Explanipedia

The role of supercluster filaments in shaping galaxy clusters Open

Raúl Baier-Soto, Yara L. Jaffé, A. Finoguenov, Paul Haines, P. Merluzzi , et al. · 2025

In a hierarchical ΛCDM Universe, cosmic filaments serve as the primary channels for matter accretion into galaxy clusters, influencing the shape of their dark matter halos. We investigate whether the elongation of galaxy clusters correlate…

Targeting cluster galaxies for the 4MOST CHANCES Low-z sub-survey with photometric redshifts Open

Antonela Monachesi, Raúl Baier-Soto, C. R. Bom, R. F. Haack, Franco Piraino-Cerda , et al. · 2025

The evolution of galaxies is shaped by both internal processes and their external environments. Galaxy clusters and their surroundings provide ideal laboratories to study these effects, particularly mechanisms such as quenching and morphol…

Assessing the connection between galactic conformity and assembly-type bias Open

Ivan Lacerna, Nelson Padilla, Daniela Palma · 2025

Context. Galaxies across the Universe display a conformity in the fraction of quenched galaxies out to large distances, which is much greater around quenched central galaxies than it is for star-forming ones. On the other hand, simulations…

Visual morphological classification of the full MaNGA DR17 sample: a general characterization Open

J. A. Vázquez-Mata, H. M. Hernández-Toledo, V. Ávila-Reese, Aldo Rodríguez-Puebla, Luis A. Martínez , et al. · 2025

We present the MaNGA (Mapping Nearby Galaxies at Apache Point Observatory) Visual Morphology (MVM) catalogue, featuring a visual morphological classification of 10 059 galaxies in the final MaNGA sample. By combining SDSS (Sloan Digital Sk…

Visual morphological classification of the full MaNGA DR17 sample: a general characterization Open

J. A. Vázquez-Mata, H. M. Hernández-Toledo, V. Ávila-Reese, A. Rodríguez-Puebla, Luis A. Martínez , et al. · 2025

We present the MaNGA Visual Morphology (MVM) catalogue, featuring a visual morphological classification of 10,059 galaxies in the final MaNGA sample. By combining SDSS and DESI Legacy Survey (DLS) images, we classified galaxies into 13 Hub…

SDSS-V black hole mapper: the index diagram as a tool to disentangle the influence of the host galaxy in quasar spectra Open

C. A. Negrete, Rodrigo Sandoval-Orozco, Héctor J. Ibarra-Medel, B I Tapia-Benavides, Roberto J. Assef , et al. · 2025

We revisit the Quasar Main Sequence (QMS) by investigating the impact of the stellar component from the host galaxy (HG) on the emission line spectra of the active galactic nuclei (AGNs). We first detect spectra with broad emission lines u…

Spatially resolved near-infrared spectroscopic indices for the massive elliptical galaxy IC 4296 Open

L. Morelli, D. Gasparri, Virginia Cuomo, V. D. Ivanov, A. Pizzella , et al. · 2025

Context. In the near-infrared (NIR) region, a large number of absorption features may be used to constrain the properties of unresolved stellar populations of galaxies. Aims. We present the results of a pilot project assessing the feasibil…

Assessing the connection between galactic conformity and assembly-type bias Open

Ivan Lacerna, Nelson Padilla, Daniela Palma · 2025

Context. Galaxies in the Universe show a conformity in the fraction of quenched galaxies out to large distances, being much larger around quenched central galaxies than for star-forming ones. On the other hand, simulations have shown that …

Abell548: A rich cluster of galaxies in the making Open

H. Quintana, Dominique Proust, Ivan Lacerna, Hans Böhringer, Gayoung Chon · 2025

We performed an in-depth study of the complex structure of the galaxy cluster A548, based on 108 spectroscopic galaxy velocities reported in this paper. This analysis includes 80 new redshifts, along with velocity data from the literature …

The evolution of low-mass central galaxies in the vicinity of massive structures and its impact on the two-halo conformity Open

Daniela Palma, Ivan Lacerna, M. Celeste Artale, Antonio D. Montero-Dorta, Andrés N. Ruiz , et al. · 2024

We investigated the population of low-mass central galaxies with M ⋆ = 10 9.5 − 10 10 h −1 M ⊙ , inhabiting regions near massive groups and clusters of galaxies using the IllustrisTNG300 and MDPL2-SAG simulations. We set out to study their…

An iterative method to deblend AGN-Host contributions for Integral Field spectroscopic observations Open

Héctor J. Ibarra-Medel, C. A. Negrete, Ivan Lacerna, H. M. Hernández-Toledo, Edgar Cortes-Suárez , et al. · 2024

