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fermi large area telescope observations of two gamma-ray emission components from the quiescent sun

We report the detection of high-energy -rays from the quiescent Sun with the Large Area Telescope on board the Fermi Gamma-Ray Space Telescope ( Fermi ) during the first 18 months of the mission. These observations correspond to the recent period of low solar activity when the emission induced by co... Full description

Journal Title: The Astrophysical Journal 2011, Vol.734(2), p.116 (10pp)
Main Author: Abdo, A. A.
Other Authors: Ackermann, M. , Ajello, M. , Baldini, L. , Ballet, J. , Barbiellini, G. , Bastieri, D. , Bechtol, K. , Bellazzini, R. , Berenji, B. , Bonamente, E. , Borgland, A. W. , Bouvier, A. , Bregeon, J. , Brez, A. , Brigida, M. , Bruel, P. , Buehler, R. , Buson, S. , Caliandro, G. A. , Cameron, R. A. , Caraveo, P. A. , Casandjian, J. M. , Cecchi, C. , Charles, E. , Chekhtman, A. , Chiang, J. , Ciprini, S. , Claus, R. , Cohen-Tanugi, J. , Conrad, J. , Cutini, S. , De Angelis, A. , De Palma, F. , Dermer, C. D. , Digel, S. W. , Do Couto E Silva, E. , Drell, P. S. , Dubois, R. , Favuzzi, C. , Fegan, S. J. , Focke, W. B. , Fortin, P. , Frailis, M. , Funk, S. , Fusco, P. , Gargano, F. , Gasparrini, D. , Gehrels, N. , Germani, S. , Giglietto, N. , Giordano, F. , Giroletti, M. , Glanzman, T. , Godfrey, G. , Grenier, I. A. , Grillo, L. , Guiriec, S. , Hadasch, D. , Hays, E. , Hughes, R. E. , Iafrate, G. , Jóhannesson, G. , Johnson, A. S. , Johnson, T. J. , Kamae, T. , Katagiri, H. , Kataoka, J. , Knödlseder, J. , Kuss, M. , Lande, J. , Latronico, L. , Lee, S.-H. , Lionetto, A. M. , Longo, F. , Loparco, F. , Lott, B. , Lovellette, M. n. , Lubrano, P. , Makeev, A. , Mazziotta, M. N. , Mcenery, J. E. , Mehault, J. , Michelson, P. F. , Mitthumsiri, W. , Mizuno, T. , Moiseev, A. A. , Monte, C. , Monzani, M. E. , Morselli, A. , Moskalenko, I. V. , Murgia, S. , Nakamori, T. , Naumann-Godo, M. , Nolan, P. L. , Norris, J. P. , Nuss, E. , Ohsugi, T. , Okumura, A. , Omodei, N. , Orlando, E. , Ormes, J. F. , Ozaki, M. , Paneque, D. , Pelassa, V. , Pesce-Rollins, M. , Pierbattista, M. , Piron, F. , Porter, T. A. , Rainò, S. , Rando, R. , Razzano, M. , Reimer, A. , Reimer, O. , Reposeur, T. , Ritz, S. , Sadrozinski, H. F.-W. , Schalk, T. L. , Sgrò, C. , Share, G. H. , Siskind, E. J. , Smith, P. D. , Spandre, G. , Spinelli, P. , Strickman, M. S. , Strong, A. W. , Takahashi, H. , Tanaka, T. , Thayer, J. G. , Thayer, J. B. , Thompson, D. J. , Tibaldo, L. , Torres, D. F. , Tosti, G. , Tramacere, A. , Troja, E. , Uchiyama, Y. , Usher, T. L. , Vandenbroucke, J. , Vasileiou, V. , Vianello, G. , Vilchez, N. , Vitale, V. , Vladimirov, A. E. , Waite, A. P. , Wang, P. , Winer, B. L. , Wood, K. S. , Yang, Z. , Ziegler, M.
