A5016176909- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Remote Sensing in Agriculture
- Advanced Vision and Imaging
- Cosmology and Gravitation Theories
- Salmonella and Campylobacter epidemiology
- Impact of Light on Environment and Health
- Astrophysics and Star Formation Studies
- Scientific Research and Discoveries
- Science, Technology, and Education in Latin America
- Advanced Fluorescence Microscopy Techniques
- Journalism and Media Studies
- Adaptive optics and wavefront sensing
- Plant Water Relations and Carbon Dynamics
- Communication and COVID-19 Impact
- Solidification and crystal growth phenomena
- Astrophysical Phenomena and Observations
- Educational methodologies and cognitive development
- Veterinary Practice and Education Studies
- Material Science and Thermodynamics
- Climate Change Communication and Perception
- Advanced Image Processing Techniques
- Listeria monocytogenes in Food Safety
- Sports Dynamics and Biomechanics
Instituto de Astronomía Teórica y Experimental
2015-2024
Argentine National Observatory
2015-2024
Universidad Nacional de Córdoba
2016-2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2015-2024
Universidad Nacional del Centro de la Provincia de Buenos Aires
2024
National Agricultural Technology Institute
2017-2018
Instituto Nacional de Investigación Agropecuaria
2017-2018
Universidad de Concepción del Uruguay
2018
Centro Científico Tecnológico - San Juan
2016
The large-scale linear halo bias encodes the relation between clustering of dark-matter (DM) halos and that underlying matter density field. Although primary dependence on mass is well understood in context structure formation, physical origins multiple additional relations at fixed mass, commonly known as secondary bias, have not been fully elucidated. Of particular relevance assembly history, bias. Our goal to determine whether properties initial regions from which z=0 originate produce...
We use the improved IllustrisTNG300 magneto-hydrodynamical cosmological simulation to revisit effect that secondary halo bias has on clustering of central galaxy population. With a side length 205 $h^{-1}$Mpc and significant improvements sub-grid model with respect previous Illustris boxes, allows us explore dependencies over large volume wide halo-mass range. show, at high statistical significance, assembly signal (i.e., dependence formation redshift) manifests itself population when this...
Context. Galaxy groups provide the means for a great diversity of studies that contribute to better understanding structure universe on large scale and allow properties galaxies be linked those host halos. However, identification galaxy systems is challenging task therefore it necessary improve techniques involved as much possible. Aims. In view present forthcoming catalogues, we propose, implement, evaluate an algorithm combines two most popular used identify systems. The can easily applied...
The environment within dark matter haloes can quench the star formation of galaxies. However, environmental effects beyond virial radius ($\gtrsim$ 1 Mpc) are less evident. An example is debated correlation between colour or in central galaxies and neighbour adjacent at large separations several Mpc, referred to as two-halo galactic conformity. We use two galaxy catalogues generated from different versions semi-analytic model SAG applied MDPL2 cosmological simulation IllustrisTNG300...
ABSTRACT For low-mass haloes (i.e. Mhalo ≲ 1013 h−1 M⊙), the physical origins of halo assembly bias have been linked to slowdown accretion due tidal forces, which are more dominant in some cosmic-web environments as compared others. Here, we use publicly available data from application Discrete Persistent Structures Extractor (DisPerSE) IllustrisTNG magnetohydrodynamical simulation investigate dependence related galaxy effect on cosmic web. We show that, at fixed mass, population displays...
Abstract The large-scale environment of the cosmic web is believed to impact galaxy evolution, but there still no consensus regarding mechanisms. We use a semi-analytic model (SAM) catalog study star formation and dust content local galaxies in different environments web—namely voids, filaments, walls, nodes. find strong only for with M stars ≲ 10 10.8 ⊙ : less dense environment, larger rate at fixed stellar mass. This attributed fact that typically feature younger populations, slower...
In this work, we combine size and stellar mass measurements from the Sloan Digital Sky Server (SDSS) with group finder algorithm of Rodriguez \& Merch\'an in order to determine halo -- relations central satellite galaxies separately. We show that, while display similar relations, their differ significantly. As expected, more massive haloes tend host larger galaxies. However, depends only slightly on virial mass. that these results are compatible a remarkably simple model which scales as...
Galaxies in cosmic voids have been reported with properties related to a delayed evolution respect the Universe general. These characteristics reflect interaction of galaxies environment. However, it is not clear degree influence large-scale structure on void or, if these are only influenced by low local density around them typical regions. In this article we identified SDSS-DR16 and studied various galaxies, such as g-r colour, star formation rate, concentration. To characterise...
In this paper, we use photometric data from the S-PLUS DR4 survey to identify isolated galaxy pairs and analyse their characteristics properties. Our results align with previous spectroscopic studies, particularly in luminosity function parameters, suggesting a consistent trait among systems. findings reveal high fraction of red galaxies across all samples, irrespective projected distance, velocity difference, or ratio. We found that proximity neighbour its central influences colour due...
ABSTRACT The standard paradigm for the formation of Universe suggests that large structures are formed from hierarchical clustering by continuous accretion less massive galaxy systems through filaments. In this context, filamentary play an important role in properties and evolution galaxies connecting high-density regions, such as nodes, being surrounded low-density cosmic voids. availability filament critical point catalogues extracted disperse illustris TNG300-1 hydrodynamic simulation...
ABSTRACT In this work, we combine ellipticity and major axis position angle measurements from the Sloan Digital Sky Server Data Release 16 with group finder algorithm of Rodriguez & Merchán to determine alignment central galaxies surrounding structures satellite lying in their group. We use two independent methods: a modified version two-point cross-correlation function between galaxy orientation relative position. The first method allows us study inner outer regions cluster, while...
