The Large Dispersion and Scattering of FRB 20190520B Are Dominated by the Host Galaxy
文献类型：期刊论文
| 作者 | Koch Ocker, Stella10,11; Cordes, James M.10,11; Chatterjee, Shami10,11; Niu, Chen-Hui9; Li, Di8,9; McKee, James W.7; Law, Casey J.5,6; Tsai, Chao-Wei9; Anna-Thomas, Reshma3,4; Yao, Ju-Mei2,9
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2022-06-01 |
| 卷号 | 931期号:2页码:11 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ac6504 |
| 通讯作者 | Koch Ocker, Stella(sko36@cornell.edu) |
| 英文摘要 | The repeating fast radio burst FRB 20190520B is localized to a galaxy at z = 0.241, much closer than expected given its dispersion measure DM = 1205 +/- 4 pc cm(-3). Here we assess implications of the large DM and scattering observed from FRB 20190520B for the host galaxy's plasma properties. A sample of 75 bursts detected with the Five-hundred-meter Aperture Spherical radio Telescope shows scattering on two scales: a mean temporal delay tau (1.41 GHz) = 10.9 +/- 1.5 ms, which is attributed to the host galaxy, and a mean scintillation bandwidth Delta nu(d) (1.41 GHz) = 0.21 +/- 0.01 MHz, which is attributed to the Milky Way. Balmer line measurements for the host imply an H alpha emission measure (galaxy frame) EMs = 620 pc cm(-6) x (T/10(4) K)(0.9), implying DMH alpha of order the value inferred from the FRB DM budget, DMh = 1121(-138)(+89) pc cm(-3) for plasma temperatures greater than the typical value 10(4) K. Combining tau and DMh yields a nominal constraint on the scattering amplification from the host galaxy (F) over tildeG = 1.51(-0.3)(+0.8) (pc(2) km)(-1/3), where (F) over tilde describes turbulent density fluctuations and G represents the geometric leverage to scattering that depends on the location of the scattering material. For a two-screen scattering geometry where tau arises from the host galaxy and Delta nu(d) from the Milky Way, the implied distance between the FRB source and dominant scattering material is less than or similar to 100 pc. The host galaxy scattering and DM contributions support a novel technique for estimating FRB redshifts using the tau-DM relation, and are consistent with previous findings that scattering of localized FRBs is largely dominated by plasma within host galaxies and the Milky Way. |
| WOS关键词 | FAST RADIO-BURST ; ENVIRONMENT ; ASTROPY |
| 资助项目 | National Science Foundation[AAG 1815242] ; National Science Foundation[2022546] ; NSF[PHY-2020265] ; NSF[AAG-1714897] ; FAST Fellowship ; National Natural Science Foundation of China (NSFC)[11988101] ; National Natural Science Foundation of China (NSFC)[11725313] ; NSFC[11973051] ; Natural Sciences and Engineering Research Council of Canada (NSERC)[CITA 490888-16] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP Publishing Ltd |
| WOS记录号 | WOS:000802953500001 |
| 资助机构 | National Science Foundation ; NSF ; FAST Fellowship ; National Natural Science Foundation of China (NSFC) ; NSFC ; Natural Sciences and Engineering Research Council of Canada (NSERC) |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4770]  |
| 专题 | 脉冲星研究团组 科研仪器设备产出_我台利用FAST观测数据文章 |
| 通讯作者 | Koch Ocker, Stella |
| 作者单位 | 1.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 2.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 3.West Virginia Univ, Ctr Gravitat Waves & Cosmol, Morgantown, WV 26506 USA 4.West Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA 5.CALTECH, Owens Valley Radio Observ, 100 Leighton Lane, Big Pine, CA 93513 USA 6.CALTECH, Cahill Ctr Astron & Astrophys, MC 249-17, Pasadena, CA 91125 USA 7.Univ Toronto, Canadian Inst Theoret Astrophys, 60 St George St, Toronto, ON M5S 3H8, Canada 8.Univ KwaZulu Natal, NAOC UKZN Computat Astrophys Ctr, ZA-4000 Durban, South Africa 9.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China 10.Cornell Univ, Cornell Ctr Astrophys & Planetary Sci, Ithaca, NY 14853 USA |
| 推荐引用方式 GB/T 7714 | Koch Ocker, Stella,Cordes, James M.,Chatterjee, Shami,et al. The Large Dispersion and Scattering of FRB 20190520B Are Dominated by the Host Galaxy[J]. ASTROPHYSICAL JOURNAL,2022,931(2):11. |
| APA | Koch Ocker, Stella.,Cordes, James M..,Chatterjee, Shami.,Niu, Chen-Hui.,Li, Di.,...&Cruces, Marilyn.(2022).The Large Dispersion and Scattering of FRB 20190520B Are Dominated by the Host Galaxy.ASTROPHYSICAL JOURNAL,931(2),11. |
| MLA | Koch Ocker, Stella,et al."The Large Dispersion and Scattering of FRB 20190520B Are Dominated by the Host Galaxy".ASTROPHYSICAL JOURNAL 931.2(2022):11. |
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