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

被引：10

作者：

Albert, A. ^{[1
]}

Alfaro, R. ^{[2
]}

Alvarez, C. ^{[3
]}

Angeles Camacho, J. R. ^{[2
]}

Arteaga-Velazquez, J. C. ^{[4
]}

Arunbabu, K. P. ^{[5
]}

Avila Rojas, D. ^{[2
]}

Ayala Solares, H. A. ^{[6
]}

Baghmanyan, V. ^{[7
]}

Belmont-Moreno, E. ^{[2
]}

BenZvi, S. Y. ^{[8
]}

Brisbois, C. ^{[9
]}

Caballero-Mora, K. S. ^{[3
]}

Capistran, T. ^{[10
]}

Carraminana, A. ^{[11
]}

Casanova, S. ^{[7
]}

Cotti, U. ^{[4
]}

Cotzomi, J. ^{[12
]}

Coutino de Leon, S. ^{[11
]}

de la Fuente, E. ^{[13
]}

Diaz Hernandez, R. ^{[11
]}

Dingus, B. L. ^{[1
]}

DuVernois, M. A. ^{[14
]}

Durocher, M. ^{[1
]}

Diaz-Velez, J. C. ^{[13
]}

Ellsworth, R. W. ^{[9
]}

Engel, K. ^{[9
]}

Espinoza, C. ^{[2
]}

Fan, K. L. ^{[9
]}

Fernandez Alonso, M. ^{[6
]}

Fraija, N. ^{[10
]}

Galvan-Gamez, A. ^{[10
]}

Garcia, D. ^{[2
]}

Garcia-Gonzalez, J. A. ^{[10
,31
]}

Garfias, F. ^{[10
]}

Gonzalez, M. M. ^{[10
]}

Goodman, J. A. ^{[9
]}

Harding, J. P. ^{[1
]}

Hernandez, S. ^{[2
]}

Hona, B. ^{[15
]}

Huang, D. ^{[16
]}

Hueyotl-Zahuantitla, F. ^{[3
]}

Huntemeyer, P. ^{[16
]}

Iriarte, A. ^{[10
]}

Joshi, V. ^{[17
]}

Kieda, D. ^{[15
]}

Lara, A. ^{[5
]}

Lee, W. H. ^{[10
]}

Lee, J. ^{[18
]}

Leon Vargas, H. ^{[2
]}

机构：

[1] Los Alamos Natl Lab, Phys Div, Los Alamos, NM 87545 USA

[2] Univ Nacl Autonoma Mexico, Inst Fis, Mexico City, DF, Mexico

[3] Univ Autonoma Chiapas, Tuxtla Gutierrez, Chiapas, Mexico

[4] Univ Michoacana, Morelia, Michoacan, Mexico

[5] Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City, DF, Mexico

[6] Penn State Univ, Dept Phys, 104 Davey Lab, University Pk, PA 16802 USA

[7] Phys Polish Acad Sci, Inst Nucl Phys, IFJ PAN, PL-31342 Krakow, Poland

[8] Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA

[9] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[10] Univ Nacl Autonoma Mexico, Inst Astron, Mexico City, DF, Mexico

[11] Inst Nacl Astrofis Opt & Electr, Puebla, Mexico

[12] Benemerita Univ Autonoma Puebla, Fac Ciencias Fis Matemat, Puebla, Mexico

[13] Univ Guadalajara, Dept Fis, Ctr Univ Ciencias Exactas & Ingn, Guadalajara, Mexico

[14] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[15] Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA

[16] Michigan Technol Univ, Dept Phys, Houghton, MI 49931 USA

[17] Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, D-91058 Erlangen, Germany

[18] Univ Seoul, Nat Sci Res Inst, Seoul, South Korea

[19] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[20] Univ Politecn Pachuca, Pachuca, Hgo, Mexico

[21] Inst Politecn Nacl, Ctr Invest Comp, Mexico City, DF, Mexico

[22] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA

[23] Univ Autonoma Estado Hidalgo, Pachuca, Hidalgo, Mexico

[24] Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City, DF, Mexico

[25] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[26] Max Planck Inst Nucl Phys, D-69117 Heidelberg, Germany

[27] Univ Valencia, Inst Fis Corpuscular, CSIC, E-46980 Valencia, Spain

[28] Calif Univ Penn, Dept Chem & Phys, California, PA 15419 USA

[29] Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Shanghai, Peoples R China

[30] Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai, Peoples R China

[31] Tecnol Monterrey, Escuela Ingn & Ciencias, Monterrey, Mexico

来源：

ASTROPHYSICAL JOURNAL | 2021年 / 914卷 / 02期

基金：

美国国家科学基金会;

关键词：

DISTANCES; CATALOG; REGION;

D O I：

10.3847/1538-4357/abfc47

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：14

共 34 条

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