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0004-637X ; E-ISSN: 1538-4357 ; DOI: 10.1088/0004-637X/734/2/116
Link: http://dx.doi.org/10.1088/0004-637X/734/2/116
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title: fermi large area telescope observations of two gamma-ray emission components from the quiescent sun
format: Article
creator:
  • Abdo, A. A.
  • Ackermann, M.
  • Ajello, M.
  • Baldini, L.
  • Ballet, J.
  • Barbiellini, G.
  • Bastieri, D.
  • Bechtol, K.
  • Bellazzini, R.
  • Berenji, B.
  • Bonamente, E.
  • Borgland, A. W.
  • Bouvier, A.
  • Bregeon, J.
  • Brez, A.
  • Brigida, M.
  • Bruel, P.
  • Buehler, R.
  • Buson, S.
  • Caliandro, G. A.
  • Cameron, R. A.
  • Caraveo, P. A.
  • Casandjian, J. M.
  • Cecchi, C.
  • Charles, E.
  • Chekhtman, A.
  • Chiang, J.
  • Ciprini, S.
  • Claus, R.
  • Cohen-Tanugi, J.
  • Conrad, J.
  • Cutini, S.
  • De Angelis, A.
  • De Palma, F.
  • Dermer, C. D.
  • Digel, S. W.
  • Do Couto E Silva, E.
  • Drell, P. S.
  • Dubois, R.
  • Favuzzi, C.
  • Fegan, S. J.
  • Focke, W. B.
  • Fortin, P.
  • Frailis, M.
  • Funk, S.
  • Fusco, P.
  • Gargano, F.
  • Gasparrini, D.
  • Gehrels, N.
  • Germani, S.
  • Giglietto, N.
  • Giordano, F.
  • Giroletti, M.
  • Glanzman, T.
  • Godfrey, G.
  • Grenier, I. A.
  • Grillo, L.
  • Guiriec, S.
  • Hadasch, D.
  • Hays, E.
  • Hughes, R. E.
  • Iafrate, G.
  • Jóhannesson, G.
  • Johnson, A. S.
  • Johnson, T. J.
  • Kamae, T.
  • Katagiri, H.
  • Kataoka, J.
  • Knödlseder, J.
  • Kuss, M.
  • Lande, J.
  • Latronico, L.
  • Lee, S.-H.
  • Lionetto, A. M.
  • Longo, F.
  • Loparco, F.
  • Lott, B.
  • Lovellette, M. n.
  • Lubrano, P.
  • Makeev, A.
  • Mazziotta, M. N.
  • Mcenery, J. E.
  • Mehault, J.
  • Michelson, P. F.
  • Mitthumsiri, W.
  • Mizuno, T.
  • Moiseev, A. A.
  • Monte, C.
  • Monzani, M. E.
  • Morselli, A.
  • Moskalenko, I. V.
  • Murgia, S.
  • Nakamori, T.
  • Naumann-Godo, M.
  • Nolan, P. L.
  • Norris, J. P.
  • Nuss, E.
  • Ohsugi, T.
  • Okumura, A.
  • Omodei, N.
  • Orlando, E.
  • Ormes, J. F.
  • Ozaki, M.
  • Paneque, D.
  • Pelassa, V.
  • Pesce-Rollins, M.
  • Pierbattista, M.
  • Piron, F.
  • Porter, T. A.
  • Rainò, S.
  • Rando, R.
  • Razzano, M.
  • Reimer, A.
  • Reimer, O.
  • Reposeur, T.
  • Ritz, S.
  • Sadrozinski, H. F.-W.
  • Schalk, T. L.
  • Sgrò, C.
  • Share, G. H.
  • Siskind, E. J.
  • Smith, P. D.
  • Spandre, G.
  • Spinelli, P.
  • Strickman, M. S.
  • Strong, A. W.
  • Takahashi, H.
  • Tanaka, T.
  • Thayer, J. G.
  • Thayer, J. B.
  • Thompson, D. J.
