A5058074217- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Adaptive optics and wavefront sensing
- Astronomical Observations and Instrumentation
- Spectroscopy and Laser Applications
- Gamma-ray bursts and supernovae
- Advanced Fluorescence Microscopy Techniques
- Astrophysics and Cosmic Phenomena
- Statistical and numerical algorithms
- Optical Polarization and Ellipsometry
- Plant Water Relations and Carbon Dynamics
- Remote Sensing in Agriculture
- CCD and CMOS Imaging Sensors
- Historical Education and Society
- Astro and Planetary Science
- Atmospheric and Environmental Gas Dynamics
- Astrophysical Phenomena and Observations
- Atmospheric Ozone and Climate
- Medical Imaging Techniques and Applications
- Spectroscopy and Chemometric Analyses
- Scientific Research and Discoveries
- History of Science and Medicine
- Yersinia bacterium, plague, ectoparasites research
Osservatorio Astronomico di Padova
2019-2025
Universidade Federal de Santa Catarina
2018-2022
Universidade de São Paulo
2019-2022
National Institute for Astrophysics
2022
Museu de Astronomia e Ciências Afins
2019-2021
Universidade Cidade de São Paulo
2021
We present the star formation histories of 39 galaxies with high quality rest-frame optical spectra at 0.5<z<1.3 selected to have strong Balmer absorption lines and/or break, and compare a sample spectroscopically quiescent same redshift. Photometric selection identifies majority objects that clear evidence for recent short-lived burst within last 1.5 Gyr, i.e. "post-starburst" galaxies, however we show good continuum are required obtain physical parameters such as mass fraction age. Dust...
ABSTRACT The Southern Photometric Local Universe Survey (S-PLUS) is an ongoing survey of ∼9300 deg2 in the southern sky a 12-band photometric system. This paper presents second data release (DR2) S-PLUS, consisting 514 tiles covering area 950 deg2. has been fully calibrated using new calibration technique suitable for generation wide-field multifilter surveys. consists χ2 minimization to fit synthetic stellar templates already from other surveys, eliminating need standard stars and reducing...
We investigate the impact of diffuse ionized gas (DIG) on abundance determinations in star-forming (SF) galaxies. The DIG is characterised using H$\alpha$ equivalent width ($W_{\text{H}\alpha}$). From a set 1,409 SF galaxies from Mapping Nearby Galaxies at APO (MaNGA) survey, we calculate fractional contribution to several emission lines high-$S/N$ data spaxels (instead noisy emission-lines DIG-dominated spaxels). Our method applicable spectra with observed $W_{\text{H}\alpha} \gtrsim 10$...
Abstract We present results from MUSE spatially resolved spectroscopy of 21 post-starburst galaxies in the centers eight clusters z ∼ 0.3 to 0.4. measure star formation histories (SFHs), time since quenching ( t Q ), and fraction stellar mass assembled past 1.5 Gyr μ ). The SFHs display a clear enhancement prior for 16 out objects, with at least 10% (and up >50%) being ranging less than 100 ∼800 Myr. By mapping , we analyze patterns galaxies. Most our sample have quenched their outside or...
Abstract Ram pressure stripping is a crucial evolutionary driver for cluster galaxies. It thought to be able accelerate the evolution of their star formation, trigger activity central active galactic nucleus (AGN) and interplay between environmental gas, eventually dissipate gas reservoirs. We explored outcomes ram by studying nonthermal radio emission jellyfish galaxy JW100 in A2626 ( z = 0.055), combining LOw Frequency Array, MeerKAT, Very Large Array observations from 0.144 5.5 GHz....
Ram pressure stripping has been proven to be effective in shaping galaxy properties dense environments at low redshift. The availability of MUSE observations a sample distant (z$\sim 0.3-0.5$) clusters allowed search for galaxies subject this phenomenon significant lookback times. In paper we describe how discovered and characterized 13 ram-pressure stripped the central regions two intermediate redshift (z$\sim$0.3-0.4) clusters, A2744 A370, using spectrograph. Emission line as well stellar...
