Probing the Sea of Cosmic Rays by Measuring Gamma-Ray Emission from Passive Giant Molecular Clouds with HAWC

Probing the Sea of Cosmic Rays by Measuring Gamma-Ray Emission from Passive Giant Molecular Clouds with HAWC
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DOI：
10.3847/1538-4357/abfc47
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发表时间：
2021-01
期刊：
The Astrophysical Journal
影响因子：
--
通讯作者：
A. Albert;R. Alfaro;C. Álvarez;J. Angeles Camacho;J. C. Arteaga-Vel'azquez;K. Arunbabu;D. Avila Rojas;H. A. Ayala Solares;V. Baghmanyan;E. Belmont-Moreno;S. BenZvi;C. Brisbois;K. Caballero-Mora;T. Capistrán;A. Carramiñana;S. Casanova;U. Cotti;J. Cotzomi;S. Coutiño de León;E. de la Fuente;R. Díaz Hernández;B. Dingus;M. DuVernois;M. Durocher;J. C. Díaz-Vélez;R. Ellsworth;K. Engel;C. Espinoza;K. Fan;M. Fernandez Alonso;N. Fraija;A. Galv'an-G'amez;D. García;J. García-González;F. Garfias;M. González;J. Goodman;J. P. Harding;S. Hernández;B. Hona;D. Huang;F. Hueyotl-Zahuantitla;P. Hüntemeyer;A. Iriarte;V. Joshi;D. Kieda;A. Lara;W. Lee;J. Lee;H. León Vargas;J. Linnemann;A. Longinotti;G. Luis-Raya;J. Lundeen;K. Malone;O. Martinez;J. Martínez-Castro;J. Matthews;P. Miranda-Romagnoli;J. Morales-Soto;E. Moreno;M. Mostafá;A. Nayerhoda;L. Nellen;M. Newbold;M. Nisa;R. Noriega-Papaqui;N. Omodei;A. Peisker;Y. Pérez Araujo;E. Pérez-Pérez-E.-Pérez-Pérez-1431205495;C. Rho;D. Rosa-González;E. Ruiz-Velasco;F. Salesa Greus;A. Sandoval;M. Schneider;J. Serna-Franco;A. Smith;R. Springer;P. Surajbali;M. Tanner;K. Tollefson;I. Torres;R. Torres-Escobedo;R. Turner;F. Ureña-Mena;L. Villaseñor;T. Weisgarber;E. Willox;H. Zhou;C. de León
A. Albert;R. Alfaro;C. Álvarez;J. Angeles Camacho;J. C. Arteaga-Vel'azquez;K. Arunbabu;D. Avila Rojas;H. A. Ayala Solares;V. Baghmanyan;E. Belmont-Moreno;S. BenZvi;C. Brisbois;K. Caballero-Mora;T. Capistrán;A. Carramiñana;S. Casanova;U. Cotti;J. Cotzomi;S. Coutiño de León;E. de la Fuente;R. Díaz Hernández;B. Dingus;M. DuVernois;M. Durocher;J. C. Díaz-Vélez;R. Ellsworth;K. Engel;C. Espinoza;K. Fan;M. Fernandez Alonso;N. Fraija;A. Galv'an-G'amez;D. García;J. García-González;F. Garfias;M. González;J. Goodman;J. P. Harding;S. Hernández;B. Hona;D. Huang;F. Hueyotl-Zahuantitla;P. Hüntemeyer;A. Iriarte;V. Joshi;D. Kieda;A. Lara;W. Lee;J. Lee;H. León Vargas;J. Linnemann;A. Longinotti;G. Luis-Raya;J. Lundeen;K. Malone;O. Martinez;J. Martínez-Castro;J. Matthews;P. Miranda-Romagnoli;J. Morales-Soto;E. Moreno;M. Mostafá;A. Nayerhoda;L. Nellen;M. Newbold;M. Nisa;R. Noriega-Papaqui;N. Omodei;A. Peisker;Y. Pérez Araujo;E. Pérez-Pérez-E.-Pérez-Pérez-1431205495;C. Rho;D. Rosa-González;E. Ruiz-Velasco;F. Salesa Greus;A. Sandoval;M. Schneider;J. Serna-Franco;A. Smith;R. Springer;P. Surajbali;M. Tanner;K. Tollefson;I. Torres;R. Torres-Escobedo;R. Turner;F. Ureña-Mena;L. Villaseñor;T. Weisgarber;E. Willox;H. Zhou;C. de León
