Zobrazeno 1 - 10
of 184
pro vyhledávání: '"Hobbs, George"'
Autor:
Rogers, Axl F., van Straten, Willem, Gulyaev, Sergei, Parthasarathy, Aditya, Hobbs, George, Chen, Zu-Cheng, Feng, Yi, Goncharov, Boris, Kapur, Agastya, Liu, Xiaojin, Reardon, Daniel, Russell, Christopher J., Zic, Andrew
This paper demonstrates the impact of state-of-the-art instrumental calibration techniques on the precision of arrival times obtained from 9.6 years of observations of millisecond pulsars using the Murriyang 64-m CSIRO Parkes Radio Telescope. Our stu
Externí odkaz:
http://arxiv.org/abs/2407.20015
Autor:
Reardon, Daniel J., Bailes, Matthew, Shannon, Ryan M., Flynn, Chris, Askew, Jacob, Bhat, N. D. Ramesh, Chen, Zu-Cheng, Curyło, Małgorzata, Feng, Yi, Hobbs, George B., Kapur, Agastya, Kerr, Matthew, Liu, Xiaojin, Manchester, Richard N., Mandow, Rami, Mishra, Saurav, Russell, Christopher J., Shamohammadi, Mohsen, Zhang, Lei, Zic, Andrew
The observation of neutron stars enables the otherwise impossible study of fundamental physical processes. The timing of binary radio pulsars is particularly powerful, as it enables precise characterization of their (three-dimensional) positions and
Externí odkaz:
http://arxiv.org/abs/2407.07132
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
Autor:
Reardon, Daniel J., Zic, Andrew, Shannon, Ryan M., Di Marco, Valentina, Hobbs, George B., Kapur, Agastya, Lower, Marcus E., Mandow, Rami, Middleton, Hannah, Miles, Matthew T., Rogers, Axl F., Askew, Jacob, Bailes, Matthew, Bhat, N. D. Ramesh, Cameron, Andrew, Kerr, Matthew, Kulkarni, Atharva, Manchester, Richard N., Nathan, Rowina S., Russell, Christopher J., Osłowski, Stefan, Zhu, Xing-Jiang
The noise in millisecond pulsar (MSP) timing data can include contributions from observing instruments, the interstellar medium, the solar wind, solar system ephemeris errors, and the pulsars themselves. The noise environment must be accurately chara
Externí odkaz:
http://arxiv.org/abs/2306.16229
Autor:
Zic, Andrew, Reardon, Daniel J., Kapur, Agastya, Hobbs, George, Mandow, Rami, Curyło, Małgorzata, Shannon, Ryan M., Askew, Jacob, Bailes, Matthew, Bhat, N. D. Ramesh, Cameron, Andrew, Chen, Zu-Cheng, Dai, Shi, Di Marco, Valentina, Feng, Yi, Kerr, Matthew, Kulkarni, Atharva, Lower, Marcus E., Luo, Rui, Manchester, Richard N., Miles, Matthew T., Nathan, Rowina S., Osłowski, Stefan, Rogers, Axl F., Russell, Christopher J., Sarkissian, John M., Shamohammadi, Mohsen, Spiewak, Renée, Thyagarajan, Nithyanandan, Toomey, Lawrence, Wang, Shuangqiang, Zhang, Lei, Zhang, Songbo, Zhu, Xing-Jiang
We present the third data release from the Parkes Pulsar Timing Array (PPTA) project. The release contains observations of 32 pulsars obtained using the 64-m Parkes "Murriyang" radio telescope. The data span is up to 18 years with a typical cadence o
Externí odkaz:
http://arxiv.org/abs/2306.16230
Autor:
Reardon, Daniel J., Zic, Andrew, Shannon, Ryan M., Hobbs, George B., Bailes, Matthew, Di Marco, Valentina, Kapur, Agastya, Rogers, Axl F., Thrane, Eric, Askew, Jacob, Bhat, N. D. Ramesh, Cameron, Andrew, Curyło, Małgorzata, Coles, William A., Dai, Shi, Goncharov, Boris, Kerr, Matthew, Kulkarni, Atharva, Levin, Yuri, Lower, Marcus E., Manchester, Richard N., Mandow, Rami, Miles, Matthew T., Nathan, Rowina S., Osłowski, Stefan, Russell, Christopher J., Spiewak, Renée, Zhang, Songbo, Zhu, Xing-Jiang
Pulsar timing arrays aim to detect nanohertz-frequency gravitational waves (GWs). A background of GWs modulates pulsar arrival times and manifests as a stochastic process, common to all pulsars, with a signature spatial correlation. Here we describe
Externí odkaz:
http://arxiv.org/abs/2306.16215
Autor:
Curyło, Małgorzata, Pennucci, Timothy T., Bailes, Matthew, Bhat, N. D. Ramesh, Cameron, Andrew D., Dai, Shi, Hobbs, George, Kapur, Agastya, Manchester, Richard N., Mandow, Rami, Miles, Matthew T., Russell, Christopher J., Reardon, Daniel J., Shannon, Ryan M., Spiewak, Renée, Zic, Andrew, Zhu, Xing-Jiang
In 2018 an ultra-wide-bandwidth low-frequency (UWL) receiver was installed on the 64-m Parkes Radio Telescope enabling observations with an instantaneous frequency coverage from 704 to 4032 MHz. Here, we present the analysis of a three-year data set
Externí odkaz:
http://arxiv.org/abs/2211.12924
Autor:
Wu, Yu-Mei, Chen, Zu-Cheng, Huang, Qing-Guo, Zhu, Xingjiang, Bhat, N. D. Ramesh, Feng, Yi, Hobbs, George, Manchester, Richard N., Russell, Christopher J., Shannon, R. M.
Composed of ultralight bosons, fuzzy dark matter provides an intriguing solution to challenges that the standard cold dark matter model encounters on sub-galactic scales. The ultralight dark matter with mass $m\sim10^{-23} \rm{eV}$ will induce a peri
Externí odkaz:
http://arxiv.org/abs/2210.03880
Autor:
Yong, Suk Yee, Hobbs, George, Huynh, Minh T., Rolland, Vivien, Petersson, Lars, Norris, Ray P., Dai, Shi, Luo, Rui, Zic, Andrew
New classes of astronomical objects are often discovered serendipitously. The enormous data volumes produced by recent high-time resolution, radio-telescope surveys imply that efficient algorithms are required for a discovery. Such algorithms are usu
Externí odkaz:
http://arxiv.org/abs/2209.03080
Autor:
Zic, Andrew, Hobbs, George, Shannon, R. M., Reardon, Daniel, Goncharov, Boris, Bhat, N. D. Ramesh, Cameron, Andrew, Dai, Shi, Dawson, J. R., Kerr, Matthew, Manchester, R. N., Mandow, Rami, Marshman, Tommy, Russell, Christopher J., Thyagarajan, Nithyanandan, Zhu, X. -J.
Pulsar timing array collaborations have recently reported evidence for a noise process with a common spectrum among the millisecond pulsars in the arrays. The spectral properties of this common-noise process are consistent with expectations for an is
Externí odkaz:
http://arxiv.org/abs/2207.12237