This paper provides a catalogue of stars, quasars, and galaxies for the Southern Photometric Local Universe Survey Data Release 2 (S-PLUS DR2) in Stripe 82 region. We show that 12-band filter system (5 Sloan-like 7 narrow bands) allows better performance object classification than usual analysis based solely on broad bands (regardless infrared information). Moreover, we our is robust against missing values. Using spectroscopically confirmed sources retrieved from Sloan Digital Sky DR16...
Star-forming, H$\alpha$-emitting clumps are found embedded in the gaseous tails of galaxies undergoing intense ram-pressure stripping galaxy clusters, so-called jellyfish galaxies. These offer a unique opportunity to study star formation under extreme conditions, absence an underlying disk and within hot intracluster medium. Yet, comprehensive, high spatial resolution these systems is missing. We obtained UVIS/HST data observe first statistical sample disks six from GASP survey; we used...
Cluster galaxies are subject to the ram pressure exerted by intracluster medium, which can perturb or even strip away their gas while leaving stars undisturbed. We model distribution and kinematics of molecular in four late-type cluster (JO201, JO204, JO206, JW100), show tails atomic ionized indicative ongoing stripping. analyze MUSE@VLT data CO from ALMA searching for signatures radial flows, stripping, other perturbations. find that all galaxies, with possible exception JW100, host stellar...
We combine data from the Sloan Digital Sky Survey and Galaxy Evolution Explorer to simultaneously analyze optical spectra ultraviolet photometry of 231643 galaxies with STARLIGHT spectral synthesis code using state-of-the-art stellar population models. present a new method estimate GALEX in SDSS spectroscopic aperture, which proves quite reliable if applied large samples. In agreement previous experiments CALIFA, we find that adding UV constraints leads moderate increase on fraction $\sim...
The mass function (MF) of young stellar clumps ( 200,Myr) is an indicator the mechanism driving collapse interstellar medium (ISM) into giant molecular clouds. Typically, MF in main-sequence galaxies described by a power law (dN/dM_*∝ -α ) with slope α=2, hinting that driven turbulence. To understand whether local environment affects star formation, we modelled clump six cluster galaxies, from GASP survey, undergoing strong ram-pressure stripping (RPS). This phenomenon, exerted hot and...
Abstract The chemical evolution of galaxies is shaped by their star formation histories and the exchange gas with environments. Metallicity provides key insights into these processes, reflecting interplay between flows. A fundamental aspect this mass–metallicity relation, which captures strong correlation a galaxy stellar mass (M⋆) its gas-phase oxygen abundance. In study, we use MUSE observations to analyze star-forming disc in 12 clusters within redshift range 0.3 &lt; z 0.5. Galaxies...
Exploiting broad- and narrow-band images of the Hubble Space Telescope from near-UV to I-band rest frame, we study star-forming clumps six galaxies GASP sample undergoing strong ram pressure stripping. Clumps are detected in H alpha near-UV, tracing star formation on different timescales. We consider located galaxy disks stripped tails formed gas but still close disk, called extraplanar. detect 2406 alpha-selected (1708 disks, 375 extraplanar regions, 323 tails) 3745 UV-selected (2021 825...
Context . The Southern Photometric Local Universe Survey (S-PLUS) is a project to map ~9300 sq deg of the sky using twelve bands (seven narrow and five broadbands). Observations are performed with T80-South telescope, robotic telescope located at Cerro Tololo Observatory in Chile. survey footprint consists several large contiguous areas, including fields high low galactic latitudes, towards Magellanic Clouds. S-PLUS uses fixed exposure times reach point source depths about 21 mag 𝑔 ri ɀ 20 u...
ABSTRACT Stellar population studies of early-type galaxies (ETGs) based on their optical stellar continuum suggest that these are quiescent systems. However, emission lines and ultraviolet photometry reveal a diverse population. We use new version the starlight spectral synthesis code state-of-the-art models to simultaneously fit Sloan Digital Sky Survey spectra Galaxy Evolution Explorer for sample 3453 at z &lt; 0.1 with near (NUV) − r &gt; 5 classified as elliptical by Zoo....
