Discovery of TeV gamma-ray emission from the cygnus region of the galaxy

A. A. Abdu, B. Allen, D. Berley, E. Blaufuss, S. Casanova, C. Chen, D. G. Coyne, R. S. Delay, B. L. Dingus, R. W. Ellsworth, L. Fleysher, R. Fleysher, I. Gebauer, M. M. Gonzalez, J. A. Goodman, E. Hays, C. M. Huffman, B. E. Kolterman, L. A. Kelley, C. P. LansdellJ. T. Linnemann, J. E. Mcenery, A. I. Mincer, I. V. Moskalenko, P. Nemethy, D. Noyes, J. M. Ryan, F. W. Samuelson, P. M. Saz Parkinson, M. Schneider, A. Shoup, G. Sinnis, A. J. Smith, A. W. Strong, G. W. Sullivan, V. Vasileiou, G. P. Walker, D. A. Williams, X. W. Xu, G. B. Yodh

    Research output: Contribution to journalArticle

    Abstract

    The diffuse gamma radiation arising from the interaction of cosmic-ray particles with matter and radiation in the Galaxy is one of the few probes available to study the origin of the cosmic rays. Data from the Milagro gamma-ray observatory - a water Cerenkov detector that continuously views ∼2 sr of the overhead sky - shows that the brightest extended region in the entire northern sky is the Cygnus region of the Galactic plane. The TeV image of the Cygnus region contains at least one new source, MGRO J2019+37, which is 10.9 σ above the isotropic background, as well as correlations with the matter density in the region. However, the gamma-ray flux from the Cygnus region (after excluding MGRO J2019+37) as measured at ∼12 TeV exceeds that predicted from a model of cosmic-ray production and propagation. This observation indicates the existence of either hard-spectrum cosmic-ray sources and/or unresolved sources of TeV gamma rays in the region.

    Original languageEnglish (US)
    JournalAstrophysical Journal
    Volume658
    Issue number1 II
    DOIs
    StatePublished - Mar 20 2007

    Fingerprint

    cosmic rays
    gamma rays
    galaxies
    cosmic ray
    northern sky
    Gamma Ray Observatory
    sky
    propagation
    probes
    detectors
    radiation
    observatory
    probe
    water
    interactions

    Keywords

    • Acceleration of particles
    • Cosmic rays
    • Gamma rays: observations

    ASJC Scopus subject areas

    • Space and Planetary Science
    • Astronomy and Astrophysics

    Cite this

    Abdu, A. A., Allen, B., Berley, D., Blaufuss, E., Casanova, S., Chen, C., ... Yodh, G. B. (2007). Discovery of TeV gamma-ray emission from the cygnus region of the galaxy. Astrophysical Journal, 658(1 II). https://doi.org/10.1086/513696

    Discovery of TeV gamma-ray emission from the cygnus region of the galaxy. / Abdu, A. A.; Allen, B.; Berley, D.; Blaufuss, E.; Casanova, S.; Chen, C.; Coyne, D. G.; Delay, R. S.; Dingus, B. L.; Ellsworth, R. W.; Fleysher, L.; Fleysher, R.; Gebauer, I.; Gonzalez, M. M.; Goodman, J. A.; Hays, E.; Huffman, C. M.; Kolterman, B. E.; Kelley, L. A.; Lansdell, C. P.; Linnemann, J. T.; Mcenery, J. E.; Mincer, A. I.; Moskalenko, I. V.; Nemethy, P.; Noyes, D.; Ryan, J. M.; Samuelson, F. W.; Saz Parkinson, P. M.; Schneider, M.; Shoup, A.; Sinnis, G.; Smith, A. J.; Strong, A. W.; Sullivan, G. W.; Vasileiou, V.; Walker, G. P.; Williams, D. A.; Xu, X. W.; Yodh, G. B.

    In: Astrophysical Journal, Vol. 658, No. 1 II, 20.03.2007.

