J/ApJ/848/87 CALIFA SFRs. II. Bulges, bars & disks (Catalan-Torrecilla+, 2017)
Star formation in the local universe from the CALIFA sample.
II. Activation and quenching mechanisms in bulges, bars, and disks.
Catalan-Torrecilla C., Gil de Paz A., Castillo-Morales A., Mendez-Abreu J.,
Falcon-Barroso J., Bekeraite S., Costantin L., de Lorenzo-Caceres A.,
Florido E., Garcia-Benito R., Husemann B., Iglesias-Paramo J.,
Kennicutt R.C., Mast D., Pascual S., Ruiz-Lara T., Sanchez-Menguiano L.,
Sanchez S.F., Walcher C.J., Bland-Hawthorn J., Puertas S.D., Marino R.A.,
Masegosa J., Sanchez-Blazquez P.
<Astrophys. J., 848, 87 (2017)>
=2017ApJ...848...87C 2017ApJ...848...87C
ADC_Keywords: Galaxies, spectra ; Morphology ; Stars, masses ; Optical
Keywords: galaxies: evolution ; galaxies: spiral ; galaxies: star formation ;
galaxies: structure ; techniques: photometric ;
techniques: spectroscopic
Abstract:
We estimate the current extinction-corrected Hα star formation
rate (SFR) of the different morphological components that shape
galaxies (bulges, bars, and disks). We use a multicomponent
photometric decomposition based on Sloan Digital Sky Survey imaging to
Calar Alto Legacy Integral Field Area Integral Field Spectroscopy
(IFS) datacubes for a sample of 219 galaxies. This analysis reveals an
enhancement of the central SFR and specific SFR (sSFR = SFR/M*) in
barred galaxies. Along the main sequence, we find that more massive
galaxies in total have undergone efficient suppression (quenching) of
their star formation, in agreement with many studies. We discover that
more massive disks have had their star formation quenched as well. We
evaluate which mechanisms might be responsible for this quenching
process. The presence of type 2 AGNs plays a role at damping the sSFR
in bulges and less efficiently in disks. Also, the decrease in the
sSFR of the disk component becomes more noticeable for stellar masses
around 1010.5M☉; for bulges, it is already present at
∼109.5M☉. The analysis of the line- of-sight stellar velocity
dispersions (σ) for the bulge component and of the corresponding
Faber-Jackson relation shows that AGNs tend to have slightly higher
σ values than star-forming galaxies for the same mass. Finally,
the impact of environment is evaluated by means of the projected
galaxy density, Σ5. We find that the SFR of both bulges and
disks decreases in intermediate- to high-density environments. This
work reflects the potential of combining IFS data with 2D
multicomponent decompositions to shed light on the processes that
regulate the SFR.
Description:
The galaxies used in this work are part of the Calar Alto Legacy
Integral Field Area (CALIFA) survey (Sanchez+ 2012A&A...538A...8S 2012A&A...538A...8S ;
2016A&A...594A..36S 2016A&A...594A..36S).
Data were obtained with the Potsdam Multi-Aperture Spectrophotometer
mounted on the 3.5m telescope at the Calar Alto Observatory.
The observations span the whole optical wavelength range in two
overlapping setups (3745-7500Å at R∼850 and 3650-4840Å at R∼1650).
