Wide-band profile domain pulsar timing analysis
文献类型：期刊论文
| 作者 | Lentati, L.1; Kerr, M.2; Dai, S.2; Hobson, M. P.1; Shannon, R. M.2,3; Hobbs, G.2; Bailes, M.4; Bhat, N. D. Ramesh3; Burke-Spolaor, S.5; Coles, W.6 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2017-04-01 |
| 卷号 | 466期号:3页码:3706-3727 |
| 通讯作者邮箱 | ltl21@cam.ac.uk |
| 关键词 | methods: data analysis pulsars: general pulsars: individual |
| ISSN号 | 0035-8711 |
| 通讯作者 | Lentati, L. |
| 英文摘要 | We extend profile domain pulsar timing to incorporate wide-band effects such as frequencydependent profile evolution and broad-band shape variation in the pulse profile. We also incorporate models for temporal variations in both pulse width and in the separation in phase of the main pulse and interpulse. We perform the analysis with both nested sampling and Hamiltonian Monte Carlo methods. In the latter case, we introduce a new parametrization of the posterior that is extremely efficient in the low signal-to-noise regime and can be readily applied to a wide range of scientific problems. We apply this methodology to a series of simulations, and to between seven and nine years of observations for PSRs J1713+0747,J1744-1134 and J1909-3744 with frequency coverage that spans 700-3600 Mhz. We use a smooth model for profile evolution across the full frequency range, and compare smooth and piecewise models for the temporal variations in dispersion measure (DM). We find that the profile domain framework consistently results in improved timing precision compared to the standard analysis paradigm by as much as 40 per cent for timing parameters. Incorporating smoothness in the DM variations into the model further improves timing precision by as much as 30 per cent. For PSR J1713+0747, we also detect pulse shape variation uncorrelated between epochs, which we attribute to variation intrinsic to the pulsar at a level consistent with previously published analyses. Not accounting for this shape variation biases the measured arrival times at the level of similar to 30 ns, the same order of magnitude as the expected shift due to gravitational waves in the pulsar timing band. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | 37 MILLISECOND PULSARS ; GRAVITATIONAL-WAVES ; PRECISION ; DISPERSION ; LIMITS ; SCINTILLATION ; EFFICIENT ; EMISSION ; ARRIVAL ; PHYSICS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000398418600088 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/1465]  |
| 专题 | 脉冲星研究团组 新疆天文台_射电天文研究室 |
| 作者单位 | 1.Cavendish Lab, Astrophys Grp, JJ Thomson Ave, Cambridge CB3 0HE, England 2.CSIRO Astron & Space Sci, Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia 3.Curtin Univ, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia 4.Swinburne Univ Technol, Ctr Astrophys & Supercomp, POB 218, Hawthorn, Vic 3122, Australia 5.Natl Radio Astron Observ, Array Operat Ctr, POB O, Soccoro, NM 87801 USA 6.Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA 7.CSIRO Informat Management & Technol, POB 225, Dickson, ACT 2602, Australia 8.Monash Univ, Sch Phys & Astron, Monash Ctr Astrophys, Clayton, Vic 3800, Australia 9.Univ Bielefeld, Fak Phys, Postfach 100131, D-33501 Bielefeld, Germany 10.Max Planck Inst Radio Astron, Hugel 69, D-53121 Bonn, Germany |
| 推荐引用方式 GB/T 7714 | Lentati, L.,Kerr, M.,Dai, S.,et al. Wide-band profile domain pulsar timing analysis[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,466(3):3706-3727. |
| APA | Lentati, L..,Kerr, M..,Dai, S..,Hobson, M. P..,Shannon, R. M..,...&Zhu, X..(2017).Wide-band profile domain pulsar timing analysis.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,466(3),3706-3727. |
| MLA | Lentati, L.,et al."Wide-band profile domain pulsar timing analysis".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 466.3(2017):3706-3727. |
入库方式： OAI收割
来源：新疆天文台
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