在事件视界望远镜首批数据集中围绕 Sgr A* 的脉冲星搜寻
高能天体物理现象
2023-08-30 v1 天体物理仪器与方法
摘要
事件视界望远镜（EHT）于 2017 年以 228.1 GHz（=1.3 mm）的频率观测了银河系中心的超大质量黑洞人马座 A*（Sgr A*）。即便单颗绕 Sgr A* 运行的脉冲星也能实现的基物理学检验，激励了在 EHT 数据集中搜寻脉冲星。高观测频率意味着脉冲星——通常呈现陡峭发射谱——预期非常暗弱。然而，它也消除了脉冲散射，这一效应可能阻碍银河系中心的脉冲星探测。此外，磁星或次级逆康普顿发射在毫米波长可能比低频更强。我们呈现了使用 EHT 2017 观测中三个最灵敏台站的数据对靠近 Sgr A* 的脉冲星搜寻：阿塔卡马大型毫米/亚毫米波阵列、大型毫米波望远镜和 IRAM 30 米望远镜。我们应用了三种基于傅里叶域分析、快速折叠算法和针对脉冲星与爆发状瞬态发射的单脉冲搜寻的检测方法；利用观测的同时性来确认潜在候选体。未发现新脉冲星或显著爆发。作为史上首次在如此高射电频率进行的脉冲星搜寻，我们详述了分析方法并给出了搜寻灵敏度的详细估计。我们得出结论：EHT 2017 观测仅对可能存在靠近 Sgr A* 的脉冲星中的一小部分（2.2%）敏感，这激励在该区域对更暗弱脉冲星的进一步搜寻。
引用
@article{arxiv.2308.15381,
title = {A search for pulsars around Sgr A* in the first Event Horizon Telescope dataset},
author = {Pablo Torne and Kuo Liu and Ralph P. Eatough and Jompoj Wongphechauxsorn and James M. Cordes and Gregory Desvignes and Mariafelicia De Laurentis and Michael Kramer and Scott M. Ransom and Shami Chatterjee and Robert Wharton and Ramesh Karuppusamy and Lindy Blackburn and Michael Janssen and Chi-kwan Chan and Geoffrey B. Crew and Lynn D. Matthews and Ciriaco Goddi and Helge Rottmann and Jan Wagner and Salvador Sanchez and Ignacio Ruiz and Federico Abbate and Geoffrey C. Bower and Juan J. Salamanca and Arturo I. Gomez-Ruiz and Alfredo Herrera-Aguilar and Wu Jiang and Ru-Sen Lu and Ue-Li Pen and Alexander W. Raymond and Lijing Shao and Zhiqiang Shen and Gabriel Paubert and Miguel Sanchez-Portal and Carsten Kramer and Manuel Castillo and Santiago Navarro and David John and Karl-Friedrich Schuster and Michael D. Johnson and Kazi L. J. Rygl and Kazunori Akiyama and Antxon Alberdi and Walter Alef and Juan Carlos Algaba and Richard Anantua and Keiichi Asada and Rebecca Azulay and Uwe Bach and Anne-Kathrin Baczko and David Ball and Mislav Balokovic and John Barrett and Michi Bauboeck and Bradford A. Benson and Dan Bintley and Raymond Blundell and Katherine L. Bouman and Hope Boyce and Michael Bremer and Christiaan D. Brinkerink and Roger Brissenden and Silke Britzen and Avery E. Broderick and Dominique Broguiere and Thomas Bronzwaer and Sandra Bustamante and Do-Young Byun and John E. Carlstrom and Chiara Ceccobello and Andrew Chael and Dominic O. Chang and Koushik Chatterjee and Ming-Tang Chen and Yongjun Chen and Xiaopeng Cheng and Ilje Cho and Pierre Christian and Nicholas S. Conroy and John E. Conway and Thomas M. Crawford and Alejandro Cruz-Osorio and Yuzhu Cui and Rohan Dahale and Jordy Davelaar and Roger Deane and Jessica Dempsey and Jason Dexter and Vedant Dhruv and Sheperd S. Doeleman and Sean Dougal and Sergio A. Dzib and Razieh Emami and Heino Falcke and Joseph Farah and Vincent L. Fish and Ed Fomalont and H. Alyson Ford and Marianna Foschi and Raquel Fraga-Encinas and William T. Freeman and Per Friberg and Christian M. Fromm and Antonio Fuentes and Peter Galison and Charles F. Gammie and Roberto Garcia and Olivier Gentaz and Boris Georgiev and Roman Gold and Jose L. Gomez and Minfeng Gu and Mark Gurwell and Kazuhiro Hada and Daryl Haggard and Kari Haworth and Michael H. Hecht and Ronald Hesper and Dirk Heumann and Luis C. Ho and Paul Ho and Mareki Honma and Chih-Wei L. Huang and Lei Huang and David H. Hughes and Shiro Ikeda and C. M. Violette