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We study galaxy pair samples selected from the Sloan Digital Sky Survey (SDSS-DR7) and we perform an analysis of minor and major mergers with the aim of investigating the dependence of galaxy properties on interactions. We build a galaxy…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 Diego G. Lambas , Sol Alonso , Valeria Mesa , Ana Laura O'Mill

Models of Stellar Population Synthesis (SPS) provide a predictive framework for the spectral energy distribution (SED) of a galaxy. SPS predictions can be computationally intensive, creating a bottleneck for attempts to infer the physical…

Astrophysics of Galaxies · Physics 2025-12-03 Georgios Zacharegkas , Andrew Hearin , Andrew Benson

We aim at developing a robust methodology for constraining the luminosity and stellar mass functions (LMFs) of galaxies by solely using data from multi-filter surveys and testing the potential of these techniques for determining the…

We study the statistical properties of the wide binary population in the Galaxy field with projected separations larger than 200 AU by constructing the stellar angular two-point correlation function (2PCF) from a homogeneous sample of…

Solar and Stellar Astrophysics · Physics 2010-01-28 M. Longhitano , B. Binggeli

We present a catalog of stellar parameters (effective temperature $T_{\rm eff}$, surface gravity $\log g$, age, and metallicity [Fe/H]) and elemental-abundance ratios ([C/Fe], [Mg/Fe], and [$\alpha$/Fe]) for some five million stars (4.5…

The (rest-frame) near-IR domain contains important stellar population diagnostics and is often used to estimate masses of galaxies at low as well as high redshifts. However, many stellar population models are still relatively poorly…

Astrophysics · Physics 2008-11-26 Peter M. Pessev , Paul Goudfrooij , Thomas H. Puzia , Rupali Chandar

We have observed 150 regions of massive star formation, selected originally by the presence of a water maser, in the J = 5-4, 3-2, and 2-1 transitions of CS, and 49 regions in the same transitions of C$^{34}$S. Over 90% of the 150 regions…

Astrophysics · Physics 2011-05-25 Rene Plume , D. T. Jaffe , Neal J. Evans , J. Martin-Pintado , J. Gomez-Gonzalez

Over the past decades, several studies have discovered a population of galaxies undergoing very strong star formation events, called extreme emission line galaxies (EELGs). In this work, we exploit the capabilities of the Javalambre…

We present a new approach to constrain galaxy physical parameters from the combined interpretation of stellar and nebular emission in wide ranges of observations. This approach relies on the Bayesian analysis of any type of galaxy spectral…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 Camilla Pacifici , Stephane Charlot , Jeremy Blaizot , Jarle Brinchmann

Estimating stellar masses for billions of galaxies in upcoming surveys requires methods that are both accurate and computationally efficient. We present a new approach using symbolic regression trained on a simulation to derive simple,…

We use NIRCam imaging from the JWST Advanced Deep Extragalactic Survey (JADES) to study the ionising properties of a sample of 15721 galaxies at $3 \leq z_{\rm{phot}} \leq 9$, 90\% complete in stellar mass down to…

Detailed analyses of high-redshift galaxies are challenging due to their faintness, but this difficulty can be overcome with gravitational lensing, in which the magnification of the flux enables high signal-to-noise ratio (S/N)…

Astrophysics of Galaxies · Physics 2021-12-08 Annalisa Citro , Dawn K. Erb , Max Pettini , Matthew W. Auger , George D. Becker , Bethan L. James

Stellar population synthesis (SPS) provides the link between the stellar and dust content of galaxies and their observed spectral energy distributions. In the present work we perform a comprehensive calibration of our own flexible SPS…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-20 Charlie Conroy , James E. Gunn

Observations of the high-$z$ Universe from JWST have revealed a new population of bright, early galaxies. A robust statistical interpretation of this data requires fast forward models that account for uncertainties in galaxy evolution and…

Astrophysics of Galaxies · Physics 2024-10-16 Trey Driskell , Ethan O. Nadler , Andrew Benson , Vera Gluscevic

Ground-based, high-resolution bolometric (sub)millimeter continuum mapping observations on spatially extended target sources are often subject to significant missing fluxes. This hampers accurate quantitative analyses. Missing flux can be…

Instrumentation and Methods for Astrophysics · Physics 2022-08-02 Sihan Jiao , Yuxin Lin , Xiangyu Shui , Jingwen Wu , Zhiyuan Ren , Di Li

[Abridged] We make use of a semi-analytic cosmological model that includes simple prescriptions for dust attenuation and emission to make predictions for the observable and physical properties of galaxies that may be detected by the…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 Sami-Matias Niemi , Rachel S. Somerville , Henry C. Ferguson , Kuang-Han Huang , Jennifer Lotz , Anton M. Koekemoer

This thesis aims at discerning the effect of environment on galaxy evolution and on the properties of galaxies, using the data from the miniJPAS survey, a 1~deg$^2$ survey that uses the same photometric filter system as the incoming J-PAS…

Astrophysics of Galaxies · Physics 2024-10-24 Julio E. Rodríguez-Martín

We present deep H$\alpha$ imaging of three nearby dwarf galaxies, carefully selected to optimize observations with the Maryland-Magellan Tunable Filter (MMTF) on the Magellan 6.5m telescope. An effective bandpass of $\sim$13\AA\ is used,…

Astrophysics of Galaxies · Physics 2016-02-17 Janice C. Lee , Sylvain Veilleux , Michael McDonald , Bryan Hilbert

We present a dedicated automated pipeline to construct spatially resolved emission H$\alpha$+[NII] maps and to derive the spectral energy distributions (SEDs) in 12 optical filters (five broad and seven narrow/medium) of H$\alpha$ emission…

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