Explanipedia

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…

Estimating masses of supermassive black holes in active galactic nuclei from the H<i>α</i> emission line Open

E. Dalla Bontà, B. M. Peterson, C. J. Grier, M. Berton, W. N. Brandt , et al. · 2025

Aims. The goal of this project is to construct an estimator for the masses of supermassive black holes in active galactic nuclei (AGNs) based on the broad H α emission line. Methods. We made use of published reverberation mapping data. We …

Estimating Masses of Supermassive Black Holes in Active Galactic Nuclei from the Halpha Emission Line Open

E. Dalla Bontà, B. M. Peterson, C. J. Grier, M. Berton, W. N. Brandt , et al. · 2024

The goal of this project is to construct an estimator for the masses of supermassive black holes in active galactic nuclei (AGNs) based on the broad Halpha emission line. We make use of published reverberation mapping data. We remeasure al…

Near-infrared spectroscopic indices for unresolved stellar populations. III. Composite indices definition as age and metallicity tracers and model comparison Open

D. Gasparri, L. Morelli, Virginia Cuomo, V. D. Ivanov, A. Pizzella , et al. · 2024

Recent advances in the stellar population studies of unresolved galaxies in the NIR domain demonstrated that it contains several line-strength indices to be potentially used as diagnostics for stellar population properties. Reduction of th…

The dynamical state of bars in cluster dwarf galaxies: the cases of NGC 4483 and NGC 4516 Open

Virginia Cuomo, L. Morelli, J. A. L. Aguerri, E. M. Corsini, Victor P. Debattista , et al. · 2023

Dwarf barred galaxies are the perfect candidates for hosting slowly rotating bars. They are common in dense environments and have a relatively shallow potential well, making them prone to heating by interactions. When an interaction induce…

The dynamical state of bars in cluster dwarf galaxies: The cases of NGC 4483 and NGC 4516 Open

Virginia Cuomo, L. Morelli, J. A. L. Aguerri, E. M. Corsini, Victor P. Debattista , et al. · 2023

Dwarf barred galaxies are the perfect candidates for hosting slowly-rotating bars. They are common in dense environments and they have a relatively shallow potential well, making them prone to heating by interactions. When an interaction i…

Sverdrup-Henson crater: A candidate location for the first lunar South Pole settlement Open

Giovanni Leone, Caitlin Ahrens, J. Korteniemi, D. Gasparri, Ákos Keresztúri , et al. · 2023

A slow lopsided bar in the interacting dwarf galaxy IC 3167 Open

Virginia Cuomo, E. M. Corsini, L. Morelli, J. A. L. Aguerri, Yong‐Hyun Lee , et al. · 2022

We present surface photometry and stellar kinematics of IC 3167, a dwarf galaxy hosting a lopsided weak bar and infalling into the Virgo cluster. We measured the bar radius and strength from broad-band imaging and bar pattern speed by appl…

New binaries from the SHINE survey Open

M. Bonavita, R. Gratton, S. Desidera, V. Squicciarini, V. D’Orazi , et al. · 2022

We present the multiple stellar systems observed within the SpHere INfrared survey for Exoplanet (SHINE). SHINE searched for sub-stellar companions to young stars using high contrast imaging. Although stars with known stellar companions wi…

Near-infrared spectroscopic indices for unresolved stellar populations – II. Index measurements Open

D. Gasparri, L. Morelli, V. D. Ivanov, P. François, A. Pizzella , et al. · 2021

We measured the equivalent width of a large set of near-infrared (NIR, 0.8–2.4$\ \mu$m) line-strength indices in XShooter medium-resolution spectra of the central regions of 14 galaxies. We found that two aluminum indices, Al at 1.31 μm an…

Infrared Telescope Facility (IRTF) spectral library II: New indices in Y, J, H, and L atmospheric windows Open

L. Morelli, V. D. Ivanov, A. Pizzella, D. Gasparri, L. Coccato , et al. · 2020

Stellar population studies in the infrared (IR) wavelength range have two main advantages with respect to the optical regime: they probe different populations, because most of the light in the IR comes from redder and generally older stars…

The Infrared Telescope Facility (IRTF) spectral library Open

L. Morelli, V. D. Ivanov, A. Pizzella, D. Gasparri, L. Coccato , et al. · 2020

Context. Stellar population studies in the infrared (IR) wavelength range have two main advantages with respect to the optical regime: they probe different populations, because most of the light in the IR comes from redder and generally ol…

Exploring the R CrA environment with SPHERE Open

D. Mesa, M. Bonnefoy, R. Gratton, G. van der Plas, V. D’Orazi , et al. · 2019

Aims . R Coronae Australis (R CrA) is the brightest star of the Coronet nebula of the Corona Australis (CrA) star forming region. This star is very red in color, probably due to dust absorption, and is strongly variable. High-contrast inst…

Exploring the RCrA environment with SPHERE: Discovery of a new stellar companion Open

D. Mesa, M. Bonnefoy, R. Gratton, G. van der Plas, V. D’Orazi , et al. · 2019

Aims. R Coronae Australis (R CrA) is the brightest star of the Coronet nebula of the Corona Australis (CrA) star forming region. It has very red colors, probably due to dust absorption and it is strongly variable. High contrast instruments…

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