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Predictions for the CO emission of galaxies from a coupled simulation of galaxy formation and photon-dominated regions. / Lagos, Claudia del P.; Bayet, Estelle; Baugh, Carlton M.; Lacey, Cedric G.; Bell, Tom A.; Fanidakis, Nikolaos; Geach, James E.

In: Monthly Notices of the Royal Astronomical Society, Vol. 426, No. 3, 11.2012, p. 2142-2165.

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Lagos, Claudia del P. ; Bayet, Estelle ; Baugh, Carlton M. ; Lacey, Cedric G. ; Bell, Tom A. ; Fanidakis, Nikolaos ; Geach, James E. / Predictions for the CO emission of galaxies from a coupled simulation of galaxy formation and photon-dominated regions. In: Monthly Notices of the Royal Astronomical Society. 2012 ; Vol. 426, No. 3. pp. 2142-2165.

Bibtex

@article{2039d81819904f6ea68b960a368f2918,
title = "Predictions for the CO emission of galaxies from a coupled simulation of galaxy formation and photon-dominated regions",
abstract = "We combine the galaxy formation model galform with the photon-dominated region code ucl-pdr to study the emission from the rotational transitions of 12CO (CO) in galaxies from z = 0 to z = 6 in the ?cold dark matter framework. galform is used to predict the molecular (H2) and atomic hydrogen (H?i) gas contents of galaxies using the pressure-based empirical star formation relation of Blitz & Rosolowsky. From the predicted H2 mass and the conditions in the interstellar medium, we estimate the CO emission in the rotational transitions 10 to 109 by applying the ucl-pdr model to each galaxy. We find that deviations from the Milky Way COH2 conversion factor come mainly from variations in metallicity, and in the average gas and star formation rate surface densities. In the local universe, the model predicts a CO(10) luminosity function (LF), CO-to-total infrared (IR) luminosity ratios for multiple CO lines and a CO spectral line energy distribution (SLED) which are in good agreement with observations of luminous and ultra-luminous IR galaxies. At high redshifts, the predicted CO SLED of the brightest IR galaxies reproduces the shape and normalization of the observed CO SLED. The model predicts little evolution in the CO-to-IR luminosity ratio for different CO transitions, in good agreement with observations up to z similar to 5. We use this new hybrid model to explore the potential of using colour-selected samples of high-redshift star-forming galaxies to characterize the evolution of the cold gas mass in galaxies through observations with the Atacama Large Millimetre Array.",
keywords = "SUBMILLIMETER GALAXIES, ISM: lines and bands, galaxies: ISM, MOLECULAR LINE-INTENSITIES, ACTIVE GALACTIC NUCLEI, QUASI-STELLAR OBJECTS, ULTRA-DEEP-FIELD, galaxies: evolution, stars: formation, FORMING GALAXIES, galaxies: formation, STAR-FORMATION LAW, IRAM LEGACY SURVEY, DARK-MATTER MODEL, SMALL-MAGELLANIC-CLOUD",
author = "Lagos, {Claudia del P.} and Estelle Bayet and Baugh, {Carlton M.} and Lacey, {Cedric G.} and Bell, {Tom A.} and Nikolaos Fanidakis and Geach, {James E.}",
year = "2012",
month = "11",
doi = "10.1111/j.1365-2966.2012.21905.x",
language = "English",
volume = "426",
pages = "2142--2165",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "3",

}

RIS

TY - JOUR

T1 - Predictions for the CO emission of galaxies from a coupled simulation of galaxy formation and photon-dominated regions

AU - Lagos, Claudia del P.

AU - Bayet, Estelle

AU - Baugh, Carlton M.

AU - Lacey, Cedric G.

AU - Bell, Tom A.

AU - Fanidakis, Nikolaos

AU - Geach, James E.

PY - 2012/11

Y1 - 2012/11

N2 - We combine the galaxy formation model galform with the photon-dominated region code ucl-pdr to study the emission from the rotational transitions of 12CO (CO) in galaxies from z = 0 to z = 6 in the ?cold dark matter framework. galform is used to predict the molecular (H2) and atomic hydrogen (H?i) gas contents of galaxies using the pressure-based empirical star formation relation of Blitz & Rosolowsky. From the predicted H2 mass and the conditions in the interstellar medium, we estimate the CO emission in the rotational transitions 10 to 109 by applying the ucl-pdr model to each galaxy. We find that deviations from the Milky Way COH2 conversion factor come mainly from variations in metallicity, and in the average gas and star formation rate surface densities. In the local universe, the model predicts a CO(10) luminosity function (LF), CO-to-total infrared (IR) luminosity ratios for multiple CO lines and a CO spectral line energy distribution (SLED) which are in good agreement with observations of luminous and ultra-luminous IR galaxies. At high redshifts, the predicted CO SLED of the brightest IR galaxies reproduces the shape and normalization of the observed CO SLED. The model predicts little evolution in the CO-to-IR luminosity ratio for different CO transitions, in good agreement with observations up to z similar to 5. We use this new hybrid model to explore the potential of using colour-selected samples of high-redshift star-forming galaxies to characterize the evolution of the cold gas mass in galaxies through observations with the Atacama Large Millimetre Array.

AB - We combine the galaxy formation model galform with the photon-dominated region code ucl-pdr to study the emission from the rotational transitions of 12CO (CO) in galaxies from z = 0 to z = 6 in the ?cold dark matter framework. galform is used to predict the molecular (H2) and atomic hydrogen (H?i) gas contents of galaxies using the pressure-based empirical star formation relation of Blitz & Rosolowsky. From the predicted H2 mass and the conditions in the interstellar medium, we estimate the CO emission in the rotational transitions 10 to 109 by applying the ucl-pdr model to each galaxy. We find that deviations from the Milky Way COH2 conversion factor come mainly from variations in metallicity, and in the average gas and star formation rate surface densities. In the local universe, the model predicts a CO(10) luminosity function (LF), CO-to-total infrared (IR) luminosity ratios for multiple CO lines and a CO spectral line energy distribution (SLED) which are in good agreement with observations of luminous and ultra-luminous IR galaxies. At high redshifts, the predicted CO SLED of the brightest IR galaxies reproduces the shape and normalization of the observed CO SLED. The model predicts little evolution in the CO-to-IR luminosity ratio for different CO transitions, in good agreement with observations up to z similar to 5. We use this new hybrid model to explore the potential of using colour-selected samples of high-redshift star-forming galaxies to characterize the evolution of the cold gas mass in galaxies through observations with the Atacama Large Millimetre Array.

KW - SUBMILLIMETER GALAXIES

KW - ISM: lines and bands

KW - galaxies: ISM

KW - MOLECULAR LINE-INTENSITIES

KW - ACTIVE GALACTIC NUCLEI

KW - QUASI-STELLAR OBJECTS

KW - ULTRA-DEEP-FIELD

KW - galaxies: evolution

KW - stars: formation

KW - FORMING GALAXIES

KW - galaxies: formation

KW - STAR-FORMATION LAW

KW - IRAM LEGACY SURVEY

KW - DARK-MATTER MODEL

KW - SMALL-MAGELLANIC-CLOUD

U2 - 10.1111/j.1365-2966.2012.21905.x

DO - 10.1111/j.1365-2966.2012.21905.x

M3 - Literature review

VL - 426

SP - 2142

EP - 2165

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 3

ER -