J. R. Walsh
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View article: Detection of CH3+ in the O-rich planetary nebula NGC 6302
Detection of CH3+ in the O-rich planetary nebula NGC 6302 Open
Planetary nebulae are sites where ejected stellar material evolves into complex molecules, but the precise physical conditions and chemical routes that govern these processes are unclear. The presence of abundant carbon-rich molecules in O…
View article: The heart of NGC 5253 as seen with MUSE-NFM: nitrogen enrichment through stellar chemical feedback at parsec scales
The heart of NGC 5253 as seen with MUSE-NFM: nitrogen enrichment through stellar chemical feedback at parsec scales Open
NGC 5253 is a nearby (D=3.6 Mpc) Blue Compact Dwarf galaxy, notable for its three massive young super star clusters (SSCs) and nitrogen enrichment. Its similarity to extreme star-forming galaxies at high redshift makes it a good local anal…
View article: The <i>JWST</i>/MIRI view of the planetary nebula NGC 6302 – I. A UV-irradiated torus and a hot bubble triggering PAH formation
The <i>JWST</i>/MIRI view of the planetary nebula NGC 6302 – I. A UV-irradiated torus and a hot bubble triggering PAH formation Open
NGC 6302 is a spectacular bipolar planetary nebula (PN) whose spectrum exhibits fast outflows and highly ionized emission lines, indicating the presence of a very hot central star (${\sim}$220 000 K). Its infrared spectrum reveals a mixed …
View article: Detection of the [C I] <i>λ</i>8727 emission line
Detection of the [C I] <i>λ</i>8727 emission line Open
We report the first spatially resolved detection of the near-infrared [C I ] λ8727 emission from the outer pair of low-ionization structures in the planetary nebula NGC 7009 from data obtained by the Multi Unit Spectroscopic Explorer integ…
View article: Euclid Spectroscopic Image Simulations and Reconstruction
Euclid Spectroscopic Image Simulations and Reconstruction Open
Parallel Talk presented at the XX International Workshop on Neutrino Telescopes - Venice 23-27 October 2023 Abstract: Euclid is a European Space Agency (ESA) mission, designed to investigate the nature of Dark Energy and Dark Matter. It wi…
View article: The messy death of a multiple star system and the resulting planetary nebula as observed by JWST
The messy death of a multiple star system and the resulting planetary nebula as observed by JWST Open
Planetary nebulae (PNe), the ejected envelopes of red giant stars, provide us with a history of the last, mass-losing phases of 90 percent of stars initially more massive than the Sun. Here, we analyse James Webb Space Telescope (JWST) Ear…
View article: Author Correction: The messy death of a multiple star system and the resulting planetary nebula as observed by JWST
Author Correction: The messy death of a multiple star system and the resulting planetary nebula as observed by JWST Open
View article: The messy death of a multiple star system and the resulting planetary nebula as observed by JWST
The messy death of a multiple star system and the resulting planetary nebula as observed by JWST Open
View article: Leon B. Lucy (1938–2018)
Leon B. Lucy (1938–2018) Open
Lucy introduced smoothed-particle dynamics, invented a method to combine radiative transfer calculations in expanding atmospheres using Monte Carlo methods and co-developed the Richardson-Lucy deconvolution algorithm.
View article: Spectroscopic analysis tool for intEgraL fieLd unIt daTacubEs (<scp>satellite</scp>): case studies of NGC 7009 and NGC 6778 with MUSE
Spectroscopic analysis tool for intEgraL fieLd unIt daTacubEs (<span>satellite</span>): case studies of NGC 7009 and NGC 6778 with MUSE Open
Integral field spectroscopy (IFS) provides a unique capability to spectroscopically study extended sources over a 2D field of view, but it also requires new techniques and tools. In this paper, we present an automatic code, Spectroscopic A…
View article: SATELLITE: Application to Planetary Nebulae IFU Data
SATELLITE: Application to Planetary Nebulae IFU Data Open
The integral field unit (IFU) spectroscopic view of extended ionized nebulae, such as planetary nebulae (PNe), H II regions, and galaxies, has changed the approach of studying these objects, providing a simultaneous characterization in bot…
View article: Studying Nearby Galactic Planetary Nebulae with MUSE: On the Physical Properties of IC 418
Studying Nearby Galactic Planetary Nebulae with MUSE: On the Physical Properties of IC 418 Open
Spectroscopic mapping of planetary nebulae (PNe) is particularly useful to capture the richness in terms of physical and chemical properties that exist in these objects. The advent of the multi-unit spectroscopic explorer (MUSE), a large i…
