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Context.This is the first paper of a series aiming to determine the fractions and birth rates of various types of supernovae (SNe) in the local Universe. Aims. In this paper, we aim to construct a complete sample of SNe in the nearby…

The net-baryon number probability distribution and the related pressure and density are studied in the Cluster Expansion Model (CEM) and the obtained results are extrapolated to the domain of low temperatures. It is found that the rate of…

High Energy Physics - Phenomenology · Physics 2024-12-30 R. N. Rogalyov , V. A. Goy

We use perturbation theory and the relativistic Cowling approximation to numerically compute characteristic oscillation modes of rapidly rotating relativistic stars which consist of a perfect fluid obeying a polytropic equation of state. We…

General Relativity and Quantum Cosmology · Physics 2014-11-17 Stratos Boutloukos , Hans-Peter Nollert

One of the central problems in supernova theory is the question how massive stars explode. Understanding the physical processes that drive the explosion is crucial for linking the stellar progenitors to the final remnants and for predicting…

Astrophysics · Physics 2007-05-23 H. -Th. Janka , R. Buras , K. Kifonidis , M. Rampp , T. Plewa

Recent studies have shown how the distribution of $^{56}$Ni within the ejecta of type Ia supernovae can have profound consequences on the observed light curves. Observations at early times can therefore provide important details on the…

High Energy Astrophysical Phenomena · Physics 2020-02-05 M. R. Magee , K. Maguire , R. Kotak , S. A. Sim , J. H. Gillanders , S. J. Prentice , K. Skillen

Postulating that increasing linear energy transfer (LET) causes non-random clustering of lethal lesions to deviate from the Poisson distribution, we employ a non-Poisson approach as a more flexible alternative that accounts for…

Medical Physics · Physics 2020-09-22 M. Loan , M. Alameen , A. Bhat , M. Tantary

The search for a space-time variation of the fundamental constants has been explored over the years to test our physical theories. In this paper, we use the dispersion measure ($DM$) of fast radio bursts (FRB) combined with type Ia…

Cosmology and Nongalactic Astrophysics · Physics 2025-01-24 Thais Lemos , Rodrigo Gonçalves , Joel Carvalho , Jailson Alcaniz

Type Ia supernovae are bright stellar explosions thought to occur when a thermonuclear runaway consumes roughly a solar mass of degenerate stellar material. These events produce and disseminate iron-peak elements, and properties of their…

Type Ia Supernovae (SNe Ia) have become the most precise distance indicators in astrophysics due to their incredible observational homogeneity. Increasing discovery rates, however, have revealed multiple sub-populations with spectroscopic…

Instrumentation and Methods for Astrophysics · Physics 2025-05-07 Yunyi Shen , Alexander T. Gagliano

Linear functions of the site frequency spectrum (SFS) play a major role for understanding and investigating genetic diversity. Estimators of the mutation rate (e.g. based on the total number of segregating sites or average of the pairwise…

Methodology · Statistics 2021-01-14 Asger Hobolth , Mogens Bladt , Lars Nørvang Andersen

Quantal diffusion mechanism of nucleon exchange is studied in the central collisions of several symmetric heavy-ion collisions in the framework of the Stochastic Mean-Field (SMF) approach. Since at bombarding energies below the fusion…

Nuclear Theory · Physics 2016-11-23 S. Ayik , O. Yilmaz , B. Yilmaz , A. S. Umar

We introduce Sequential Neural Posterior Score Estimation (SNPSE), a score-based method for Bayesian inference in simulator-based models. Our method, inspired by the remarkable success of score-based methods in generative modelling,…

Machine Learning · Statistics 2024-06-04 Louis Sharrock , Jack Simons , Song Liu , Mark Beaumont

This paper proposes a new approach for the selection of low-energy neutrino bursts, such as the ones detected after a supernova. It exploits the temporal structure of the expected signal with respect to the more diffuse background by…

High Energy Astrophysical Phenomena · Physics 2021-10-20 Mathieu Lamoureux

Spiking neural networks (SNNs) has attracted much attention due to its great potential of modeling time-dependent signals. The firing rate of spiking neurons is decided by control rate which is fixed manually in advance, and thus, whether…

Neural and Evolutionary Computing · Computer Science 2021-06-28 Shao-Qun Zhang , Zhao-Yu Zhang , Zhi-Hua Zhou

One of the robust features found in simulations of core-collapse supernovae (SNe) is the prompt neutronization burst, i.e. the first $\sim 25$ milliseconds after bounce when the SN emits with very high luminosity mainly $\nu_e$ neutrinos.…

Astrophysics · Physics 2016-08-30 M. Kachelriess , R. Tomas , R. Buras , H. -Th. Janka , A. Marek , M. Rampp

We analyze here in details the probability to find a given number of particles in a finite volume inside a normal or superfluid finite system. This probability, also known as counting statistics, is obtained using projection operator…

Nuclear Theory · Physics 2020-01-22 Denis Lacroix , Sakir Ayik

We present a numerical investigation of the cellular burning regime in Type Ia supernova explosions. This regime holds at small scales (i.e. below the Gibson scale), which are unresolved in large-scale Type Ia supernova simulations. The…

Astrophysics · Physics 2009-11-10 F. K. Roepke , W. Hillebrandt , J. C. Niemeyer

We present an empirical method which measures the distance to a Type Ia supernova (SN Ia) with a precision of ~ 10% from a single night's data. This method measures the supernova's age and luminosity/light-curve parameter from a spectrum,…

Fission fragments' charge and mass distribution is an important input to applications ranging from basic science to energy production or nuclear non-proliferation. In simulations of nucleosynthesis or calculations of superheavy elements,…

Nuclear Theory · Physics 2021-05-12 Marc Verriere , David Regnier , Nicolas Schunck

The spatial dispersion of the single-nucleon wave functions is analyzed using the self-consistent mean-field framework based on nuclear energy density functionals, and with the harmonic oscillator approximation for the nuclear potential. It…

Nuclear Theory · Physics 2018-06-20 J. -P. Ebran , E. Khan , R. -D Lasseri , D. Vretenar