Density Profiles of Collapsed Rotating Massive Stars Favor Long Gamma-Ray Bursts

Autor: Goni Halevi, Belinda Wu, Philipp Mösta, Ore Gottlieb, Alexander Tchekhovskoy, David R. Aguilera-Dena

Publikováno v: The Astrophysical Journal Letters, Vol 944, Iss 2, p L38 (2023)

Long-duration gamma-ray bursts (lGRBs) originate in relativistic collimated outflows—jets—that drill their way out of collapsing massive stars. Accurately modeling this process requires realistic stellar profiles for the jets to propagate through

Externí odkaz: https://doaj.org/article/7b3bcd3ca70b4ee8979b71564efe7a26

Three dimensional magnetorotational core-collapse supernova explosions of a 39 solar mass progenitor star

Autor: Jade Powell, Bernhard Müller, David R Aguilera-Dena, Norbert Langer

We perform three-dimensional simulations of magnetorotational supernovae using a $39\,M_{\odot}$ progenitor star with two different initial magnetic field strengths of $10^{10}$ G and $10^{12}$ G in the core. Both models rapidly undergo shock revival

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4244fe9f65849eb081109accb4c0818d
http://arxiv.org/abs/2212.00200

Stripped-envelope stars in different metallicity environments

Autor: David R. Aguilera-Dena, Bernhard Müller, John Antoniadis, Norbert Langer, Luc Dessart, Alejandro Vigna-Gómez, Sung-Chul Yoon

Publikováno v: Aguilera-Dena, D R, Mueller, B, Antoniadis, J, Langer, N, Dessart, L, Vigna-Gomez, A & Yoon, S-C 2023, ' Stripped-envelope stars in different metallicity environments II. Type I supernovae and compact remnants ', Astronomy & Astrophysics, vol. 671, A134 . https://doi.org/10.1051/0004-6361/202243519

Stripped-envelope stars can be observed as Wolf-Rayet (WR) stars, or as less luminous hydrogen-poor stars with low mass loss rates and transparent winds. Both types are potential progenitors of Type I core-collapse supernovae (SNe). We use grids of c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b26feb5e5f6a8dc97199574d967fdb54
https://doi.org/10.1051/0004-6361/202243519

Explodability fluctuations of massive stellar cores enable asymmetric compact object mergers such as GW190814

Autor: John Antoniadis, David R. Aguilera-Dena, Alejandro Vigna-Gómez, Michael Kramer, Norbert Langer, Bernhard Müller, Thomas M. Tauris, Chen Wang, Xiao-Tian Xu

Publikováno v: Antoniadis, J, Aguilera-Dena, D R, Vigna-Gómez, A, Kramer, M, Langer, N, Müller, B, Tauris, T M, Wang, C & Xu, X T 2022, ' Explodability fluctuations of massive stellar cores enable asymmetric compact object mergers such as GW190814 ', Astronomy and Astrophysics, vol. 657, L6 . https://doi.org/10.1051/0004-6361/202142322

The first three observing runs with Advanced LIGO and Virgo have resulted in the detection of binary black hole mergers (BBH) with highly unequal mass components, which are difficult to reconcile with standard formation paradigms. The most representa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::076a2264f5d455d01ae6df62ae7bc757
http://arxiv.org/abs/2110.01393

A three-dimensional hydrodynamics simulation of oxygen-shell burning in the final evolution of a fast-rotating massive star

Autor: Takashi Yoshida, Kei Kotake, Koh Takahashi, David R. Aguilera-Dena, Ko Nakamura, Norbert Langer, Hideyuki Umeda, Tomoya Takiwaki

Publikováno v: Monthly Notices of the Royal Astronomical Society: Letters

We perform for the first time a 3D hydrodynamics simulation of the evolution of the last minutes pre-collapse of the oxygen shell of a fast-rotating massive star. This star has an initial mass of 38 M$_\odot$, a metallicity of $\sim$1/50 Z$_\odot$, a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::421aa9b6f141846eef7acfe972fd56a2
https://hdl.handle.net/21.11116/0000-0009-1325-821.11116/0000-0009-1327-621.11116/0000-0009-1328-5