Diffuse γ-ray emission toward the massive star-forming region, W40

被引：30
|
作者：
Sun, Xiao-Na [1 ,2 ]
Yang, Rui-Zhi [3 ,4 ,5 ]
Liang, Yun-Feng [6 ]
Peng, Fang-Kun [7 ]
Zhang, Hai-Ming [1 ,2 ]
Wang, Xiang-Yu [1 ,2 ]
Aharonian, Felix [8 ,9 ]
机构：
[1] Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Peoples R China
[2] Nanjing Univ, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210093, Peoples R China
[3] Univ Sci & Technol China, Sch Phys Sci, Dept Astron, Hefei 230026, Anhui, Peoples R China
[4] Univ Sci & Technol China, CAS Key Labrotory Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China
[5] Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China
[6] Guangxi Univ, Dept Phys, Lab Relativist Astrophys, Nanning 530004, Peoples R China
[7] Anhui Normal Univ, Dept Phys, Wuhu 241000, Anhui, Peoples R China
[8] Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland
[9] Max Planck Inst Kernphys, Saupfercheckweg 1, D-69117 Heidelberg, Germany
来源：
ASTRONOMY & ASTROPHYSICS | 2020年 / 639卷 / 639期
基金：
国家重点研发计划;
关键词：
gamma rays: ISM; cosmic rays; MILKY-WAY; DISCOVERY; RADIATION; CLUSTER; CLOUDS; FERMI;
D O I：
10.1051/0004-6361/202037580
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report the detection of high-energy gamma-ray signal towards the young star-forming region, W40. Using 10-yr Pass 8 data from the Fermi Large Area Telescope (Fermi-LAT), we extracted an extended gamma-ray excess region with a significance of similar to 18 sigma. The radiation has a spectrum with a photon index of 2.49 +/- 0.01. The spatial correlation with the ionized gas content favors the hadronic origin of the gamma-ray emission. The total cosmic-ray (CR) proton energy in the gamma-ray production region is estimated to be the order of 10(47) erg. However, this could be a small fraction of the total energy released in cosmic rays (CRs) by local accelerators, presumably by massive stars, over the lifetime of the system. If so, W40, together with earlier detections of gamma-rays from Cygnus cocoon, Westerlund 1, Westerlund 2, NGC 3603, and 30 Dor C, supports the hypothesis that young star clusters are effective CR factories. The unique aspect of this result is that the gamma-ray emission is detected, for the first time, from a stellar cluster itself, rather than from the surrounding "cocoons".
引用
收藏
页数：7
相关论文
共 50 条
  • [31] Submillimeter Observations of Magnetic Fields in Massive Star-forming Region W75N
    Zeng, Lingzhen
    Zhang, Qizhou
    Alves, Felipe O.
    Ching, Tao-Chung
    Girart, Josep M.
    Liu, Junhao
    ASTROPHYSICAL JOURNAL, 2023, 954 (01):
  • [32] CHEMICAL SEGREGATION TOWARD MASSIVE HOT CORES: THE AFGL2591 STAR-FORMING REGION
    Jimenez-Serra, I.
    Zhang, Q.
    Viti, S.
    Martin-Pintado, J.
    de Wit, W. -J.
    ASTROPHYSICAL JOURNAL, 2012, 753 (01):
  • [33] DIFFERENT EVOLUTIONARY STAGES IN THE MASSIVE STAR-FORMING REGION W3 MAIN COMPLEX
    Wang, Yuan
    Beuther, Henrik
    Zhang, Qizhou
    Bik, Arjan
    Rodon, Javier A.
    Jiang, Zhibo
    Fallscheer, Cassandra
    ASTROPHYSICAL JOURNAL, 2012, 754 (02):
  • [34] [OI] disk emission in the Taurus star-forming region
    1600, EDP Sciences (566):
  • [35] The Herschel view of the massive star-forming region NGC 6334
    Russeil, D.
    Schneider, N.
    Anderson, L. D.
    Zavagno, A.
    Molinari, S.
    Persi, P.
    Bontemps, S.
    Motte, F.
    Ossenkopf, V.
    Andre, Ph.
    Arzoumanian, D.
    Bernard, J. -Ph.
    Deharveng, L.
    Didelon, P.
    Di Francesco, J.
    Elia, D.
    Hennemann, M.
    Hill, T.
    Koenyves, V.
    Li, J. Z.
    Martin, P. G.
    Luong, Q. Nguyen
    Peretto, N.
    Pezzuto, S.
    Polychroni, D.
    Roussel, H.
    Rygl, K. L. J.
    Spinoglio, L.
    Testi, L.
    Tige, J.
    Vavrek, R.
    Ward-Thompson, D.
    White, G.
    ASTRONOMY & ASTROPHYSICS, 2013, 554
  • [36] Chandra Observations of the Massive Star-forming Region Onsala 2
    Skinner, Stephen L.
    Sokal, Kimberly R.
    Gudel, Manuel
    ASTROPHYSICAL JOURNAL, 2019, 871 (01):
  • [37] [CII] emission properties of the massive star-forming region RCW 36 in a filamentary molecular cloud
    Suzuki, T.
    Oyabu, S.
    Ghosh, S. K.
    Ojha, D. K.
    Kaneda, H.
    Maeda, H.
    Nakagawa, T.
    Ninan, J. P.
    Vig, S.
    Hanaoka, M.
    Saito, F.
    Fujiwara, S.
    Kanayama, T.
    ASTRONOMY & ASTROPHYSICS, 2021, 651
  • [38] The massive star-forming region Cygnus OB2
    Wright, N. J.
    Drake, J. J.
    STAR CLUSTERS: BASIC GALACTIC BUILDING BLOCKS THROUGHOUT TIME AND SPACE, 2010, (266): : 551 - 554
  • [39] The massive star-forming region G323.74-0.26
    Walsh, AJ
    Lee, JK
    Burton, MG
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2002, 329 (02) : 475 - 480
  • [40] X-ray Emission from the Star-Forming Region NGC 602 in the SMC
    Oskinova, L. M.
    Ignace, R.
    GALAXY WARS: STELLAR POPULATIONS AND STAR FORMATION IN INTERACTING GALAXIES, 2010, 423 : 52 - +
12345