中科院分区：
其他
文献类型：
--
作者：
A. Albert;R. Alfaro;C. Álvarez;J. Angeles Camacho;J. C. Arteaga-Vel'azquez;K. Arunbabu;D. Avila Rojas;H. A. Ayala Solares;V. Baghmanyan;E. Belmont-Moreno;S. BenZvi;C. Brisbois;K. Caballero-Mora;T. Capistrán;A. Carramiñana;S. Casanova;U. Cotti;J. Cotzomi;S. Coutiño de León;E. de la Fuente;R. Díaz Hernández;B. Dingus;M. DuVernois;M. Durocher;J. C. Díaz-Vélez;R. Ellsworth;K. Engel;C. Espinoza;K. Fan;M. Fernandez Alonso;N. Fraija;A. Galv'an-G'amez;D. García;J. García-González;F. Garfias;M. González;J. Goodman;J. P. Harding;S. Hernández;B. Hona;D. Huang;F. Hueyotl-Zahuantitla;P. Hüntemeyer;A. Iriarte;V. Joshi;D. Kieda;A. Lara;W. Lee;J. Lee;H. León Vargas;J. Linnemann;A. Longinotti;G. Luis-Raya;J. Lundeen;K. Malone;O. Martinez;J. Martínez-Castro;J. Matthews;P. Miranda-Romagnoli;J. Morales-Soto;E. Moreno;M. Mostafá;A. Nayerhoda;L. Nellen;M. Newbold;M. Nisa;R. Noriega-Papaqui;N. Omodei;A. Peisker;Y. Pérez Araujo;E. Pérez-Pérez-E.-Pérez-Pérez-1431205495;C. Rho;D. Rosa-González;E. Ruiz-Velasco;F. Salesa Greus;A. Sandoval;M. Schneider;J. Serna-Franco;A. Smith;R. Springer;P. Surajbali;M. Tanner;K. Tollefson;I. Torres;R. Torres-Escobedo;R. Turner;F. Ureña-Mena;L. Villaseñor;T. Weisgarber;E. Willox;H. Zhou;C. de León

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对我们银河系中被动巨型分子云(GMC)产生的高能伽马射线的研究，是刻画和探索银河系遥远部分宇宙线“海洋”范式的一种间接方式。通过使用高海拔水切伦科夫天文台(HAWC)的数据，我们测量了一组这些云在1TeV以上的伽马射线通量，以检验这一范式。我们选择了HAWC视野中的高纬度云，这些云与太阳的距离在1KpC以内。我们在云区没有发现明显的过量排放，当我们对GMC进行堆叠对数似然分析时也没有发现。利用贝叶斯方法，我们计算了伽马射线通量的95%可信区间上限，并估计了这些区域的宇宙线能量密度极限。这是使用无源高星系纬度GMC将伽马射线发射限制在多TeV能量范围(&gt；1TeV)的第一个限制。假设主要的伽马射线产生机制是由于质子-质子相互作用，则上限与宇宙射线流量和能量密度一致，类似于在地球上测得的。
The study of high-energy gamma rays from passive giant molecular clouds (GMCs) in our Galaxy is an indirect way to characterize and probe the paradigm of the “sea” of cosmic rays in distant parts of the Galaxy. By using data from the High Altitude Water Cerenkov (HAWC) Observatory, we measure the gamma-ray flux above 1 TeV of a set of these clouds to test the paradigm. We selected high galactic latitude clouds that are in HAWC’s field of view and that are within 1 kpc distance from the Sun. We find no significant excess emission in the cloud regions, nor when we perform a stacked log-likelihood analysis of GMCs. Using a Bayesian approach, we calculate 95% credible interval upper limits of the gamma-ray flux and estimate limits on the cosmic-ray energy density of these regions. These are the first limits to constrain gamma-ray emission in the multi-TeV energy range (>1 TeV) using passive high galactic latitude GMCs. Assuming that the main gamma-ray production mechanism is due to proton–proton interaction, the upper limits are consistent with a cosmic-ray flux and energy density similar to that measured at Earth.