  • Tibaldo, L.
  • Torres, D. F.
  • Tosti, G.
  • Tramacere, A.
  • Troja, E.
  • Uchiyama, Y.
  • Usher, T. L.
  • Vandenbroucke, J.
  • Vasileiou, V.
  • Vianello, G.
  • Vilchez, N.
  • Vitale, V.
  • Vladimirov, A. E.
  • Waite, A. P.
  • Wang, P.
  • Winer, B. L.
  • Wood, K. S.
  • Yang, Z.
  • Ziegler, M.
subjects:
  • Astrophysics - High Energy Astrophysical Phenomena
  • Astrophysics - Solar And Stellar Astrophysics
ispartof: The Astrophysical Journal, 2011, Vol.734(2), p.116 (10pp)
description: We report the detection of high-energy -rays from the quiescent Sun with the Large Area Telescope on board the Fermi Gamma-Ray Space Telescope ( Fermi ) during the first 18 months of the mission. These observations correspond to the recent period of low solar activity when the emission induced by cosmic rays (CRs) is brightest. For the first time, the high statistical significance of the observations allows clear separation of the two components: the point-like emission from the solar disk due to CR cascades in the solar atmosphere and extended emission from the inverse Compton (IC) scattering of CR electrons on solar photons in the heliosphere. The observed integral flux (100 MeV) from the solar disk is (4.6 ± 0.2[statistical error] +1.0 0.8 [systematic error]) × 10 7  cm 2  s 1 , which is 7 times higher than predicted by the nominal model of Seckel et al. In contrast, the observed integral flux (100 MeV) of the extended emission from a region of 20° radius centered on the Sun, but excluding the disk itself, (6.8 ± 0.7[stat.] +0.5 0.4 [syst.]) × 10 7  cm 2  s 1 , along with the observed spectrum and the angular profile, is in good agreement with the theoretical predictions for the IC emission.
language: eng
source:
identifier: ISSN: 0004-637X ; E-ISSN: 1538-4357 ; DOI: 10.1088/0004-637X/734/2/116
fulltext: fulltext
issn:
  • 0004-637X
  • 1538-4357
  • 0004637X
  • 15384357
url: Link


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titlefermi large area telescope observations of two gamma-ray emission components from the quiescent sun
creatorAbdo, A. A. ; Ackermann, M. ; Ajello, M. ; Baldini, L. ; Ballet, J. ; Barbiellini, G. ; Bastieri, D. ; Bechtol, K. ; Bellazzini, R. ; Berenji, B. ; Bonamente, E. ; Borgland, A. W. ; Bouvier, A. ; Bregeon, J. ; Brez, A. ; Brigida, M. ; Bruel, P. ; Buehler, R. ; Buson, S. ; Caliandro, G. A. ; Cameron, R. A. ; Caraveo, P. A. ; Casandjian, J. M. ; Cecchi, C. ; Charles, E. ; Chekhtman, A. ; Chiang, J. ; Ciprini, S. ; Claus, R. ; Cohen-Tanugi, J. ; Conrad, J. ; Cutini, S. ; De Angelis, A. ; De Palma, F. ; Dermer, C. D. ; Digel, S. W. ; Do Couto E Silva, E. ; Drell, P. S. ; Dubois, R. ; Favuzzi, C. ; Fegan, S. J. ; Focke, W. B. ; Fortin, P. ; Frailis, M. ; Funk, S. ; Fusco, P. ; Gargano, F. ; Gasparrini, D. ; Gehrels, N. ; Germani, S. ; Giglietto, N. ; Giordano, F. ; Giroletti, M. ; Glanzman, T. ; Godfrey, G. ; Grenier, I. A. ; Grillo, L. ; Guiriec, S. ; Hadasch, D. ; Hays, E. ; Hughes, R. E. ; Iafrate, G. ; Jóhannesson, G. ; Johnson, A. S. ; Johnson, T. J. ; Kamae, T. ; Katagiri, H. ; Kataoka, J. ; Knödlseder, J. ; Kuss, M. ; Lande, J. ; Latronico, L. ; Lee, S.