340 citations · 1.2k across the 28 of their papers we have counts for
13 papers · 1 filter
A novel data-driven approach to extract stellar population properties from galaxy spectra using absorption indices
Zahra Sharbaf, Ignacio Ferreras, Anna R. Gallazzi +3
In an era of highly complex machine learning methods that often are informative but not straightforward to interpret, Principal Component Analysis (PCA) offers a simple, easily int…
Stellar Populations in Satellite Galaxies in Close Pairs
Anne E. Sansom, Ignacio Ferreras, Benjamin F. McDonald
Satellite galaxies that are near to massive primary galaxies in close pairs can have stellar population ages that are more similar to their primaries than expected. This is one way…
Morphology across cosmic time: assessing the evolution and interplay of disk and bulge-dominated galaxies in the CANDELS survey
Vitor M. Sampaio, Igor Kolesnikov, Reinaldo R. de Carvalho +2
We investigate the redshift evolution of disk and bulge-dominated galaxies using a mass-complete sample of 14,000 galaxies from the CANDELS survey, selected with $H_{\rm mag}…
Probing the major driver of stellar population properties over sub-galaxy scales with SDSS MaNGA IFU spectroscopy
Ignacio Ferreras, Marina Trevisan, Ofer Lahav +2
Thanks to Integral Field Unit survey data it is possible to explore in detail the link between the formation of the stellar content in galaxies and the drivers of evolution. Tradit…
What drives the variance of galaxy spectra?
Zahra Sharbaf, Ignacio Ferreras, Ofer Lahav
We present a study aimed at understanding the physical phenomena underlying the formation and evolution of galaxies following a data-driven analysis of spectroscopic data based on…
Exploring the stellar populations of backsplash galaxies
Ignacio Ferreras, Asmus Böhm, Keiichi Umetsu +2
Backsplash galaxies are those that traverse and overshoot cluster cores as they fall into these structures. They are affected by environment, and should stand out in contrast to th…
A hydrodynamical study of outflows in starburst galaxies with different driving mechanisms
B. P. Brian Yu, Ellis R. Owen, Kinwah Wu +1
Outflows from starburst galaxies can be driven by thermal pressure, radiation and cosmic rays. We present an analytic phenomenological model that accounts for these contributions s…
Stellar populations of galaxies in the ALHAMBRA survey up to . III. The stellar content of the quiescent galaxy population during the last Gyr
L. A. Díaz-García, A. J. Cenarro, C. López-Sanjuan +27
We aim at constraining the stellar population properties of quiescent galaxies. These properties reveal how these galaxies evolved and assembled since up to the present ti…
Stellar populations of galaxies in the ALHAMBRA survey up to . II. Stellar content of quiescent galaxies within the dust-corrected stellar masscolour and the colourcolour diagrams
L. A. Díaz-García, A. J. Cenarro, C. López-Sanjuan +27
Our aim is to determine the distribution of stellar population parameters (extinction, age, metallicity, and star formation rate) of quiescent galaxies within the rest-frame stella…
IMF and [Na/Fe] abundance ratios from optical and NIR Spectral Features in Early-type Galaxies
F. La Barbera, A. Vazdekis, I. Ferreras +5
We present a joint analysis of the four most prominent sodium-sensitive features (NaD, NaI8190, NaI1.14, and NaI2.21), in the optical and Near-Infrared spectral range, of two nearb…
Radial constraints on the Initial Mass Function from TiO features and Wing-Ford band in Early-type Galaxies
F. La Barbera, A. Vazdekis, I. Ferreras +5
At present, the main challenge to the interpretation of variations in gravity-sensitive line strengths as driven by a non-universal initial mass function (IMF), lies in understandi…
Stellar populations of galaxies in the ALHAMBRA survey up to . I. MUFFIT: A Multi-Filter Fitting code for stellar population diagnostics
L. A. Díaz-García, A. J. Cenarro, C. López-Sanjuan +29
We present MUFFIT, a new generic code optimized to retrieve the main stellar population parameters of galaxies in photometric multi-filter surveys, and we check its reliability and…
Further evidence for a time-dependent initial mass function in massive early-type galaxies
I. Ferreras, C. Weidner, A. Vazdekis +1
Spectroscopic analyses of gravity-sensitive line strengths give growing evidence towards an excess of low-mass stars in massive early-type galaxies (ETGs). Such a scenario requires…