Constraining the Diffusion Coefficient with HAWC TeV Gamma-Ray Observations of Two Nearby Pulsar Wind Nebulae

Zhou, Hao; Lopez-Coto, Ruben; Salesa Greus, Francisco

doi:10.22323/1.301.0690

Title: Constraining the Diffusion Coefficient with HAWC TeV Gamma-Ray Observations of Two Nearby Pulsar Wind Nebulae

Abstract

Nearby electron/positron accelerators, mostly Pulsar Wind Nebulae (PWNe), have been pro- posed as potential origins of the positron excess above 10 GeV. The HAWC Observatory reveals two very extended sources spatially coincident with two nearby middle-aged pulsars: Geminga and PSR B0656+14, suggesting ultra-relativistic electrons/positrons accelerated in our backyard. Morphological studies on these two PWNe provide a constraint on the diffusion coefficient at HAWC energies. In this poster, we will present the model development and morphological studies on these PWNe, and the derived diffusion coefficient that best fits the data.

Authors:

^[1]; Lopez-Coto, Ruben ^[2]; Salesa Greus, Francisco ^[3]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Max-Planck Inst. for Nuclear Physics, Heidelberg (Germany)
Polish Academy of Sciences (PAS), Krakow (Poland)

Publication Date:: Wed Aug 16 00:00:00 EDT 2017

Research Org.:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF); USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Org.:: HAWC Collaboration

OSTI Identifier:: 1688735

Report Number(s):: LA-UR-17-26568
Journal ID: ISSN 1824-8039; TRN: US2204132

Grant/Contract Number:: 89233218CNA000001

Resource Type:: Accepted Manuscript

Journal Name:: PoS - Proceedings of Science

Additional Journal Information:: Journal Volume: ICRC2017; Conference: 35.International Cosmic Ray Conference (ICRC2017) , Bexco, Busan (Korea), 10–20 Jul 2017; Journal ID: ISSN 1824-8039

Publisher:: SISSA

Country of Publication:: United States

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS; Astronomy and Astrophysics

Citation Formats


                    Zhou, Hao, Lopez-Coto, Ruben, and Salesa Greus, Francisco. Constraining the Diffusion Coefficient with HAWC TeV Gamma-Ray Observations of Two Nearby Pulsar Wind Nebulae.  United States: N. p., 2017. 
Web.  doi:10.22323/1.301.0690.

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                    Zhou, Hao, Lopez-Coto, Ruben, & Salesa Greus, Francisco. Constraining the Diffusion Coefficient with HAWC TeV Gamma-Ray Observations of Two Nearby Pulsar Wind Nebulae.  United States.  https://doi.org/10.22323/1.301.0690

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                    Zhou, Hao, Lopez-Coto, Ruben, and Salesa Greus, Francisco. Wed .  
"Constraining the Diffusion Coefficient with HAWC TeV Gamma-Ray Observations of Two Nearby Pulsar Wind Nebulae".  United States.  https://doi.org/10.22323/1.301.0690.  https://www.osti.gov/servlets/purl/1688735.

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@article{osti_1688735,

  title        = {Constraining the Diffusion Coefficient with HAWC TeV Gamma-Ray Observations of Two Nearby Pulsar Wind Nebulae},

  author       = {Zhou, Hao and Lopez-Coto, Ruben and Salesa Greus, Francisco},

  abstractNote = {Nearby electron/positron accelerators, mostly Pulsar Wind Nebulae (PWNe), have been pro- posed as potential origins of the positron excess above 10 GeV. The HAWC Observatory reveals two very extended sources spatially coincident with two nearby middle-aged pulsars: Geminga and PSR B0656+14, suggesting ultra-relativistic electrons/positrons accelerated in our backyard. Morphological studies on these two PWNe provide a constraint on the diffusion coefficient at HAWC energies. In this poster, we will present the model development and morphological studies on these PWNe, and the derived diffusion coefficient that best fits the data.},

  doi          = {10.22323/1.301.0690},

  journal      = {PoS - Proceedings of Science},

  number       = ,

  volume       = ICRC2017,

  place        = {United States},

  year         = {Wed Aug 16 00:00:00 EDT 2017},

  month        = {Wed Aug 16 00:00:00 EDT 2017}

}

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Works referenced in this record:

Electrons and positrons in the galactic cosmic rays
journal, September 1995

Atoyan, A. M.; Aharonian, F. A.; Völk, H. J.
Physical Review D, Vol. 52, Issue 6
DOI: 10.1103/physrevd.52.3265

Constraining the Origin of Local Positrons with HAWC TeV Gamma-Ray Observations of Two Nearby Pulsar Wind Nebulae
preprint, January 2017

Greus, F. Salesa; Casanova, S.; Dingus, B.
arXiv
DOI: 10.48550/arxiv.1708.08213

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Title: Constraining the Diffusion Coefficient with HAWC TeV Gamma-Ray Observations of Two Nearby Pulsar Wind Nebulae

Abstract

Citation Formats

Electrons and positrons in the galactic cosmic rays journal, September 1995

Constraining the Origin of Local Positrons with HAWC TeV Gamma-Ray Observations of Two Nearby Pulsar Wind Nebulae preprint, January 2017

Electrons and positrons in the galactic cosmic rays
journal, September 1995

Constraining the Origin of Local Positrons with HAWC TeV Gamma-Ray Observations of Two Nearby Pulsar Wind Nebulae
preprint, January 2017