J/A+A/550/A115 Oxygen abundances and properties of galaxies (Hughes+, 2013)
The role of cold gas and environment on the stellar mass - metallicity relation
of nearby galaxies.
Hughes T.M., Cortese L., Boselli A., Gavazzi G., Davies J.I.
<Astron. Astrophys. 550, A115 (2013)>
=2013A&A...550A.115H 2013A&A...550A.115H
ADC_Keywords: Galaxies, nearby ; Abundances ; Combined data
Keywords: galaxies: evolution - galaxies: spiral - cosmology: observations
Abstract:
We investigate the relationship between stellar mass, metallicity and
gas content for a magnitude- and volume-limited sample of 260 nearby
late-type galaxies in different environments, from isolated galaxies
to Virgo cluster members. We derive oxygen abundance estimates using
new integrated, drift scan optical spectroscopy and the base
metallicity calibrations of Kewley & Ellison (2008ApJ...681.1183K 2008ApJ...681.1183K).
Combining these measurements with ultraviolet to near- infrared
photometry and HI 21cm line observations, we examine the relations
between stellar mass, metallicity, gas mass fraction and star
formation rate. We find that, at fixed stellar mass, galaxies with
lower gas fractions typically also possess higher oxygen abundances.
We also observe a relationship between gas fraction and metal content,
whereby gas-poor galaxies are typically more metal-rich, and
demonstrate that the removal of gas from the outskirts of spirals may
increase the observed average metallicity by ∼0.1dex. Although some
cluster galaxies are gas-deficient objects, statistically the
stellar-mass metallicity relation is nearly invariant to the
environment, in agreement with recent studies. These results indicate
that internal evolutionary processes, rather than environmental
effects, play a key role in shaping the stellar mass - metallicity
relation. In addition, we present metallicity estimates based on
observations of 478 nearby galaxies.
Description:
Gas-phase oxygen abundances are estimated from measurements of
emission line fluxes from new optical drift-scan spectroscopy (Boselli
et al 2013, A&A in press) using five different calibrations from the
literature. Each abundance obtained from the five calibrations is
converted into the Pettini & Pagel (2004MNRAS.348L..59P 2004MNRAS.348L..59P, PP04) O3N2
base metallicity using conversions presented in Kewley & Ellison
(2008ApJ...681.1183K 2008ApJ...681.1183K). Final gas-phase oxygen abundances are derived
from the mean of all the applicable calibrations converted into the
PP04 O3N2 base metallicity (i.e. upto five metallicity estimates
available per galaxy) and weighted by the errors associated with each
calibration method. The overall error is calculated from the
error-weighted normalised mean metallicity to give the standard
weighted error. Oxygen abundances are calculated for 272 galaxies from
478 observations and presented in Table 2 (table2.dat). Additional
physical parameters derived from combined multi-wavelength
observations for 169 galaxies in the Herschel Reference Survey are
provided in Table 3 (table3.dat).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 108 478 Gas-phase oxygen abundance measurements based
on optical spectroscopy for 478 galaxies
table3.dat 42 169 Derived physical properties for 169 galaxies
refs.dat 61 38 References
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See also:
J/PASP/122/261 : Herschel Reference Survey Sample (Boselli+, 2010)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- Name Galaxy name
13- 15 I3 --- HRS ? Herschel Reference Survey number (Boselli
et al. 2010, Cat. J/PASP/122/261)
17- 18 I2 h RAh Right ascension (J2000.0)
20- 21 I2 min RAm Right ascension (J2000.0)
23- 26 F4.1 s RAs Right ascension (J2000.0)
28 A1 --- DE- Declination sign (J2000.0)
29- 30 I2 deg DEd Declination (J2000.0)