View article: Integral Field Spectroscopy of Planetary Nebulae with MUSE
Integral Field Spectroscopy of Planetary Nebulae with MUSE Open
The Multi-Unit Spectroscopic Explorer (MUSE) is a large integral field unit mounted on the ESO Very Large Telescope. Its spatial (60 arcsecond field) and wavelength (4800-9300A) coverage is well suited to detailed imaging spectroscopy of e…
View article: Integral Field Spectroscopy of Planetary Nebulae with MUSE
Integral Field Spectroscopy of Planetary Nebulae with MUSE Open
The Multi-Unit Spectroscopic Explorer (MUSE) is a large integral field unit mounted on the ESO Very Large Telescope. Its spatial (60 arcsecond field) and wavelength (4800–9300Å) coverage is well suited to detailed imaging spectroscopy of e…
View article: BlueMUSE: Project Overview and Science Cases
BlueMUSE: Project Overview and Science Cases Open
We present the concept of BlueMUSE, a blue-optimised, medium spectral resolution, panoramic integral field spectrograph based on the MUSE concept and proposed for the Very Large Telescope. With an optimised transmission down to 350 nm, a l…
View article: An imaging spectroscopic survey of the planetary nebula NGC 7009 with MUSE
An imaging spectroscopic survey of the planetary nebula NGC 7009 with MUSE Open
Aims. The spatial structure of the emission lines and continuum over the 5000 extent of the nearby, O-rich, PN NGC 7009 (Saturn
\nNebula) have been observed with the MUSE integral field spectrograph on the ESO Very Large Telescope. This st…
View article: A Two-dimensional Spectroscopic Study of Emission-line Galaxies in the Faint Infrared Grism Survey (FIGS). I. Detection Method and Catalog
A Two-dimensional Spectroscopic Study of Emission-line Galaxies in the Faint Infrared Grism Survey (FIGS). I. Detection Method and Catalog Open
We present the results from the application of a two-dimensional emission line detection method, EMission-line two-Dimensional (EM2D), to the near-infrared G102 grism observations obtained with the Wide-Field Camera 3 (WFC3) as part of the…
View article: Accretion Discs In Halpha With Omegacam - Adhoc Survey
Accretion Discs In Halpha With Omegacam - Adhoc Survey Open
We recently concluded the Accretion Discs in Halpha with OmegaCAM (ADHOC) survey aimed at studying the population of Pre Main Sequence (PMS) objects in a number of close-by star forming regions. As part of the survey, we imaged in r, i and…
View article: The Accretion Discs in Hα with OmegaCAM (ADHOC) Survey
The Accretion Discs in Hα with OmegaCAM (ADHOC) Survey Open
We present the first results of the Accretion Discs in Hα with OmegaCAM (ADHOC) survey, which aims to perform a deep and homogeneous photometric study of pre-main sequence (PMS) stars in a number of nearby star-forming regions. We took adv…
View article: FIGS—Faint Infrared Grism Survey: Description and Data Reduction
FIGS—Faint Infrared Grism Survey: Description and Data Reduction Open
The Faint Infrared Grism Survey (FIGS) is a deep Hubble Space Telescope ( HST ) WFC3/IR (Wide Field Camera 3 Infrared) slitless spectroscopic survey of four deep fields. Two fields are located in the Great Observatories Origins Deep Survey…
View article: A tale of three cities
A tale of three cities Open
As part of the accretion discs in H alpha with OmegaCAM (ADHOC) survey, we imaged a region of 12x8 square degrees around the Orion Nebula Cluster in r, i and H alpha. Thanks to the high-quality photometry obtained, we discovered three well…
View article: A Tale of Three Cities: OmegaCAM discovers multiple sequences in the color-magnitude diagram of the Orion Nebula Cluster
A Tale of Three Cities: OmegaCAM discovers multiple sequences in the color-magnitude diagram of the Orion Nebula Cluster Open
As part of the Accretion Discs in H$α$ with OmegaCAM (ADHOC) survey, we imaged in r, i and H-alpha a region of 12x8 square degrees around the Orion Nebula Cluster. Thanks to the high-quality photometry obtained, we discovered three well-se…
View article: <i>Gaia</i>: mapping the dynamics and morphologies of Galactic Planetary Nebulae: First results from <i>Gaia</i> Data Release 1
<i>Gaia</i>: mapping the dynamics and morphologies of Galactic Planetary Nebulae: First results from <i>Gaia</i> Data Release 1 Open
This paper comments on the use Gaia in studying the internal dynamics and morphologies of Planetary Nebulae (PN). It is noted that the second and subsequent releases of Gaia data, will have significant potential in unravelling PN morpholog…
View article: The Wolf-Rayet Population and ISM Interaction in Nearby Starbursts
The Wolf-Rayet Population and ISM Interaction in Nearby Starbursts Open