A Search for Pulsars around Sgr A* in the First Event Horizon Telescope Data Set | |
Torne, Pablo152,153; Liu, Kuo152; Eatough, Ralph P.151,152; Wongphechauxsorn, Jompoj152; Cordes, James M.150; Desvignes, Gregory149,152; Laurentis, Mariafelicia De145,146,148; Kramer, Michael144,152; Ransom, Scott M.143; Chatterjee, Shami150 | |
刊名 | ASTROPHYSICAL JOURNAL |
2023-12-01 | |
卷号 | 959期号:1 |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/acf4f2 |
产权排序 | 第111完成单位 |
文献子类 | Article |
英文摘要 | In 2017 the Event Horizon Telescope (EHT) observed the supermassive black hole at the center of the Milky Way, Sagittarius A* (Sgr A*), at a frequency of 228.1 GHz (lambda = 1.3 mm). The fundamental physics tests that even a single pulsar orbiting Sgr A* would enable motivate searching for pulsars in EHT data sets. The high observing frequency means that pulsars-which typically exhibit steep emission spectra-are expected to be very faint. However, it also negates pulse scattering, an effect that could hinder pulsar detections in the Galactic center. Additionally, magnetars or a secondary inverse Compton emission could be stronger at millimeter wavelengths than at lower frequencies. We present a search for pulsars close to Sgr A* using the data from the three most sensitive stations in the EHT 2017 campaign: the Atacama Large Millimeter/submillimeter Array, the Large Millimeter Telescope, and the IRAM 30 m Telescope. We apply three detection methods based on Fourier-domain analysis, the fast folding algorithm, and single-pulse searches targeting both pulsars and burst-like transient emission. We use the simultaneity of the observations to confirm potential candidates. No new pulsars or significant bursts were found. Being the first pulsar search ever carried out at such high radio frequencies, we detail our analysis methods and give a detailed estimation of the sensitivity of the search. We conclude that the EHT 2017 observations are only sensitive to a small fraction (less than or similar to 2.2%) of the pulsars that may exist close to Sgr A*, motivating further searches for fainter pulsars in the region. |
学科主题 | 天文学 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
资助项目 | N/A |
WOS关键词 | GALACTIC-CENTER MAGNETAR ; SUPERMASSIVE BLACK-HOLE ; STAR-FORMATION HISTORY ; GENERAL-RELATIVITY ; RADIO OBSERVATIONS ; STELLAR DYNAMICS ; GRAVITY TESTS ; RESULTS. VI. ; DISCOVERY ; MILKY |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP Publishing Ltd |
WOS记录号 | WOS:001113867600001 |
资助机构 | N/A |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/26447] |
专题 | 云南天文台_中国科学院天体结构与演化重点实验室 |
作者单位 | 1.Niigata University, 8050 Ikarashi-nino-cho, Nishi-ku, Niigata 950-2181, Japan; 2.Department of Astronomy, University of Massachusetts, Amherst, MA 01003, USA; 3.Korea Astronomy and Space Science Institute, Daedeok-daero 776, Yuseong-gu, Daejeon 34055, Republic of Korea; 4.Bard College, 30 Campus Road, Annandale-on-Hudson, NY 12504, USA 5.Astronomy Department, University of Science and Technology of China, Hefei 230026, People's Republic of China; 6.School of Astronomy and Space Sciences, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, People's Republic of China; 7.Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT, UK; 8.School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People's Republic of China; 9.Princeton Gravity Initiative, Princeton University, Princeton, NJ 08544, USA; 10.Radboud Excellence Fellow of Radboud University, Nijmegen, The Netherlands; |
推荐引用方式 GB/T 7714 | Torne, Pablo,Liu, Kuo,Eatough, Ralph P.,et al. A Search for Pulsars around Sgr A* in the First Event Horizon Telescope Data Set[J]. ASTROPHYSICAL JOURNAL,2023,959(1). |
APA | Torne, Pablo.,Liu, Kuo.,Eatough, Ralph P..,Wongphechauxsorn, Jompoj.,Cordes, James M..,...&Zhao, Shan-Shan.(2023).A Search for Pulsars around Sgr A* in the First Event Horizon Telescope Data Set.ASTROPHYSICAL JOURNAL,959(1). |
MLA | Torne, Pablo,et al."A Search for Pulsars around Sgr A* in the First Event Horizon Telescope Data Set".ASTROPHYSICAL JOURNAL 959.1(2023). |
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