32- 33 I2 arcmin DEm Declination (J2000.0)
35- 36 I2 arcsec DEs Declination (J2000.0)
38- 41 F4.2 --- CHb ? Balmer decrement, including contributions
from internal and Galactic extinction
44 A1 --- OII [.<] OII flag, '.'/'<' for detected/undetected
46- 49 F4.2 [-] M91 ? Global oxygen abundance following
McGaugh, 1991ApJ...380..140M 1991ApJ...380..140M (1)
51- 54 F4.2 [-] Z94 ? Global oxygen abundance following
Zaritsky et al., 1994ApJ...420...87Z 1994ApJ...420...87Z (1)
56- 59 F4.2 [-] KD02 ? Global oxygen abundance following
Kewley & Dopita, 2002ApJS..142...35K 2002ApJS..142...35K (1)
61- 64 F4.2 [-] O3N2 ? Global oxygen abundance following
Pettini & Pagel, 2004MNRAS.348L..59P 2004MNRAS.348L..59P (1)
66- 69 F4.2 [-] N2 ? Global oxygen abundance following
Pettini & Pagel, 2004MNRAS.348L..59P 2004MNRAS.348L..59P (1)
71- 74 F4.2 [-] M91c ? Global oxygen abundance following
McGaugh, 1991ApJ...380..140M 1991ApJ...380..140M (1) (2)
76- 79 F4.2 [-] Z94c ? Global oxygen abundance following
Zaritsky et al., 1994ApJ...420...87Z 1994ApJ...420...87Z (1) (2)
81- 84 F4.2 [-] KD02c ? Global oxygen abundance following
Kewley & Dopita, 2002ApJS..142...35K 2002ApJS..142...35K (1) (2)
86- 89 F4.2 [-] O3N2c ? Global oxygen abundance following
Pettini & Pagel, 2004MNRAS.348L..59P 2004MNRAS.348L..59P (1)
91- 94 F4.2 [-] N2c ? Global oxygen abundance following
Pettini & Pagel, 2004MNRAS.348L..59P 2004MNRAS.348L..59P (1) (2)
96- 99 F4.2 [-] avZ ? Mean oxygen abundance, 12+log(O/H)
101-104 F4.2 [-] e_avZ ? Overall error, 12+log(O/H)
106 I1 --- Nc ? Number of calibrations averaged
108 I1 --- Ref Literature reference for spectroscopy (3)
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Note (1): in units of 12+log(O/H)
Note (2): converted to PP04 O3N2 base metallicity (Pettini & Pagel
2004MNRAS.348L..59P 2004MNRAS.348L..59P) using conversions presented in Kewley & Ellison
2008ApJ...681.1183K 2008ApJ...681.1183K.
Note (3): Reference for spectroscopy as follows:
1 = Boselli et al., 2012, submitted to A&A
2 = Gavazzi et al., 2004, Cat. J/A+A/417/499
3 = Moustakas et al., 2010, Cat. J/ApJS/190/233
4 = Moustakas et al., 2006, Cat. J/ApJS/164/81
5 = Jansen et al., 2000, Cat. J/ApJS/126/331
6 = Kennicutt et al., 1992ApJ...388..310K 1992ApJ...388..310K
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- HRS Herschel Reference Survey number
(Boselli et al., 2010, Cat. J/PASP/122/261)
5- 10 F6.3 [Msun] logM* Logarithm of stellar mass
11- 15 F5.2 [Msun] logMHI ? Logarithm of atomic hydrogen gas mass
17- 18 I2 --- Ref ? Literature reference for HI 21 cm data,
in refs.dat file
20- 24 F5.2 [Msun] DEF(HI) ? HI deficiency parameter (1)
26- 29 F4.2 [-] avZ Oxygen abundance derived in this work,
in units of 12+log(O/H)
31- 34 F4.2 [-] e_avZ Error on the oxygen abundance,
in units of 12+log(O/H)
36- 40 F5.2 Msun/yr SFR ? Star formation rate in solar masses per year
calculated from GALEX NUV data following
Iglesias-Paramo, 2006ApJS..164...38I 2006ApJS..164...38I
42 A1 --- ENV [FV] Galaxy environment: Field (F) or
Virgo cluster member (V)
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Note (1): the HI deficiency parameter DEF(HI), defined by Haynes et al.
1984ARA&A..22..445H 1984ARA&A..22..445H, is the difference, in logarithmic units, between
the observed HI mass and the value expected from an isolated galaxy
with the same morphological type T and optical linear diameter D:
DEF(HI) = log.MHI(T,D)-log MHI
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Ref Reference code
4- 22 A19 --- BibCode BibCode
24- 46 A23 --- Aut Author's name
50- 61 A12 --- Com Comments
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Acknowledgements:
Thomas M. Hughes, tmhughes(at)pku.edu.cn
(End) Thomas M. Hughes [KIAA-PKU, China], Patricia Vannier [CDS] 14-Jan-2013