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Anomalous X-ray pulsars and soft gamma repeaters are slowly rotating, young, and isolated neutron stars exhibiting sporadic outbursts and high X-ray quiescent luminosities. They are believed to be powered by ultrastrong magnetic fields,…

High Energy Astrophysical Phenomena · Physics 2021-06-02 Tushar Mondal

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

We assemble a census of the most massive stars in Orion, then use stellar isochrones to estimate their masses and ages, and use these results to establish the stellar content of Orion's individual OB associations. From this, our new…

Astrophysics of Galaxies · Physics 2015-05-19 R. Voss , R. Diehl , J. S. Vink , D. H. Hartmann

The observed sample of double neutron-star (NS-NS) binaries presents a challenge to population-synthesis models of compact object formation: the parameters entering into these models must be carefully chosen so as to match (i) the observed…

Astrophysics · Physics 2009-04-03 R. O'Shaughnessy , C. Kim , T. Frakgos , V. Kalogera , K. Belczynski

We have carried out a detailed study of symbiotic stars with white dwarf accretors by means of a population synthesis code. We estimate the total number of symbiotic stars with white dwarf accretors in the Galaxy as 1,200 - 15,000. This…

Astrophysics · Physics 2009-11-11 Guoliang Lu , Lev Yungelson , Zhanwen Han

Population synthesis is used to study the contribution from undetected sources to the Galactic ridge emission measured by EGRET. Synthesized source counts are compared with the 3rd EGRET catalogue at low and high latitudes. For pulsar-like…

Astrophysics · Physics 2008-11-26 A. W. Strong

With the increasing number of exoplanets discovered, statistical properties of the population as a whole become unique constraints on planet formation models provided a link between the description of the detailed processes playing a role…

Earth and Planetary Astrophysics · Physics 2015-06-18 W. Benz , S. Ida , Y. Alibert , D. N. C. Lin , C. Mordasini

We postulate that most stars are born in aggregates of binary systems which are dynamically equivalent to the `dominant mode cluster'. The initial binary orbits are consitent with pre-main sequence data. Stellar masses are paired at random…

Astrophysics · Physics 2015-06-24 Pavel Kroupa

A newly born millisecond magnetar has been proposed as one possible central engine of some GRBs with X-ray plateau emission. In this work, we systematically analyzed the Swift/XRT data of long GRBs with plateau emission that were detected…

High Energy Astrophysical Phenomena · Physics 2025-09-04 Lin Lan , He Gao , Shunke Ai , Wen-Jin Xie , Yong Yuan , Long Li , Li-Ping Xin , Jian-Yan Wei

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

The population of $\gamma$-ray emitting millisecond pulsars (MSPs) is studied by using Monte-Carlo techniques. We simulate the Galactic distributions of the MSPs, and apply the outer gap model for the $\gamma$-ray emission from each…

High Energy Astrophysical Phenomena · Physics 2017-02-22 J. Takata , Y. Wang , K. S. Cheng

The paucity of old isolated accreting neutron stars in ROSAT observations is used to derive a lower limit on the mean velocity of neutron stars at birth. The secular evolution of the population is simulated following the paths of a…

Astrophysics · Physics 2009-10-31 S. B. Popov , M. Colpi , A. Treves , R. Turolla , V. M. Lipunov , M. E. Prokhorov

We explore in this paper the ability to constrain the Galactic magnetic field intensity and spatial distribution with the incoming data from the Planck satellite experiment. We perform realistic simulations of the Planck observations at the…

Astrophysics of Galaxies · Physics 2015-06-03 L. Fauvet , J. F. Macías-Pérez , T. R. Jaffe , A. J. Banday , F. -X. Désert , D. Santos

We study the prospects for detection of continuous gravitational signals from "normal" Galactic neutron stars, i.e. non-recycled ones. We use a synthetic population generated by evolving stellar remnants in time, according to several…

General Relativity and Quantum Cosmology · Physics 2023-08-02 Gianluca Pagliaro , Maria Alessandra Papa , Jing Ming , Jianhui Lian , Daichi Tsuna , Claudia Maraston , Daniel Thomas

One of the distinctive properties of magnetars, young neutron stars powered mainly by magnetic energy, is the emission of short ($\lesssim$1 s) bursts of hard X-rays. Such bursts have been observed in nearly all the known magnetars,…

High Energy Astrophysical Phenomena · Physics 2025-12-17 Dominik P. Pacholski , Sandro Mereghetti , Martin Topinka

On the basis of the PSRPOPPY software package, we developed an evolution model of population synthesis for isolated radio pulsars by incorporating the fan beam model, an alternative radio emission beam model to the widely used conal beam…

High Energy Astrophysical Phenomena · Physics 2021-01-06 W. J. Huang , H. G. Wang

Binary stars consisting of a white dwarf and a main sequence star (WDMS) are valuable for studying key astrophysical questions. However, observational biases strongly affect the known population, particularly unresolved systems where the…

Solar and Stellar Astrophysics · Physics 2025-03-19 Alejandro Santos-García , Santiago Torres , Alberto Rebassa-Mansergas , Alex J. Brown

Magnetars are young neutron stars with extreme magnetic fields (B > 10^{14}-10^{15}G). How these fields relate to the properties of their progenitor stars is not yet clearly established. However, from the few objects associated with young…

Solar and Stellar Astrophysics · Physics 2014-11-20 Ben Davies , Don F. Figer , Rolf-Peter Kudritzki , Christine Trombley , Chryssa Kouveliotou , Stefanie Wachter

The Fermi Large Area Telescope (Fermi-LAT) has recently revealed a large population of gamma-ray emitting millisecond pulsars (MSPs) in our Galaxy. We aim to infer the properties of the Galactic population of gamma-ray emitting MSPs from…

Astrophysics of Galaxies · Physics 2015-06-15 Tristan Grégoire , Jürgen Knödlseder

Magnetar giant flares (MGFs) are rare, extremely bright bursts of gamma-rays from highly magnetized neutron stars. These events are challenging to identify because, at extragalactic distances, they can appear similar to other astrophysical…

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