Almudena Arcones
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Modelling the emission lines from r-process elements in supernova nebulae Open
The origin of heavy r-process elements in the Universe is still a matter of great debate, with a confirmed scenario being neutron star (NS) mergers. Additional relevant sites could be specific classes of events, such as gamma-ray burst (GR…
Complete Survey of <i>r</i>-process Conditions: The (Un)robustness of the <i>r</i>-process(es) Open
Heavy elements are synthesized by the r -process in neutron star mergers and potentially in rare supernovae linked to strong magnetic fields. Expensive hydrodynamic simulations of these extreme environments are usually postprocessed to cal…
View article: Low-energy Measurement of the <sup>86</sup>Kr(<i>α</i>, <i>n</i>)<sup>89</sup>Sr Reaction Cross Section and Its Impact on Weak <i>R</i>-process Nucleosynthesis
Low-energy Measurement of the <sup>86</sup>Kr(<i>α</i>, <i>n</i>)<sup>89</sup>Sr Reaction Cross Section and Its Impact on Weak <i>R</i>-process Nucleosynthesis Open
The cross section of the 86 Kr( α , n ) 89 Sr reaction was measured at low energies using the activation technique via the detection of the β − emission from the residual 89 Sr nuclei. The theoretical analysis of the measured cross section…
Complete survey of r-process conditions: the (un-)robustness of the r-process(-es) Open
Heavy elements are synthesized by the r-process in neutron star mergers and potentially in rare supernovae linked to strong magnetic fields. Expensive hydrodynamic simulations of these extreme environments are usually post-processed to cal…
View article: Impact of Newly Measured <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>β</mml:mi></mml:math>-Delayed Neutron Emitters around <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Ni</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>78</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math> on Light Element Nucleosynthesis in the Neutrino Wind Following a Neutron Star Merger
Impact of Newly Measured -Delayed Neutron Emitters around on Light Element Nucleosynthesis in the Neutrino Wind Following a Neutron Star Merger Open
Neutron emission probabilities and half-lives of 37 β-delayed neutron emitters from Ni75 to Br92 were measured at the RIKEN Nishina Center in Japan, including 11 one-neutron and 13 two-neutron emission probabilities and six half-lives for …
$^{56}$Ni production in long-lived binary neutron star merger remnants Open
We investigate the nucleosynthesis and kilonova emission based on numerical-relativity binary neutron star merger simulations that incorporate a two-moment neutrino-transport scheme. Unlike in previous works with simpler neutrino treatment…
Modeling the emission lines from r-process elements in Supernova nebulae Open
The origin of heavy r-process elements in the universe is still a matter of great debate, with a confirmed scenario being neutron star (NS) mergers. Additional relevant sites could be specific classes of events, such as gamma-ray burst (GR…
Chemical Evolution of R-process Elements in Stars (CERES) Open
Context. The third r-process peak (Os, Ir, Pt) is poorly understood due to observational challenges, with spectral lines located in the blue or near-ultraviolet region of stellar spectra. These challenges need to be overcome for a better u…
Neutrino-driven core-collapse supernova yields in Galactic chemical evolution Open
We provide yields from 189 neutrino-driven core-collapse supernova (CCSN) simulations covering zero-age main sequence masses between 11 and $75\ \mathrm{M}_\odot$ and three different metallicities. Our CCSN simulations have two main advant…
Chemical Evolution of R-process Elements in Stars (CERES): IV. An observational run-up of the third r-process peak with Hf, Os, Ir, and Pt Open
The third r-process peak (Os, Ir, Pt) is poorly understood due to observational challenges, with spectral lines located in the blue or near-ultraviolet region of stellar spectra. These challenges need to be overcome for a better understand…
Impact of nuclear matter properties on the nucleosynthesis and the kilonova from binary neutron star merger ejecta Open
Material expelled from binary neutron star (BNS) mergers can harbour r-process nucleosynthesis and power a kilonova (KN), both intimately related to the astrophysical conditions of the ejection. In turn such conditions indirectly depend on…
Do not forget the electrons: Extending moderately-sized nuclear networks for multidimensional hydrodynamic codes Open
Context. Nuclear networks are widely used coupled with hydrodynamical simulations of explosive scenarios to account for the change of nuclear species and energy generation rate due to nuclear reactions. In this way, there is a feedback mec…
Neutrino-driven Core-collapse Supernova Yields in Galactic Chemical Evolution Open
We provide yields from 189 neutrino-driven core-collapse supernova (CCSN) simulations covering zero-age main sequence masses between 11 and 75 solar masses and three different metallicities. Our CCSN simulations have two main advantages co…
Impact of nuclear matter properties on the nucleosynthesis and the kilonova from binary neutron star merger ejecta Open
Material expelled from binary neutron star (BNS) mergers can harbor r-process nucleosynthesis and power a Kilonova (KN), both intimately related to the astrophysical conditions of the ejection. In turn such conditions indirectly depend on …
