J/ApJS/233/22 xCOLD GASS catalog (Saintonge+, 2017)
xCOLD GASS: the complete IRAM 30 m legacy survey of molecular gas for
galaxy evolution studies.
Saintonge A., Catinella B., Tacconi L.J., Kauffmann G., Genzel R.,
Cortese L., Dave R., Fletcher T.J., Gracia-Carpio J., Kramer C.,
Heckman T.M., Janowiecki S., Lutz K., Rosario D., Schiminovich D.,
Schuster K., Wang J., Wuyts S., Borthakur S., Lamperti I.,
Roberts-Borsani G.W.
<Astrophys. J. Suppl. Ser., 233, 22 (2017)>
=2017ApJS..233...22S 2017ApJS..233...22S (SIMBAD/NED BibCode)
ADC_Keywords: Galaxy catalogs ; Radio lines ; Carbon monoxide ; Redshifts ;
Abundances
Keywords: galaxies: evolution - galaxies: ISM - galaxies: star formation -
ISM: general
Abstract:
We introduce xCOLD GASS, a legacy survey providing a census of
molecular gas in the local universe. Building on the original COLD
GASS survey, we present here the full sample of 532 galaxies with CO
(1-0) measurements from the IRAM 30m telescope. The sample is
mass-selected in the redshift interval 0.01<z<0.05 from the Sloan
Digital Sky Survey (SDSS) and therefore representative of the local
galaxy population with M*>109M☉. The CO (1-0) flux
measurements are complemented by observations of the CO (2-1) line
with both the IRAM 30 m and APEX telescopes, HI observations from
Arecibo, and photometry from SDSS, WISE, and GALEX. Combining the IRAM
and APEX data, we find that the ratio of CO (2-1) to CO (1-0)
luminosity for integrated measurements is r21=0.79± 0.03, with no
systematic variations across the sample. The CO (1-0) luminosity
function is constructed and best fit with a Schechter function with
parameters LCO* =(7.77±2.11)x109K.(km/s).pc2,
φ*=(9.84±5.41)x10-4Mpc-3, and α=-1.19±0.05. With
the sample now complete down to stellar masses of 109M☉, we
are able to extend our study of gas scaling relations and confirm that
both molecular gas fractions (fH2) and depletion timescale
(tdep(H2)) vary with specific star formation rate (or offset from
the star formation main sequence) much more strongly than they depend
on stellar mass. Comparing the xCOLD GASS results with outputs from
hydrodynamic and semianalytic models, we highlight the constraining
power of cold gas scaling relations on models of galaxy formation.
Description:
The xCOLD GASS sample was assembled over the course of two large
programs at the IRAM 30m telescope.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 669 532 Identifiers and basic properties, star formation
rates and IR luminosity, spectral information,
IRAM CO (1-0) and CO (2.1) measurements, and
APEX CO(2-1) observations (tables 1, 3, 6)
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See also:
J/MNRAS/476/875 : xGASS catalog (Catinella+, 2018)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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Identifiers and basic properties
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1- 6 I6 --- GASS [522/124028] GASS catalog ID
8- 26 A19 --- SDSS SDSS name (JHHMMSS.ss+DDMMSS.s)
28- 45 I18 --- ObjID ? SDSS ObjID
47- 64 I18 --- SpecObjID ? SDSS SpecObjID
66- 69 I4 --- Plate SDSS spectroscopic Plate ID
71- 75 I5 --- MJD SDSS spectroscopic MJD ID
77- 79 I3 --- Fiber SDSS spectroscopic Fiber ID
81- 89 F9.5 deg RAdeg SDSS right ascension (J2000)
91- 99 F9.5 deg DEdeg SDSS declination (J2000)
101-109 F9.7 --- zSDSS SDSS spectroscopic redshift
111-118 F8.4 Mpc LumDist Luminosity distance (Omegam=0.3,
OmegaL=0.7, H0=70km/s/Mpc)
120-128 F9.6 deg Incl ?=- Disc inclination
130-136 F7.5 mag NUV-r ?=- NUV-r colour index,
corrected for Galactic extinction
138-147 F10.4 kpc R50kpc ?=- SDSS r-band Petrosian radius R50
149-156 F8.5 [Msun] logMstar Stellar mass
158-164 F7.5 [Msun/kpc2] logMust ?=- Stellar mass surface density
(calculated as
log(mu*)=log(M*/(2*pi*r50_z^2)) )
166-172 F7.5 --- Cindx ?=- Concentration index
(ratio of r-band Petrosian R90 and R50)
174-181 F8.6 -- Weight [0/4] Statistical weight
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Star formation rates and IR luminosity
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183-191 F9.6 [Msun/yr] logSFR-MPAJHU SFR from SDSS MPA/JHU catalog
193-201 F9.6 [Msun/yr] logSFR-SED ?=- SFR from UV+optical SED fitting
203-211 F9.6 [Msun/yr] logSFR-BEST ?=- SFR from WISE + GALEX when
detected in both data sets else
from SED fitting (see Janowiecki
et al. 2017MNRAS.466.4795J 2017MNRAS.466.4795J)
213-221 F9.6 [Msun/yr] e_logSFR-BEST ?=- Error on logSFR-BEST
223 I1 --- Flag-IRAS [0/2] Detection flag in the
IRAS PSC, 1:yes, 2:no
225-233 F9.6 [Lsun] logLIR-IRAS ?=0 Total IR luminosity
235-242 F8.6 --- IRcol-IRAS ?=0 IRAS colour (F60/F100)
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Spectral information
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244-252 F9.6 [-] N2HA ?=- log(FLUXNII6583/FLUXHalpha6562)
(using fluxes from SDSS DR7)
254-262 F9.6 [-] O3HB ?=- log(FLUXOIII5006/FLUXHBeta4861)
(using fluxes from SDSS DR7)
264-265 I2 --- AGNClass BPT-based AGN classification (1)
267-274 F8.5 --- ZPP04-N2 ?=- 12+logO/H from N2Ha using
Pettini & Pagel (2004MNRAS.348L..59P 2004MNRAS.348L..59P)
276-282 F7.5 --- ZPP04-O3N2 ?=- 12+logO/H from N2Ha and O3Hb using
Pettini & Pagel (2004MNRAS.348L..59P 2004MNRAS.348L..59P)
284-290 F7.5 --- ZMZR 12+logO/H from MZR, Kewley & Ellison
(2008ApJ...681.1183K 2008ApJ...681.1183Kr),
PP04 calibration
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IRAM Observations
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292 I1 --- Flag-CO [1/2] CO(1-0) detection flag,
1:yes, 2:no
294-301 F8.5 --- XCO Constant Galactic CO-to-H2 conversion
factor except for galaxies suspected
of requiring the lower "merger" value
303-310 F8.5 --- XCO-A17 CO-to-H2 conversion function from
Accurso et al.