We present a new iterative deblending method to separate the host galaxy (HG) and their Active Galactic Nuclei (AGNs) emission with the use of Integral Field spectroscopic (IFS) data. The method decomposes the resolved HG emission from the…

An iterative method to deblend AGN-Host contributions for Integral Field spectroscopic observations Open

Héctor J. Ibarra-Medel, C. A. Negrete, Ivan Lacerna, Héctor Manuel Hernández-Toledo, Edgar Cortes-Suárez , et al. · 2024

We present a new iterative deblending method to separate the host galaxy (HG) and their Active Galactic Nuclei (AGN) emission with the use of Integral Field spectroscopic (IFS) data. The method decomposes the resolved HG emission from the …

The evolution of low-mass central galaxies in the vicinity of massive structures and its impact on the two-halo conformity Open

Daniela Palma, Ivan Lacerna, M. Celeste Artale, Antonio D. Montero-Dorta, Andrés N. Ruiz , et al. · 2024

We investigated the population of low-mass central galaxies with Mstar = $10^{9.5}-10^{10}$ Msun/h, inhabiting regions near massive groups and clusters of galaxies using the TNG300 and MDPL2-SAG simulations. We set out to study their evolu…

The Eighteenth Data Release of the Sloan Digital Sky Surveys: Targeting and First Spectra from SDSS-V Open

Andrés Almeida, Scott F. Anderson, M. Argudo–Fernández, Carles Badenes, Kathleen A. Barger , et al. · 2023

The eighteenth data release (DR18) of the Sloan Digital Sky Survey (SDSS) is the first one for SDSS-V, the fifth generation of the survey. SDSS-V comprises three primary scientific programs or “Mappers”: the Milky Way Mapper (MWM), the Bla…

SDSS-IV MaNGA: The Effect of Stellar Mass and Halo Mass on the Assembly Histories of Satellite Galaxies Open

Grecco A. Oyarzún, Kevin Bundy, Kyle B. Westfall, Ivan Lacerna, Renbin Yan , et al. · 2023

We combine an unprecedented MaNGA sample of over 3000 passive galaxies in the stellar mass range 10 9 –10 12 M ⊙ with the Sloan Digital Sky Survey group catalog by Tinker to quantify how central and satellite formation, quantified by radia…

SDSS-IV MaNGA: The effect of stellar mass and halo mass on the assembly histories of satellite galaxies Open

Grecco A. Oyarzún, Kevin Bundy, Kyle B. Westfall, Ivan Lacerna, Renbin Yan , et al. · 2023

We combine an unprecedented MaNGA sample of over 3,000 passive galaxies in the stellar mass range 10^{9}-10^{12} Msun with the Sloan Digital Sky Survey group catalog by Tinker to quantify how central and satellite formation, quantified by …

The Eighteenth Data Release of the Sloan Digital Sky Surveys: Targeting and First Spectra from SDSS-V Open

Andrés Almeida, Scott F. Anderson, M. Argudo–Fernández, Carles Badenes, Kathleen A. Barger , et al. · 2023

The eighteenth data release of the Sloan Digital Sky Surveys (SDSS) is the first one for SDSS-V, the fifth generation of the survey. SDSS-V comprises three primary scientific programs, or "Mappers": Milky Way Mapper (MWM), Black Hole Mappe…

A Comparative Analysis of the Chemical Compositions of Gaia-Enceladus/Sausage and Milky Way Satellites using APOGEE Open

Laura L. Fernandes, Andrew C. Mason, Danny Horta, Ricardo P. Schiavon, Christian R. Hayes , et al. · 2023

We use data from the 17th data release of the Apache Point Observatory Galactic Evolution Experiment (APOGEE 2) to contrast the chemical composition of the recently discovered Gaia Enceladus/Sausage system (GE/S) to those of ten Milky Way …

The H <span>i</span> content of red geyser galaxies Open

Emily Frank, David V. Stark, Karen L. Masters, Namrata Roy, Rogério Riffel , et al. · 2022

Red geysers are a specific type of quiescent galaxy, denoted by twin jets emerging from their galactic centres. These bisymmetric jets possibly inject energy and heat into the surrounding material, effectively suppressing star formation by…

The HI Content of Red Geyser Galaxies Open

Emily Frank, David V. Stark, Karen L. Masters, Namrata Roy, Rogério Riffel , et al. · 2022

Red geysers are a specific type of quiescent galaxy, denoted by twin jets emerging from their galactic centers. These bisymmetric jets possibly inject energy and heat into the surrounding material, effectively suppressing star formation by…

A comparative analysis of the chemical compositions of Gaia-Enceladus/Sausage and Milky Way satellites using APOGEE Open

