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We investigate early galaxy evolution by modeling self-consistently their radially-resolved evolution of gas, stars, heavy elements, and dust content. Our model successfully reproduces various observed properties of JWST-identified galaxies…

星系天体物理 · 物理学 2025-02-19 Daisuke Toyouchi , Hidenobu Yajima , Andrea Ferrara , Kentaro Nagamine

We study the growth of the red sequence through the number density and structural evolution of a sample of young and old quiescent galaxies at 0<z<2. The galaxies are selected from the NEWFIRM Medium-Band Survey (NMBS) in the Cosmic…

宇宙学与河外天体物理 · 物理学 2015-06-03 Katherine E. Whitaker , Mariska Kriek , Pieter G. van Dokkum , Rachel Bezanson , Gabriel Brammer , Marijn Franx , Ivo Labbe

Star formation histories (SFHs) of galaxies are affected by a variety of factors, both external (field vs. cluster/group) and internal (presence of a bar and AGN, morphological type). In this work, we extend our previous study and apply the…

星系天体物理 · 物理学 2024-05-01 Maria Lomaeva , Amélie Saintonge , Ilse De Looze

Star-formation and the Starburst phenomenon are presented with respect to a number of nearby star-forming galaxies where our understanding of the process can be calibrated. Methods of estimating star-formation rates are discussed together…

天体物理学 · 物理学 2007-05-23 T. W. B. Muxlow , R. J. Beswick , A. M. S. Richards , H. Thrall

Winds are predicted to be ubiquitous in low-mass, actively star-forming galaxies. Observationally, winds have been detected in relatively few local dwarf galaxies, with even fewer constraints placed on their timescales. Here, we compare…

星系天体物理 · 物理学 2018-04-11 Kristen B. W. McQuinn , Evan D. Skillman , Taryn N. Heliman , Noah P. Mitchell , Tyler Kelley

Owing to their proximity to the Milky Way, the Large and Small Magellanic Clouds (L/SMC) uniquely probe the evolution of low-mass galaxies undergoing mutual interactions. In this work, we investigate the connection between the star…

We use numerical simulation to investigate the triggering of starbursts in merging disk galaxies. The properties of the merger-driven starbursts are sensitive to the structure of the progenitor galaxies; specifically, to the amount of…

天体物理学 · 物理学 2007-05-23 Chris Mihos , Lars Hernquist

In this paper we study the underlying stellar population of a sample of 65 nearby early-type galaxies predominantly located in low density environments. Ages, metallicities and [alpha/Fe] ratios have been derived through the comparison of…

天体物理学 · 物理学 2010-10-28 F. Annibali , A. Bressan , R. Rampazzo , W. W. Zeilinger , L. Danese

Submillimeter bright galaxies in the early Universe are vigorously forming stars at ~1000 times higher rate than the Milky Way. A large fraction of stars is formed in the central 1 kiloparsec region, that is comparable in size to massive,…

Despite the huge amount of photometric and spectroscopic efforts targetting the Galactic bulge over the past few years, its age distribution remains controversial owing to both the complexity of determining the age of individual stars and…

We study the response of the gaseous component of a galactic disc to the time dependent potential generated by N-body simulations of a spiral galaxy. The results show significant variation of the spiral structure of the gas which might be…

天体物理学 · 物理学 2009-11-11 C. Clarke , D. Gittins

The star formation rate - stellar mass relation (SFR-M*) and its evolution (i.e., the SFR main sequence) describes the growth rate of galaxies of a given stellar mass and at a given redshift. Assuming that present-day star-forming galaxies…

宇宙学与河外天体物理 · 物理学 2012-01-17 Samuel N. Leitner

We use the self-consistent model technique developed by Mart\'in-Manj\'on et al. (2008) that combines the chemical evolution with stellar population synthesis and photo-ionization codes, to study the star formation scenarios capable of…

宇宙学与河外天体物理 · 物理学 2015-06-03 M. L. Martín-Manjón , M. Mollá , A. I. Díaz , R. Terlevich

We combine data from ALMA and MUSE to study the resolved (~300 pc scale) star formation relation (star formation rate vs. molecular gas surface density) in cluster galaxies. Our sample consists of 9 Fornax cluster galaxies, including…

The reddening properties and the star formation history of a sample of 19 starburst galaxies are investigated using multiwavelength spectroscopy and infrared broad band photometry. The difference in reddening between the ionized gas and the…

天体物理学 · 物理学 2008-11-26 Daniela Calzetti

We study the effect of a single, instantaneous starburst on the dynamical and chemical evolution of a gas-rich dwarf galaxy, whose potential well is dominated by a dark matter halo. We follow the dynamical and chemical evolution of the ISM…

天体物理学 · 物理学 2009-10-31 Simone Recchi , Francesca Matteucci , Annibale D'Ercole

Constraining the star formation histories (SFHs) of individual galaxies is crucial to understanding the mechanisms that regulate their evolution. Here, we combine multi-wavelength (ultraviolet, optical, and infrared) measurements of a very…

星系天体物理 · 物理学 2016-06-15 Camilla Pacifici , Sree Oh , Kyuseok Oh , Jaehyun Lee , Sukyoung K. Yi

The analysis of galaxies on the star formation rate - stellar mass (SFR-M*) plane is a powerful diagnostic for galaxy evolution at different cosmic times. We consider a sample of 24463 galaxies from the CANDELS/GOODS-S survey to conduct a…

星系天体物理 · 物理学 2018-01-24 L. Bisigello , K. I. Caputi , N. Grogin , A. Koekemoer

HI in galaxies traces the fuel for future star formation and reveals the effects of feedback on neutral gas. Using a statistically uniform, HI-selected sample of 565 galaxies from the ALFALFA H-alpha survey, we explore HI properties as a…

星系天体物理 · 物理学 2015-08-06 A. E. Jaskot , M. S. Oey , J. J. Salzer , A. Van Sistine , E. F. Bell , M. P. Haynes

We investigate radial gradients in the recent star formation history (SFH) using 1917 galaxies with $0.01<z<0.14$ and integral-field spectroscopy from the ongoing MaNGA survey. For each galaxy, we obtain two-dimensional maps and radial…