370 citations · 2.2k across the 40 of their papers we have counts for
40 papers
The accuracy of merger times in hierarchical black hole triples
Giulia Fumagalli, Alejandro Vigna-Gómez
Orbit-averaged equations are widely used to model the gravitational-wave-driven evolution of compact binaries. Their validity relies on the radiation-reaction timescale being much…
Non-conservative Mass Transfer as a Formation Channel for Gaia Black Hole System
Aleksandra Olejak, Jakub Klencki, Alejandro Vigna-Gomez +6
The detected Gaia systems hosting compact objects challenge standard models of binary star evolution. In particular, if the observed black hole (BH) systems evolved in isolation, t…
Using detailed single star and binary evolution models to probe the large observed luminosity spread of red supergiants in young open star clusters
Chen Wang, Lee Patrick, Abel Schootemeijer +12
Red supergiants (RSGs) represent a late evolutionary stage of massive stars. Recent observations reveal that the observed luminosity range of RSGs in young open clusters is wider t…
Identifying Thorne-Żytkow Objects through Neutrinos
Pablo Martínez-Miravé, Irene Tamborra, Alejandro Vigna-Gómez
Thorne-Żytkow Objects (TŻOs) have been predicted to form when a neutron star is engulfed by a diffuse, convective giant envelope. Accretion onto a neutron star at a rate that is la…
Development of convective envelopes in massive stars: Implications for gravitational wave sources
Amedeo Romagnolo, Jakub Klencki, Alejandro Vigna-Gomez +1
The structure of stellar envelopes strongly influences the course and outcome of binary mass transfer, in particular of common envelope (CE) evolution. Convective envelopes can mos…
Stripped helium-star and compact object binaries in coeval populations -- predictions based on detailed binary evolution models
Chen Wang, Julia Bodensteiner, Xiao-Tian Xu +9
Massive stars mainly form in close binaries, where their mutual interactions can profoundly alter their evolutionary paths. Evolved binaries consisting of a massive OB-type main-se…
The Effect of Donor Star Rejuvenation on Common Envelope Evolution
C. Landri, P. M. Ricker, M. Renzo +2
In close binary star systems, common envelope evolution may occur after a previous phase of mass transfer. Some isolated formation channels for double neutron star binaries suggest…
Close Encounters of Wide Binaries Induced by the Galactic Tide: Implications for Stellar Mergers and Gravitational-Wave Sources
Jakob Stegmann, Alejandro Vigna-Gómez, Antti Rantala +6
A substantial fraction of stars can be found in wide binaries with projected separations between and . In the standard lore of binary physics, these would…
Rethinking Thorne-Żytkow Object Formation: The Fate of X-ray Binary LMC X-4 and Implications for Ultra-long Gamma-ray Bursts
Tenley Hutchinson-Smith, Rosa Wallace Everson, Angela A. Twum +5
We present a start-to-end simulation aimed at studying the long-term fate of high-mass X-ray binaries and whether a Thorne-Żytkow object (TŻO) might ultimately be assembled. We ana…
Rethinking Thorne-Żytkow Object Formation: Assembly via Common Envelope in Field Binaries
Rosa Wallace Everson, Tenley Hutchinson-Smith, Alejandro Vigna-Gómez +1
Thorne-Żytkow objects (TŻOs), hypothetical merger products in which a neutron star is embedded in a stellar core, are traditionally considered steady-state configurations. Their as…
Constraints on neutrino natal kicks from black-hole binary VFTS 243
Alejandro Vigna-Gómez, Reinhold Willcox, Irene Tamborra +8
The recently reported observation of VFTS 243 is the first example of a massive black-hole binary system with negligible binary interaction following black-hole formation. The blac…
Stellar triples with chemically homogeneously evolving inner binaries
Andris Dorozsmai, Silvia Toonen, Alejandro Vigna-Gómez +2
Observations suggest that massive stellar triples are common. However, their evolution is not yet fully understood. We investigate the evolution of hierarchical triples in which th…
