97 citations · 1.3k across the 112 of their papers we have counts for
112 papers
Interactive event-driven 4D-STEM with Timepix4 and live analytical ptychography
Arno Annys, Hoelen L. Lalandec Robert, Jo Verbeeck
Four-dimensional scanning transmission electron microscopy provides access to rich diffraction information at every probe position, but the high data rates associated with pixelate…
Formation and Evolution of [Wolf-Rayet] Planetary Nebulae through a Late Thermal Pulse
J. B. Rodríguez-González, R. Orozco-Duarte, J. A. Toalá +5
We present the first radiation-hydrodynamical simulations of the formation of a born-again planetary nebula (PN) triggered by a late thermal pulse (LTP). The 2D radiation-hydrodyna…
Wind accretion onto planets orbiting an evolving Solar-like star and their detectability
P. Padilla-López, R. F. Maldonado, J. A. Toalá +2
As stars evolve, they undergo significant changes in their physical properties, which can have a profound impact on the planets orbiting them. In particular, the mass lost through…
Accretion in Binary Systems with Slow Stellar Winds
Jesús A. Toalá, Emilio Tejeda, Raúl F. Maldonado +1
Wind accretion in binary systems is commonly described using the Bondi-Hoyle-Lyttleton (BHL) formalism. However, its standard implementation fails in the slow-wind regime, where th…
SDSS-V Local Volume Mapper (LVM): Helix Nebula public data, Data Analysis Pipeline data products
S. F. Sánchez, J. E. Méndez-Delgado, A. Mejía-Narváez +21
We present a spatially resolved spectroscopic analysis of the Helix Nebula (NGC 7293) using data from the SDSS-V Local Volume Mapper (LVM), by applying the recently developed LVM D…
Formation and X-ray emission from hot bubbles in planetary nebulae - III. The impact of [Wolf-Rayet]-type winds
Rogelio Orozco-Duarte, Jesús A. Toalá, S. Jane Arthur +3
We use radiation-hydrodynamical simulations to investigate the formation and synthetic X-ray emission of hot bubbles within planetary nebulae (PNe) driven by the powerful winds of…
A targeted radio survey of infrared-selected bow shock candidates
M. Moutzouri, J. Mackey, N. Castro +8
Bow shocks around massive stars have primarily been detected in IR emission, but radio detections are becoming more frequent with the commissioning of sensitive and large field-of-…
Magnetic fields in planetary nebulae detected through non-thermal radio continuum emission
Marcin Hajduk, Timothy Shimwell, Glenn White +3
Context. Planetary nebulae are shells ejected by low- and intermediate-mass stars. The slow wind ejected by the asymptotic giant branch star is compressed by a fast stellar wind to…
The Influence of the Accretion Disc Structure on X-ray Spectral States in Symbiotic Binaries
Jesús A. Toalá, Diego A. Vasquez-Torres
Symbiotic stars are binary systems where a white dwarf (WD) accretes material from the wind of an evolved, late-type companion. X-ray-emitting symbiotic systems are classified into…
Planetary Nebula Evolution for Single Stellar Models. The Formation of Neutral Spikes
Guillermo Garcia-Segura, Arturo Manchado, Jesus A. Toala +2
Two-dimensional hydrodynamical simulations are presented from the formation up to the late evolution of planetary nebula, for 6 different stellar models from 1 to 5 Mo. The hydrody…
Entering the Wind Roche Lobe Overflow realm in Symbiotic Systems
R. F. Maldonado, J. A. Toalá, E. Tejeda +1
We present a suite of dynamical simulations designed to explore the orbital and accretion properties of compact (27 AU) symbiotic systems, focusing on wind accretion, drag force…
Tiānguān ( Tau) as a binary system consisting of a Be-star and an accreting White Dwarf: opening a gate to understanding enigmatic Cas analogues
Jesús A. Toalá, Lidia M. Oskinova, Diego A. Vasquez-Torres