-H. ; Lionetto, A. M. ; Longo, F. ; Loparco, F. ; Lott, B. ; Lovellette, M. n. ; Lubrano, P. ; Makeev, A. ; Mazziotta, M. N. ; Mcenery, J. E. ; Mehault, J. ; Michelson, P. F. ; Mitthumsiri, W. ; Mizuno, T. ; Moiseev, A. A. ; Monte, C. ; Monzani, M. E. ; Morselli, A. ; Moskalenko, I. V. ; Murgia, S. ; Nakamori, T. ; Naumann-Godo, M. ; Nolan, P. L. ; Norris, J. P. ; Nuss, E. ; Ohsugi, T. ; Okumura, A. ; Omodei, N. ; Orlando, E. ; Ormes, J. F. ; Ozaki, M. ; Paneque, D. ; Pelassa, V. ; Pesce-Rollins, M. ; Pierbattista, M. ; Piron, F. ; Porter, T. A. ; Rainò, S. ; Rando, R. ; Razzano, M. ; Reimer, A. ; Reimer, O. ; Reposeur, T. ; Ritz, S. ; Sadrozinski, H. F.-W. ; Schalk, T. L. ; Sgrò, C. ; Share, G. H. ; Siskind, E. J. ; Smith, P. D. ; Spandre, G. ; Spinelli, P. ; Strickman, M. S. ; Strong, A. W. ; Takahashi, H. ; Tanaka, T. ; Thayer, J. G. ; Thayer, J. B. ; Thompson, D. J. ; Tibaldo, L. ; Torres, D. F. ; Tosti, G. ; Tramacere, A. ; Troja, E. ; Uchiyama, Y. ; Usher, T. L. ; Vandenbroucke, J. ; Vasileiou, V. ; Vianello, G. ; Vilchez, N. ; Vitale, V. ; Vladimirov, A. E. ; Waite, A. P. ; Wang, P. ; Winer, B. L. ; Wood, K. S. ; Yang, Z. ; Ziegler, M.
ispartofThe Astrophysical Journal, 2011, Vol.734(2), p.116 (10pp)
identifier
descriptionWe report the detection of high-energy -rays from the quiescent Sun with the Large Area Telescope on board the Fermi Gamma-Ray Space Telescope ( Fermi ) during the first 18 months of the mission. These observations correspond to the recent period of low solar activity when the emission induced by cosmic rays (CRs) is brightest. For the first time, the high statistical significance of the observations allows clear separation of the two components: the point-like emission from the solar disk due to CR cascades in the solar atmosphere and extended emission from the inverse Compton (IC) scattering of CR electrons on solar photons in the heliosphere. The observed integral flux (100 MeV) from the solar disk is (4.6 ± 0.2[statistical error] +1.0 0.8 [systematic error]) × 10 7  cm 2  s 1 , which is 7 times higher than predicted by the nominal model of Seckel et al. In contrast, the observed integral flux (100 MeV) of the extended emission from a region of 20° radius centered on the Sun, but excluding the disk itself, (6.8 ± 0.7[stat.] +0.5 0.4 [syst.]) × 10 7  cm 2  s 1 , along with the observed spectrum and the angular profile, is in good agreement with the theoretical predictions for the IC emission.
languageeng
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subjectAstrophysics - High Energy Astrophysical Phenomena ; Astrophysics - Solar And Stellar Astrophysics;
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0Abdo, A. A.
1Ackermann, M.
2Ajello, M.
3Baldini, L.
4Ballet, J.
5Barbiellini, G.
6Bastieri, D.
7Bechtol, K.
8Bellazzini, R.
9Berenji, B.
10Bonamente, E.
11Borgland, A. W.
12Bouvier, A.
13Bregeon, J.
14Brez, A.
15Brigida, M.