Context.Halo occupation distribution (HOD) is a powerful statistic that allows the study of several aspects matter in Universe, such as evaluating semi-analytic models galaxy formation or imposing constraints on cosmological models.Consequently, it important to have reliable method for estimating this statistic, taking full advantage available information current and future surveys.Aims.The main goal project combine photometric spectroscopic using discount background galaxies order extend...
Evidence shows properties of dark matter haloes may vary with large-scale environment. By studying the halo occupation distribution in cosmic voids it is possible to obtain useful information that can shed light on subject. The history formation and galaxies residing these regions likely differ from global behaviour given their extreme We use two public access simulated galaxy catalogues constructed different methods: a semi-analytical model hydrodynamic simulation. In both, we identify...
Recent works have shown that the properties of galaxy populations in dark matter halos vary with large-scale environments. These results suggest a variation halo occupation distribution (HOD) extreme density To analyse these effects, we identify cosmic voids and future virialised structures (FVS) SDSS-DR12 estimate HOD within superstructures using group catalogues as proxies. Our goal is to use observational data characterise FVS, explore different galaxies compare them general outside...
ABSTRACT Satellite galaxies undergo a variety of physical processes when they are accreted by groups and clusters, often resulting in the loss baryonic dark matter (DM) mass. In this work, we evaluate predictions from IllustrisTNG hydrodynamical simulation regarding evolution content satellites, focusing on population that at z > 1 retain their identity as satellites down to = 0. At fixed host halo mass, amount DM stellar mass stripped depends mostly pericentric distance, dperi, here...
Context. Studies of galaxy pairs can provide valuable information to jointly understand the formation and evolution galaxies groups. Consequently, taking into account new high precision photo-z surveys, it is important have reliable tested methods that allow us properly identify these systems estimate their total masses other properties. Aims. In view forthcoming Physics Accelerating Universe Survey (PAUS) we propose evaluate performance an identification algorithm projected close isolated...
ABSTRACT Motivated by observational results, we use IllustrisTNG hydrodynamical numerical simulations to study the alignment of central galaxies in groups with surrounding structures. This approach allows us analyse galaxy and group properties not available observations. To perform this analysis, a modified version two-point cross-correlation function measure angle between semimajor axes larger Overall, our results reproduce ones, as find large-scale anisotropy, which is dominated red...
ABSTRACT Galaxy pairs constitute the initial building blocks of galaxy evolution, which is driven through merger events and interactions. Thus, analysis these systems can be valuable in understanding evolution studying structure formation. In this work, we present a new publicly available catalogue close identified using photometric redshifts provided by Physics Accelerating Universe Survey (PAUS). To efficiently detect them, take advantage high-precision photo−z (σ68 < 0.02) apply an...
Galaxy group masses are important to relate these systems with the dark matter halo hosts. However, deriving accurate mass estimates is particularly challenging for low-mass galaxy groups. Moreover, calibration of bservational mass-proxies using weak-lensing have been mainly focused on massive clusters. We present here a study sample groups identified according spectroscopic catalogue, spanning wide range. The main motivation our analysis assess provided by catalogue derived through an...
We study the mass-richness relation using galaxy catalogues and images from Sloan Digital Sky Survey. use two independent methods, in first one, we calibrate scaling with weak-lensing mass estimates. In second procedure apply a background subtraction technique to derive probability distribution, $P(M \mid N)$, that groups $N$-members have virialized halo $M$. Lensing masses are derived different richness bins for systems sets: maxBCG catalogue based on group finder algorithm developed by...
PURPOSE: To determine a jumping profile of elite volleyball male players by field positions during competitive season. METHODS: 12 Argentine professional (age: 28.6 ± 5.4 yrs, weight: 92.4 8.8 kg, height: 192.0 8.3 cm.) were studied whole competition phase (59 matches in 36 weeks). Video recordings taken from the back court and all stored digitally to determine: 1) frequency jumps per player who grouped according 4 positions: setter (SE), wing attacker (WA), middle blocker (MB) receptor...
This study was conducted to estimate the apparent prevalence of Salmonella spp. in birds kept under backyard system Entre Ríos, Argentina, and determine performance two selective plating media used for isolation, antimicrobial resistance isolated. Also, association farms characteristics with presence evaluated. A total 657 chickens 15 gooses were sampled one time by cloacal swab, belonging 51 family farms, respectively, four counties Rios state from April 2014 May 2015. Only samples belonged...
Here we analyze a sample of close galaxy pairs (relative projected separation < 25 h −1 kpc and relative radial velocities 350 km s ) using weak-lensing analysis based on the Canada-France-Hawaii Telescope Stripe 82 Survey (CS82). We determine halo masses for total as well interacting, red, higher-luminosity pair subsamples with ∼3 σ confidence. The derived lensing signal can be fitted either by Singular Isothermal Sphere (SIS) V = 223 ± 24 or Navarro–Frenk–White (NFW) profile R 200 0.30...
The present study was conducted to estimate the apparent prevalence of Salmonella spp. in free-ranging waterfowl that inhabitant Entre Ríos, Argentina, determine antimicrobial resistance isolated, and compare performance two selective plating media used for isolation. Five hundred ninety nine free-living were sampled one time by cloacal swab from April 2014 July 2016. Only 6 samples belonged all counties positive spp., so 1%. Four serovars isolated (Salmonella ser. Typhimurium, S....
There are hints suggesting that properties of galaxy populations in dark matter haloes may depend on their large-scale environment. Recent works point out very low-density environments influence halo occupation distribution (HOD), however there is not a similar analysis focused high-density environments. Here we use simulated set future virialized superstructures (FVS) to analyse the galaxies within these high globally dense regions. We publicly available constructed with semi-analytical...