皮埃尔·奥格天文台测量的赤经方向宇宙线各向异性
高能天体物理现象
2021-01-11 v1
摘要
我们展示了利用皮埃尔·奥格天文台地面探测器阵列在超过14年间收集的数据所得到的大尺度宇宙线赤经各向异性的测量结果。我们通过赤经方向的傅里叶分析确定赤道偶极分量 ，该分析为每个事件赋予权重以考虑主要的探测器诱发系统效应。对于阵列触发效率较低的能量，采用“东西”法。除了使用探测器间距1500 m的阵列数据外，我们还纳入了间距750 m的较小但更密集的探测器子阵列数据，从而将分析扩展至低至 EeV。所获得的最显著赤道偶极振幅为高于 8~EeV 的累积能 bin 中的 %，其在 6 水平上与各向同性不一致。在低于 8 EeV 的能 bin 中，我们得到 在 1% 至 3% 量级的 99% CL 上限。在低于 1 EeV 的能量下，尽管振幅不显著，多数能 bin 中确定的相位与银心赤经 相距不远，表明这些能量下的各向异性主要源于银河系。相反，高于 4 EeV 能 bin 中重建的偶极相位指向几乎与银心相反的赤经，表明其为河外宇宙线起源。
引用
@article{arxiv.2002.06172,
title = {Cosmic-ray anisotropies in right ascension measured by the Pierre Auger Observatory},
author = {The Pierre Auger Collaboration and A. Aab and P. Abreu and M. Aglietta and I. F. M. Albuquerque and J. M. Albury and I. Allekotte and A. Almela and J. Alvarez Castillo and J. Alvarez-Muñiz and G. A. Anastasi and L. Anchordoqui and B. Andrada and S. Andringa and C. Aramo and P. R. Araújo Ferreira and H. Asorey and P. Assis and G. Avila and A. M. Badescu and A. Bakalova and A. Balaceanu and F. Barbato and R. J. Barreira Luz and K. H. Becker and J. A. Bellido and C. Berat and M. E. Bertaina and X. Bertou and P. L. Biermann and T. Bister and J. Biteau and A. Blanco and J. Blazek and C. Bleve and M. Boháčová and D. Boncioli and C. Bonifazi and L. Bonneau Arbeletche and N. Borodai and A. M. Botti and J. Brack and T. Bretz and F. L. Briechle and P. Buchholz and A. Bueno and S. Buitink and M. Buscemi and K. S. Caballero-Mora and L. Caccianiga and L. Calcagni and A. Cancio and F. Canfora and I. Caracas and J. M. Carceller and R. Caruso and A. Castellina and F. Catalani and G. Cataldi and L. Cazon and M. Cerda and J. A. Chinellato and K. Choi and J. Chudoba and L. Chytka and R. W. Clay and A. C. Cobos Cerutti and R. Colalillo and A. Coleman and M. R. Coluccia and R. Conceição and A. Condorelli and G. Consolati and F. Contreras and F. Convenga and C. E. Covault and S. Dasso and K. Daumiller and B. R. Dawson and J. A. Day and R. M. de Almeida and J. de Jesús and S. J. de Jong and G. De Mauro and J. R. T. de Mello Neto and I. De Mitri and J. de Oliveira and D. de Oliveira Franco and V. de Souza and J. Debatin and M. del Río and O. Deligny and N. Dhital and A. Di Matteo and M. L. Díaz Castro and C. Dobrigkeit and J. C. D'Olivo and Q. Dorosti and R. C. dos Anjos and M. T. Dova and J. Ebr and R. Engel and I. Epicoco and M. Erdmann and C. O. Escobar and A. Etchegoyen and H. Falcke and J. Farmer and G. Farrar and A. C. Fauth and N. Fazzini and F. Feldbusch and F. Fenu and B. Fick and J. M. Figueira and A. Filipčič and M. M. Freire and T. Fujii and A. Fuster and C. Galea and C. Galelli and B. García and A. L. Garcia Vegas and H. Gemmeke and F. Gesualdi and A. Gherghel-Lascu and P. L. Ghia and U. Giaccari and M. Giammarchi and M. Giller and J. Glombitza and F. Gobbi and G. Golup and M. Gómez Berisso and P. F. Gómez Vitale and J. P. Gongora and N. González and I. Goos and D. Góra and A. Gorgi and M. Gottowik and T. D. Grubb and F. Guarino and G. P. Guedes and E. Guido and S. Hahn and R. Halliday and M. R. Hampel and P. Hansen and D. Harari and V. M. Harvey and A. Haungs and T. Hebbeker and D. Heck and G. C. Hill and C. Hojvat and J. R. Hörandel and P. Horvath and M. Hrabovský and T. Huege and J. Hulsman and A. Insolia and P. G. Isar and J. A. Johnsen and J. Jurysek and A. Kääpä and K. H. Kampert and B. Keilhauer and J. Kemp and H. O. Klages and M. Kleifges and J. Kleinfeller and M. Köpke and