48 citations · 461 across the 30 of their papers we have counts for
31 papers
Merger remnant in TXS 1033+026 - I: and HI 21-cm observations suggest counter-rotating gas
J. N. H. S. Aditya, Hyein Yoon, L. G. Dahmer-Hahn +5
We conducted eMERLIN and Gemini integral field unit (IFU) observations towards TXS 1033+026, a post-merger ultraluminous infrared galaxy, to study the radio continuum and …
Prevailing thermally-pulsing-asymptotic-giant branch stars in the near-infrared rest-frame spectra of distant quiescent galaxies: towards robust galaxy ages and masses
Shiying Lu, Emanuele Daddi, Claudia Maraston +12
We recently reported the discovery of prominent features from the thermally pulsing asymptotic-giant-branch (TP-AGB) phase in the rest-frame near-infrared of a massive quiescent ga…
The size of the Coronal Line Region in Active Galactic Nuclei: a MUSE perspective
A. Rodríguez-Ardila, M. A. Fonseca-Faria, L. G. Dahmer-Hahn +3
We investigated by means of MUSE/VLT observations the true size of the coronal line region (CLR) in a local sample of nine active galactic nuclei known for displaying prominent cor…
Extragalactic globular cluster near-infrared spectroscopy: II. The stellar population synthesis model zero-point problem extends to the near-infrared
E. Eftekhari, A. Vazdekis, R. Riffel +5
Many recent studies have pointed out significant discrepancies between observations and models of stellar populations in the near-infrared (NIR). With current and future observing…
Extragalactic globular cluster near-infrared spectroscopy: I. Integrated near-infrared spectra of Centaurus A/NGC 5128
L. G. Dahmer-Hahn, A. L. Chies-Santos, E. Eftekhari +6
One way to constrain the evolutionary histories of galaxies is to analyse their stellar populations. In the local Universe, our understanding of the stellar population properties o…
Capivara: A Spectral-based Segmentation Method for IFU Data Cubes
Rafael S. de Souza, Luis G. Dahmer-Hahn, Shiyin Shen +7
We present capivara, a fast and scalable spectral-based segmentation package designed to study astrophysical properties within distinct structural components of galaxies. This spec…
Spatially-resolved gas-phase metallicity in Seyfert galaxies
Mark Armah, Rogério Riffel, L. G. Dahmer-Hahn +7
We explore the relations between the gas-phase metallicity radial profiles (few hundred inner parsec) and multiple galaxy properties for 15 Seyfert galaxies from the AGNIFS (Active…
Digging deeper into NGC 6868 II: ionized gas and excitation mechanism
João P. V. Benedetti, Rogério Riffel, Tiago Ricci +9
We studied the ionized gas in the inner region ( pc) of the galaxy NGC 6868 using Gemini/GMOS integral field unit observations. Channel maps reveal complex ki…
Observational constraints on the stellar recycled gas in active galactic nuclei feeding
Rogerio Riffel, Luis G. Dahmer-Hahn, Alexandre Vazdekis +15
Near-infrared long-slit spectroscopy has been used to study the stellar population (SP) of the low luminosity active galactic nuclei (AGN) and matched analogues (LLAMA) sample. To…
SMARTY: The mileS Moderate resolution neAr-infRared sTellar librarY
Michele Bertoldo-Coêlho, Rogério Riffel, Marina Trevisan +13
Most of the observed galaxies cannot be resolved into individual stars and are studied through their integrated spectrum using simple stellar populations (SSPs) models, with stella…
What drives the Coronal Lines? Resolving the forbidden, high-ionization emission regions in a sample of AGNs
Swayamtrupta Panda, Alberto Rodríguez Ardila, Marcos A. Fonseca Faria +3
Emission-line studies in the active galactic nuclei (AGNs), particularly those utilizing high spatial resolution, provide the most accurate method to determine critical quantities…
Physical Conditions and Extension of the Coronal Line Region in IC 5063
M. A. Fonseca-Faria, A. Rodríguez-Ardila, M. Contini +2