Abstract The diffuse ionized gas (DIG) is an important component of the interstellar medium, and it can be affected by many physical processes in galaxies. Measuring its distribution contribution emission allows us to properly study both ionization star formation Here, we measure for first time DIG 38 gas-stripped galaxies local clusters drawn from GAs Stripping Phenomena with MUSE survey (GASP). These are at different stages stripping. We also compare properties those 33 normal same survey....
Abstract Diffuse ionized gas (DIG) is an important component of the interstellar medium that can provide insights into different physical processes affecting in galaxies. We utilize optical IFU observations 71 gas-stripped and control galaxies from Gas Stripping Phenomena (GASP) survey, to analyze properties dense DIG, such as metallicity, ionization parameter log( q ), difference between measured log[O i ]/H α value predicted by star-forming models given iii β (Δ ). compare these at spatial...
ABSTRACT The H α and β emission-line luminosities measured in a single integrated spectrum are affected non-trivial ways by point-to-point variations dust attenuation galaxy. This work investigates the impact of this variation when estimating global corrected for presence Balmer decrement. Analytical arguments show that dust-corrected luminosity is always underestimated using α/H flux ratio to correct attenuation. We measure effect on 156 face-on star-forming galaxies from Mapping Nearby...
ABSTRACT We investigate how the ageing of stellar populations can drive a morphological transformation in galaxies whose star formation (SF) activity has been quenched on short time-scales, like cluster subject to ram pressure stripping from intracluster medium. For this purpose, we use sample 91 with MUSE data GAs Stripping Phenomena (GASP) programme and their spatially resolved SF history derived spectral modelling software sinopsis. simulate future continuation activities by exploring two...
Abstract We present the first systematic study of stellar populations ultra-diffuse galaxies (UDGs) in field, integrating large area search and characterization UDGs by SMUDGes survey with twelve-band optical photometry S-PLUS survey. Based on Bayesian modeling colors UDGs, we determine ages, metallicities, masses 100 distributed an ∼330 deg 2 Stripe 82 region. find that metallicities field are similar to those observed clusters follow trends previously defined studies dwarf giant galaxies....
A detailed study of the morphology lenticular galaxies is an important way to understand how this type galaxy formed and evolves over time. Decomposing a into its components (disc, bulge, bar, ...) allows recovering colour gradients present in each system, star formation history, assembly history. We use GALFITM perform multi-wavelength structural decomposition closest galaxy, NGC 3115, resulting description stellar light several main components: thin disc, thick disc also evidence bar....
ABSTRACT We present tests of a new method to simultaneously estimate stellar population and emission-line (EL) properties galaxies out the Southern Photometric Local Universe Survey (S-PLUS) photometry. The technique uses AlStar code, updated with an empirical prior that greatly improves its ability ELs using only survey’s 12 bands. compare output (noise-perturbed) synthetic photometry Sloan Digital Sky (SDSS) derived from previous full spectral fitting detailed EL analysis. For realistic...
Context. The main sequence (MS) of star-forming galaxies (SFGs) is the tight relation between galaxy stellar mass ( M ⋆ ) and its star formation rate (SFR) was observed up to z ∼ 6. MS can be used as a reference for understanding differences among galaxies, which are characterised by different rates production (starbursts, SFGs, passive galaxies), those inside that made components (bulge, disk, halo). To investigate peculiar features found in our sample more depth, we focus here on their...
Extraplanar tails of ionized-stripped gas, extending up to several tens kiloparsecs beyond the stellar disk, are often observed in ram-pressure-stripped (RPS) galaxies low-redshift clusters. Recent studies have also identified similar at high redshifts, and we present here first analysis chemical composition such local Universe. Specifically, examined distribution ionized gas metallicity RPS Abell 2744 ( z = 0.308) 370 0.375) clusters as part MUSE-GTO program. We investigated spatially...
This paper presents the first public data release of S-PLUS Ultra-Short Survey (USS), a photometric survey with short exposure times, covering approximately 9300 deg$^{2}$ Southern sky. The USS utilizes Javalambre 12-band magnitude system, including narrow and medium-band broad-band filters targeting prominent stellar spectral features. primary objective is to identify bright, extremely metal-poor (EMP; [Fe/H] $\leq -3$) ultra (UMP; -4$) stars for further analysis using medium-...