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The star formation history (SFH) of galaxies allow us to investigate when galaxies formed their stars and assembled their mass. We can constrain the SFH with high level of precision from galaxies with resolved stellar populations, since we…

Astrophysics of Galaxies · Physics 2019-02-18 Maria Argudo-Fernández , Médéric Boquien , Shiyin Shen , Fangting Yuan , Jun Yin , Ruixiang Chang , Lei Hao

We investigate the bursty star formation histories (SFHs) of dwarf galaxies using the distribution of log($L_{H\alpha}/L_{UV}$) of 185 local galaxies. We expand on the work of Weisz et al. 2012 to consider a wider range of SFHs and stellar…

Astrophysics of Galaxies · Physics 2019-08-21 Najmeh Emami , Brian Siana , Daniel R. Weisz , Benjamin D. Johnson , Xiangcheng Ma , Kareem El-Badry

We examine galaxy formation in a cosmological AMR simulation, which includes two high resolution boxes, one centered on a 3 \times 10^14 M\odot cluster, and one centered on a void. We examine the evolution of 611 massive (M\ast >…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 C. N. Lackner , R. Cen , J. P. Ostriker , M. R. Joung

Post-starburst galaxies host a population of early-type stars (A or F), but simultaneously lack indicators of ongoing star formation such as OII emission. Two distinct stellar populations have been identified in these systems: a young…

Astrophysics of Galaxies · Physics 2015-06-23 Kyle D. Hiner , Gabriela Canalizo

The bar/bulge and inner disk are fundamental building blocks of the Milky Way, containing a large fraction of its stellar mass. However, stars in these regions are faint, crowded, and have high extinction, which makes studying their…

Astrophysics of Galaxies · Physics 2025-12-11 Zixian Wang , Michael R. Hayden , Sanjib Sharma , Joss Bland-Hawthorn , Anil C. Seth , Gail Zasowski

Using WFPC2 aboard the Hubble Space Telescope, we have created deep color-magnitude diagrams in the V and I passbands for approximately 100,000 stars in a field at the center of the LMC bar and another in the disk. The main--sequence…

Astrophysics · Physics 2008-11-26 Tammy A. Smecker-Hane , Andrew A. Cole , John S. Gallagher , Peter B. Stetson

Using images collected with the WFC3 camera on board of the Hubble Space Telescope, we detect stellar clumps in continuum-subtracted $H\alpha$ and ultraviolet (F275W filter), such clumps are often embedded in larger regions (star-forming…

We perform a "fossil record" analysis for ~800 low-redshift spiral galaxies, using STARLIGHT applied to integral field spectroscopic observations from the SDSS-IV MaNGA survey to obtain fully spatially-resolved high-resolution star…

We derive and analyse the star formation histories of 393 intermediate-redshift (0.1 $\leq$ z $\leq$ 0.9) galaxies with stellar masses between $\sim$10$^{8}$ - 10$^{12}$ M$_{\odot}$. We probe a cosmic time of approximately 6 Gyr and a range…

We analyze the star formation history (SFH) of galaxies as a function of present-day environment, galaxy stellar mass and morphology. The SFH is derived by means of a non-parametric spectrophotometric model applied to individual galaxies at…

In this work we study the stellar mass -- metallicity relation (MZR) of an extended sample of star-forming galaxies in the local Universe and its possible dependence with the star formation rate (SFR). A sample of $\sim$195000 Sloan Digital…

A large sample of spectroscopically confirmed galaxies at 1.4<z<3.7, with complementary imaging in the near- and mid-IR from the ground and from Hubble and Spitzer, is used to infer the average star formation histories (SFHs) of typical…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 Naveen A. Reddy , Max Pettini , Charles C. Steidel , Alice E. Shapley , Dawn K. Erb , David R. Law

Stellar populations and their distribution differ widely across the Galaxy, which is likely to affect planet demographics. Our local neighbourhood is dominated by young, metal-rich stars in the galactic thin disc, while the stellar halo and…

Earth and Planetary Astrophysics · Physics 2024-06-12 C. Boettner , P. Dayal , M. Trebitsch , N. Libeskind , K. Rice , C. Cockell , B. I. Tieleman

We investigate the ability of spectroscopic techniques to yield realistic star formation histories (SFHs) for the bulges of spiral galaxies based on a comparison with their observed broadband colors. Full spectrum fitting to optical spectra…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 Lauren A. MacArthur , Michael McDonald , Stephane Courteau , J. Jesus Gonzalez

We analyse the stellar content of a large number of HII galaxies from the continua and absorption features of their spectra using population synthesis methods, in order to gain information about the star formation histories of these…

Astrophysics · Physics 2009-11-10 P. Westera , F. Cuisinier , E. Telles , C. Kehrig

We test the impact of using variable star forming histories (SFHs) and the use of the IR luminosity (LIR) as a constrain on the physical parameters of high redshift dusty star-forming galaxies. We explore in particular the stellar…

Astrophysics of Galaxies · Physics 2017-09-13 P. Sklias , D. Schaerer , D. Elbaz , M. Pannella , C. Schreiber , A. Cava

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…

Astrophysics of Galaxies · Physics 2016-06-15 Camilla Pacifici , Sree Oh , Kyuseok Oh , Jaehyun Lee , Sukyoung K. Yi

Past studies have long emphasised the key role played by galactic stellar bars in the context of disc secular evolution, via the redistribution of gas and stars, the triggering of star formation, and the formation of prominent structures…

We investigate the formation of stellar bars in 307 Milky Way-mass disc galaxies in the TNG50 cosmological simulation. Most bars form rapidly in dynamically cold discs shortly after the central stellar mass exceeds that of dark matter. In…

Astrophysics of Galaxies · Physics 2025-08-21 Matthew Frosst , Danail Obreschkow , Aaron Ludlow , Amelia Fraser-McKelvie

We present the Star Formation History (SFH) and the age-metallicity relation (AMR) in three fields of the Fornax dwarf spheroidal galaxy. They sample a region spanning from the centre of the galaxy to beyond one core radius, which allows…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 Andrés del Pino , Sebastian L. Hidalgo , Antonio Aparicio , Carme Gallart , Ricardo Carrera , Matteo Monelli , Roberto Buonanno , Gianni Marconi