Simulating the formation and evolution of galaxies: Multi-phase description of the interstellar medium, star formation, and energy feedback
Emiliano Merlin,Cesare Chiosi +1 more
Reads0
Chats0
TLDR
In this paper, a multi-phase representation of the ISM in NB-TSPH simulations of galaxy formation and evolution with particular attention to the case of early-type galaxies is presented.Abstract:
We present a multi-phase representation of the ISM in NB-TSPH simulations of galaxy formation and evolution with particular attention to the case of early-type galaxies. Cold gas clouds are described by the so-called sticky particles algorithm. They can freely move throughout the hot ISM medium; stars form within these clouds and the mass exchange among the three baryonic phases (hot gas, cold clouds, stars) is governed by radiative and Compton cooling and energy feedback by supernova (SN) explosions, stellar winds, and UV radiation. We also consider thermal conduction, cloud-cloud collisions, and chemical enrichment. Our model agrees with and improves upon previous studies on the same subject. The results for the star formation rate are very promising and agree with recent observational data on early-type galaxies. These models lend further support to the revised monolithic scheme of galaxy formation, which has recently been also strengthened by high redshift data leading to the so-called downsizing and top-down scenarios.read more
Citations
More filters
Journal ArticleDOI
A new framework for understanding the evolution of early-type galaxies
Mauro D'Onofrio,Cesare Chiosi +1 more
TL;DR: In this paper , the authors derived the mutual relationship among the stellar mass, effective radius, velocity dispersion, and luminosity of ETGs as a function of the ϵ-factor and calculated the coefficients of the FP.
References
More filters
Journal ArticleDOI
Evidence for a Massive Post-Starburst Galaxy at z ~ 6.5
Bahram Mobasher,Mark Dickinson,H. C. Ferguson,M. Giavalisco,Tommy Wiklind,Daniel P. Stark,Richard S. Ellis,Michael Fall,Norman A. Grogin,Leonidas A. Moustakas,Nino Panagia,M. Sosey,Massimo Stiavelli,E. Bergeron,Stefano Casertano,P.I ngraham,Anton M. Koekemoer,Ivo Labbé,Mario Livio,B. Rodgers,Claudia Scarlata,Joel Vernet,Alvio Renzini,Piero Rosati,H. Kuntschner M. Kummel,Jeremy R. Walsh,Ranga-Ram Chary,Peter Eisenhardt,Daniel Stern +28 more
TL;DR: In this article, the authors search for very massive galaxies at high redshifts and find one particularly remarkable candidate, which is consistent with a galaxy at z ~ 6.5 and a stellar mass of 6x10e11 M(sun) (for a Salpeter IMF).
Journal ArticleDOI
Star formation and chemical evolution in smoothed particle hydrodynamics simulations: a statistical approach
TL;DR: In this article, a statistical algorithm for star formation and chemical evolution was proposed for smoothed particle hydrodynamics (SPH) simulations with large numbers of particles, and for parallel SPH codes.
Journal ArticleDOI
Spitzer irs spectra of virgo early type galaxies: detection of stellar silicate emission
Alessandro Bressan,Alessandro Bressan,P. Panuzzo,Lucio M. Buson,Marcel Clemens,Gian Luigi Granato,Gian Luigi Granato,Roberto Rampazzo,Laura Silva,José R. Valdés,O. Vega,Luigi Danese +11 more
TL;DR: In this article, high signal-to-noise ratio Spitzer Infrared Spectrograph observations of 17 Virgo early-type galaxies were used to detect the silicate emission of their dusty, mass-losing evolved stars.
Journal ArticleDOI
The star formation history of early-type galaxies as a function of mass and environment
Marcel Clemens,Alessandro Bressan,Alessandro Bressan,Bojan Nikolic,Paul Alexander,Francesca Annibali,Roberto Rampazzo +6 more
TL;DR: In this paper, a volume-limited sample of early-type galaxies in the redshift range 0.005 < z≤ 0.1 was used to define the density of the local environment for each galaxy using a method which takes account of the redshifted bias introduced by survey boundaries.
Journal ArticleDOI
Formation and evolution of galactic disks with a multiphase numerical model
B. Semelin,Francoise Combes +1 more
TL;DR: In this paper, a numerical model with particular attention to the multiphase nature of the interstellar medium is proposed, where a warm gas phase (10 4 K) is treated as a continuous fluid by an SPH algorithm, and a cold gas phase is fragmented in clouds, treated by a low-dissipation sticky particle component.
Related Papers (5)
Formation and evolution of galactic disks with a multiphase numerical model
B. Semelin,Francoise Combes +1 more