J/A+A/597/A51 Physical properties of Spitzer/IRS galaxies (Vika+, 2017)
The physical properties of Spitzer/IRS galaxies derived from their UV to 22 mum
spectral energy distribution.
Vika M., Ciesla L., Charmandaris V. Xilouris E.M., Lebouteiller V.
<Astron. Astrophys. 597, A51 (2017)>
=2017A&A...597A..51V 2017A&A...597A..51V (SIMBAD/NED BibCode)
ADC_Keywords: Galaxy catalogs ; Galaxies, photometry
Keywords: galaxies: photometry - galaxies: fundamental parameters - catalogs -
galaxies: star formation
Abstract:
We provide the basic integrated physical properties of all the
galaxies contained in the full Cornell Atlas of Spitzer/IRS Sources
(CASSIS) with available broad-band photometry from UV to 22 microns.
We have collected broad-band photometric measurements in 14
wavelengths from available public surveys in order to study the
spectral energy distribution (SED) of each galaxy in CASSIS, thus
constructing a final sample of 1146 galaxies in the redshift range
0<z<2.5.
The SEDs are modelled with the CIGALE code which relies on the energy
balance between the absorbed stellar and the dust emission while
taking into account the possible contribution due to the presence of
an active galactic nucleus (AGN). We split the galaxies in three
groups, a low-redshift (z<0.1), a mid-redshift (0.1=<z<0.5) and
a high-redshift (z≥0.5) sub-sample and find that the vast majority
of the Spitzer/IRS galaxies are star-forming and lie on or above the
star-forming main sequence of the corresponding redshift. Moreover,
the emission of Spitzer/IRS galaxies with z<0.1 is mostly dominated
by star-formation, galaxies in the mid-redshift bin are a mixture of
star forming and AGN galaxies, while half of the galaxies with z≥0.5
show moderate or high AGN activity. Additionally, using rest-frame
NUV-r colour, Sersic indices, optical [OIII] and [NII] emission lines
we explore the nature of these galaxies by investigating further their
structure as well as their star-formation and AGN activity. Using a
colour magnitude diagram we confirm that 97% of the galaxies with
redshift smaller than 0.5 have experienced a recent star-formation
episode. For a sub-sample of galaxies with available structural
information and redshift smaller than 0.3 we find that early-type
galaxies are placed below the main sequence, while late-type galaxies
are found on the main- sequence as expected. Finally, for all the
galaxies with redshift smaller than 0.5 and available optical spectral
line measurements we compare the ability of CIGALE to detect the
presence of an AGN in contrast to the optical spectra classification.
We find that galaxies with high AGN luminosity, as calculated by
CIGALE, are most likely to be classified as composite or AGNs by
optical spectral lines.
Description:
Physical parameters for 1146 galaxies that also have IRS/Spitzer
spectra are presented. The physical parameters were derived with the
use of the CIGALE code.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
cassis.dat 220 1145 IDs, physical parameters for 1146 of the
CASSIS sample
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Byte-by-byte Description of file: cassis.dat
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Bytes Format Units Label Explanations
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1- 8 I8 --- AORkey Spitzer/IRS identification key
10- 16 F7.3 deg RAdeg Right ascension of the Spitzer/IRS
source (J2000)
18- 24 F7.3 deg DEdeg Declination of the Spitzer/IRS source (J2000)
26- 29 F4.2 --- z Redshift from NED
31- 51 F21.6 Msun M* Stellar mass as measured by CIGALE
53- 73 F21.6 Msun e_M* Uncertainty of stellar mass as measured by
CIGALE
75- 85 F11.5 Msun/yr SFR Star-formation rate as measured by CIGALE
87- 97 F11.5 Msun/yr e_SFR Uncertainty of star- formation rate as
measured by CIGALE
99-103 I5 Myr Age Stellar age as measured by CIGALE
105-108 I4 Myr e_Age Uncertainty of stellar age as measured by
CIGALE
110-115 F6.4 --- AE(B-V) Attenuation of young stellar populations as
measured by CIGALE
117-122 F6.4 --- e_AE(B-V) Uncertainty of E(B-V) attenuation of young
stellar populations as measured by CIGALE
124-128 F5.3 --- fAGN Contribution of an AGN to the total IR
luminosity as measured by CIGALE
130-134 F5.3 --- e_fAGN Uncertainty of contribution of an AGN to the
total IR luminosity as measured by CIGALE
136-143 E8.2 W LAGN AGN luminosity as measured by CIGALE
145-152 E8.2 W e_LAGN Uncertainty of AGN luminosity as measured by
CIGALE
154-161 E8.2 W Ldust Dust luminosity as measured by CIGALE
163-170 E8.2 W e_Ldust Uncertainty of dust luminosity as measured by
CIGALE
172-177 F6.4 mag AFUV The attenuation in the FUV as measured by
CIGALE
179-183 F5.3 --- chi2r Minimised chi square of the fit
185-214 A30 --- NEDname Galaxy name from NED
216 I1 --- A [0/4] Classification (1)
218 I1 --- B [0/3] Classification (2)
220 I1 --- f [0/1] Flag where 1 indicates saturation
flag in SDSS data
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Note (1): Classification a as follows:
1 = late-galaxy
2 = blue & high-n galaxy
3 = red & low-n galaxy
4 = early-type galaxy
0 = not available classification
Note (2): Classificaiton B as follows:
1 = AGN
2 = composite
3 = star-forming galaxy
0 = not available classification
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Acknowledgements:
Marina Vika, mvika (at) astro.noa.gr
(End) Marina Vika [NOA, Greece], Patricia Vannier [CDS] 18-Oct-2016