    Research output: Contribution to journalArticle

    Abdu, AA, Allen, B, Berley, D, Blaufuss, E, Casanova, S, Chen, C, Coyne, DG, Delay, RS, Dingus, BL, Ellsworth, RW, Fleysher, L, Fleysher, R, Gebauer, I, Gonzalez, MM, Goodman, JA, Hays, E, Huffman, CM, Kolterman, BE, Kelley, LA, Lansdell, CP, Linnemann, JT, Mcenery, JE, Mincer, AI, Moskalenko, IV, Nemethy, P, Noyes, D, Ryan, JM, Samuelson, FW, Saz Parkinson, PM, Schneider, M, Shoup, A, Sinnis, G, Smith, AJ, Strong, AW, Sullivan, GW, Vasileiou, V, Walker, GP, Williams, DA, Xu, XW & Yodh, GB 2007, 'Discovery of TeV gamma-ray emission from the cygnus region of the galaxy', Astrophysical Journal, vol. 658, no. 1 II. https://doi.org/10.1086/513696
    Abdu AA, Allen B, Berley D, Blaufuss E, Casanova S, Chen C et al. Discovery of TeV gamma-ray emission from the cygnus region of the galaxy. Astrophysical Journal. 2007 Mar 20;658(1 II). https://doi.org/10.1086/513696
    Abdu, A. A. ; Allen, B. ; Berley, D. ; Blaufuss, E. ; Casanova, S. ; Chen, C. ; Coyne, D. G. ; Delay, R. S. ; Dingus, B. L. ; Ellsworth, R. W. ; Fleysher, L. ; Fleysher, R. ; Gebauer, I. ; Gonzalez, M. M. ; Goodman, J. A. ; Hays, E. ; Huffman, C. M. ; Kolterman, B. E. ; Kelley, L. A. ; Lansdell, C. P. ; Linnemann, J. T. ; Mcenery, J. E. ; Mincer, A. I. ; Moskalenko, I. V. ; Nemethy, P. ; Noyes, D. ; Ryan, J. M. ; Samuelson, F. W. ; Saz Parkinson, P. M. ; Schneider, M. ; Shoup, A. ; Sinnis, G. ; Smith, A. J. ; Strong, A. W. ; Sullivan, G. W. ; Vasileiou, V. ; Walker, G. P. ; Williams, D. A. ; Xu, X. W. ; Yodh, G. B. / Discovery of TeV gamma-ray emission from the cygnus region of the galaxy. In: Astrophysical Journal. 2007 ; Vol. 658, No. 1 II.
    @article{a5a9a1d1f11b4627b8200306011d5edf,
    title = "Discovery of TeV gamma-ray emission from the cygnus region of the galaxy",
    abstract = "The diffuse gamma radiation arising from the interaction of cosmic-ray particles with matter and radiation in the Galaxy is one of the few probes available to study the origin of the cosmic rays. Data from the Milagro gamma-ray observatory - a water Cerenkov detector that continuously views ∼2 sr of the overhead sky - shows that the brightest extended region in the entire northern sky is the Cygnus region of the Galactic plane. The TeV image of the Cygnus region contains at least one new source, MGRO J2019+37, which is 10.9 σ above the isotropic background, as well as correlations with the matter density in the region. However, the gamma-ray flux from the Cygnus region (after excluding MGRO J2019+37) as measured at ∼12 TeV exceeds that predicted from a model of cosmic-ray production and propagation. This observation indicates the existence of either hard-spectrum cosmic-ray sources and/or unresolved sources of TeV gamma rays in the region.",
    keywords = "Acceleration of particles, Cosmic rays, Gamma rays: observations",
    author = "Abdu, {A. A.} and B. Allen and D. Berley and E. Blaufuss and S. Casanova and C. Chen and Coyne, {D. G.} and Delay, {R. S.} and Dingus, {B. L.} and Ellsworth, {R. W.} and L. Fleysher and R. Fleysher and I. Gebauer and Gonzalez, {M. M.} and Goodman, {J. A.} and E. Hays and Huffman, {C. M.} and Kolterman, {B. E.} and Kelley, {L. A.} and Lansdell, {C. P.} and Linnemann, {J. T.} and Mcenery, {J. E.} and Mincer, {A. I.} and Moskalenko, {I. V.} and P. Nemethy and D. Noyes and Ryan, {J. M.} and Samuelson, {F. W.} and {Saz Parkinson}, {P. M.} and M. Schneider and A. Shoup and G. Sinnis and Smith, {A. J.} and Strong, {A. W.} and Sullivan, {G. W.} and V. Vasileiou and Walker, {G. P.} and Williams, {D. A.} and Xu, {X. W.} and Yodh, {G. B.}",
    year = "2007",
    month = "3",
    day = "20",
    doi = "10.1086/513696",
    language = "English (US)",
    volume = "658",
    journal = "Astrophysical Journal",
    issn = "0004-637X",
    publisher = "IOP Publishing Ltd.",
    number = "1 II",

    }

    TY - JOUR

    T1 - Discovery of TeV gamma-ray emission from the cygnus region of the galaxy

    AU - Abdu, A. A.

