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The degree of influence that environment and mass have on the stellar populations of early-type galaxies is uncertain. In this paper we present the results of a spectroscopic analysis of the stellar populations of early-type galaxies aimed…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 Craig Harrison , Matthew Colless , Harald Kuntschner , Warrick Couch , Roberto De Propris , Michael Pracy

We present selected results from integral-field spectroscopy of 48 early-type galaxies observed as part of the SAURON survey. Maps of the Hbeta, Fe5015, Mgb and Fe5270 indices in the Lick/IDS system were derived for each of the survey…

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…

We present spectroscopic linestrength data for 4097 red-sequence galaxies in 93 low-redshift galaxy clusters, and use these to investigate variations in average stellar populations as a function of galaxy mass. Our analysis includes an…

Working with 108,786 Sloan Digital Sky Survey low redshift galaxies we have examined the relation between galaxy mass, metallicity, radius, and star formation rates primarily in the central portions of galaxies. We subdivided the redshift…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 Drew Brisbin , Martin Harwit

We investigate the stellar population properties of a sample of 24 massive quenched galaxies at $1.25<z_\mathrm{spec}<2.09$ identified in the COSMOS field with our Subaru/MOIRCS near-IR spectroscopic observations. Tracing the stellar…

Astrophysics of Galaxies · Physics 2015-07-01 M. Onodera , C. M. Carollo , A. Renzini , M. Cappellari , C. Mancini , N. Arimoto , E. Daddi , R. Gobat , V. Strazzullo , S. Tacchella , Y. Yamada

We investigate the stellar Mass-Metallicity Relation (MZR) using a sample of 637 quiescent galaxies with 10.4 <= log(M*/M ) < 11.7 selected from the LEGA-C survey at 0.6 <= z <= 1. We derive mass-weighted stellar metallicities using…

Astrophysics of Galaxies · Physics 2024-10-09 D. Bevacqua , P. Saracco , A. Boecker , G. D'Ago , G. De Lucia , R. De Propris , F. La Barbera , A. Pasquali , C. Spiniello , C. Tortora

Although galaxy evolution is governed by the interplay between baryonic physics and dark matter halo assembly, how halo properties shape observed galaxies remains unclear. With current challenges in measuring halo properties, the…

Astrophysics of Galaxies · Physics 2026-03-25 L. Scholz-Diaz , A. R. Gallazzi , S. Zibetti , D. Mattolini

Stellar populations carry information about the formation of galaxies and their evolution up to the present epoch. A wealth of observational data are available nowadays, which are analysed with stellar population models in order to obtain…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 Claudia Maraston

Context: The mass-metallicity relationship (MMR) of star-forming galaxies is well-established, however there is still some disagreement with respect to its exact shape and its possible dependence on other observables. Aims: We measure the…

We have performed deep imaging of a diverse sample of 26 low surface brightness galaxies (LSBGs) in the optical and the near-infrared. Using stellar population synthesis models, we find that it is possible to place constraints on the ratio…

It is well known that the clustering of galaxies depends on galaxy type.Such relative bias complicates the inference of cosmological parameters from galaxy redshift surveys, and is a challenge to theories of galaxy formation and evolution.…

We present a new test of gravitational physics by comparing the growth rate of cosmic structure measured around voids with that measured around galaxies in the same large-scale structure dataset, the low-redshift 6-degree Field Galaxy…

Cosmology and Nongalactic Astrophysics · Physics 2017-04-12 Ixandra Achitouv , Chris Blake , Paul Carter , Jun Koda , Florian Beutler

We present results from SPH-cosmological simulations, including self-consistent modelling of SN feedback and chemical evolution, of galaxies belonging to two clusters and twelve groups. We reproduce the mass-metallicity (ZM) relation of…

Cosmology and Nongalactic Astrophysics · Physics 2014-09-08 A. D. Romeo Velonà , J. Sommer-Larsen , N. R. Napolitano , V. Antonuccio-Delogu , S. Cielo , I. Gavignaud

Dwarf galaxies are generally faint. To derive their age and metallicity distributions, it is critical to optimize the use of any collected photon. Koleva et al., using full spectrum fitting, have found strong population gradients in some…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 M. Koleva , A. Bedregal , Ph. Prugniel , S. De Rijcke , W. W. Zeilinger

We present constraints on the massive star and ionized gas properties for a sample of 62 star-forming galaxies at $z\sim2.3$. Using BPASS stellar population models, we fit the rest-UV spectra of galaxies in our sample to estimate age and…

The scaling relationship is a fundamental probe of the evolution of galaxies. Using the integral field spectroscopic data from the Mapping Nearby Galaxies at Apache Point Observatory survey, we select 1698 spaxels with significant detection…

Astrophysics of Galaxies · Physics 2022-02-23 Yao Yao , Haiyang Liu , Xu Kong , Yulong Gao , Guangwen Chen , Xinkai Chen , Zhixiong Liang , Zesen Lin , Yimeng Tang , Hongxin Zhang

We take advantage of the publicly available LEGA-C spectroscopic survey to measure the stellar population properties of 140 individual massive and passive galaxies at $z\sim0.7$. We develop and publicly release PyLick, a flexible python…

Astrophysics of Galaxies · Physics 2022-03-15 Nicola Borghi , Michele Moresco , Andrea Cimatti , Alexandre Huchet , Salvatore Quai , Lucia Pozzetti

Using the equatorial Galaxy and Mass Assembly (GAMA) dataset, we investigate how the low-redshift galaxy stellar mass function (GSMF) varies across different galaxy populations and as a function of halo mass. We find that: (i) The GSMF of…

Astrophysics of Galaxies · Physics 2026-02-11 A. Sbaffoni , J. Liske , A. S. G. Robotham , L. J. M. Davies , S. P. Driver , E. N. Taylor

Using very deep, high spectral resolution data from the SAMI Integral Field Spectrograph we study the stellar population properties of a sample of dwarf galaxies in the Fornax Cluster, down to a stellar mass of $10^{7}$ M$_{\odot}$, which…