16Bruel, P.
17Buehler, R.
18Buson, S.
19Caliandro, G. A.
20Cameron, R. A.
21Caraveo, P. A.
22Casandjian, J. M.
23Cecchi, C.
24Charles, E.
25Chekhtman, A.
26Chiang, J.
27Ciprini, S.
28Claus, R.
29Cohen-Tanugi, J.
30Conrad, J.
31Cutini, S.
32De Angelis, A.
33De Palma, F.
34Dermer, C. D.
35Digel, S. W.
36Do Couto E Silva, E.
37Drell, P. S.
38Dubois, R.
39Favuzzi, C.
40Fegan, S. J.
41Focke, W. B.
42Fortin, P.
43Frailis, M.
44Funk, S.
45Fusco, P.
46Gargano, F.
47Gasparrini, D.
48Gehrels, N.
49Germani, S.
50Giglietto, N.
51Giordano, F.
52Giroletti, M.
53Glanzman, T.
54Godfrey, G.
55Grenier, I. A.
56Grillo, L.
57Guiriec, S.
58Hadasch, D.
59Hays, E.
60Hughes, R. E.
61Iafrate, G.
62Jóhannesson, G.
63Johnson, A. S.
64Johnson, T. J.
65Kamae, T.
66Katagiri, H.
67Kataoka, J.
68Knödlseder, J.
69Kuss, M.
70Lande, J.
71Latronico, L.
72Lee, S.-H.
73Lionetto, A. M.
74Longo, F.
75Loparco, F.
76Lott, B.
77Lovellette, M. n.
78Lubrano, P.
79Makeev, A.
80Mazziotta, M. N.
81Mcenery, J. E.
82Mehault, J.
83Michelson, P. F.
84Mitthumsiri, W.
85Mizuno, T.
86Moiseev, A. A.
87Monte, C.
88Monzani, M. E.
89Morselli, A.
90Moskalenko, I. V.
91Murgia, S.
92Nakamori, T.
93Naumann-Godo, M.
94Nolan, P. L.
95Norris, J. P.
96Nuss, E.
97Ohsugi, T.
98Okumura, A.
99Omodei, N.
100...
title
0FERMI LARGE AREA TELESCOPE OBSERVATIONS OF TWO GAMMA-RAY EMISSION COMPONENTS FROM THE QUIESCENT SUN
1Fermi Large Area Telescope Observations of Two Gamma-Ray Emission Components from the Quiescent Sun
descriptionWe report the detection of high-energy -rays from the quiescent Sun with the Large Area Telescope on board the Fermi Gamma-Ray Space Telescope ( Fermi ) during the first 18 months of the mission. These observations correspond to the recent period of low solar activity when the emission induced by cosmic rays (CRs) is brightest. For the first time, the high statistical significance of the observations allows clear separation of the two components: the point-like emission from the solar disk due to CR cascades in the solar atmosphere and extended emission from the inverse Compton (IC) scattering of CR electrons on solar photons in the heliosphere. The observed integral flux (100 MeV) from the solar disk is (4.6 ± 0.2[statistical error] +1.0 0.8 [systematic error]) × 10 7  cm 2  s 1 , which is 7 times higher than predicted by the nominal model of Seckel et al. In contrast, the observed integral flux (100 MeV) of the extended emission from a region of 20° radius centered on the Sun, but excluding the disk itself, (6.8 ± 0.7[stat.] +0.5 0.4 [syst.]) × 10 7  cm 2  s 1 , along with the observed spectrum and the angular profile, is in good agreement with the theoretical predictions for the IC emission.