As a brief summary, galaxies have spectroscopic redshifts in the range
0.005<z<0.03 and angular isophotal diameter in the range 45"<D25<80"
in the Sloan Digital Sky Survey (SDSS) r band. The properties of the
CALIFA mother sample are fully described in Walcher+ (2014A&A...569A...1W 2014A&A...569A...1W).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 142 219 CALIFA sample
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See also:
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
J/MNRAS/371/703 : MILES library of empirical spectra (Sanchez-Blazquez+, 2006)
J/ApJS/173/185 : GALEX UV atlas of nearby galaxies (Gil de Paz+, 2007)
J/A+A/486/85 : ACO 496 low-luminosity early-type gal. (Chilingarian+, 2008)
J/AJ/136/773 : Structure of classical bulges & pseudobulges (Fisher+, 2008)
J/A+A/478/353 : Structural properties of disk galaxies (Mendez-Abreu+, 2008)
J/MNRAS/393/1531 : BUDDA structural properties of galaxies (Gadotti+, 2009)
J/MNRAS/404/1639 : MILES base models & new line index system (Vazdekis+, 2010)
J/A+A/533/A119 : GOODS-Herschel North and South catalogs (Elbaz+, 2011)
J/MNRAS/414/888 : ATLAS3D project. III. (Emsellem+, 2011)
J/A+A/576/A135 : CALIFA DR2 (Garcia-Benito+, 2015)
J/A+A/584/A87 : CALIFA sample SFR calibration (Catalan-Torrecilla+, 2015)
J/A+A/584/A88 : Barred & unbarred gal. N, O abundance ratio (Florido+, 2015)
J/MNRAS/446/3943 : galaxies 2D phot. decompositions in SDSS-DR7 (Meert+, 2015)
J/ApJS/219/4 : S4G pipeline 4: multi-component decompositions (Salo+, 2015)
J/A+A/591/A28 : 2 QSOs SINFONI K-band datacubes (Carniani+, 2016)
J/A+A/599/A71 : 209276 SDSS star-forming gal. aperture-free (Duarte+, 2017)
J/A+A/597/A48 : Stellar kinematics in CALIFA survey (Falcon-Barroso+, 2017)
J/A+A/598/A32 : 2D decomposition of CALIFA galaxies (Mendez-Abreu+, 2017)
J/A+A/604/A4 : CALIFA galaxies observational hints (Ruiz-Lara+, 2017)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- ID [2/935] CALIFA identifier
5- 17 A13 --- Name Name
19- 19 A1 --- NPS [n] Nuclear point source component (1)
21- 28 F8.5 10+10Msun M-bulge [0.0001/13.1]? Stellar mass of
the bulge (2)
30- 36 F7.5 10+10Msun e_M-bulge [0/2.5]? Uncertainty in M-bulge
38- 38 A1 --- f_M-bulge [t] Error flag (3)
40- 45 F6.4 10+10Msun M-bar [0.004/4.6]? Stellar mass of the bar (2)
47- 52 F6.4 10+10Msun e_M-bar [0/1]? Uncertainty in M-bar
54- 54 A1 --- f_M-bar [t] Error flag (3)
56- 60 F5.2 10+10Msun M-disk [0.1/13.7]? Stellar mass of the disk (2)
62- 65 F4.2 10+10Msun e_M-disk [0.01/3.4]? Uncertainty in M-disk
67- 67 A1 --- f_M-disk [t] Error flag (3)
69- 73 F5.3 Msun/yr SFR-bulge [0/5.1]? Extinction-corrected Hα
SFR, bulge (4)
75- 79 F5.3 Msun/yr e_SFR-bulge [0/0.4]? Uncertainty in SFR-bulge
81- 81 A1 --- f_SFR-bulge [t] Error flag (3)
83- 87 F5.3 Msun/yr SFR-bar [0/3]? Extinction-corrected Hα SFR,
bar (4)
89- 93 F5.3 Msun/yr e_SFR-bar [0/0.2]? Uncertainty in SFR-bar
95- 95 A1 --- f_SFR-bar [t] Error flag (3)
97-101 F5.3 Msun/yr SFR-disk [0/7.4]? Extinction-corrected Hα
SFR, disk (4)
103-107 F5.3 Msun/yr e_SFR-disk [0/0.5]? Uncertainty in SFR-disk
109-109 A1 --- f_SFR-disk [t] Error flag (3)
111-113 A3 --- TType Morphological type
115-119 F5.2 Mpc-2 Sigma5 [0.1/19.2]? Projected galaxy density
121-125 F5.2 Mpc-2 e_Sigma5 [0/12]? Uncertainty in Sigma5
127-129 A3 --- AGN Type-2 AGN candidate (5)
131-136 F6.2 km/s sigbulge [28.2/247]? Line-of-sight dispersion,
bulge component
138-142 F5.2 km/s e_sigbulge [0.3/26.7]? Uncertainty in σ-bulge
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Note (1):
n = These galaxies have a nuclear point source component instead
of a bulge component.
Note (2): Stellar masses have been derived as explained in Section 3.4.
Note (3): These quantities have errors that are smaller than the last digit of
the corresponding magnitude measured. Instead of adding more precision to
the quantities quoted in this column, and for the sake of clarity in the
formatting of the table, we have not included their errors here.
Note (4): The value provided for the SFR in the disk component has been
corrected by aperture effects.
Note (5): Type-2 AGN candidate using the BPT diagram to obtain the nuclear
activity classification.
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History:
From electronic version of the journal
References:
Catalan-Torrecilla+ Paper I. 2015A&A...584A..87C 2015A&A...584A..87C Cat. J/A+A/584/A87
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 11-Jun-2018