View article: Neutrino-driven Outflows and the Elemental Abundance Patterns of Very Metal-poor Stars
Neutrino-driven Outflows and the Elemental Abundance Patterns of Very Metal-poor Stars Open
The elemental abundances between strontium and silver ( Z = 38–47) observed in the atmospheres of very metal-poor stars in the Galaxy may contain the fingerprint of the weak r -process and ν p -process occurring in early core-collapse supe…
Nucleosynthesis in magnetorotational supernovae: impact of the magnetic field configuration Open
The production of heavy elements is one of the main by-products of the explosive end of massive stars. A long sought goal is finding differentiated patterns in the nucleosynthesis yields, which could permit identifying a number of properti…
Nucleosynthesis in neutrino-driven winds: Influence of the nuclear physics input Open
We have performed hydrodynamical simulations of the long-time evolution of proto-neutron stars to study the nucleosynthesis using the resulting wind trajectories. Although the conditions found in the present wind models are not favourable …
View article: Neutrino-Driven Outflows and the Elemental Abundance Patterns of Very Metal-Poor Stars
Neutrino-Driven Outflows and the Elemental Abundance Patterns of Very Metal-Poor Stars Open
The elemental abundances between strontium and silver ($Z = 38-47$) observed in the atmospheres of very metal-poor stars (VMP) in the Galaxy may contain the fingerprint of the weak $r$-process and $νp$-process occurring in early core-colla…
Effects of nuclear matter properties in neutron star mergers Open
The dynamics in mergers of binary neutron star (BNS) systems depend sensitively on the equation of state (EOS) of dense matter. This has profound implications on the emission of gravitational waves (GWs) and the ejection of matter in the m…
View article: The Nuclear Reaction Network WinNet
The Nuclear Reaction Network WinNet Open
We present the state-of-the-art single-zone nuclear reaction network WinNet , which is capable of calculating the nucleosynthetic yields of a large variety of astrophysical environments and conditions. This ranges from the calculation of t…
Effects of nuclear matter properties in neutron star mergers Open
The dynamics in mergers of binary neutron star (BNS) systems depend sensitively on the equation of state (EOS) of dense matter. This has profound implications on the emission of gravitational waves (GWs) and the ejection of matter in the m…
View article: Using (α, xn) reaction rates and abundance ratios to constrain the weak r-process
Using (α, xn) reaction rates and abundance ratios to constrain the weak r-process Open
The lighter heavy elements of the first r-process peak, between strontium and silver, can be synthesized in the moderately neutron-rich neutrino–driven ejecta of either core–collapse supernovae or neutron star mergers via the weak r–proces…
Core-collapse Supernova Simulations with Reduced Nucleosynthesis Networks Open
We present core-collapse supernova simulations including nuclear reaction networks that impact explosion dynamics and nucleosynthesis. The different composition treatment can lead to changes in the neutrino heating in the vicinity of the s…
View article: The nuclear reaction network WinNet
The nuclear reaction network WinNet Open
We present the state-of-the-art single-zone nuclear reaction network WinNet that is capable of calculating the nucleosynthetic yields of a large variety of astrophysical environments and conditions. This ranges from the calculation of the …
View article: Constraining nucleosythesis in neutrino-driven winds using the impact of (<i>α</i>, xn) reaction rates
Constraining nucleosythesis in neutrino-driven winds using the impact of (<i>α</i>, xn) reaction rates Open
The lighter heavy elements of the first r-process peak, between strontium and silver, can be synthesized in the moderately neutron-rich neutrino–driven ejecta of either core–collapse supernovae or neutron star mergers via the weak r–proces…
Origin of the elements Open
What is the origin of the oxygen we breathe, the hydrogen and oxygen (in form of water H 2 O) in rivers and oceans, the carbon in all organic compounds, the silicon in electronic hardware, the calcium in our bones, the iron in steel, silve…
View article: Magnetorotational supernovae: a nucleosynthetic analysis of sophisticated 3D models
Magnetorotational supernovae: a nucleosynthetic analysis of sophisticated 3D models Open
Magnetorotational supernovae are a rare type of core-collapse supernovae where the magnetic field and rotation play a central role in the dynamics of the explosion. We present the post-processed nucleosynthesis of state-of-the-art neutrino…
Core-collapse supernova simulations with reduced nucleosynthesis networks Open
We present core-collapse supernova simulations including nuclear reaction networks that impact explosion dynamics and nucleosynthesis. The different composition treatment can lead to changes in the neutrino heating in the vicinity of the s…
Constraining Nucleosynthesis in Neutrino-driven Winds: Observations, Simulations, and Nuclear Physics Open
A promising astrophysical site to produce the lighter heavy elements of the first r -process peak ( Z = 38 − 47) is the moderately neutron-rich (0.4 < Y e < 0.5) neutrino-driven ejecta of explosive environments, such as core-collapse super…