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titlefermi large area telescope observations of two gamma-ray emission components from the quiescent sun
creationdate20110620
authorAbdo, A. A. ; Ackermann, M. ; Ajello, M. ; Baldini, L. ; Ballet, J. ; Barbiellini, G. ; Bastieri, D. ; Bechtol, K. ; Bellazzini, R. ; Berenji, B. ; Bonamente, E. ; Borgland, A. W. ; Bouvier, A. ; Bregeon, J. ; Brez, A. ; Brigida, M. ; Bruel, P. ; Buehler, R. ; Buson, S. ; Caliandro, G. A. ; Cameron, R. A. ; Caraveo, P. A. ; Casandjian, J. M. ; Cecchi, C. ; Charles, E. ; Chekhtman, A. ; Chiang, J. ; Ciprini, S. ; Claus, R. ; Cohen-Tanugi, J. ; Conrad, J. ; Cutini, S. ; De Angelis, A. ; De Palma, F. ; Dermer, C. D. ; Digel, S. W. ; Do Couto E Silva, E. ; Drell, P. S. ; Dubois, R. ; Favuzzi, C. ; Fegan, S. J. ; Focke, W. B. ; Fortin, P. ; Frailis, M. ; Funk, S. ; Fusco, P. ; Gargano, F. ; Gasparrini, D. ; Gehrels, N. ; Germani, S. ; Giglietto, N. ; Giordano, F. ; Giroletti, M. ; Glanzman, T. ; Godfrey, G. ; Grenier, I. A. ; Grillo, L. ; Guiriec, S. ; Hadasch, D. ; Hays, E. ; Hughes, R. E. ; Iafrate, G. ; Jóhannesson, G. ; Johnson, A. S. ; Johnson, T. J. ; Kamae, T. ; Katagiri, H. ; Kataoka, J. ; Knödlseder, J. ; Kuss, M. ; Lande, J. ; Latronico, L. ; Lee, S.-H. ; Lionetto, A. M. ; Longo, F. ; Loparco, F. ; Lott, B. ; Lovellette, M. n. ; Lubrano, P. ; Makeev, A. ; Mazziotta, M. N. ; Mcenery, J. E. ; Mehault, J. ; Michelson, P. F. ; Mitthumsiri, W. ; Mizuno, T. ; Moiseev, A. A. ; Monte, C. ; Monzani, M. E. ; Morselli, A. ; Moskalenko, I. V. ; Murgia, S. ; Nakamori, T. ; Naumann-Godo, M. ; Nolan, P. L. ; Norris, J. P. ; Nuss, E. ; Ohsugi, T. ; Okumura, A. ; Omodei, N. ; Orlando, E. ; Ormes, J. F. ; Ozaki, M. ; Paneque, D. ; Pelassa, V. ; Pesce-Rollins, M. ; Pierbattista, M. ; Piron, F. ; Porter, T. A. ; Rainò, S. ; Rando, R. ; Razzano, M. ; Reimer, A. ; Reimer, O. ; Reposeur, T. ; Ritz, S. ; Sadrozinski, H. F.-W. ; Schalk, T. L. ; Sgrò, C. ; Share, G. H. ; Siskind, E. J. ; Smith, P. D. ; Spandre, G. ; Spinelli, P. ; Strickman, M. S. ; Strong, A. W. ; Takahashi, H. ; Tanaka, T. ; Thayer, J. G. ; Thayer, J. B. ; Thompson, D. J. ; Tibaldo, L. ; Torres, D. F. ; Tosti, G. ; Tramacere, A. ; Troja, E. ; Uchiyama, Y. ; Usher, T. L. ; Vandenbroucke, J. ; Vasileiou, V. ; Vianello, G. ; Vilchez, N. ; Vitale, V. ; Vladimirov, A. E. ; Waite, A. P. ; Wang, P. ; Winer, B. L. ; Wood, K. S. ; Yang, Z. ; Ziegler, M.
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0Abdo, A. A.
1Ackermann, M.
2Ajello, M.
3Baldini, L.
4Ballet, J.
5Barbiellini, G.
6Bastieri, D.
7Bechtol, K.
8Bellazzini, R.
9Berenji, B.
10Bonamente, E.
11Borgland, A. W.
12Bouvier, A.
13Bregeon, J.
14Brez, A.