We study the ionised and highly ionised gas phases in the Seyfert~2 galaxy IC~5063 by means of VLT/MUSE integral field spectroscopy. Our analysis allowed us to detect a high-ionisa…
A Decade of Near-Infrared Variability in NGC4388: Insights into the AGN Structure
Luis G. Dahmer-Hahn, Alberto Rodríguez-Ardila, Marina Bianchin +4
Variability studies have proven to be a powerful diagnostic tool for understanding the physics and properties of of Active Galactic Nuclei (AGNs). They provide insights into the sp…
Digging deeper into NGC\,6868 I: stellar population
João P. V. Benedetti, Rogério Riffel, Tiago Ricci +8
We use Gemini integral field unit observations to map the stellar population properties in the inner region ( pc) of the galaxy NGC 6868. In order to understa…
The AGNIFS survey: spatially resolved observations of hot molecular and ionised outflows in nearby active galaxies
R. A. Riffel, T. Storchi-Bergmann, R. Riffel +17
We present the hot molecular and warm ionised gas kinematics for 33 nearby () X-ray selected active galaxies using the Hm and Br emiss…
Gemini NIFS survey of feeding and feedback processes in nearby Active Galaxies: VI -- Stellar Populations
Rogério Riffel, Luis G. Dahmer-Hahn, Rogemar A. Riffel +8
We use Gemini Near-Infrared Integral Field Spectrograph (NIFS) adaptive optics assisted data-cubes to map the stellar population of the inner few hundred parsecs of a sample of 18…
Optical Properties of Peaked Spectrum Radio Sources
R. S. Nascimento, A. Rodríguez-Ardila, L. Dahmer-Hahn +5
In this work, we study the optical properties of compact radio sources selected from the literature in order to determine the impact of the radio-jet in their circumnuclear environ…
Gemini NIFS survey of feeding and feedback in nearby Active Galaxies -- V. Molecular and Ionised Gas Kinematics
M. Bianchin, R. A. Riffel, T. Storchi-Bergmann +7
We study the gas distribution and kinematics of the inner kpc of six moderately luminous (43.43log44.83) nearby () Seyfert galaxies…
Stellar populations in local AGNs: evidence for enhanced star formation in the inner 100pc
L. G. Dahmer-Hahn, R. Riffel, A. Rodríguez-Ardila +7
In modern models and simulations of galactic evolution, the star formation in massive galaxies is regulated by an ad hoc active galactic nuclei (AGN) feedback process. However, the…
A Gemini-NIFS view of the merger remnant NGC 34
J. C. Motter, R. Riffel, T. V. Ricci +8
The merger remnant NGC 34 is a local luminous infrared galaxy (LIRG) hosting a nuclear starburst and a hard X-ray source associated with a putative, obscured Seyfert~2 nucleus. In…
The AGNIFS survey: distribution and excitation of the hot molecular and ionised gas in the inner kpc of nearby AGN hosts
R. A. Riffel, T. Storchi-Bergmann, R. Riffel +13
We use the Gemini NIFS instrument to map the Hm and Br flux distributions in the inner 0.04-2 kpc of a sample of 36 nearby active galaxies ($0.001\lesssim z\lesssim0…
Gemini NIFS survey of feeding and feedback in nearby Active Galaxies -- IV. Excitation
Rogemar A. Riffel, Marina Bianchin, Rogerio Riffel +5
The near-infrared spectra of Active Galactic Nuclei (AGN) present emission lines of different atomic and molecular species. The mechanisms involved in the origin of these emission…
Coronal Line Forest AGN I: physical properties of the emission-line regions
F. C. Cerqueira-Campos, A. Rodríguez-Ardila, R. Riffell +3
Coronal-Line Forest Active Galactic Nuclei (CLiF AGN) are characterized by strong high-ionization lines, which contrast to what is found in most AGNs. Here, we carry out a multiwav…
A panchromatic spatially resolved study of the inner 500pc of NGC1052 -- II: Gas excitation and kinematics
Luis G. Dahmer-Hahn, Rogério Riffel, Tiago V. Ricci +8
We map the optical and near-infrared (NIR) emission-line flux distributions and kinematics of the inner 320535pc of the elliptical galaxy NGC1052. The integral field sp…