MultiDark-Galaxies: data release and first results
We present the public release of the MultiDark-Galaxies: three distinct galaxy catalogues derived from one of the Planck cosmology MultiDark simulations (i.e. MDPL2, with a volume of (1 Gpc/\(h\))\(^{3}\) and mass resolution of \(1.5 \times 10^{9} M_{\odot}/h\)) by applying the semi-analytic models...
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| creator | Knebe, Alexander Stoppacher, Doris Prada, Francisco Behrens, Christoph Benson, Andrew Cora, Sofia A Croton, Darren J Padilla, Nelson D Ruiz, Andrés N Sinha, Manodeep Stevens, Adam R H Vega-Martínez, Cristian A Behroozi, Peter Gonzalez-Perez, Violeta Gottlöber, Stefan Klypin, Anatoly A Yepes, Gustavo Enke, Harry Libeskind, Noam I Riebe, Kristin Steinmetz, Matthias |
| description | We present the public release of the MultiDark-Galaxies: three distinct galaxy catalogues derived from one of the Planck cosmology MultiDark simulations (i.e. MDPL2, with a volume of (1 Gpc/\(h\))\(^{3}\) and mass resolution of \(1.5 \times 10^{9} M_{\odot}/h\)) by applying the semi-analytic models GALACTICUS, SAG, and SAGE to it. We compare the three models and their conformity with observational data for a selection of fundamental properties of galaxies like stellar mass function, star formation rate, cold gas fractions, and metallicities - noting that they sometimes perform differently reflecting model designs and calibrations. We have further selected galaxy subsamples of the catalogues by number densities in stellar mass, cold gas mass, and star formation rate in order to study the clustering statistics of galaxies. We show that despite different treatment of orphan galaxies, i.e. galaxies that lost their dark-matter host halo due to the finite mass resolution of the N-body simulation or tidal stripping, the clustering signal is comparable, and reproduces the observations in all three models - in particular when selecting samples based upon stellar mass. Our catalogues provide a powerful tool to study galaxy formation within a volume comparable to those probed by on-going and future photometric and redshift surveys. All model data consisting of a range of galaxy properties - including broad-band SDSS magnitudes - are publicly available. |
| doi_str_mv | 10.48550/arxiv.1710.08150 |
| format | Article |
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We compare the three models and their conformity with observational data for a selection of fundamental properties of galaxies like stellar mass function, star formation rate, cold gas fractions, and metallicities - noting that they sometimes perform differently reflecting model designs and calibrations. We have further selected galaxy subsamples of the catalogues by number densities in stellar mass, cold gas mass, and star formation rate in order to study the clustering statistics of galaxies. We show that despite different treatment of orphan galaxies, i.e. galaxies that lost their dark-matter host halo due to the finite mass resolution of the N-body simulation or tidal stripping, the clustering signal is comparable, and reproduces the observations in all three models - in particular when selecting samples based upon stellar mass. Our catalogues provide a powerful tool to study galaxy formation within a volume comparable to those probed by on-going and future photometric and redshift surveys. All model data consisting of a range of galaxy properties - including broad-band SDSS magnitudes - are publicly available.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.1710.08150</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Astronomical catalogs ; Astronomical models ; Clustering ; Cold gas ; Computer simulation ; Cosmology ; Galactic evolution ; Galaxies ; Photometry ; Physics - Astrophysics of Galaxies ; Physics - Cosmology and Nongalactic Astrophysics ; Red shift ; Star & galaxy formation ; Star formation rate ; Stars & galaxies ; Statistical methods ; Stellar mass</subject><ispartof>arXiv.org, 2017-10</ispartof><rights>2017. 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| subjects | Astronomical catalogs Astronomical models Clustering Cold gas Computer simulation Cosmology Galactic evolution Galaxies Photometry Physics - Astrophysics of Galaxies Physics - Cosmology and Nongalactic Astrophysics Red shift Star & galaxy formation Star formation rate Stars & galaxies Statistical methods Stellar mass |
| title | MultiDark-Galaxies: data release and first results |
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