G. Kukec Mezek and A. Kuotb Awad and B. L. Lago and D. LaHurd and R. G. Lang and M. A. Leigui de Oliveira and V. Lenok and A. Letessier-Selvon and I. Lhenry-Yvon and D. Lo Presti and L. Lopes and R. López and A. López Casado and R. Lorek and Q. Luce and A. Lucero and A. Machado Payeras and M. Malacari and G. Mancarella and D. Mandat and B. C. Manning and J. Manshanden and P. Mantsch and A. G. Mariazzi and I. C. Mariş and G. Marsella and D. Martello and H. Martinez and O. Martínez Bravo and M. Mastrodicasa and H. J. Mathes and J. Matthews and G. Matthiae and E. Mayotte and P. O. Mazur and G. Medina-Tanco and D. Melo and A. Menshikov and K. -D. Merenda and S. Michal and M. I. Micheletti and L. Miramonti and D. Mockler and S. Mollerach and F. Montanet and C. Morello and G. Morlino and M. Mostafá and A. L. Müller and M. A. Muller and S. Müller and R. Mussa and M. Muzio and W. M. Namasaka and L. Nellen and M. Niculescu-Oglinzanu and M. Niechciol and D. Nitz and D. Nosek and V. Novotny and L. Nožka and A Nucita and L. A. Núñez and M. Palatka and J. Pallotta and M. P. Panetta and P. Papenbreer and G. Parente and A. Parra and M. Pech and F. Pedreira and J. Pękala and R. Pelayo and J. Peña-Rodriguez and L. A. S. Pereira and J. Perez Armand and M. Perlin and L. Perrone and C. Peters and S. Petrera and T. Pierog and M. Pimenta and V. Pirronello and M. Platino and B. Pont and M. Pothast and P. Privitera and M. Prouza and A. Puyleart and S. Querchfeld and J. Rautenberg and D. Ravignani and M. Reininghaus and J. Ridky and F. Riehn and M. Risse and P. Ristori and V. Rizi and W. Rodrigues de Carvalho and J. Rodriguez Rojo and M. J. Roncoroni and M. Roth and E. Roulet and A. C. Rovero and P. Ruehl and S. J. Saffi and A. Saftoiu and F. Salamida and H. Salazar and G. Salina and J. D. Sanabria Gomez and F. Sánchez and E. M. Santos and E. Santos and F. Sarazin and R. Sarmento and C. Sarmiento-Cano and R. Sato and P. Savina and C. Schäfer and V. Scherini and H. Schieler and M. Schimassek and M. Schimp and F. Schlüter and D. Schmidt and O. Scholten and P. Schovánek and F. G. Schröder and S. Schröder and S. J. Sciutto and M. Scornavacche and R. C. Shellard and G. Sigl and G. Silli and O. Sima and R. Šmída and P. Sommers and J. F. Soriano and J. Souchard and R. Squartini and M. Stadelmaier and D. Stanca and S. Stanič and J. Stasielak and P. Stassi and A. Streich and M. Suárez-Durán and T. Sudholz and T. Suomijärvi and A. D. Supanitsky and J. Šupík and Z. Szadkowski and A. Taboada and O. A. Taborda and A. Tapia and C. Timmermans and P. Tobiska and C. J. Todero Peixoto and B. Tomé and G. Torralba Elipe and A. Travaini and P. Travnicek and C. Trimarelli and M. Trini and M. Tueros and R. Ulrich and M. Unger and M. Urban and L. Vaclavek and J. F. Valdés Galicia and I. Valiño and L. Valore and A. van Vliet and E. Varela and B. Vargas Cárdenas and A. Vásquez-Ramírez and D. Veberič and C. Ventura and I. D. Vergara Quispe and V. Verzi and J. Vicha and L. Villaseñor and J. Vink and S. Vorobiov and H. Wahlberg and A. A. Watson and M. Weber and A. Weindl and L. Wiencke and H. Wilczyński and T. Winchen and M. Wirtz and D. Wittkowski and B. Wundheiler and A. Yushkov and E. Zas and D. Zavrtanik and M. Zavrtanik and L. Zehrer and A. Zepeda and M. Ziolkowski and F. Zuccarello},
journal= {arXiv preprint arXiv:2002.06172},
year = {2021}
}
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Accepted by ApJ