J. A. Fernández-Ontiveros
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View article: J-PAS: Discovery of RaJav, a bright extended Ly <b>α</b> Nebula at <i>z</i> = 2.25
J-PAS: Discovery of RaJav, a bright extended Ly <b>α</b> Nebula at <i>z</i> = 2.25 Open
We report the discovery of a massive Ly α nebula (potentially largest ever discovered), RaJav, at z = 2.25, associated with a quasar pair: the bright SDSS J162029.07+433451.1 (hereafter J1620+4334) and the faint newly discovered quasar JPA…
View article: Cosmic-ray impact on optical and mid-infrared emission-line diagnostics in NGC 5728
Cosmic-ray impact on optical and mid-infrared emission-line diagnostics in NGC 5728 Open
Cosmic rays (CRs), produced by the jets of active galactic nuclei (AGN) and supernovae (SNe), serve as a significant feedback mechanism influencing emission lines in narrow line region (NLR) clouds. These highly energetic particles, propel…
View article: J-PLUS: Turning Off the Bright Stars
J-PLUS: Turning Off the Bright Stars Open
Photometric surveys require precise point spread function (PSF) characterization, as it varies across filters and is crucial for accurate photometry and low surface brightness (LSB) studies. However, the small PSF size provided by default …
View article: Shocked, Heated, and Now Resolved: H$_2$ excitation in the low-luminosity AGN at M58 core with JWST
Shocked, Heated, and Now Resolved: H$_2$ excitation in the low-luminosity AGN at M58 core with JWST Open
We present JWST NIRSpec and MIRI MRS observations of the central kiloparsec of M58 (NGC 4579), a nearby LINER galaxy hosting a low-luminosity AGN (LLAGN; $L_\mathrm{bol} \sim 10^{42}$ erg s$^{-1}$) with a low-power jet. These data provide …
View article: J-PLUS: Understanding outlier white dwarfs in the third data release via dimensionality reduction
J-PLUS: Understanding outlier white dwarfs in the third data release via dimensionality reduction Open
Aims . We present the white dwarf catalog derived from the third data release of the Javalambre Photometric Local Universe Survey (J-PLUS DR3), which covers 3284 deg 2 using 12 optical filters. A particular focus is given to the classifica…
View article: Black hole accretion, star formation, and chemical evolution with PRobe far-infrared mission for astrophysics/far-IR enhanced survey spectrometer spectroscopy: toward the cosmic noon and beyond
Black hole accretion, star formation, and chemical evolution with PRobe far-infrared mission for astrophysics/far-IR enhanced survey spectrometer spectroscopy: toward the cosmic noon and beyond Open
The PRobe far-Infrared Mission for Astrophysics (PRIMA) will deliver the first comprehensive view of the obscured side of star formation and black hole accretion that dominates galaxy growth at cosmic noon. Around 90% of UV/optical photons…
View article: MIRACLE
MIRACLE Open
We present an analysis of the multi-phase gas properties in the Seyfert II galaxy NGC 424, using spatially resolved spectroscopic data from JWST/MIRI, part of the Mid-InfraRed Activity of Circumnuclear Line Emission (MIRACLE) programme, as…
View article: Gravitational torques from lopsided young stellar component sustain high black hole accretion rates in NGC 4593
Gravitational torques from lopsided young stellar component sustain high black hole accretion rates in NGC 4593 Open
Context. Supermassive black holes (SMBHs) grow primarily through gas accretion, observed as active galactic nuclei (AGNs). While mergers can drive luminous AGN episodes, secular processes may fuel a substantial portion of cosmic black hole…
View article: Exploring the hardness of the ionizing radiation with the infrared softness diagram
Exploring the hardness of the ionizing radiation with the infrared softness diagram Open
Aims. After exploring a version of the infrared (IR) softness diagram to characterize the hardness of the incident ionizing radiation in star-forming regions, we exploit the availability of high-excitation lines in the same spectral regime…
View article: J-PLUS: Spectroscopic validation of H<i>α</i> emission line maps in spatially resolved galaxies
J-PLUS: Spectroscopic validation of H<i>α</i> emission line maps in spatially resolved galaxies Open
Aims . We present a dedicated automated pipeline to construct spatially resolved emission H α +[NII] maps and to derive the spectral energy distributions (SEDs) in 12 optical filters (five broad and seven narrow and medium) of H α emission…
View article: J-PLUS: Spectroscopic validation of H$α$ emission line maps in spatially resolved galaxies