    AU - Allen, B.

    AU - Berley, D.

    AU - Blaufuss, E.

    AU - Casanova, S.

    AU - Chen, C.

    AU - Coyne, D. G.

    AU - Delay, R. S.

    AU - Dingus, B. L.

    AU - Ellsworth, R. W.

    AU - Fleysher, L.

    AU - Fleysher, R.

    AU - Gebauer, I.

    AU - Gonzalez, M. M.

    AU - Goodman, J. A.

    AU - Hays, E.

    AU - Huffman, C. M.

    AU - Kolterman, B. E.

    AU - Kelley, L. A.

    AU - Lansdell, C. P.

    AU - Linnemann, J. T.

    AU - Mcenery, J. E.

    AU - Mincer, A. I.

    AU - Moskalenko, I. V.

    AU - Nemethy, P.

    AU - Noyes, D.

    AU - Ryan, J. M.

    AU - Samuelson, F. W.

    AU - Saz Parkinson, P. M.

    AU - Schneider, M.

    AU - Shoup, A.

    AU - Sinnis, G.

    AU - Smith, A. J.

    AU - Strong, A. W.

    AU - Sullivan, G. W.

    AU - Vasileiou, V.

    AU - Walker, G. P.

    AU - Williams, D. A.

    AU - Xu, X. W.

    AU - Yodh, G. B.

    PY - 2007/3/20

    Y1 - 2007/3/20

    N2 - The diffuse gamma radiation arising from the interaction of cosmic-ray particles with matter and radiation in the Galaxy is one of the few probes available to study the origin of the cosmic rays. Data from the Milagro gamma-ray observatory - a water Cerenkov detector that continuously views ∼2 sr of the overhead sky - shows that the brightest extended region in the entire northern sky is the Cygnus region of the Galactic plane. The TeV image of the Cygnus region contains at least one new source, MGRO J2019+37, which is 10.9 σ above the isotropic background, as well as correlations with the matter density in the region. However, the gamma-ray flux from the Cygnus region (after excluding MGRO J2019+37) as measured at ∼12 TeV exceeds that predicted from a model of cosmic-ray production and propagation. This observation indicates the existence of either hard-spectrum cosmic-ray sources and/or unresolved sources of TeV gamma rays in the region.

    AB - The diffuse gamma radiation arising from the interaction of cosmic-ray particles with matter and radiation in the Galaxy is one of the few probes available to study the origin of the cosmic rays. Data from the Milagro gamma-ray observatory - a water Cerenkov detector that continuously views ∼2 sr of the overhead sky - shows that the brightest extended region in the entire northern sky is the Cygnus region of the Galactic plane. The TeV image of the Cygnus region contains at least one new source, MGRO J2019+37, which is 10.9 σ above the isotropic background, as well as correlations with the matter density in the region. However, the gamma-ray flux from the Cygnus region (after excluding MGRO J2019+37) as measured at ∼12 TeV exceeds that predicted from a model of cosmic-ray production and propagation. This observation indicates the existence of either hard-spectrum cosmic-ray sources and/or unresolved sources of TeV gamma rays in the region.

    KW - Acceleration of particles

    KW - Cosmic rays

    KW - Gamma rays: observations

    UR - http://www.scopus.com/inward/record.url?scp=34047234914&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=34047234914&partnerID=8YFLogxK

    U2 - 10.1086/513696

    DO - 10.1086/513696

    M3 - Article

    AN - SCOPUS:34047234914

    VL - 658

    JO - Astrophysical Journal

    JF - Astrophysical Journal

    SN - 0004-637X

    IS - 1 II

    ER -