XCOLD GASS: The Complete IRAM 30 m Legacy Survey of Molecular Gas for Galaxy Evolution Studies

Amélie Saintonge, Barbara Catinella, Linda J. Tacconi, Guinevere Kauffmann, Reinhard Genzel, Luca Cortese, Romeel Davé, Thomas J. Fletcher, Javier Graciá-Carpio, Carsten Kramer, Timothy M. Heckman, Steven Janowiecki, Katharina Lutz, David Rosario, David Schiminovich, Karl Schuster, Jing Wang, Stijn Wuyts, Sanchayeeta Borthakur, Isabella Lamperti & 1 others Guido W. Roberts-Borsani

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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 30 m 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 > 109 M. 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, H I 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) × 109 K km s-1 pc2, φ = (9.84 ± 5.41) × 10-4 Mpc-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.

LanguageEnglish
Article number22
JournalAstrophysical Journal, Supplement Series
Volume233
Issue number2
DOIs
StatePublished - 1 Dec 2017

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molecular gases
galaxies
stellar mass
gas
luminosity
telescopes
Wide-field Infrared Survey Explorer
scaling
census
cold gas
galactic evolution
flux measurement
star formation rate
photometry
star formation
depletion
universe
hydrodynamics
timescale
intervals

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Saintonge, Amélie ; Catinella, Barbara ; Tacconi, Linda J. ; Kauffmann, Guinevere ; Genzel, Reinhard ; Cortese, Luca ; Davé, Romeel ; Fletcher, Thomas J. ; Graciá-Carpio, Javier ; Kramer, Carsten ; Heckman, Timothy M. ; Janowiecki, Steven ; Lutz, Katharina ; Rosario, David ; Schiminovich, David ; Schuster, Karl ; Wang, Jing ; Wuyts, Stijn ; Borthakur, Sanchayeeta ; Lamperti, Isabella ; Roberts-Borsani, Guido W./ XCOLD GASS : The Complete IRAM 30 m Legacy Survey of Molecular Gas for Galaxy Evolution Studies. In: Astrophysical Journal, Supplement Series. 2017 ; Vol. 233, No. 2.
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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 30 m 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∗ > 109 M⊙. 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, H I 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) × 109 K km s-1 pc2, φ∗ = (9.84 ± 5.41) × 10-4 Mpc-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.",
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author = "Am{\'e}lie Saintonge and Barbara Catinella and Tacconi, {Linda J.} and Guinevere Kauffmann and Reinhard Genzel and Luca Cortese and Romeel Dav{\'e} and Fletcher, {Thomas J.} and Javier Graci{\'a}-Carpio and Carsten Kramer and Heckman, {Timothy M.} and Steven Janowiecki and Katharina Lutz and David Rosario and David Schiminovich and Karl Schuster and Jing Wang and Stijn Wuyts and Sanchayeeta Borthakur and Isabella Lamperti and Roberts-Borsani, {Guido W.}",
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Saintonge, A, Catinella, B, Tacconi, LJ, Kauffmann, G, Genzel, R, Cortese, L, Davé, R, Fletcher, TJ, Graciá-Carpio, J, Kramer, C, Heckman, TM, Janowiecki, S, Lutz, K, Rosario, D, Schiminovich, D, Schuster, K, Wang, J, Wuyts, S, Borthakur, S, Lamperti, I & Roberts-Borsani, GW 2017, 'XCOLD GASS: The Complete IRAM 30 m Legacy Survey of Molecular Gas for Galaxy Evolution Studies' Astrophysical Journal, Supplement Series, vol 233, no. 2, 22. DOI: 10.3847/1538-4365/aa97e0

XCOLD GASS : The Complete IRAM 30 m Legacy Survey of Molecular Gas for Galaxy Evolution Studies. / Saintonge, Amélie; Catinella, Barbara; Tacconi, Linda J.; Kauffmann, Guinevere; Genzel, Reinhard; Cortese, Luca; Davé, Romeel; Fletcher, Thomas J.; Graciá-Carpio, Javier; Kramer, Carsten; Heckman, Timothy M.; Janowiecki, Steven; Lutz, Katharina; Rosario, David; Schiminovich, David; Schuster, Karl; Wang, Jing; Wuyts, Stijn; Borthakur, Sanchayeeta; Lamperti, Isabella; Roberts-Borsani, Guido W.

In: Astrophysical Journal, Supplement Series, Vol. 233, No. 2, 22, 01.12.2017.

Research output: Contribution to journalArticle

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T2 - The Astrophysical Journal Supplement Series

AU - Saintonge,Amélie

AU - Catinella,Barbara

AU - Tacconi,Linda J.

AU - Kauffmann,Guinevere

AU - Genzel,Reinhard

AU - Cortese,Luca

AU - Davé,Romeel

AU - Fletcher,Thomas J.

AU - Graciá-Carpio,Javier

AU - Kramer,Carsten

AU - Heckman,Timothy M.

AU - Janowiecki,Steven

AU - Lutz,Katharina

AU - Rosario,David

AU - Schiminovich,David

AU - Schuster,Karl

AU - Wang,Jing

AU - Wuyts,Stijn

AU - Borthakur,Sanchayeeta

AU - Lamperti,Isabella

AU - Roberts-Borsani,Guido W.

PY - 2017/12/1

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N2 - 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 30 m 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∗ > 109 M⊙. 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, H I 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) × 109 K km s-1 pc2, φ∗ = (9.84 ± 5.41) × 10-4 Mpc-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.

AB - 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 30 m 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∗ > 109 M⊙. 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, H I 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) × 109 K km s-1 pc2, φ∗ = (9.84 ± 5.41) × 10-4 Mpc-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.

KW - galaxies: evolution

KW - galaxies: ISM

KW - galaxies: star formation

KW - ISM: general

UR - http://www.scopus.com/inward/record.url?scp=85039860877&partnerID=8YFLogxK

U2 - 10.3847/1538-4365/aa97e0

DO - 10.3847/1538-4365/aa97e0

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JO - The Astrophysical Journal Supplement Series

JF - The Astrophysical Journal Supplement Series

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