J-PLUS: Spectroscopic validation of H$α$ emission line maps in spatially resolved galaxies Open
We present a dedicated automated pipeline to construct spatially resolved emission H$α$+[NII] maps and to derive the spectral energy distributions (SEDs) in 12 optical filters (five broad and seven narrow/medium) of H$α$ emission line regi…
View article: Spatially-resolved spectro-photometric SED Modeling of NGC 253's Central Molecular Zone I. Studying the star formation in extragalactic giant molecular clouds
Spatially-resolved spectro-photometric SED Modeling of NGC 253's Central Molecular Zone I. Studying the star formation in extragalactic giant molecular clouds Open
Studying the interstellar medium in nearby starbursts is essential for understanding the physical mechanisms driving these objects, thought to resemble young star-forming galaxies. This study aims to analyze the physical properties of the …
View article: Andromeda's tenuous veil: extensive nebular emission near (yet far from) M31
Andromeda's tenuous veil: extensive nebular emission near (yet far from) M31 Open
A large, faint nebula was unexpectedly discovered near M31 using narrowband [O III] images. Its apparent size and the lack of a clear counterpart at other wavelengths make it unique and challenging to explain. We aim to determine whether t…
View article: Cosmic-ray ionization of low-excitation lines in active galactic nuclei and starburst galaxies
Cosmic-ray ionization of low-excitation lines in active galactic nuclei and starburst galaxies Open
Cosmic rays (CRs) can significantly impact dense molecular clouds in galaxies, heating the interstellar medium (ISM) and altering its chemistry, ionization, and thermal properties. Their influence is particularly relevant in environments w…
View article: A Case Study of Gas Impacted by Black-hole Jets with the JWST: Outflows, Bow Shocks, and High Excitation of the Gas in the Galaxy IC 5063
A Case Study of Gas Impacted by Black-hole Jets with the JWST: Outflows, Bow Shocks, and High Excitation of the Gas in the Galaxy IC 5063 Open
We present James Webb Space Telescope MIRI data of the inner ∼3 × 2 kpc 2 of the galaxy IC 5063, in which the jets of a supermassive black hole interact with the gaseous disk they are crossing. Jet-driven outflows were known to be initiate…
View article: Cosmic Ray Ionization of Low-Excitation Lines in Active Galactic Nuclei and Starburst Galaxies
Cosmic Ray Ionization of Low-Excitation Lines in Active Galactic Nuclei and Starburst Galaxies Open
Cosmic rays (CRs) can significantly impact dense molecular clouds in galaxies, heating the interstellar medium (ISM) and altering its chemistry, ionization, and thermal properties. Their influence is particularly relevant in environments w…
View article: J-PLUS: The fraction of calcium white dwarfs along the cooling sequence
J-PLUS: The fraction of calcium white dwarfs along the cooling sequence Open
Aims . We used the Javalambre Photometric Local Universe Survey (J-PLUS) second data release (DR2) photometry in 12 optical bands over 2176 deg 2 to estimate the fraction of white dwarfs with the presence of Ca II H+K absorption along the …
View article: AGN feeding along a one-armed spiral in NGC 4593
AGN feeding along a one-armed spiral in NGC 4593 Open
Context. We investigate active galactic nuclei (AGN) feeding through the molecular gas (CO(2−1) emission) properties of the local Seyfert 1 galaxy NGC 4593, using Atacama Large Millimeter Array (ALMA) observations and other multi-wavelengt…
View article: J-PLUS: Bayesian object classification with a strum of BANNJOS
J-PLUS: Bayesian object classification with a strum of BANNJOS Open
Context . With its 12 optical filters, the Javalambre-Photometric Local Universe Survey (J-PLUS) provides an unprecedented multicolor view of the local Universe. The third data release (DR3) covers 3192 deg 2 and contains 47.4 million obje…
View article: The PARSEC view of star formation in galaxy centres: from protoclusters to star clusters in an early-type spiral
The PARSEC view of star formation in galaxy centres: from protoclusters to star clusters in an early-type spiral Open
Understanding star formation in galaxies requires resolving the physical scale on which star formation often occurs: the scale of star clusters. We present a multiwavelength, eight-parsec resolution study of star formation in the circumnuc…
View article: The PARSEC view of star formation in galaxy centres: from protoclusters to star clusters in an early-type spiral
