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Millisecond Pulsar Population in the Galactic Center and High Energy Contributions

W Wang
2006 Chinese Journal of Astronomy and Astrophysics  
In the same time, the compact wind nebulae around millisecond pulsars can emit X-rays though synchrotron radiation and TeV photons through inverse Compton processes.  ...  Besides, millisecond pulsar winds provide good candidates for the electron-positrons sources in the Galactic center.  ...  The binary population synthesis in the GC (Taam 2005, private communication) shows more than 200 MSPs are produced through recycle scenario and stay in the Muno's region.  ... 
doi:10.1088/1009-9271/6/s2/50 fatcat:yoekf7di6zc65h3ooucgrjrloq

Millisecond pulsar population in the Galactic center and high energy contributions [article]

W. Wang
2005 arXiv   pre-print
In the same time, the compact wind nebulae around millisecond pulsars can emit X-rays though synchrotron radiation and TeV photons through inverse Compton processes.  ...  Besides, millisecond pulsar winds provide good candidates for the electron-positrons sources in the Galactic center.  ...  The binary population synthesis in the GC (Taam 2005, private communication) shows more than 200 MSPs are produced through recycle scenario and stay in the Muno's region.  ... 
arXiv:astro-ph/0510461v1 fatcat:bc2tw2ft2fcuxjizzjkclqps6u

Nonthermal X‐Ray Emission from the Shell‐Type Supernova Remnant G347.3−0.5

Patrick Slane, Bryan M. Gaensler, T. M. Dame, John P. Hughes, Paul P. Plucinsky, Anne Green
1999 Astrophysical Journal  
We show that our observations are broadly consistent with a scenario that has most of the supernova remnant shock wave still within the stellar wind bubble of its progenitor star, while part of it appears  ...  A point source at the center of the remnant has spectral properties similar to those expected for a neutron star and may represent the compact relic of the supernova progenitor.  ...  H. acknowledges support through NASA grants NAG5-4794 and NAG5-4871.  ... 
doi:10.1086/307893 fatcat:yhhwlycrs5b7dgmy37pavg5oke

X-ray Spectroscopy of Ejecta and Compact Objects in Supernova Remnants [article]

Emanuele Greco
2021 arXiv   pre-print
This thesis is devoted to the analysis of X-ray observations of supernova remnants (SNRs), exploiting the diagnostic potential provided by X-ray spectroscopy and complementing it with the synthesis of  ...  I tackle three open issues: the search for a spectral signature to correctly recover abundance and mass values of the stellar fragments ejected in the SN explosion through their X-ray spectra; the study  ...  X-ray spectral analysis of shocked ejecta can be a powerful tool to recover the yields produced by SN explosions.  ... 
arXiv:2103.16950v1 fatcat:5w5bhl26uzh3pav7ydaojgemm4

Applications of Stellar Population Synthesis in the Distant Universe

Elizabeth R. Stanway
2020 Galaxies  
Stellar population synthesis models are now used as the foundation of analysis at all redshifts, but are not without their problems.  ...  Here we review the use of stellar population synthesis models, with a focus on applications in the distant Universe.  ...  Improving Population Synthesis Models Stellar population and spectral synthesis models have proven extremely powerful in interpreting the light from galaxies in the low redshift (<z ≈ 1) universe [77]  ... 
doi:10.3390/galaxies8010006 fatcat:oxn7uoof2jf2hoh4v4adcpqmbi

A search for radio afterglows from gamma-ray bursts with the Australian Square Kilometre Array Pathfinder [article]

James K. Leung, Tara Murphy, Giancarlo Ghirlanda, David L. Kaplan, Emil Lenc, Dougal Dobie, Julie Banfield, Catherine Hale, Aidan Hotan, David McConnell, Vanessa A. Moss, Joshua Pritchard (+3 others)
2021 arXiv   pre-print
Finally, we derived semi-analytical estimates for the microphysical shock parameters of the burst: electron power-law index p = 2.84, normalised wind-density parameter A_* = 3, fractional energy in electrons  ...  the analysis of optical images.  ...  TM acknowledges the support of the Australian Research Council through grants FT150100099 and DP190100561. DK is supported by NSF grant AST-1816492.  ... 
arXiv:2102.01948v1 fatcat:tsdnnbeqlrberc33je7wad3cnm

Starburst and old stellar populations in two z=3.8 radio galaxies 4C 41.17 and TN J2007-1316 [article]

Brigitte Rocca-Volmerange, Guillaume Drouart, Carlos De Breuck, Joel Vernet, Nicholas Seymour, Domenika Wylezalek, Matthew Lehnert, Nicole Nesvadba, Michel Fioc
2013 arXiv   pre-print
The new evolutionary code Pegase.3 is used for the spectral synthesis of continuous optical-Spitzer-Herschel-submm spectral energy distributions (SEDs) of two z=3.8 radio galaxies 4C 41.17 and TN J2007  ...  The spectral synthesis used to fit the data is based on a variety of template libraries including instantaneous starbursts and evolutionary scenarios designed to fit the SEDs of local Hubble-type galaxies  ...  The most robust determinations from our fitting analysis are the relative ages and total stellar mass of each best fit scenario.  ... 
arXiv:1301.1983v1 fatcat:mduwpwd53bhohhouitq6dyxve4

The impact of winds on the spectral appearance of Red Supergiants [article]

