From dwarf spheroidals to cD galaxies: simulating the galaxy population in a ΛCDM cosmology
Qi Guo,Simon D. M. White,Michael Boylan-Kolchin,Gabriella De Lucia,Guinevere Kauffmann,Gerard Lemson,Cheng Li,Volker Springel,Simone M. Weinmann +8 more
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TLDR
In this paper, a semi-analytic galaxy formation model was proposed and applied to the stored halo/subhalo merger trees of the Millennium and Millennium-II simulations, allowing explicit testing of resolution effects on predicted galaxy properties.Abstract:
We have updated and extended our semi-analytic galaxy formation modelling capabilities and applied them simultaneously to the stored halo/subhalo merger trees of the Millennium and Millennium-II simulations. These differ by a factor of 125 in mass resolution, allowing explicit testing of resolution effects on predicted galaxy properties. We have revised the treatments of the transition between the rapid infall and cooling flow regimes of gas accretion, of the sizes of bulges and of gaseous and stellar disks, of supernova feedback, of the transition between central and satellite status as galaxies fall into larger systems, and of gas and star stripping once they become satellites. Plausible values of efficiency and scaling parameters yield an excellent fit not only to the observed abundance of low-redshift galaxies over 5 orders of magnitude in stellar mass and 9 magnitudes in luminosity, but also to the observed abundance of Milky Way satellites. This suggests that reionisation effects may not be needed to solve the “missing satellite” problem except, perhaps, for the faintest objects. The same model matches the observed large-scale clustering of galaxies as a function of stellar mass and colour. The fit remains excellent down to � 30 kpc for massive galaxies. For M∗ < 6×10 10 M⊙, however, the model overpredicts clustering at scales below � 1 Mpc, suggesting that the assumed fluctuation amplitude, σ8 = 0.9, is too high. The observed difference in clustering between active and passive galaxies is matched quite well for all masses. Galaxy distributions within rich clusters agree between the simulations and match those observed, but only if galaxies without dark matter subhalos (so-called orphans) are included. Even at MS-II resolution, schemes which assign galaxies only to resolved dark matter subhalos cannot match observed clusters. Our model predicts a larger passive fraction among low-mass galaxies than is observed, as well as an overabundance of � 10 10 M⊙ galaxies beyond z � 0.6. (The abundance of � 10 11 M⊙ galaxies is matched out to z � 3.) These discrepancies appear to reflect deficiencies in the way star-formation rates are modelled.read more
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Introducing the Illustris Project: simulating the coevolution of dark and visible matter in the Universe
Mark Vogelsberger,Shy Genel,Volker Springel,Volker Springel,Paul Torrey,Debora Sijacki,Dandan Xu,Gregory F. Snyder,Dylan Nelson,Lars Hernquist +9 more
TL;DR: The Illustris Project as mentioned in this paper is a series of large-scale hydrodynamical simulations of galaxy formation, which includes primordial and metal-line cooling with self-shielding corrections, stellar evolution, stellar feedback, gas recycling, chemical enrichment, supermassive black hole growth, and feedback from active galactic nuclei.
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Galactic star formation and accretion histories from matching galaxies to dark matter haloes
TL;DR: In this article, a multi-epoch abundance matching (MEAM) model was proposed to determine the relationship between the stellar masses of galaxies and the masses of their host dark matter haloes over the entire cosmic history from z � 4 to the present.
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Overview of the SDSS-IV MaNGA Survey: Mapping nearby Galaxies at Apache Point Observatory
Kevin Bundy,Matthew A. Bershady,David R. Law,Renbin Yan,Niv Drory,Nicholas MacDonald,David A. Wake,Brian Cherinka,José R. Sánchez-Gallego,Anne-Marie Weijmans,Daniel Thomas,Christy Tremonti,Karen L. Masters,Lodovico Coccato,Lodovico Coccato,Aleksandar M. Diamond-Stanic,Alfonso Aragón-Salamanca,Vladimir Avila-Reese,Carles Badenes,Jesús Falcón-Barroso,Francesco Belfiore,Dmitry Bizyaev,Guillermo A. Blanc,Joss Bland-Hawthorn,Michael R. Blanton,Joel R. Brownstein,Nell Byler,Michele Cappellari,Charlie Conroy,Aaron A. Dutton,Eric Emsellem,Eric Emsellem,Eric Emsellem,James Etherington,Peter M. Frinchaboy,Hai Fu,James E. Gunn,Paul Harding,Evelyn J. Johnston,Guinevere Kauffmann,Karen Kinemuchi,Mark A. Klaene,Johan H. Knapen,Alexie Leauthaud,Cheng Li,Lihwai Lin,Roberto Maiolino,Viktor Malanushenko,Elena Malanushenko,Shude Mao,Claudia Maraston,Richard M. McDermid,Richard M. McDermid,Michael R. Merrifield,Robert C. Nichol,Daniel Oravetz,Kaike Pan,John K. Parejko,Sebastián F. Sánchez,David J. Schlegel,Audrey Simmons,Oliver Steele,Matthias Steinmetz,Karun Thanjavur,Benjamin A. Thompson,Jeremy L. Tinker,Remco C. E. van den Bosch,Kyle B. Westfall,David Wilkinson,Shelley A. Wright,Ting Xiao,Kai Zhang +71 more
TL;DR: MaNGA (Mapping Nearby Galaxies at Apache Point Observatory) as mentioned in this paper employs dithered observations with 17 fiber-bundle integral field units that vary in diameter from 12'' (19 fibers) to 32'' (127 fibers).
Journal ArticleDOI
First results from the IllustrisTNG simulations: matter and galaxy clustering
Volker Springel,Volker Springel,Rüdiger Pakmor,Annalisa Pillepich,Rainer Weinberger,Dylan Nelson,Lars Hernquist,Mark Vogelsberger,Shy Genel,Shy Genel,Paul Torrey,Federico Marinacci,Jill Naiman +12 more
TL;DR: In this article, the authors used the IllustrisTNG simulations to study the non-linear correlation functions and power spectra of baryons, dark matter, galaxies and haloes over an exceptionally large range of scales.
Journal ArticleDOI
Mass assembly in quiescent and star-forming galaxies since z ≃ 4 from UltraVISTA
Olivier Ilbert,H. J. McCracken,O. Le Fèvre,Peter Capak,James Dunlop,Alexander Karim,M. A. Renzini,Karina Caputi,Samuel Boissier,Stéphane Arnouts,Herve Aussel,Johan Comparat,Qi Guo,P. Hudelot,Jeyhan S. Kartaltepe,Jean-Paul Kneib,J.-K. Krogager,E. Le Floc'h,S. J. Lilly,Yannick Mellier,Bo Milvang-Jensen,Thibaud Moutard,Masato Onodera,Johan Richard,Mara Salvato,David B. Sanders,N. Z. Scoville,John D. Silverman,Yoshiaki Taniguchi,Lidia Tasca,R. Thomas,Sune Toft,Laurence Tresse,Daniela Vergani,M. Wolk,Andrew Zirm +35 more
TL;DR: In this article, the authors estimate the galaxy stellar mass function and stellar mass density for star-forming and quiescent galaxies with 0.2 − 1.5 consistent with the expected uncertainties.
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