C. J. Walcher
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View article: The Calar Alto Legacy Integral Field Area survey: extended and remastered data release
The Calar Alto Legacy Integral Field Area survey: extended and remastered data release Open
This paper describes the extended data release (eDR) of the Calar Alto Legacy Integral Field Area (CALIFA) survey. It comprises science-grade quality data for 895 galaxies obtained with the Potsdam Multi Aperture Spectograph/PPak instrumen…
View article: ISM metallicity variations across spiral arms in disk galaxies: the impact of local enrichment and gas migration in the presence of radial metallicity gradient
ISM metallicity variations across spiral arms in disk galaxies: the impact of local enrichment and gas migration in the presence of radial metallicity gradient Open
Chemical abundance variations in the ISM provide important information about the galactic evolution, star-formation and enrichment histories. Recent observations of disk galaxies suggest that if large-scale azimuthal metallicity variations…
View article: ISM metallicity variations across spiral arms in disk galaxies
ISM metallicity variations across spiral arms in disk galaxies Open
Chemical abundance variations in the interstellar medium provide important information about the galactic evolution, star-formation, and enrichment histories. Recent observations of disk galaxies suggest that if large-scale azimuthal metal…
View article: The SAMI Galaxy Survey: the link between [α/Fe] and kinematic morphology
The SAMI Galaxy Survey: the link between [α/Fe] and kinematic morphology Open
We explore a sample of 1492 galaxies with measurements of the mean stellar population properties and the spin parameter proxy, $\lambda _{R_{\rm {e}}}$, drawn from the SAMI Galaxy Survey. We fit a global $[\alpha /\rm {Fe}]$–σ relation, fi…
View article: [alpha/Fe] traced by H II regions from the CALIFA survey. The connection between morphology and chemical abundance patterns
[alpha/Fe] traced by H II regions from the CALIFA survey. The connection between morphology and chemical abundance patterns Open
We thank the referee for his/her comments and suggestions. SFS and J.B.-B. thanks CONACYT for grants CB-285080 and FC-2016-01-1916, and PAPIIT-DGAPA-IN 100519 (UNAM) project. C.M. thanks UNAM/PAPIIT-IN 101220. J.B.-B. thanks IA-100420 (DGA…
View article: [<i>α</i>/Fe] traced by H II regions from the CALIFA survey
[<i>α</i>/Fe] traced by H II regions from the CALIFA survey Open
Context. Differential enrichment between α and Fe-peak elements is known to be strongly connected with the shape of the star formation history (SFH), the star formation efficiency (SFE), the inflow and outflow of material, and even the sha…
View article: Searching water megamasers by using mid-infrared spectroscopy (I): Possible mid-infrared indicators
Searching water megamasers by using mid-infrared spectroscopy (I): Possible mid-infrared indicators Open
Water megamasers at 22 GHz with a gas disc configuration in galaxies provide the most precise measurements of supermassive black hole masses, as well as independent constraints on the Hubble constant in the nearby universe. The existence o…
View article: FROM GLOBAL TO SPATIALLY RESOLVED IN LOW-REDSHIFT GALAXIES
FROM GLOBAL TO SPATIALLY RESOLVED IN LOW-REDSHIFT GALAXIES Open
Our understanding of the structure, composition and evolution of galaxies hasstrongly improved in the last decades, mostly due to new results based on large spectro-scopic and imaging surveys. In particular, the nature of ionized gas, its …
View article: THE SAMI GALAXY SURVEY: REVISITING GALAXY CLASSIFICATION THROUGH HIGH-ORDER STELLAR KINEMATICS
THE SAMI GALAXY SURVEY: REVISITING GALAXY CLASSIFICATION THROUGH HIGH-ORDER STELLAR KINEMATICS Open
Recent cosmological hydrodynamical simulations suggest that integral field spectroscopy can connect the high-order stellar kinematic moments h3 (~skewness) and h4 (~kurtosis) in galaxies to their cosmological assembly history. Here, we ass…
View article: The SAMI galaxy survey: exploring the gas-phase mass–metallicity relation
The SAMI galaxy survey: exploring the gas-phase mass–metallicity relation Open
