Zobrazeno 1 - 10
of 1 071
pro vyhledávání: '"Weltevrede, A"'
In multi-task reinforcement learning, agents train on a fixed set of tasks and have to generalise to new ones. Recent work has shown that increased exploration improves this generalisation, but it remains unclear why exactly that is. In this paper, w
Externí odkaz:
http://arxiv.org/abs/2410.03565
We use data from the MeerTime project on the MeerKAT telescope to ask whether the radio emission properties of millisecond pulsars (MSPs) and slowly rotating, younger pulsars (SPs) are similar or different. We show that the flux density spectra of bo
Externí odkaz:
http://arxiv.org/abs/2407.06836
Autor:
Kumari, Sangita, Bhattacharyya, Bhaswati, Sharan, Rahul, Johnston, Simon, Weltevrede, Patrick, Stappers, Benjamin, Kansabanik, Devojyoti, Roy, Jayanta, Ghosh, Ankita
This study presents an orbital phase-dependent analysis of three black widow spider millisecond pulsars (BW MSPs), aiming to investigate the magnetic field within the eclipse environment. The ultra-wide-bandwidth low-frequency receiver (UWL) of the P
Externí odkaz:
http://arxiv.org/abs/2407.01024
Autor:
Liu, Yang, Keith, Michael J., Antonopoulou, Danai, Weltevrede, Patrick, Shaw, Benjamin, Stappers, Benjamin W., Lyne, Andrew G., Mickaliger, Mitchell B., Basu, Avishek
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 532, Issue 1, pp.859-882 July 2024
For a selection of 35 pulsars with large spin-up glitches ($\Delta{\nu}/\nu\geq10^{-6}$), which are monitored by the Jodrell Bank Observatory, we analyse 157 glitches and their recoveries. All parameters are measured consistently and we choose the be
Externí odkaz:
http://arxiv.org/abs/2406.09219
One of the remaining challenges in reinforcement learning is to develop agents that can generalise to novel scenarios they might encounter once deployed. This challenge is often framed in a multi-task setting where agents train on a fixed set of task
Externí odkaz:
http://arxiv.org/abs/2406.08069
Autor:
Keith, M. J., Johnston, S., Karastergiou, A., Weltevrede, P., Lower, M. E., Basu, A., Posselt, B., Oswald, L. S., Parthasarathy, A., Cameron, A. D., Serylak, M., Buchner, S.
We report here on the timing of 597 pulsars over the last four years with the MeerKAT telescope. We provide Times-of-Arrival, pulsar ephemeris files and per-epoch measurements of the flux density, dispersion measure (DM) and rotation measure (RM) for
Externí odkaz:
http://arxiv.org/abs/2404.02051
Autor:
Basu, A., Weltevrede, P., Keith, M. J., Johnston, S., Karastergiou, A., Oswald, L. S., Posselt, B., Song, X., Cameron, A. D.
A number of pulsars are known to have profile evolution on timescales of months, often correlated with spin-down rate changes. Here, we present the first result from 3 years of monitoring observations from MeerKAT as part of the Thousand Pulsar Array
Externí odkaz:
http://arxiv.org/abs/2402.09065
Autor:
Fisher, Rebecca, Butterworth, Elliot, Rajwade, Kaustubh, Stappers, Ben, Desvignes, Gregory, Karuppusamy, Ramesh, Kramer, Michael, Liu, Kuo, Lyne, Andrew, Mickaliger, Mitchell, Shaw, Benjamin, Weltevrede, Patrick
The shape and polarisation properties of the radio pulse profiles of radio-loud magnetars provide a unique opportunity to investigate their magnetospheric properties. Gaussian Process Regression analysis was used to investigate the variation in the t
Externí odkaz:
http://arxiv.org/abs/2401.12909
Autor:
Vahdat, Armin, Posselt, Bettina, Pavlov, George G., Weltevrede, Patrick, Santangelo, Andrea, Johnston, Simon
We present a detailed study of the X-ray emission from PSR B1055-52 using XMM-Newton observations from 2019 and 2000. The phase-integrated X-ray emission from this pulsar is poorly described by existing neutron star atmosphere models. Instead, we con
Externí odkaz:
http://arxiv.org/abs/2401.12373
Autor:
Lower, Marcus E., Johnston, Simon, Lyutikov, Maxim, Melrose, Donald B., Shannon, Ryan M., Weltevrede, Patrick, Caleb, Manisha, Camilo, Fernando, Cameron, Andrew D., Dai, Shi, Hobbs, George, Li, Di, Rajwade, Kaustubh M., Reynolds, John E., Sarkissian, John M., Stappers, Benjamin W.
Radio emission from magnetars provides a unique probe of the relativistic, magnetized plasma within the near-field environment of these ultra-magnetic neutron stars. The transmitted waves can undergo birefringent and dispersive propagation effects th
Externí odkaz:
http://arxiv.org/abs/2311.04195