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We present a new sample of Compact Steep Spectrum (CSS) sources with radio luminosity below 10^26 W/Hz at 1.4 GHz called the low luminosity compact (LLC) objects. The sources have been selected from FIRST survey and observed with MERLIN at…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 M. Kunert-Bajraszewska , M. P. Gawronski , A. Labiano , A. Siemiginowska

In this paper, we propose a scheme to generate tunable multi-color attosecond coherent X-ray radiation for future light source applications. This scheme uses an energy chirped electron beam, a laser modulators, a laser chirper and two bunch…

Accelerator Physics · Physics 2015-05-27 Ji Qiang , Juhao Wu

We report on the superior vortex pinning of single and multilayer Ba(Fe1-xCox)2As2 thin films with self-assembled c-axis and artificially introduced ab-plane pins. Ba(Fe1-xCox)2As2 can accept a very high density of pins (15-20 vol%) without…

Dwarf Novae and low-mass X-ray binaries are eruptive binary systems comprised of a Roche-lobe overflowing solar-type star and an accreting compact object. Their recurrence time can be explained by a low-accreting phase, the quiescence,…

High Energy Astrophysical Phenomena · Physics 2026-01-13 Marc Van den Bossche , Geoffroy Lesur , Guillaume Dubus

The current state of the art in fast timing resolution for existing experiments is of the order of 100 ps on the time of arrival of both charged particles and electromagnetic showers. Current R&D on charged particle timing is approaching…

A compact Inverse Compton Light Source (ICLS) design is presented, with flux and brilliance orders of magnitude beyond conventional laboratory-scale sources and other compact ICLS designs. This design utilizes the physics of inverse Compton…

Accelerator Physics · Physics 2018-08-29 K. E. Deitrick , G. A. Krafft , B. Terzić , J. R. Delayen

The radiation pressure acceleration (RPA) of charged particles has been considered a challenging task in laser particle acceleration. Laser-driven proton/ion acceleration has attracted considerable interests due to its underlying physics…

The properties of the orbit and the donor star in the high mass X-ray binary microquasar LS 5039 indicate that accretion processes should mainly occur via a radiatively driven wind. In such a scenario, significant X-ray variability would be…

Astrophysics · Physics 2007-05-23 V. Bosch-Ramon , J. M. Paredes , M. Ribo , J. M. Miller , P. Reig , J. Marti

Laser-driven (LD) ion acceleration has been explored in a newly constructed short focal length beamline at the BELLA petawatt facility (interaction point 2, iP2). For applications utilizing such LD ion beams, a beam transport system is…

We found that transport critical current density (Jc) of the Ba1-xKxFe2As2/Ag tapes is significantly enhanced by the combination process of cold flat rolling and uniaxial pressing. At 4.2 K, the Jc reaches a high value of 9.1x104 A/cm2 in 4…

Superconductivity · Physics 2013-10-18 Zhaoshun Gao , Kazumasa Togano , Akiyoshi Matsumoto , Hiroaki Kumakura

The neutron star low mass X-ray binary (LMXB) AX J1745.6-2901 was detected an anomalously fast decrease of orbital period. The decreasing rate of orbital period exceeds the contribution of all processes extracting angular momentum from the…

High Energy Astrophysical Phenomena · Physics 2022-07-12 A. I. Bogomazov , A. M. Cherepashchuk , T. S. Khruzina , A. V. Tutukov

We theoretically investigate a scheme for generations of single hard X-ray pulses of controllable duration in the range of 1 ns - 100 ns from a radioactive M\"ossbauer source. The scheme uses a magnetically perturbed $^{57}$FeBO$_3$ crystal…

Quantum Physics · Physics 2018-07-10 Guan-Ying Wang , Wen-Te Liao

The radiatively driven wind of the primary star in wind-fed X-ray binaries can be suppressed by the X-ray irradiation of the compact secondary star. This causes feedback between the wind and the X-ray luminosity of the compact star. We…

High Energy Astrophysical Phenomena · Physics 2021-06-02 Osmi Vilhu , Timothy R. Kallman , Karri I. Koljonen , Diana C. Hannikainen

Large Area X-ray Propositional Counter (LAXPC) instrument on AstroSat is aimed at providing high time resolution X-ray observations in 3 to 80 keV energy band with moderate energy resolution. To achieve large collecting area, a cluster of…

We consider the radiative acceleration to relativistic bulk velocities of a cold, optically thin plasma which is exposed to an external source of gamma-rays. The flow is driven by radiative momentum input to the gas, the accelerating force…

Astrophysics · Physics 2009-10-31 Piero Madau , Christopher Thompson

We have carried out radiation-hydrodynamic simulations of thermally-driven accretion disc winds in low-mass X-ray binaries. Our main goal is to study the luminosity dependence of these outflows and compare with observations. The simulations…

High Energy Astrophysical Phenomena · Physics 2019-02-13 Nick Higginbottom , Christian Knigge , Knox S. Long , James H. Matthews , Edward J. Parkinson

This paper reports a newly developed high current transformer-rectifier High-Tc Superconducting (HTS) flux pump switched by dynamic resistance. A quasi-persistent current of over 1.1 kA has been achieved at 77 K using the device, which is…

We show the best current simulations of the absorption and emission features predicted from thermal-radiative winds produced from X-ray illumination of the outer accretion disc in binary systems. We use the density and velocity structure…

High Energy Astrophysical Phenomena · Physics 2020-04-22 Ryota Tomaru , Chris Done , Ken Ohsuga , Hirokazu Odaka , Tadayuki Takahashi

The low mass X-ray binary 2A 1822-371 is an eclipsing system with an accretion disc corona and with an orbital period of 5.57 hr. The primary is an 0.59 s X-ray pulsar with a proposed strong magnetic field of 10^10-10^12 G. In this paper we…

High Energy Astrophysical Phenomena · Physics 2017-04-12 A. Bak Nielsen , A. Patruno , C. D'Angelo

The origin of accretion disc winds remains disputed to date. High inclination, dipping, neutron star Low Mass X-Ray Binaries (LMXBs) provide an excellent testbed to study the launching mechanism of such winds due to being persistently…

High Energy Astrophysical Phenomena · Physics 2026-04-01 M. Díaz Trigo , E. Caruso , E. Costantini , T. Dotani , T. Kohmura , M. Shidatsu , M. Tsujimoto , T. Yoneyama , J. Neilsen , T. Yaqoob , J. M. Miller