Laura L. Fernandes, Andrew C. Mason, Danny Horta, Ricardo P. Schiavon, Christian R. Hayes , et al. · 2022

We use data from the 17th data release of the Apache Point Observatory Galactic Evolution Experiment (APOGEE 2) to contrast the chemical composition of the recently discovered Gaia Enceladus/Sausage system (GE/S) to those of 10 Milky Way (…

Infrared variability of young solar analogues in the Lagoon Nebula Open

C Ordenes-Huanca, M. Zoccali, A. Bayo, Jorge Cuadra, R. Contreras Ramos , et al. · 2022

T Tauri stars are low-mass pre-main sequence stars that are intrinsically variable. Due to the intense magnetic fields they possess, they develop dark spots on their surface that, because of rotation, introduce a periodic variation of brig…

New insights into the Triangulum Australis supercluster of galaxies Open

H. Quintana, Dominique Proust, Ivan Lacerna, Hans Böhringer · 2022

The Triangulum Australis cluster is one of about a dozen nearby massive cluster systems which contribute to the gravitational pull behind the so-called Great Attractor that is dominated by the nearby Shapley Supercluster mass, which confor…

SDSS-IV MaNGA: How the Stellar Populations of Passive Central Galaxies Depend on Stellar and Halo Mass Open

Grecco A. Oyarzún, Kevin Bundy, Kyle B. Westfall, Jeremy L. Tinker, Francesco Belfiore , et al. · 2022

We analyze spatially resolved and co-added SDSS-IV MaNGA spectra with signal-to-noise ratio ∼100 from 2200 passive central galaxies ( z ∼ 0.05) to understand how central galaxy assembly depends on stellar mass ( M * ) and halo mass ( M h )…

SDSS-IV MaNGA: Identification and multiwavelength properties of Type-1 AGN in the DR15 sample Open

Edgar Cortes-Suárez, C. A. Negrete, H. M. Hernández-Toledo, Héctor J. Ibarra-Medel, Ivan Lacerna · 2022

We present a method to identify type-1 active galactic nuclei (AGNs) in the central 3 arcsec integrated spectra of galaxies in the MaNGA DR15 sample. It is based on flux ratios estimates in spectral bands flanking the expected h α broad co…

SDSS-IV MaNGA: How the stellar populations of passive central galaxies\n depend on stellar and halo mass Open

Grecco A. Oyarzún, Kevin Bundy, Kyle B. Westfall, Jeremy L. Tinker, Francesco Belfiore , et al. · 2022

We analyze spatially resolved and co-added SDSS-IV MaNGA spectra with\nsignal-to-noise ~100 from 2200 passive central galaxies (z~0.05) to understand\nhow central galaxy assembly depends on stellar mass (M*) and halo mass (Mh). We\ncontrol…

On the environmental influence of groups and clusters of galaxies beyond the virial radius: Galactic conformity at few Mpc scales Open

Ivan Lacerna, Facundo Rodríguez, Antonio D. Montero-Dorta, Ana Laura O’Mill, S. A. Cora , et al. · 2022

The environment within dark matter haloes can quench the star formation of galaxies. However, environmental effects beyond the virial radius of haloes (≳1 Mpc) are less evident. An example is the debated correlation between colour or star …

SDSS IV MaNGA: visual morphological and statistical characterization of the DR15 sample Open

J. A. Vázquez-Mata, H. M. Hernández-Toledo, V. Ávila-Reese, M. Herrera-Endoqui, Aldo Rodríguez-Puebla , et al. · 2022

We present a detailed visual morphological classification for the 4614 MaNGA galaxies in SDSS Data Release 15, using image mosaics generated from a combination of r band (SDSS and deeper DESI Legacy Surveys) images and their digital post-p…

The differences between mass- and light-derived structural parameters over time for MaNGA elliptical galaxies Open

Héctor J. Ibarra-Medel, V. Ávila-Reese, Ivan Lacerna, Aldo Rodríguez-Puebla, J. A. Vázquez-Mata , et al. · 2021

We apply stellar population synthesis analysis to obtain spatially resolved archaeological inferences for a large sample of ‘red and dead’ Elliptical galaxies (Classical Ellipticals, CLEs) from the MaNGA/SDSS-IV DR15 survey. From their 2D …

APOGEE Chemical Abundance Patterns of the Massive Milky Way Satellites Open

Sten Hasselquist, Christian R. Hayes, Jianhui Lian, David H. Weinberg, Gail Zasowski , et al. · 2021

The SDSS-IV Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey has obtained high-resolution spectra for thousands of red giant stars distributed among the massive satellite galaxies of the Milky Way (MW): the Large and …

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