Impellizzeri and Makoto Inoue and Sara Issaoun and David J. James and Buell T. Jannuzi and Britton Jeter and Alejandra Jimenez-Rosales and Svetlana Jorstad and Abhishek V. Joshi and Taehyun Jung and Mansour Karami and Tomohisa Kawashima and Garrett K. Keating and Mark Kettenis and Dong-Jin Kim and Jae-Young Kim and Jongsoo Kim and Junhan Kim and Motoki Kino and Jun Yi Koay and Prashant Kocherlakota and Yutaro Kofuji and Shoko Koyama and Thomas P. Krichbaum and Cheng-Yu Kuo and Noemi La Bella and Tod R. Lauer and Daeyoung Lee and Sang-Sung Lee and Po Kin Leung and Aviad Levis and Zhiyuan Li and Rocco Lico and Greg Lindahl and Michael Lindqvist and Mikhail Lisakov and Jun Liu and Elisabetta Liuzzo and Wen-Ping Lo and Andrei P. Lobanov and Laurent Loinard and Colin J. Lonsdale and Nicholas R. MacDonald and Jirong Mao and Nicola Marchili and Sera Markoff and Daniel P. Marrone and Alan P. Marscher and Ivan Marti-Vidal and Satoki Matsushita and Lia Medeiros and Karl M. Menten and Daniel Michalik and Izumi Mizuno and Yosuke Mizuno and James M. Moran and Kotaro Moriyama and Monika Moscibrodzka and Cornelia Muller and Hendrik Muller and Alejandro Mus and Gibwa Musoke and Ioannis Myserlis and Andrew Nadolski and Hiroshi Nagai and Neil M. Nagar and Masanori Nakamura and Ramesh Narayan and Gopal Narayanan and Iniyan Natarajan and Antonios Nathanail and Joey Neilsen and Roberto Neri and Chunchong Ni and Aristeidis Noutsos and Michael A. Nowak and Junghwan Oh and Hiroki Okino and Hector Olivares and Gisela N. Ortiz-Leon and Tomoaki Oyama and Feryal Ozel and Daniel C. M. Palumbo and Georgios Filippos Paraschos and Jongho Park and Harriet Parsons and Nimesh Patel and Dominic W. Pesce and Vincent Pietu and Richard Plambeck and Aleksandar PopStefanija and Oliver Porth and Felix M. Potzl and Ben Prather and Jorge A. Preciado-Lopez and Dimitrios Psaltis and Hung-Yi Pu and Venkatessh Ramakrishnan and Ramprasad Rao and Mark G. Rawlings and Luciano Rezzolla and Angelo Ricarte and Bart Ripperda and Freek Roelofs and Alan Rogers and Eduardo Ros and Cristina Romero-Cañizales and Arash Roshanineshat and Alan L. Roy and Chet Ruszczyk and David Sanchez-Arguelles and Mahito Sasada and Kaushik Satapathy and Tuomas Savolainen and F. Peter Schloerb and Jonathan Schonfeld and Zhiqiang Shen and Des Small and Bong Won Sohn and Jason SooHoo and Kamal Souccar and He Sun and Alexandra J. Tetarenko and Paul Tiede and Remo P. J. Tilanus and Michael Titus and Teresa Toscano and Efthalia Traianou and Tyler Trent and Sascha Trippe and Matthew Turk and Ilse van Bemmel and Huib Jan van Langevelde and Daniel R. van Rossum and Jesse Vos and Derek Ward-Thompson and John Wardle and Jonathan Weintroub and Norbert Wex and Maciek Wielgus and Kaj Wiik and Gunther Witzel and Michael F. Wondrak and George N. Wong and Qingwen Wu and Nitika Yadlapalli and Paul Yamaguchi and Aristomenis Yfantis and Doosoo Yoon and Andre Young and Ken Young and Ziri Younsi and Wei Yu and Feng Yuan and Ye-Fei Yuan and J. Anton Zensus and Shuo Zhang and Guang-Yao Zhao and Shan-Shan Zhao},
journal= {arXiv preprint arXiv:2308.15381},
year = {2023}
}
备注
33 pages, 7 figures, 6 Tables. Accepted for publication in ApJ