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200 papers

We report on a timing programme of 74 young pulsars that have been observed by the Parkes 64-m radio telescope over the past decade. Using modern Bayesian timing techniques, we have measured the properties of 124 glitches in 52 of these…

The time-dependent forcing and work per cycle required to drive sinusoidal spinning of a taut-line buzzer is analytically derived, both on and off resonance, from the nonlinear equation of motion. To test predictions, a model experimental…

Soft Condensed Matter · Physics 2024-07-10 Jesse M. Hanlan , Douglas J. Durian

Feedback controlled ratchets are thermal rectifiers that use information on the state of the system to operate. We study the effects of time delays in the feedback for a protocol that performs an instantaneous maximization of the…

Statistical Mechanics · Physics 2008-04-13 F. J. Cao , M. Feito

We report on timing observations of the recently discovered binary pulsar PSR J1952+2630 using the Arecibo Observatory. The mildly recycled 20.7-ms pulsar is in a 9.4-hr orbit with a massive, M_WD > 0.93 M_sun, white dwarf (WD) companion.…

Solar and Stellar Astrophysics · Physics 2015-06-17 P. Lazarus , T. M. Tauris , B. Knispel , P. C. C. Freire , J. S. Deneva , V. M. Kaspi , B. Allen , S. Bogdanov , S. Chatterjee , I. H. Stairs , W. W. Zhu

Rotation-powered millisecond radio pulsars have been spun up to their present spin period by a $10^8$ - $10^9$ yr long X-ray-bright phase of accretion of matter and angular momentum in a low-to-intermediate mass binary system. Recently, the…

High Energy Astrophysical Phenomena · Physics 2015-06-19 A. Papitto , D. F. Torres , N. Rea , T. Tauris

We study the timing and spectral properties of the X-ray pulsar 2S 1417--624 during the recent outburst in January 2021 based on the Neutron Star Interior Composition Explorer (NICER) observation. We also used some early data from the 2018…

High Energy Astrophysical Phenomena · Physics 2022-11-28 Manoj Mandal , Sabyasachi Pal

The measurement of the spin frequency in accreting millisecond X-ray pulsars (AMXPs) is strongly affected by the presence of an unmodeled component in the pulse arrival times called 'timing noise'. We show that it is possible to attribute…

High Energy Astrophysical Phenomena · Physics 2011-02-11 Alessandro Patruno , Rudy Wijnands , Michiel van der Klis

We performed a timing analysis of the 2003 outburst of the accreting X-ray millisecond pulsar XTE J1807-294 observed by RXTE. Using recently refined orbital parameters we report for the first time a precise estimate of the spin frequency…

Astrophysics · Physics 2009-11-13 A. Riggio , T. Di Salvo , L. Burderi , M. T. Menna , A. Papitto , R. Iaria , G. Lavagetto

We present an updated timing solution for the young, energetic pulsar PSR B1509-58 based on 21.3 years of radio timing data and 7.6 years of X-ray timing data. No glitches have occurred in this time span, in contrast to other well-studied…

We have studied the effects of accumulating cyclic electrical pulses of increasing amplitude on the non-volatile resistance state of interfaces made by sputtering a metal (Au, Pt) on top of the surface of a cuprate superconductor…

Materials Science · Physics 2015-05-22 Alejandro Schulman , Carlos Acha

We performed a timing analysis of the fastest accreting millisecond pulsar IGR J00291+5934 using RXTE data taken during the outburst of December 2004. We corrected the arrival times of all the events for the orbital (Doppler) effects and…

Pulsar glitches are the sudden increase in their spin frequency, most accompanied with a long timescale recovery process. A permanent shift would be remained in the first order derivative of spin frequency with time. Relevant data fitting…

High Energy Astrophysical Phenomena · Physics 2021-08-31 Chun Huang , Chenwei Lin , Jiachen Xie , Xiaoping Zheng

In era of NOvA operation, it is planned to slip-stack six on six Booster proton batches in the Recycler ring for a total intensity of 5 1013 protons/cycle. During the slip-stacking, the chromaticities are required to be jumped from (-2,-2)…

Accelerator Physics · Physics 2013-01-29 M. Xiao

A double kicker system which extracts the ultra-low emittance multi-bunch beam stably from ATF damping ring was developed. The performance of the system was studied comparing an orbit jitter with single kicker extraction in single bunch…

Accelerator Physics · Physics 2007-05-23 T. Imai , K. Nakai , H. Hayano , J. Urakawa , N. Terunuma

The high speeds seen in rapidly rotating pulsars after supernova explosions present a longstanding puzzle in astrophysics. Numerous theories have been suggested over the years to explain this sudden "kick" imparted to the neutron star, yet…

High Energy Astrophysical Phenomena · Physics 2024-12-12 Gaetano Lambiase , Tanmay Kumar Poddar

The changes in phase, time and frequency suffered by signals when retransmitted by a remote and inaccessible transponder and the propagation delays are major constraints to obtain accurate ranging measurements in various related…

Instrumentation and Methods for Astrophysics · Physics 2015-05-25 P. Kaufmann , P. L. Kaufmann , S. V. D. Pamboukian , R. Vilhena de Morais

We use the grid of models described in paper~I to analyse those millisecond pulsar binaries whose secondaries have been studied optically. In particular, we find cooling ages for these binary systems that range from $< 1 \rm Gyr$ to $\sim…

Astrophysics · Physics 2020-11-25 Brad M. S. Hansen , E. Sterl Phinney

We report the detection of 376.05 Hz (2.66 ms) coherent X-ray pulsations in NICER observations of a transient outburst of the low-mass X-ray binary IGR J17494-3030 in 2020 October/November. The system is an accreting millisecond X-ray…

Streamer discharges are often operated in a repetitively pulsed mode and are therefore influenced by species left over from the previous discharge, especially free electrons and ions. We have investigated these effects by applying two…

Plasma Physics · Physics 2014-03-24 S. Nijdam , E. Takahashi , A. H. Markosyan , U. Ebert

Coupler RF kick due to the asymmetric structure caused by the coupler, is more likely to lead to emittance growth in the SHINE injector with low beam energy. The calculation of coupler RF kick and resulting emittance dilution has been…

Accelerator Physics · Physics 2023-12-11 Junjie Guo , Duan Gu , Zenggong Jiang , Zhen Wang , Meng Zhang , Qiang Gu , Haixiao Deng