Modelling the galaxy bimodality: shutdown above a critical halo mass
TLDR
In this paper, the authors reproduce the blue and red sequences in the observed joint distribution of colour and magnitude for galaxies at low and high redshifts using hybrid N-body/semi-analytic simulations of galaxy formation.Abstract:
We reproduce the blue and red sequences in the observed joint distribution of colour and magnitude for galaxies at low and high redshifts using hybrid N-body/semi-analytic simulations of galaxy formation. The match of model and data is achieved by mimicking the effects of cold flows versus shock heating coupled to feedback from active galactic nuclei (AGNs), as predicted by Dekel and Birnboim. After a critical epoch z ∼ 3, only haloes below a critical shock-heating mass M shock ∼ 10 12 Menjoy gas supply by cold flows and form stars, while cooling and star formation are shut down abruptly above this mass. The shock-heated gas is kept hot because being dilute it is vulnerable to feedback from energetic sources such as AGNs in their self-regulated mode. The shutdown explains in detail the bright-end truncation of the blue sequence at ∼L ∗, the appearance of luminous red-and-dead galaxies on the red sequence starting already at z ∼ 2, the colour bimodality, its strong dependence on environment density and its correlations with morphology and other galaxy properties. Before z ∼ 2-3, even haloes above the shock-heating mass form stars by cold streams penetrating through the hot gas. This explains the bright star forming galaxies at z ∼ 3-4, the early appearance of massive galaxies on the red sequence, the high cosmological star formation rate at high redshifts and the subsequent low rate at low redshifts.read more
Citations
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Coevolution (Or Not) of Supermassive Black Holes and Host Galaxies
John Kormendy,Luis C. Ho +1 more
TL;DR: In this paper, supermassive black holes (BHs) have been found in 85 galaxies by dynamical modeling of spatially resolved kinematics, and it has been shown that BHs and bulges coevolve by regulating each other's growth.
Journal ArticleDOI
Mass and environment as drivers of galaxy evolution in SDSS and zCOSMOS and the origin of the Schechter function
Yingjie Peng,Simon J. Lilly,Katarina Kovac,Micol Bolzonella,Lucia Pozzetti,Alvio Renzini,G. Zamorani,Olivier Ilbert,C. Knobel,A. Iovino,Christian Maier,Olga Cucciati,Lidia Tasca,C. Marcella Carollo,John D. Silverman,P. Kampczyk,Loic de Ravel,David B. Sanders,Nick Scoville,Thierry Contini,Vincenzo Mainieri,Marco Scodeggio,Jean-Paul Kneib,Olivier Le Fevre,S. Bardelli,Angela Bongiorno,Karina Caputi,Graziano Coppa,Sylvain de la Torre,P. Franzetti,Bianca Garilli,F. Lamareille,Jean-Francois Le Borgne,Vincent Le Brun,M. Mignoli,Enrique Perez Montero,R. Pello,E. Ricciardelli,Masayuki Tanaka,Laurence Tresse,Daniela Vergani,Niraj Welikala,E. Zucca,Pascal Oesch,U. Abbas,Luke A. Barnes,Rongmon Bordoloi,D. Bottini,A. Cappi,Paolo Cassata,Andrea Cimatti,M. Fumana,Günther Hasinger,Anton M. Koekemoer,A. Leauthaud,D. Maccagni,Christian Marinoni,H. J. McCracken,P. Memeo,B. Meneux,Preethi Nair,Cristiano Porciani,V. Presotto,Roberto Scaramella +63 more
TL;DR: In this paper, the authors explore the simple interrelationships between mass, star formation rate, and environment in the SDSS, zCOSMOS, and other deep surveys.
Journal ArticleDOI
Cold streams in early massive hot haloes as the main mode of galaxy formation.
Avishai Dekel,Yuval Birnboim,Yuval Birnboim,G. Engel,Jonathan Freundlich,Tobias Goerdt,Michael Mumcuoglu,Eyal Neistein,C. Pichon,Romain Teyssier,Romain Teyssier,E. Zinger +11 more
TL;DR: ‘stream-fed galaxies’ are reported, formed from steady, narrow, cold gas streams that penetrate the shock-heated media of massive dark matter haloes and keep the rotating disk configuration intact, although turbulent and broken into giant star-forming clumps that merge into a central spheroid.
Dwarf galaxies, cold dark matter, and biased galaxy formation
Avishai Dekel,Joseph Silk +1 more
TL;DR: In this article, a reexamination is conducted of the formation of dwarf, diffuse, metal-poor galaxies due to supernova-driven winds, in view of data on the systematic properties of dwarfs in the Local Group and Virgo Cluster.
Journal ArticleDOI
Galaxy luminosity functions to z∼ 1 from DEEP2 and COMBO-17: Implications for red galaxy formation
Sandra M. Faber,Christopher N. A. Willmer,Christian Wolf,David C. Koo,Benjamin J. Weiner,Jeffrey A. Newman,Myungshin Im,Alison L. Coil,C. Conroy,Michael C. Cooper,Michael Davis,Douglas P. Finkbeiner,Brian F. Gerke,Karl Gebhardt,Edward J. Groth,Puragra Guhathakurta,Justin Harker,Nick Kaiser,Susan A. Kassin,M. Kleinheinrich,N. P. Konidaris,Richard G. Kron,Lihwai Lin,Lihwai Lin,G. A. Luppino,Darren Madgwick,Klaus Meisenheimer,Kai G. Noeske,Andrew C. Phillips,Vicki L. Sarajedini,Ricardo P. Schiavon,Luc Simard,Alexander S. Szalay,Nicole P. Vogt,Renbin Yan +34 more
TL;DR: The DEEP2 and COMBO-17 surveys are compared to study luminosity functions of red and blue galaxies to z ~ 1, and the results imply that the number and total stellar mass of blue galaxies have been substantially constant since z = 1, whereas those of red galaxies (near L*) have been significantly rising as mentioned in this paper.
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