269 citations · 2k across the 53 of their papers we have counts for
53 papers
Studying hot evolved stars with ultraviolet spectroscopy
Stephan Geier, Nicole Reindl, Matti Dorsch +7
Hot evolved stars are key objects to reconstruct the various evolutionary pathways of Sun-like stars, to probe binary interactions and the physics of supernovae. They serve as powe…
A formation pathway for giant planets in S-type discs of γ-Cephei-like compact binaries
María Paula Ronco, Octavio M. Guilera, Julia Venturini +2
Planet formation in close binary systems such as -Cephei is strongly challenged by the truncation of the circumprimary disc induced by the stellar companion, which limits the av…
Stars on the ascending helium giant branch I. From white dwarf merger to helium giant: the evolutionary state of the rapidly rotating hot subdwarf HE 1518-0948
M. Pritzkuleit, M. Dorsch, M. M. Miller Bertolami +3
Hot subdwarf stars with masses above ascend the helium giant branch after the end of core helium burning, before entering the white dwarf cooling track or exploding a…
Two hot pre-white dwarfs inside the red-giant-branch planetary nebula Pa 13 -- Double core evolution or common envelope-induced rejuvenation?
Nicole Reindl, David Jones, Todd Hillwig +4
Close binary central stars of PNe offer a unique window for investigating the conditions immediately following the ejection of a common envelope (CE). Double eclipsing and double-l…
Observing bright pulsating white dwarfs with PLATO: A new window into the late stages of stellar evolution
Murat Uzundag, Alejandro H. Corsico, Nicholas Jannsen +17
We present the scientific case for exploiting the capabilities of the PLATO mission to study bright pulsating white dwarfs across a wide spectral range, including hydrogen-deficien…
Protoplanetary disc population synthesis I. Linking mass-dependent viscosity, star formation history and environment to observations
Jose L. Gomez, Octavio M. Guilera, Marcelo M. Miller Bertolami +2
Context. Recent studies highlight the importance of stellar mass sampling when determining disc lifetimes through observed disc fractions. Low-mass stars host discs with average li…
Revisiting astrophysical bounds on continuous spontaneous localization models
Martin Miguel Ocampo, Marcelo M. Miller Bertolami, Gabriel León
Among the open problems in fundamental physics, few are as conceptually significant as the measurement problem in Quantum Mechanics. One of the proposed solutions to this problem i…
A fading radius valley towards M-dwarfs, a persistent density valley across stellar types
Julia Venturini, María Paula Ronco, Octavio M. Guilera +3
The radius valley separating super-Earths from mini-Neptunes is a fundamental benchmark for theories of planet formation and evolution. Observations show that the location of the r…
A self-synthesized origin of heavy metals in hot subdwarf stars?
T. Battich, M. M. Miller Bertolami, A. M. Serenelli +2
Some He-rich hot subdwarf stars (He-sdOBs) present high abundances of trans-iron elements, such as Sr, Y, Zr and Pb. Diffusion processes are important in hot subdwarf stars, and it…
Planet formation around Intermediate-mass stars I: Different disc evolutionary pathways as a function of stellar mass
María Paula Ronco, Matthias R. Schreiber, Eva Villaver +2
The study of protoplanetary disc evolution and planet formation has mainly concentrated on solar (and low) mass stars since they host the majority of the confirmed exoplanets. Neve…
Quantifying the Impact of the Dust Torque on the Migration of Low-mass Planets
Octavio M. Guilera, Pablo Benitez-Llambay, Marcelo M. Miller Bertolami +1
Disk solids are critical in many planet formation processes, however, their effect on planet migration remains largely unexplored. Here we assess for the first time this important…
Uncertainties in the 12C+12C reaction rate and their impact on the composition of ultra-massive WDs
F. C. De Gerónimo, M. M. Miller Bertolami, M. Catelan +1
