=2020ApJ...903...52S 2020ApJ...903...52S
ADC_Keywords: Galaxies; Spectra, optical; Spectra, infrared; Abundances
Keywords: Galaxy abundances ; Galaxy formation ; Galaxy chemical
evolution ; Star formation
Abstract:
The search for new global scaling relations linking the physical
properties of galaxies has a fundamental interest. Furthermore, their
recovery from spatially resolved relations has been in the spotlight
of integral field spectroscopy (IFS). In this study, we investigate
the existence of global and local relations between stellar age (Age*)
and gas-phase metallicity (Zg). To this aim, we analyze IFS data for a
sample of 736 star-forming disk galaxies from the MaNGA survey. We
report a positive correlation between the global Zg and D(4000) (an
indicator of stellar age), with a slope that decreases with increasing
galaxy mass. Locally, a similar trend is found when analyzing the Zg
and D(4000) of the star-forming regions, as well as the residuals
resulting from removing the radial gradients of both parameters. The
local laws have systematically smaller slopes than the global one. We
ascribe this difference to random errors that cause the true slope of
the Age*-Zg relation to be systematically underestimated when
performing a least-squares fitting. The explored relation is
intimately linked with the already known relation between gas
metallicity and star formation rate at fixed mass, both presenting a
common physical origin.
Description:
Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) is an
ongoing part of the fourth-generation Sloan Digital Sky Survey
(SDSS-IV). The data were collected using the BOSS spectrographs
mounted on the Sloan 2.5m telescope at Apache Point Observatory. The
field of view (FoV) of the instrument varies from 125 to 325 in
diameter for the five different hexagonal configurations displayed by
the 17 simultaneous bundles of fibers. The covered wavelength range
spans 3600-10300Å, with a nominal resolution of R∼2100 at 6000Å.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 53 668 Global and local parameters of the individual
galaxies
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See also:
J/A+A/559/A114 : Updated O3N2 and N2 abundance indicators (Marino+, 2013)
J/A+A/561/A33 : SDSS star-forming galaxies multi-wave study (Izotov+, 2014)
J/AJ/149/79 : Spectroscopy of 299 galaxies NewHa survey (de los Reyes+, 2015)
J/A+A/581/A103 : CALIFA survey across the Hubble sequence (Gonzalez+, 2015)
J/A+A/587/A70 : CALIFA face-on spiral galaxies O (Sanchez-Menguiano+, 2016)
J/A+A/604/A4 : CALIFA galaxies observational hints (Ruiz-Lara+, 2017)
J/MNRAS/469/2121 : Mass-metallicity relation revisited CALIFA (Sanchez+ 2017)
J/AJ/154/86 : MaNGA catalog, DR15 (Wake+, 2017)
J/ApJ/882/9 : SFR & gas-phase metallicity MaNGA gal. (Sanchez-Menguiano+, 2019)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- ID Galaxy identifier (1)
13- 17 F5.2 [Msun] Mass [7.75/11.23] Galaxy mass
19- 22 F4.2 [-] Zg [8.2/8.59]? Gas-phase oxygen abundance
24- 27 F4.2 --- D4000 [0.96/1.72]? 4000Å-break index
29- 34 F6.3 --- D4000-Zgorig [-0.9/2.0]? Slope of original local
Age*-Zg relation
36- 40 F5.3 --- e_D4000-Zgorig [0.017/0.9]? Error in D4000-Zgorig
42- 47 F6.3 --- D4000-Zgres [-4.9/6.1]? Slope of residual local
Age*-Zg relation
49- 53 F5.3 --- e_D4000-Zgres [0.011/0.5]? Error in D4000-Zgres
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Note (1): Defined as the [plate]-[ifudesign] of the MaNGA observations.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 28-Jan-2022