The NANOGrav 12.5 yr Data Set: Wideband Timing of 47 Millisecond Pulsars
文献类型：期刊论文
| 作者 | Alam,Md F.2; Arzoumanian,Zaven3; Baker,Paul T.4; Blumer,Harsha5,6; Bohler,Keith E.7; Brazier,Adam8; Brook,Paul R.5,6; Burke-Spolaor,Sarah5,6; Caballero,Keeisi7; Camuccio,Richard S.7 |
| 刊名 | The Astrophysical Journal Supplement Series
 |
| 出版日期 | 2020-12-21 |
| 卷号 | 252期号:1 |
| ISSN号 | 0067-0049 |
| 关键词 | Millisecond pulsars Pulsar timing method Rotation powered pulsars Binary pulsars Radio pulsars Pulsars Gravitational waves Astronomy data analysis Interstellar medium |
| DOI | 10.3847/1538-4365/abc6a1 |
| 英文摘要 | Abstract We present a new analysis of the profile data from the 47 millisecond pulsars comprising the 12.5 yr data set of the North American Nanohertz Observatory for Gravitational Waves, which is presented in a parallel paper (Alam et al., hereafter NG12.5). Our reprocessing is performed using “wideband” timing methods, which use frequency-dependent template profiles, simultaneous time-of-arrival (TOA) and dispersion measure (DM) measurements from broadband observations, and novel analysis techniques. In particular, the wideband DM measurements are used to constrain the DM portion of the timing model. We compare the ensemble timing results to those in NG12.5 by examining the timing residuals, timing models, and noise-model components. There is a remarkable level of agreement across all metrics considered. Our best-timed pulsars produce encouragingly similar results to those from NG12.5. In certain cases, such as high-DM pulsars with profile broadening or sources that are weak and scintillating, wideband timing techniques prove to be beneficial, leading to more precise timing model parameters by 10%–15%. The high-precision, multiband measurements of several pulsars indicate frequency-dependent DMs. Compared to the narrowband analysis in NG12.5, the TOA volume is reduced by a factor of 33, which may ultimately facilitate computational speed-ups for complex pulsar timing array analyses. This first wideband pulsar timing data set is a stepping stone, and its consistent results with NG12.5 assure us that such data sets are appropriate for gravitational wave analyses. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0067-0049-252-1-ABC6A1 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/61400]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Pennucci,Timothy T. |
| 作者单位 | 1.University of Washington Bothell, 18115 Campus Way NE, Bothell, WA 98011, USA 2.Department of Physics and Astronomy, Franklin & Marshall College, P.O. Box 3003, Lancaster, PA 17604, USA 3.X-Ray Astrophysics Laboratory, NASA Goddard Space Flight Center, Code 662, Greenbelt, MD 20771, USA 4.Department of Physics and Astronomy, Widener University, One University Place, Chester, PA 19013, USA 5.Department of Physics and Astronomy, West Virginia University, P.O. Box 6315, Morgantown, WV 26506, USA 6.Center for Gravitational Waves and Cosmology, West Virginia University, Chestnut Ridge Research Building, Morgantown, WV 26505, USA 7.Center for Advanced Radio Astronomy, University of Texas-Rio Grande Valley, Brownsville, TX 78520, USA 8.Cornell Center for Astrophysics and Planetary Science and Department of Astronomy, Cornell University, Ithaca, NY 14853, USA 9.Department of Physics, Montana State University, Bozeman, MT 59717, USA 10.Department of Physics, Lafayette College, Easton, PA 18042, USA |
| 推荐引用方式 GB/T 7714 | Alam,Md F.,Arzoumanian,Zaven,Baker,Paul T.,et al. The NANOGrav 12.5 yr Data Set: Wideband Timing of 47 Millisecond Pulsars[J]. The Astrophysical Journal Supplement Series,2020,252(1). |
| APA | Alam,Md F..,Arzoumanian,Zaven.,Baker,Paul T..,Blumer,Harsha.,Bohler,Keith E..,...&Zhu,Weiwei.(2020).The NANOGrav 12.5 yr Data Set: Wideband Timing of 47 Millisecond Pulsars.The Astrophysical Journal Supplement Series,252(1). |
| MLA | Alam,Md F.,et al."The NANOGrav 12.5 yr Data Set: Wideband Timing of 47 Millisecond Pulsars".The Astrophysical Journal Supplement Series 252.1(2020). |
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