We present a detailed exploration of the stellar mass versus gas-phase metallicity relation (MZR) using integral field spectroscopy data obtained from similar to 1000 galaxies observed by the SAMI galaxy survey. 'These spatially resolved s…
View article: Stellar populations and star formation histories of the nuclear star clusters in six nearby galaxies★
Stellar populations and star formation histories of the nuclear star clusters in six nearby galaxies★ Open
The majority of spiral and elliptical galaxies in the Universe host very\ndense and compact stellar systems at their centres known as nuclear star\nclusters (NSCs). In this work we study the stellar populations and star\nformation historie…
View article: Surface brightness fluctuation spectrum: a new probe of evolved stars in unresolved stellar populations
Surface brightness fluctuation spectrum: a new probe of evolved stars in unresolved stellar populations Open
The surface brightness fluctuation (SBF) method measures spatial fluctuations due to the most luminous stars in a galaxy. Besides being useful for distance measurements, it also provides diagnostic power to investigate the contribution of …
View article: A Combined Photometric And Kinematic Recipe For Evaluating The Nature Of Bulges Using The Califa Sample
A Combined Photometric And Kinematic Recipe For Evaluating The Nature Of Bulges Using The Califa Sample Open
Understanding the nature of bulges in disc galaxies can provide important insights into the formation and evolution of galaxies and their secular structures. For instance, the presence of a classical bulge suggests a relatively violent his…
View article: The origins of post-starburst galaxies at z < 0.05
The origins of post-starburst galaxies at z < 0.05 Open
Post-starburst galaxies can be identified via the presence of prominent Hydrogen Balmer absorption lines in their spectra. We present a comprehensive study of the origin of strong Balmer lines in a volume-limited sample of 189 galaxies wit…
View article: The SAMI Galaxy Survey: spatially resolving the main sequence of star formation
The SAMI Galaxy Survey: spatially resolving the main sequence of star formation Open
We present the ∼800 star formation rate maps for the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey based on H α emission maps, corrected for dust attenuation via the Balmer decrement, that are included in the SAM…
View article: Orbital decomposition of CALIFA spiral galaxies
Orbital decomposition of CALIFA spiral galaxies Open
Schwarzschild orbit-based dynamical models are widely used to uncover the internal dynamics of early-type galaxies and globular clusters. Here we present for the first time the Schwarzschild models of late-type galaxies: an SBb galaxy NGC …
View article: Observational hints of radial migration in disc galaxies from CALIFA
Observational hints of radial migration in disc galaxies from CALIFA Open
Context. According to numerical simulations, stars are not always kept at their birth galactocentric distances but they have a tendency to migrate. The importance of this radial migration in shaping galactic light distributions is still un…
View article: The spatially-resolved star formation histories of CALIFA galaxies: Implications for galaxy formation
The spatially-resolved star formation histories of CALIFA galaxies: Implications for galaxy formation Open
This paper presents the spatially resolved star formation history (SFH) of nearby galaxies with the aim of furthering our understanding of the different processes involved in the formation and evolution of galaxies. To this end, we apply t…
View article: The mass–metallicity relation revisited with CALIFA
The mass–metallicity relation revisited with CALIFA Open
We present an updated version of the mass--metallicity relation (MZR) using\nintegral field spectroscopy data obtained from 734 galaxies observed by the\nCALIFA survey. These unparalleled spatially resolved spectroscopic data allow\nus to …
View article: Resolving the age bimodality of galaxy stellar populations on kpc scales
Resolving the age bimodality of galaxy stellar populations on kpc scales Open
Galaxies in the local Universe are known to follow bimodal distributions in\nthe global stellar populations properties. We analyze the distribution of the\nlocal average stellar-population ages of 654,053 sub-galactic regions resolved\non …
