Zobrazeno 1 - 10
of 403
pro vyhledávání: '"Oswald L"'
Autor:
Lower, M. E., Kramer, M., Johnston, S., Breton, R. P., Wex, N., Bailes, M., Buchner, S., Camilo, F., Oswald, L. S., Reardon, D. J., Shannon, R. M., Serylak, M., Krishnan, V. Venkatraman
PSR J0737$-$3039A/B is unique among double neutron star systems. Its near-perfect edge-on orbit causes the fast spinning pulsar A to be eclipsed by the magnetic field of the slow spinning pulsar B. Using high-sensitivity MeerKAT radio observations co
Externí odkaz:
http://arxiv.org/abs/2410.12510
We use data from the MeerTime project on the MeerKAT telescope to ask whether the radio emission properties of millisecond pulsars (MSPs) and slowly rotating, younger pulsars (SPs) are similar or different. We show that the flux density spectra of bo
Externí odkaz:
http://arxiv.org/abs/2407.06836
Autor:
Keith, M. J., Johnston, S., Karastergiou, A., Weltevrede, P., Lower, M. E., Basu, A., Posselt, B., Oswald, L. S., Parthasarathy, A., Cameron, A. D., Serylak, M., Buchner, S.
We report here on the timing of 597 pulsars over the last four years with the MeerKAT telescope. We provide Times-of-Arrival, pulsar ephemeris files and per-epoch measurements of the flux density, dispersion measure (DM) and rotation measure (RM) for
Externí odkaz:
http://arxiv.org/abs/2404.02051
Autor:
Basu, A., Weltevrede, P., Keith, M. J., Johnston, S., Karastergiou, A., Oswald, L. S., Posselt, B., Song, X., Cameron, A. D.
A number of pulsars are known to have profile evolution on timescales of months, often correlated with spin-down rate changes. Here, we present the first result from 3 years of monitoring observations from MeerKAT as part of the Thousand Pulsar Array
Externí odkaz:
http://arxiv.org/abs/2402.09065
Autor:
Lower, M. E., Johnston, S., Karastergiou, A., Brook, P. R., Bailes, M., Buchner, S., Deller, A. T., Dunn, L., Flynn, C., Kerr, M., Manchester, R. N., Mandlik, A., Oswald, L. S., Parthasarathy, A., Shannon, R. M., Sobey, C., Weltevrede, P.
We present a comprehensive study of the rotational and emission properties of PSR J0738$-$4042 using a combination of observations taken by the Deep Space Network, Hartebeesthoek, Parkes (Murriyang) and Molonglo observatories between 1972 and 2023. O
Externí odkaz:
http://arxiv.org/abs/2307.11953
Autor:
Oswald, L. S., Johnston, S., Karastergiou, A., Dai, S., Kerr, M., Lower, M. E., Manchester, R. N., Shannon, R. M., Sobey, C., Weltevrede, P.
The radio polarization properties of the pulsar population are only superficially captured by the conventional picture of pulsar radio emission. We study the broadband polarization of 271 young radio pulsars, focusing particularly on circular polariz
Externí odkaz:
http://arxiv.org/abs/2301.05628
Autor:
Song, X., Weltevrede, P., Szary, A., Wright, G., Keith, M. J., Basu, A., Johnston, S., Karastergiou, A., Main, R. A., Oswald, L. S., Parthasarathy, A., Posselt, B., Bailes, M., Buchner, S., Hugo, B., Serylak, M.
We report on the subpulse modulation properties of 1198 pulsars using the Thousand-Pulsar-Array programme on MeerKAT. About 35% of the analysed pulsars exhibit drifting subpulses which are more pronounced towards the deathline, consistent with previo
Externí odkaz:
http://arxiv.org/abs/2301.04067
Autor:
Posselt, B., Karastergiou, A., Johnston, S., Parthasarathy, A., Oswald, L. S., Main, R. A., Basu, A., Keith, M. J., Song, X., Weltevrede, P., Tiburzi, C., Bailes, M., Buchner, S., Geyer, M., Kramer, M., Spiewak, R., Krishnan, V. Venkatraman
We present the largest single survey to date of average profiles of radio pulsars, observed and processed using the same telescope and data reduction software. Specifically, we present measurements for 1170 pulsars, observed by the Thousand Pulsar Ar
Externí odkaz:
http://arxiv.org/abs/2211.11849
Autor:
Main, R. A., Parthasarathy, A., Johnston, S., Karastergiou, A., Basu, A., Cameron, A. D., Keith, M. J., Oswald, L. S., Posselt, B., Reardon, D. J., Song, X., Weltevrede, P.
We present the detection of 107 pulsars with interstellar scintillation arcs at 856--1712\,MHz, observed with the MeerKAT Thousand Pulsar Array Programme. Scintillation arcs appear to be ubiquitous in clean, high S/N observations, their detection mai
Externí odkaz:
http://arxiv.org/abs/2211.08471
Autor:
Gautam, T., Ridolfi, A., Freire, P. C. C., Wharton, R. S., Gupta, Y., Ransom, S. M., Oswald, L. S., Kramer, M., DeCesar, M. E.
Publikováno v:
A&A 664, A54 (2022)
Globular clusters contain a unique pulsar population, with many exotic systems that can form only in their dense stellar environments. The leap in sensitivity of the upgraded Giant Metrewave Radio Telescope (uGMRT) in India, especially at low radio f
Externí odkaz:
http://arxiv.org/abs/2205.15274