Stars with initial masses 7 Msun . MZAMS . 9 Msun reach temperatures high enough to ignite C under degenerate conditions after the end of He-core burning (Garcia-Berro & Iben 1994)…
A Red Giants' Toy Story II: Understanding the Red-Giant Branch Bump
Marcelo M. Miller Bertolami
The Red-Giant Branch Bump (RGBB) is one of the most noteworthy features in the red-giant luminosity function of stellar clusters. It is caused by the passage of the hydrogen-burnin…
Weighing stars from birth to death: mass determination methods across the HRD
Aldo Serenelli, Achim Weiss, Conny Aerts +31
The mass of a star is the most fundamental parameter for its structure, evolution, and final fate. It is particularly important for any kind of stellar archaeology and characteriza…
Pulsational instabilities driven by the mechanism in hot pre-horizontal branch stars I. The Hot-Flasher Scenario
Tiara Battich, Marcelo M. Miller Bertolami, Alejandro H. Córsico +1
The mechanism is a self-excitation mechanism of stellar pulsations which acts in regions inside the star where nuclear burning takes place. It has been shown that the mecha…
Chemical Abundances of Planetary Nebulae in the Substructures of M31 -- II. The Extended Sample and A Comparison Study with the Outer-disk Group
Xuan Fang, Ruben Garcia-Benito, Martin A. Guerrero +7
We report deep spectroscopy of ten planetary nebulae (PNe) in the Andromeda Galaxy (M31) using the 10.4m GTC. Our targets reside in different regions of M31, including halo streams…
The formation of giant planets in wide orbits by photoevaporation-synchronised migration
O. M. Guilera, M. M. Miller Bertolami, M. P. Ronco
The discovery of giant planets in wide orbits represents a major challenge for planet formation theory. In the standard core accretion paradigm planets are expected to form at radi…
New models for the evolution of central stars of planetary nebulae: Faster and Brighter
Marcelo M. Miller Bertolami
The post-asymptotic giant branch (AGB) phase is arguably one of the least understood phases of the evolution of low- and intermediate- mass stars. The recent post-AGB evolutionary…
On the formation of DA white dwarfs with low hydrogen contents: Preliminary Results
M. M. Miller Bertolami, L. G. Althaus, A. H. Córsico
Systematic photometric and asteroseismological studies in the last decade support the belief that white dwarfs in the solar neighborhood harbor a broad range of hydrogen-layer cont…
Post-AGB evolution much faster than previously thought
K. Gesicki, A. A. Zijlstra, M. M. Miller Bertolami
For 32 central stars of PNe we present their parameters interpolated among the new evolutionary sequences. The derived stellar final masses are confined between 0.53 and 0.58 $M_\o…
Breaking news from the HST: The central star of the Stingray Nebula is now returning towards the AGB
N. Reindl, T. Rauch, M. M. Miller Bertolami +2
SAO244567 is a rare example of a star that allows us to witness stellar evolution in real time. Between 1971 and 1990 it changed from a B-type star into the hot central star of the…
An asteroseismic constraint on the mass of the axion from the period drift of the pulsating DA white dwarf star L19-2
Alejandro H. Córsico, Alejandra D. Romero, Leandro G. Althaus +6
We employ an asteroseismic model of L19-2, a relatively massive ($M_{\star} \sim 0.75 M_{\sun}$) and hot ( K) pulsating DA (H-rich atmosphere) white dwarf…
On the relevance of bubbles and potential flows for stellar convection
Marcelo M. Miller Bertolami, Maxime Viallet, Vincent Prat +2
Recently Pasetto et al. have proposed a new method to derive a convection theory appropriate for the implementation in stellar evolution codes. Their approach is based on the simpl…
Testing Fundamental Particle Physics with the Galactic White Dwarf Luminosity Function
Marcelo M. Miller Bertolami, Brenda E. Melendez, Leandro G. Althaus +1
Recent determinations of the white dwarf luminosity function (WDLF) from very large surveys have extended our knowledge of the WDLF to very high luminosities. It has been shown tha…