(2017, arXiv:1702.03888)
312-319 F8.6 --- e_XCO-A17 Error on XCO-A17
321-329 F9.6 K.km/s ICO ?=0 CO(1-0) line flux
331-338 F8.6 K.km/s e_ICO ?=0 Error on ICO
340-348 F9.6 K.km/s ICO-COR ?=0 CO(1-0) line flux,
aperture corrected
350-357 F8.6 K.km/s e_ICO-COR ?=0 Error on ICO_COR
358 A1 --- l_LCO Limit flag on LCO-COR
359-370 E12.6 K.km/s.pc-2 LCO CO(1-0) line luminosity (if Flag-CO=2,
then this is a 3sigma upper limit)
372-383 E12.6 K.km/s.pc-2 e_LCO ?=0 Error on LCO
384 A1 --- l_LCO-COR Limit flag on LCO-COR
385-396 E12.6 K.km/s.pc-2 LCO-COR CO(1-0) line luminosity, aperture
corrected (if Flag-CO=2,
then this is a 3sigma upper limit)
398-409 E12.6 K.km/s.pc-2 e_LCO-COR ?=0 Error on LCO-COR
411-420 F10.8 K rms-CO rms noise around the CO(1-0) line
in 20km/s-wide channels
422-431 F10.6 --- SN-CO ?=0 Integrated S/N of the CO(1-0) line
433-442 F10.6 km/s WCO ?=0 FWHM of the CO(1-0) line
444 I1 --- WCO-Flag [0/3] Quality flag for WCO,
1:high quality, 2: acceptable, 3: poor
446-453 F8.6 --- zCO ?=0 Redshift based on the velocity of
the CO(1-0) line
455-464 F10.6 km/s WCO-TFR ?=0 FWHM of the CO(1-0) for TFR work
from Tiley et al.
(2016MNRAS.461.3494T 2016MNRAS.461.3494T)
466-475 F10.6 km/s e_WCO-TFR ?=0 Error on WCO_TFR
477-485 F9.6 [Msun] logMH2 ?=0 Total molecular gas mass
487-494 F8.6 [Msun] e_logMH2 ?=0 Error on LOGMH2
496-503 F8.6 [Msun] limlogMH2 ?=0 3sigma upper limit for logMH2
(when Flag-CO=2)
505-513 F9.6 [-] LogMH2/M* Molecular gas mass fraction
515 I1 --- Flag-CO21 [0/2] CO(2-1) detection flag,
1:yes, 2:no, 0:not observed
517-525 F9.6 K.km/s ICO21 ?=0 CO(2-1) line flux
527-534 F8.6 K.km/s e_ICO21 ?=- Error on ICO21
535 A1 --- l_LCO21 Limit flag on LCO21
536-547 E12.6 K.km/s.pc-2 LCO21 ?=- CO(2-1) line luminosity
(if Flag-CO21=2,
then this is a 3sigma upper limit)
549-560 E12.6 K.km/s.pc-2 e_LCO21 ?=- Error on LCO21
562-571 F10.8 K rms-CO21 ?=0 rms noise around the CO(2-1) line
in 20km/s-wide channels
573-582 F10.6 --- SN-CO21 ?=0 Integrated S/N of the CO(2-1) line
584-593 F10.6 km/s WCO21 ?=0 FWHM of the CO(2-1) line
595 I1 --- WCO21-Flag [0/3] Quality flag for WCO21,
1:high quality, 2:acceptable, 3:poor
597-604 F8.6 --- zCO21 ?=0 Redshift based on the velocity of
the CO(2-1) line
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APEX CO(2-1) Observations
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606 I1 --- Flag-APEX [0/2] CO(2-1) detection flag,
1:yes, 2:no, 0:not observed
608-615 F8.6 K.km/s ICO-APEX ?=0 CO(2-1) line flux
617-628 E12.6 K.km/s.pc-2 LCO-APEX ?=0 CO(2-1) line luminosity
630-639 F10.8 K rms-APEX ?=0 rms noise around the CO(2-1) line
in 20km/s-wide channels
641-649 F9.6 --- SN-APEX ?=0 Integrated S/N of the CO(2-1) line
651-660 F10.6 km/s WCO-APEX ?=0 FWHM of the CO(2-1) line
662-669 F8.6 --- zCO-APEX ?=0 Redshift based on the velocity of
the CO(2-1) line
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Note (1): BPT-based AGN classification as follows:
-1 = undetermined
0 = inactive
1 = SFing
2 = Composite
3 = LINER
4 = Seyfert
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 19-Feb-2021