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The properties of the population of compact objects created in core-collapse supernovae (SNe) are uncertain. X-ray observations years to decades after the explosions offer a way to gain insight into this, as hard X-ray emission from the…

High Energy Astrophysical Phenomena · Physics 2025-11-06 Julia Ahlvind , Josefin Larsson , Dennis Alp

In recent years, the number of pulsars with secure mass measurements has increased to a level that allows us to probe the underlying neutron star (NS) mass distribution in detail. We critically review the radio pulsar mass measurements. For…

Solar and Stellar Astrophysics · Physics 2016-02-09 Bulent Kiziltan , Athanasios Kottas , Maria De Yoreo , Stephen E. Thorsett

To understand how rich dynamics emerge in neural populations, we require models exhibiting a wide range of activity patterns while remaining interpretable in terms of connectivity and single-neuron dynamics. However, it has been challenging…

Neurons and Cognition · Quantitative Biology 2020-03-10 Alexandre René , André Longtin , Jakob H. Macke

Sampling-based inference techniques are central to modern cosmological data analysis; these methods, however, scale poorly with dimensionality and typically require approximate or intractable likelihoods. In this paper we describe how…

Cosmology and Nongalactic Astrophysics · Physics 2022-11-09 Alex Cole , Benjamin Kurt Miller , Samuel J. Witte , Maxwell X. Cai , Meiert W. Grootes , Francesco Nattino , Christoph Weniger

Extracting Times of Arrival from pulsar radio signals depends on the knowledge of the pulsars pulse profile and how this template is generated. We examine pulsar template generation with Bayesian methods. We will contrast the classical…

Instrumentation and Methods for Astrophysics · Physics 2015-06-23 M. Imgrund , D. J. Champion , M. Kramer , H. Lesch

Inspired by increase of population of $\gamma$-ray emitting pulsars by the $Fermi$ telescope, we perform a population study for $\gamma$-ray emitting canonical pulsars. We use a Monte-Carlo technique to simulate the Galactic population of…

High Energy Astrophysical Phenomena · Physics 2015-05-20 J. Takata , Y. Wang , K. S. Cheng

Pulsar timing arrays (PTAs) perform Bayesian posterior inference with expensive MCMC methods. Given a dataset of ~10-100 pulsars and O(10^3) timing residuals each, producing a posterior distribution for the stochastic gravitational wave…

Instrumentation and Methods for Astrophysics · Physics 2023-10-20 David Shih , Marat Freytsis , Stephen R. Taylor , Jeff A. Dror , Nolan Smyth

We exploit the great potential offered by Bayesian Neural Networks (BNNs) to directly decipher the internal composition of neutron stars (NSs) based on their macroscopic properties. By analyzing a set of simulated observations, namely NS…

Nuclear Theory · Physics 2023-09-15 Valéria Carvalho , Márcio Ferreira , Tuhin Malik , Constança Providência

With recent advances in the sensitivity of radio surveys of the Galactic disk, the number of millisecond pulsars (MSPs) has increased substantially in recent years such that it is now possible to study their demographic properties in more…

High Energy Astrophysical Phenomena · Physics 2022-03-14 Kshitij Aggarwal , Duncan. R. Lorimer

We present the second and final set of TRAPUM searches for pulsars at 1284 MHz inside supernova remnants and pulsar wind nebulae with the MeerKAT telescope. No new pulsars were detected for any of the 80 targets, which include some…

We explore the hypothesis that the magnetic fields of neutron stars are of fossil origin. For parametrised models of the distribution of magnetic flux on the Main Sequence and of the birth spin period of the neutron stars, we calculate the…

Astrophysics · Physics 2009-11-11 Lilia Ferrario , Dayal Wickramasinghe

Stellar population studies provide unique clues to constrain galaxy formation models. So far, detailed studies based on absorption line strengths have mainly focused on the optical spectral range although many diagnostic features are…

Astrophysics of Galaxies · Physics 2022-05-27 Elham Eftekhari , Alexandre Vazdekis , Francesco La Barbera

There have been 77 TNOs discovered to be librating in the distant transneptunian resonances (beyond the 2:1 resonance, at semimajor axes greater than 47.7~AU) in four well-characterized surveys: the Outer Solar System Origins Survey (OSSOS)…

Earth and Planetary Astrophysics · Physics 2022-04-21 B. L. Crompvoets , S. M. Lawler , K. Volk , Y. -T. Chen , B. Gladman , L. Peltier , M. Alexandersen , M. T. Bannister , S. Gwyn , J. J. Kavelaars , J. -M. Petit

Many pulsar folding algorithms are currently deployed to generate strong SNRs for the total intensity profiles. But they require large observation times to improve the SNR effectively. New approaches to de-noise the pulsar total intensity…

High Energy Astrophysical Phenomena · Physics 2021-08-03 Amitesh Singh , Kamlesh N Pathak

Binary population synthesis is the method by which predictions of varied observables of stellar populations can be made from theoretical models of binary stellar evolution. Binary stars have many more possible evolutionary outcomes compared…

Solar and Stellar Astrophysics · Physics 2020-06-15 J. J. Eldridge

Rapidly growing catalogs of compact binary mergers from advanced gravitational-wave detectors allow us to explore the astrophysics of massive stellar binaries. Merger observations can constrain the uncertain parameters that describe the…

Solar and Stellar Astrophysics · Physics 2023-06-28 Jeff Riley , Ilya Mandel

In this dissertation, we estimate the population of different classes of BNS systems that are visible to gravitational-wave observatories. Given that no ultra-compact BNS systems have been discovered in pulsar radio surveys, we place a 95\%…

High Energy Astrophysical Phenomena · Physics 2020-08-12 Nihan Pol

We have produced a new software package for the simulation of pulsar populations, \textsc{PsrPopPy}, based on the \textsc{Psrpop} package. The codebase has been re-written in Python (save for some external libraries, which remain in their…

Instrumentation and Methods for Astrophysics · Physics 2015-06-17 Sam Bates , Duncan Lorimer , Akshaya Rane , Joe Swiggum

We have used millisecond pulsars (MSPs) from the southern High Time Resolution Universe (HTRU) intermediate latitude survey area to simulate the distribution and total population of MSPs in the Galaxy. Our model makes use of the scale…

Fast Radio Bursts (FRBs) are radio transients of an unknown origin. Naturally, we are curious as to their nature. Enough FRBs have been detected for a statistical approach to parts of this challenge to be feasible. To understand the crucial…

High Energy Astrophysical Phenomena · Physics 2019-12-18 D. W. Gardenier , J. van Leeuwen , L. Connor , E. Petroff