Ben Davies
2021 arXiv   pre-print
Thirdly, we show that wind fluctuations can explain the spectral variability of Betelgeuse during its recent dimming, without the need for dust.  ...  The inclusion of a wind has two important effects.  ...  In this paper we present an initial study in which we take the first steps towards spectral synthesis of RSG winds.  ... 
arXiv:2109.05884v1 fatcat:4okoj4o5rzhpnbixto2xsoptea

Synchrotron radiation and absence of linear polarization in the colliding wind binary WR 146

C. A. Hales, P. Benaglia, S. del Palacio, G. E. Romero, B. S. Koribalski
2017 Astronomy and Astrophysics  
In order for this scenario to satisfy the required non-thermal energy budget, we find through numerical modeling that the strength of the magnetic field in the WCR must be as high as ~150 mG.  ...  We therefore favor a scenario where particles are accelerated through DSA and the depolarization is produced by mechanisms other than a large ratio between random to regular magnetic fields.  ...  In any case, the high-energy electrons are expected to obtain a power-law distribution in energy with a spectral index p ∼ 2.  ... 
doi:10.1051/0004-6361/201629644 fatcat:scrhrxy2ofbbtgir7r2qeqbrua

A Wind-Driven Model: Application to Peculiar Transients AT2018cow and iPTF14hls [article]

Kohki Uno, Keiichi Maeda
2020 arXiv   pre-print
Furthermore, the model predicts characteristic spectral features and evolution, which are well in line with those of AT2018cow and iPTF14hls.  ...  In the wind-driven model, we assume that a continuous outflow like a stellar wind is injected from a central system.  ...  Also, spectral synthesis simulations are required to address further details of the spectral evolution. We plan to tackle these issues in our future work.  ... 
arXiv:2003.05795v2 fatcat:6az5a7ihyfgndf2jqcdnqb4clm


Patrick Slane, John P. Hughes, Tea Temim, Romain Rousseau, Daniel Castro, Dillon Foight, B. M. Gaensler, Stefan Funk, Marianne Lemoine-Goumard, Joseph D. Gelfand, David A. Moffett, Richard G. Dodson (+1 others)
2012 Astrophysical Journal  
The observations suggest a relatively young system expanding into a low density region.  ...  MSH 11-62 (G291.1-0.9) is a composite supernova remnant for which radio and X-ray observations have identified the remnant shell as well as its central pulsar wind nebula.  ...  Additional support for science analysis during the operations phase is gratefully acknowledged from the Istituto Nazionale di Astrofisica in Italy and the Centre National d'Études Spatiales in France.  ... 
doi:10.1088/0004-637x/749/2/131 fatcat:2t3qwifvbva7jchskpucmghzf4

Measurement of Spectral Breaks in Pulsar Wind Nebulae with Millimeter‐Wave Interferometry

D. C.‐J. Bock, B. M. Gaensler
2005 Astrophysical Journal  
We have observed pulsar wind nebulae in the three supernova remnants G11.2-0.3, G16.7+0.1, and G29.7-0.3 at 89 GHz with the Berkeley-Illinois-Maryland Association Array, measuring total flux densities  ...  The emission to the north of pulsar J1846-0258 has a broken spectrum, with break frequency ~< 100 GHz, consistent with a conventional pulsar-powered nebula.  ...  This vast reservoir of energy is ultimately deposited into the ambient medium through the pulsar's relativistic wind.  ... 
doi:10.1086/429789 fatcat:ozk6lzpl4ne37oiw26spllk6t4

Stratified Quasar Winds: Integrating X-ray and Infrared Views of Broad Absorption Line Quasars [article]

S. C. Gallagher
2007 arXiv   pre-print
Quasars are notable for the luminous power they emit across decades in frequency from the far-infrared through hard X-rays; emission at different frequencies emerges from physical scales ranging from AUs  ...  We present a stratified wind picture based on a synthesis of multiwavelength research programs designed to constrain the nature of mass ejection from radio-quiet quasars.  ...  Support for S.C.G. was provided by NASA through the Spitzer Fellowship Program, under award 1256317; this project was made possible by Chandra X-Ray Center grant GO4-5113X.  ... 
arXiv:astro-ph/0701076v2 fatcat:lvucyp3hw5bednfja54mz6dqhq

Chandra's X-ray study confirms that the magnetic standard Ap star KQ Vel hosts a neutron star companion [article]

Lidia M. Oskinova, Richard Ignace, Paolo Leto, Konstantin A. Postnov
2020 arXiv   pre-print
Authors are grateful to the anonymous referee for a very useful report which strongly improved the paper, and for the suggestions for future work on this interesting system. Authors thank Dr. H.  ...  Given a large orbital separation, the binarity may be easily missed during a routine spectroscopic analysis. Future work on astrometric catalogs, e.g.  ...  The power-density spectrum was calculated using a Fourier algorithm (Horne & Baliunas 1986 ).  ... 
arXiv:2007.11591v1 fatcat:34le2sctuvgtjiok4fporxwriy

Optical/infrared observations unveiling the formation, nature and evolution of High-Mass X-ray Binaries

Sylvain Chaty
2013 Advances in Space Research  
of an evolutionary link, include comparisons with population synthesis models, and finally build a consistent scenario explaining the various characteristics of these extreme celestial sources.  ...  In this review I first describe the nature of the three kinds of High-Mass X-ray Binaries (HMXBs), accreting through: (i) Be circumstellar disc, (ii) supergiant stellar wind, and (iii) Roche lobe filling  ...  due to the high-mass of the companion star, or through extremely accurate radio measurements that will be available in the future.  ... 
doi:10.1016/j.asr.2013.09.010 fatcat:exqsby7mxzdmpkpy5w54tg32wm
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