Design and analysis of tweet-based election models for the 2021 Mexican legislative election
Alejandro Vigna-Gómez, Javier Murillo, Manelik Ramirez +3
Modelling and forecasting real-life human behaviour using online social media is an active endeavour of interest in politics, government, academia, and industry. Since its creation…
Wide binary pulsars from electron-capture supernovae
Simon Stevenson, Reinhold Willcox, Alejandro Vigna-Gomez +1
Neutron stars receive velocity kicks at birth in supernovae. Those formed in electron-capture supernovae from super asymptotic giant branch stars -- the lowest mass stars to end th…
Mergers prompted by dynamics in compact, multiple-star systems: a stellar-reduction case for the massive triple TIC 470710327
Alejandro Vigna-Gómez, Bin Liu, David R. Aguilera-Dena +3
TIC 470710327, a massive compact hierarchical triple-star system, was recently identified by NASA's Transiting Exoplanet Survey Satellite (TESS). TIC 470710327 is comprised of a co…
A binary origin for the first isolated stellar-mass black hole detected with astrometric microlensing
Alejandro Vigna-Gómez, Enrico Ramirez-Ruiz
The Milky Way is believed to host hundreds of millions of quiescent stellar-mass black holes (BHs). In the last decade, some of these objects have been potentially uncovered via gr…
Impact of Massive Binary Star and Cosmic Evolution on Gravitational Wave Observations II: Double Compact Object Rates and Properties
Floor S. Broekgaarden, Edo Berger, Simon Stevenson +9
Making the most of the rapidly increasing population of gravitational-wave detections of black hole (BH) and neutron star (NS) mergers requires comparing observations with populati…
Multi-Messenger Constraints on Magnetic Fields in Merging Black Hole-Neutron Star Binaries
Daniel J. D'Orazio, Zoltan Haiman, Janna Levin +2
The LIGO-Virgo-KAGRA Collaboration recently detected gravitational waves (GWs) from the merger of black-hole-neutron-star (BHNS) binary systems GW200105 and GW200115. No coincident…
Rapid stellar and binary population synthesis with COMPAS
Team COMPAS, :, Jeff Riley +23
Compact Object Mergers: Population Astrophysics and Statistics (COMPAS; https://compas.science) is a public rapid binary population synthesis code. COMPAS generates populations of…
Constraints on Weak Supernova Kicks from Observed Pulsar Velocities
Reinhold Willcox, Ilya Mandel, Eric Thrane +3
Observations of binary pulsars and pulsars in globular clusters suggest that at least some pulsars must receive weak natal kicks at birth. If all pulsars received strong natal kick…
Fallback supernova assembly of heavy binary neutron stars and light black hole-neutron star pairs and the common stellar ancestry of GW190425 and GW200115
Alejandro Vigna-Gómez, Sophie L. Schrøder, Enrico Ramirez-Ruiz +4
The detection of the unusually heavy binary neutron star merger GW190425 marked a stark contrast to the mass distribution from known Galactic pulsars in double neutron star binarie…
Impact of Massive Binary Star and Cosmic Evolution on Gravitational Wave Observations I: Black Hole-Neutron Star Mergers
Floor S. Broekgaarden, Edo Berger, Coenraad J. Neijssel +7
Mergers of black hole-neutron star (BHNS) binaries have now been observed by GW detectors with the recent announcement of GW200105 and GW200115. Such observations not only provide…
Wind mass-loss rates of stripped stars inferred from Cygnus X-1
Coenraad J. Neijssel, Serena Vinciguerra, Alejandro Vigna-Gomez +5
Recent observations of the high-mass X-ray binary Cygnus X-1 have shown that both the companion star (41 solar masses) and the black hole (21 solar masses) are more massive than pr…
Massive Stellar Triples Leading to Sequential Binary Black-Hole Mergers in the Field
Alejandro Vigna-Gómez, Silvia Toonen, Enrico Ramirez-Ruiz +3
Stellar triples with massive stellar components are common, and can lead to sequential binary black-hole mergers. Here, we outline the evolution towards these sequential mergers, a…