The analogues of Cassiopea are binary early type Be stars which are X-ray bright with hard thermal spectra. The nature of companions in these stars and mechanisms of their X-ra…
CGCS 6306, another X-ray-emitting asymptotic giant branch star confirmed to be a symbiotic binary
Jaroslav Merc, Martín A. Guerrero, Jesús A. Toalá +1
A number of asymptotic giant branch (AGB) stars are known to exhibit UV excess and/or X-ray emission. These have been considered signposts of a hot white dwarf (WD) companion in a…
A morphological catalogue of Nova Remnants
Edgar Santamaria, Martin A. Guerrero, Gerardo Ramos-Larios +2
This work presents the first optical imaging catalogue of resolved Galactic nova remnants. It compiles images from proprietary observations carried out at the Nordic Optical Telesc…
The impact of wind accretion in Evolving Symbiotic Systems
R. F. Maldonado, J. A. Toalá, J. B. Rodríguez-González +1
We investigate the impact of geometric corrections to the Bondi-Hoyle-Lyttleton (BHL) accretion scheme applied to evolving symbiotic systems. We model systems where 0.7 and 1 M$_\o…
VLT VIMOS Integral Field Spectroscopy of the nova remnant FH Ser
M. A. Guerrero, E. Santamaria, L. Takeda +4
FH Ser experienced a slow classical nova outburst in February 1970 that was the first one observed at UV, optical, and IR wavelengths. Its nova remnant is elliptical in shape, with…
Y Gem, a symbiotic star outshone by its asymptotic giant branch primary component
M. A. Guerrero, D. A. Vasquez-Torres, J. B. Rodríguez-González +2
A considerable number of asymptotic giant branch (AGB) stars exhibit UV excess and/or X-ray emission that indicates a binary companion. AGB stars are so bright that they easily out…
Confirmation of the planetary nebula nature of HaTr 5. Not the remnant of Nova Sco 1437
M. A. Guerrero, E. Santamaria, G. Liberato +6
The identification of the nebula HaTr 5 with the shell remnant of the historic Nova Sco 1437 around the low-accretion rate cataclysmic variable 2MASS J17022815-4306123 has been use…
Accretion onto WD 2226210, the central star of the Helix Nebula
S. Estrada-Dorado, M. A. Guerrero, J. A. Toalá +4
The central star of the Helix Nebula, WD 2226210 presents enigmatic hard X-ray emission and mid-IR excess. The latter has been attributed to a dusty disk or a cloud-like structu…
The impact of periastron passage on the X-ray and optical properties of the Symbiotic System R Aquarii
D. A. Vásquez-Torres, J. A. Toalá, A. Sacchi +4
Multi-epoch Chandra and XMM-Newton observations of the symbiotic system R Aquarii (R Aqr) spanning 22 yr are analysed by means of a reflection model produced by an accretion disc.…
Geometric correction for wind accretion in binary systems
Emilio Tejeda, Jesús A. Toalá
The Bondi-Hoyle-Lyttleton (BHL) accretion model is widely used to describe how a compact object accretes material from a companion's stellar wind in binary systems. However, its st…
Sakurai's object: a [WC] star in a new bipolar nebula after a VLTP
Griet Van de Steene, Peter van Hoof, Stefan Kimeswenger +5
Optical spectra of the Very Late Thermal Pulse (VLTP) object V4334 Sgr have shown a rapidly changing spectrum resulting from shocks in the outflow, which created a new bipolar nebu…
Non-thermal radio emission in Sakurai's Object
Marcin Hajduk, Peter A. M. van Hoof, Albert A. Zijlstra +5
The very late thermal pulse (VLTP) affects the evolution of 20\% of 1--8\, stars, repeating the last phases of the red giant within a few years and leading t…
Asymptotic giant branch stars in the eROSITA-DE eRASS1 catalog
Martin A. Guerrero, Rodolfo Montez, Roberto Ortiz +2
AGB stars are not expected to be X-ray-emitters, yet a small fraction of them, the so-called X-AGBs, show X-ray emission that can be attributed to coronal activity of a companion o…