19 citations · 38 across the 11 of their papers we have counts for
11 papers
K 1-6 is a photoionised ISM nebula shaped by a fast-moving hot white dwarf in a triple system
Jaroslav Merc, David Jones, Ana Escorza +22
K 1-6 has long been classified as a planetary nebula (PN) hosting a binary central star, yet it has remained poorly studied due to its faintness. The central star exhibits pronounc…
There is no single density: star-forming regions and galaxies hold more dense ionized gas than long assumed
J. Eduardo Méndez-Delgado, Christophe Morisset, William J. Henney +29
Ionized gas fills star-forming regions and galaxies, and nearly everything we know about its temperature, pressure, mass, and composition is inferred from its emission lines [1-3].…
Panning for gold, but finding helium: discovery of the ultra-stripped supernova SN2019wxt from gravitational-wave follow-up observations
I. Agudo, L. Amati, T. An +96
We present the results from multi-wavelength observations of a transient discovered during the follow-up of S191213g, a gravitational wave (GW) event reported by the LIGO-Virgo Col…
Radial distribution of helium in the Milky Way
J. E. Méndez-Delgado, C. Esteban, J. García-Rojas
We present preliminary results of the study of the radial distribution of helium in the Milky Way. We use 37 spectra from 23 Galactic HII regions observed with VLT, GTC and Magella…
Identification of Near-Infrared [Se III] and [Kr VI] Emission Lines in Planetary Nebulae
N. C. Sterling, S. Madonna, K. Butler +5
We identify [Se III] 1.0994 micron in the planetary nebula (PN) NGC 5315 and [Kr VI] 1.2330 micron in three PNe, from spectra obtained with the FIRE spectrometer on the 6.5-m Baade…
Investigating spatial variation of the physical and chemical conditions of NGC 6778
H. Monteiro, J. Garcia-Rojas, D. Jones +2
A number of planetary nebulae show binary central stars and significant abundance discrepancies between values estimated from colisionally excited lines when compared to the same a…
Chemical abundances in Galactic planetary nebulae from faint emission lines
Jorge García-Rojas
Deep spectrophotometry has proved to be a fundamental tool to improve our knowledge on the chemical content of planetary nebulae. With the arrival of very efficient spectrographs i…
Close binary central stars and the abundance discrepancy - new extreme objects
R. Wesson, D. Jones, J. García-Rojas +2
Recent work (Corradi et al. 2015, Jones et al. 2016) has shown that the phenomenon of extreme abundance discrepancies, where recombination line abundances exceed collisionally exci…
Neutron-capture element abundances in the planetary nebula NGC 5315 from deep high-resolution optical and near-IR spectrophotometry
S. Madonna, J. García-Rojas, N. C. Sterling +1
We have done a spectroscopical analysis of the type I planetary nebula (PN) NGC 5315, through high-resolution (R40000) optical spectroscopy with UVES at the 8.2m Very Large T…
A window on the efficiency of the s-process in AGB stars: chemical abundances of n-capture elements in the planetary nebula NGC 3918
S. Madonna, J. García-Rojas, V. Luridiana +2
The chemical content of the planetary nebula NGC 3918 is investigated through deep, high-resolution (R~40000) UVES at VLT spectrophotometric data. We identify and measure more than…
Chemical evolution and the galactic habitable zone of M31 (the Andromeda Galaxy)
L. Carigi, J. Garcia-Rojas, S. Meneses-Goytia
We have computed the Galactic Habitable Zones (GHZs) of the Andromeda galaxy (M31) based on the probability of terrestrial planet formation, which depends on the metallicity (Z) of…