The PARSEC view of star formation in galaxy centres: from protoclusters to star clusters in an early-type spiral Open
Understanding star formation in galaxies requires resolving the physical scale on which star formation often occurs: the scale of star clusters. We present a multiwavelength, eight-parsec resolution study of star formation in the circumnuc…
View article: J-PLUS: The fraction of calcium white dwarfs along the cooling sequence
J-PLUS: The fraction of calcium white dwarfs along the cooling sequence Open
We used the Javalambre Photometric Local Universe Survey (J-PLUS) DR2 photometry in twelve optical bands over 2176 deg2 to estimate the fraction of white dwarfs with presence of CaII H+K absorption along the cooling sequence. We compared t…
View article: A case study of gas impacted by black-hole jets with the JWST: outflows, bow shocks, and high excitation of the gas in the galaxy IC5063
A case study of gas impacted by black-hole jets with the JWST: outflows, bow shocks, and high excitation of the gas in the galaxy IC5063 Open
We present James Webb Space Telescope MIRI data of the inner 3x2kpc^2 of the galaxy IC5063, in which the jets of a supermassive black hole interact with the gaseous disk they are crossing. Jet-driven outflows were known to be initiated alo…
View article: The miniJPAS Survey: The radial distribution of star formation rates in faint X-ray active galactic nuclei
The miniJPAS Survey: The radial distribution of star formation rates in faint X-ray active galactic nuclei Open
We study the impact of black hole nuclear activity on both the global and radial star formation rate (SFR) profiles in X-ray-selected active galactic nuclei (AGN) in the field of miniJPAS, the precursor of the much wider J-PAS project. Our…
View article: ReveaLLAGN 0: First Look at JWST MIRI Data of Sombrero and NGC 1052
ReveaLLAGN 0: First Look at JWST MIRI Data of Sombrero and NGC 1052 Open
We present the first results from the Revealing Low-Luminosity Active Galactic Nuclei (ReveaLLAGN) survey, a JWST survey of seven nearby LLAGNs. We focus on two observations with the Mid-Infrared Instrument (MIRI)’s Medium-Resolution Spect…
View article: J-PLUS: Bayesian object classification with a strum of BANNJOS
J-PLUS: Bayesian object classification with a strum of BANNJOS Open
With its 12 optical filters, the Javalambre-Photometric Local Universe Survey (J-PLUS) provides an unprecedented multicolor view of the local Universe. The third data release (DR3) covers 3,192 deg$^2$ and contains 47.4 million objects. Ho…
View article: The Spectral Energy Distributions and Bolometric Luminosities of Local AGN: Study of the Complete 12 μm AGN Sample
The Spectral Energy Distributions and Bolometric Luminosities of Local AGN: Study of the Complete 12 μm AGN Sample Open
We measure the bolometric luminosity of a complete and unbiased 12 μ m-selected sample of active galactic nuclei (AGN) in the local Universe. For each galaxy, we used a 10-band radio-to-X-ray spectral energy distribution (SED) to isolate t…
View article: Chemical abundances and deviations from the solar S/O ratio in the gas-phase interstellar medium of galaxies based on infrared emission lines
Chemical abundances and deviations from the solar S/O ratio in the gas-phase interstellar medium of galaxies based on infrared emission lines Open
Context. The infrared (IR) range is extremely useful in the context of chemical abundance studies of the gas-phase interstellar medium (ISM) due to the large variety of ionic species traced in this regime, the negligible effects from dust …
View article: The miniJPAS survey: Maximising the photo-<i>z</i> accuracy from multi-survey datasets with probability conflation
The miniJPAS survey: Maximising the photo-<i>z</i> accuracy from multi-survey datasets with probability conflation Open
We present a new method for obtaining photometric redshifts (photo- z ) for sources observed by multiple photometric surveys using a combination (conflation) of the redshift probability distributions (PDZs) obtained independently from each…
View article: Exploring the hardness of the ionising radiation with the infrared softness diagram
Exploring the hardness of the ionising radiation with the infrared softness diagram Open
Aims. We explored the softness parameter in the infrared, η IR ′ , whose main purpose is the characterisation of the hardness of the incident ionising radiation in emission-line nebulae. This parameter is obtained from the combination of m…