View article: THE SAMI GALAXY SURVEY: REVISITING GALAXY CLASSIFICATION THROUGH HIGH-ORDER STELLAR KINEMATICS
THE SAMI GALAXY SURVEY: REVISITING GALAXY CLASSIFICATION THROUGH HIGH-ORDER STELLAR KINEMATICS Open
Recent cosmological hydrodynamical simulations suggest that integral field spectroscopy can connect the high-order stellar kinematic moments h3 (~skewness) and h4 (~kurtosis) in galaxies to their cosmological assembly history. Here, we ass…
View article: Arm and interarm abundance gradients in CALIFA spiral galaxies
Arm and interarm abundance gradients in CALIFA spiral galaxies Open
Spiral arms are the most singular features in disc galaxies. These structures can exhibit different patterns, namely grand design and flocculent arms, with easily distinguishable characteristics. However, their origin and the mechanisms sh…
View article: The dependence of oxygen and nitrogen abundances on stellar mass from the CALIFA survey
The dependence of oxygen and nitrogen abundances on stellar mass from the CALIFA survey Open
Context. The study of the integrated properties of star-forming galaxies is central to understand their formation and evolution. Some of these properties are extensive and therefore their analysis require totally covering and spatially res…
View article: Dominant dark matter and a counter-rotating disc: MUSE view of the low-luminosity S0 galaxy NGC 5102
Dominant dark matter and a counter-rotating disc: MUSE view of the low-luminosity S0 galaxy NGC 5102 Open
The kinematics and stellar populations of the low-mass nearby S0 galaxy NGC 5102 are studied from integral field spectra taken with the Multi-Unit Spectroscopic Explorer. The kinematic maps reveal for the first time that NGC 5102 has the c…
View article: Self-similarity in the chemical evolution of galaxies and the\n delay-time distribution of SNe Ia
Self-similarity in the chemical evolution of galaxies and the\n delay-time distribution of SNe Ia Open
\n Recent improvements in the age dating of stellar populations and single stars allow us to\n study the ages and abundance of stars and galaxies with unprecedented accuracy. We here\n compare the relation between age and α-element abundan…
View article: IMF shape constraints from stellar populations and dynamics from CALIFA
IMF shape constraints from stellar populations and dynamics from CALIFA Open
In this letter we describe how we use stellar dynamics information to\nconstrain the shape of the stellar IMF in a sample of 27 early-type galaxies\nfrom the CALIFA survey. We obtain dynamical and stellar mass-to-light ratios,\n$\\Upsilon_…
View article: Stellar kinematics across the Hubble sequence in the CALIFA survey: general properties and aperture corrections
Stellar kinematics across the Hubble sequence in the CALIFA survey: general properties and aperture corrections Open
We present the stellar kinematic maps of a large sample of galaxies from the integral-field spectroscopic survey CALIFA. The sample comprises 300 galaxies displaying a wide range of morphologies across the Hubble sequence, from ellipticals…
View article: The SAMI Galaxy Survey: spatially resolving the environmental quenching of star formation in GAMA galaxies
The SAMI Galaxy Survey: spatially resolving the environmental quenching of star formation in GAMA galaxies Open
We use data from the Sydney-AAO Multi-Object Integral Field Spectrograph Galaxy Survey and the Galaxy And Mass Assembly (GAMA) survey to investigate the spatially resolved signatures of the environmental quenching of star formation in gala…
View article: Nearby supernova host galaxies from the CALIFA survey II. Supernova environmental metallicity
Nearby supernova host galaxies from the CALIFA survey II. Supernova environmental metallicity Open
The metallicity of a supernova progenitor, together with its mass, is one of the main parameters that can rule the progenitor's fate. We present the second study of nearby supernova (SN) host galaxies (0.005 10 dex) by targeted searches. …
View article: CALIFA, the Calar Alto Legacy Integral Field Area survey
CALIFA, the Calar Alto Legacy Integral Field Area survey Open
This paper describes the third public data release (DR3) of the Calar Alto Legacy Integral Field Area (CALIFA) survey. Science-grade quality data for 667 galaxies are made public, including the 200 galaxies of the second public data releas…