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We describe a novel method for determining the demographics of a population of star clusters, for example distributions of cluster mass and age, from unresolved photometry. This method has a number of desirable properties: it fully exploits…

Astrophysics of Galaxies · Physics 2018-11-07 Mark R. Krumholz , Angela Adamo , Michele Fumagalli , Daniela Calzetti

We present F850LP-F160W color gradients for 11 early-type galaxies (ETGs) at 1.0<z_spec<1.9. Significant negative F850LP-F160W color gradients have been detected in ~70% of our sample within the effective radius R_e, the remaining 30%…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 A. Gargiulo , P. Saracco , M. Longhetti , F. La Barbera , S. Tamburri

This is the third paper of a series where we study the stellar population gradients (SP; ages, metallicities, $\alpha$-element abundance ratios and stellar initial mass functions) of early type galaxies (ETGs) at $z\le 0.08$ from the…

Astrophysics of Galaxies · Physics 2020-05-27 H. Domínguez Sánchez , M. Bernardi , F. Nikakhtar , B. Margalef-Bentabol , R. K. Sheth

Determining precise stellar ages and masses for evolved giants is crucial for Galactic archaeology but challenged by spectral degeneracies. Gaia's low-resolution XP spectra offer a unique opportunity to infer these parameters on a massive…

Gas rich galaxies are typically star-forming. We make use of HI-MaNGA, a program of HI follow-up for the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey of the Sloan Digital Sky Surveys to construct a sample of unusual…

Environment has long been known to have significant impact on the evolution of galaxies, but here we seek to quantify the subtler differences that might be found in disk galaxies, depending on whether they are isolated, the most massive…

The aim of this paper is to study the stellar population of galaxies hosting an active galactic nucleus (AGN). We studied a sub-sample of hard X-ray emitting AGNs from the INTEGRAL and Swift catalogs which were previously identified and…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 L. Morelli , V. Calvi , N. Masetti , P. Parisi , R. Landi , E. Maiorano , D. Minniti , G. Galaz

Our aim in this work is to answer, using simulated narrow-band photometry data, the following general question: What can we learn about galaxies from these new generation cosmological surveys? For instance, can we estimate stellar age and…

Cosmology and Nongalactic Astrophysics · Physics 2012-10-29 William Schoenell , Roberto Cid Fernandes , Narciso Benítez , Natalia Vale Asari

The PHANGS survey uses ALMA, HST, VLT, and JWST to obtain an unprecedented high-resolution view of nearby galaxies, covering millions of spatially independent regions. The high dimensionality of such a diverse multi-wavelength dataset makes…

Gas-phase metallicity is a fundamental parameter that helps constrain the star-forming history and chemical evolution of a galaxy. Measuring electron temperature through auroral-to-strong line ratios is a direct approach to deriving…

Astrophysics of Galaxies · Physics 2025-11-26 Ziming Peng , Renbin Yan , Xihan Ji , Zesen Lin , Man-Yin Leo Lee

Large-$N$ galaxy surveys offer unprecedented opportunities to probe weak gravitation in galaxy dynamics that may contain correlations tracing background cosmology. Of particular interest is the potential of finite sensitivities to the…

Cosmology and Nongalactic Astrophysics · Physics 2025-01-22 Gyeong-Min Lee , Maurice H. P. M. van Putten

We present the HI-MaNGA programme of HI follow-up for the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey. MaNGA, which is part of the Fourth phase of the Sloan Digital Sky Surveys (SDSS-IV), is in the process of…

We select 456 galaxies with kinematically misaligned gas and stellar components from 9546 parent galaxies in MaNGA, and classify them into 72 star-forming galaxies, 142 green-valley galaxies and 242 quiescent galaxies. Comparing the spatial…

Astrophysics of Galaxies · Physics 2022-02-16 Haitong Xu , Yanmei Chen , Yong Shi , Yuren Zhou , Dmitry Bizyaev , Min Bao , Minje Beom , José G. Fernández-Trincado , Xiao Cao

We investigate the connection between stellar mass distribution, assembly history, and star formation timescales in low-redshift massive early-type galaxies (ETGs) by combining deep LegacySurvey imaging with MaNGA's spatially resolved…

Astrophysics of Galaxies · Physics 2026-03-04 Xiao-Ya Zhang , Song Huang , Meng Gu

Using kinematic maps from the Sloan Digital Sky Survey (SDSS) Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, we reveal that the majority of low-mass quenched galaxies exhibit coherent rotation in their stellar…

We report the stellar atmospheric parameters for 7503 spectra contained in the first release of the MaNGA stellar library (MaStar) in SDSS DR15. The first release of MaStar contains 8646 spectra measured from 3321 unique stars, each…

Dust in Early-Type galaxies (ETGs) may originate from internal or external sources. In this paper we study the stellar populations of particularly dusty ETGs to search for evidence of the dust's origin. Using the Southern African Large…

Astrophysics of Galaxies · Physics 2026-04-08 Ron W. Savage , Anne E. Sansom , David H. W. Glass

Using the integral field unit (IFU) data from Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, we collect a sample of 36 star forming galaxies that host galactic-scale outflows in ionized gas phase. The control sample is…

Astrophysics of Galaxies · Physics 2021-05-12 Min Bao , Yanmei Chen , Qirong Yuan , Yong Shi , Dmitry Bizyaev , Xiaoling Yu , Shuai Feng , Xiao Cao , Yulong Gao , Qiusheng Gu , Ying Yu

A key task of observational extragalactic astronomy is to determine where -- within galaxies of diverse masses and morphologies -- stellar mass growth occurs, how it depends on galaxy properties and what processes regulate star formation.…

Gradients in the stellar populations (SP) of galaxies -- e.g., in age, metallicity, stellar Initial Mass Function (IMF) -- can result in gradients in the stellar mass to light ratio, $M_*/L$. Such gradients imply that the distribution of…

Astrophysics of Galaxies · Physics 2022-11-30 M. Bernardi , R. K. Sheth , H. Dominguez Sanchez , B. Margalef-Bentabol , D. Bizyaev , R. R. Lane