15Brigida, M.
16Bruel, P.
17Buehler, R.
18Buson, S.
19Caliandro, G. A.
20Cameron, R. A.
21Caraveo, P. A.
22Casandjian, J. M.
23Cecchi, C.
24Charles, E.
25Chekhtman, A.
26Chiang, J.
27Ciprini, S.
28Claus, R.
29Cohen-Tanugi, J.
30Conrad, J.
31Cutini, S.
32De Angelis, A.
33De Palma, F.
34Dermer, C. D.
35Digel, S. W.
36Do Couto E Silva, E.
37Drell, P. S.
38Dubois, R.
39Favuzzi, C.
40Fegan, S. J.
41Focke, W. B.
42Fortin, P.
43Frailis, M.
44Funk, S.
45Fusco, P.
46Gargano, F.
47Gasparrini, D.
48Gehrels, N.
49Germani, S.
50Giglietto, N.
51Giordano, F.
52Giroletti, M.
53Glanzman, T.
54Godfrey, G.
55Grenier, I. A.
56Grillo, L.
57Guiriec, S.
58Hadasch, D.
59Hays, E.
60Hughes, R. E.
61Iafrate, G.
62Jóhannesson, G.
63Johnson, A. S.
64Johnson, T. J.
65Kamae, T.
66Katagiri, H.
67Kataoka, J.
68Knödlseder, J.
69Kuss, M.
70Lande, J.
71Latronico, L.
72Lee, S.-H.
73Lionetto, A. M.
74Longo, F.
75Loparco, F.
76Lott, B.
77Lovellette, M. n.
78Lubrano, P.
79Makeev, A.
80Mazziotta, M. N.
81Mcenery, J. E.
82Mehault, J.
83Michelson, P. F.
84Mitthumsiri, W.
85Mizuno, T.
86Moiseev, A. A.
87Monte, C.
88Monzani, M. E.
89Morselli, A.
90Moskalenko, I. V.
91Murgia, S.
92Nakamori, T.
93Naumann-Godo, M.
94Nolan, P. L.
95Norris, J. P.
96Nuss, E.
97Ohsugi, T.
98Okumura, A.
99Omodei, N.
100...
jtitleAstrophysical Journal
toplevelpeer_reviewed
delivery
delcategoryRemote Search Resource
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1Ackermann
2Ajello
3Baldini
4Ballet
5Barbiellini
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9Berenji
10Bonamente
11Borgland
12Bouvier
13Bregeon
14Brez
15Brigida
16Bruel
17Buehler
18Buson
19Caliandro
20Cameron
21Caraveo
22Casandjian
23Cecchi
24Charles
25Chekhtman
26Chiang
27Ciprini
28Claus
29Cohen-Tanugi
30Conrad
31Cutini
32de Angelis
33de Palma
34Dermer
35Digel
36do Couto e Silva
37Drell
38Dubois
39Favuzzi
40Fegan
41Focke
42Fortin
43Frailis
44Funk
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46Gargano
47Gasparrini
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55Grenier
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59Hays
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61Iafrate
62Jóhannesson
63Johnson
64Kamae
65Katagiri
66Kataoka
67Knödlseder
68Kuss
69Lande
70Latronico
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74Loparco
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76Lovellette
77Lubrano
78Makeev
79Mazziotta
80McEnery
81Mehault
82Michelson
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100...
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0A. A.
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3J.
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8B.
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37P. F.
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54J. B.
55D. J.
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61K. S.
62Z.
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0Abdo, A. A.
1Ackermann, M.
2Ajello, M.
3Baldini, L.
4Ballet, J.
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6Bastieri, D.
7Bechtol, K.
8Bellazzini, R.
9Berenji, B.
10Bonamente, E.
11Borgland, A. W.
12Bouvier, A.
13Bregeon, J.
14Brez, A.
15Brigida, M.
16Bruel, P.
17Buehler, R.
18Buson, S.
19Caliandro, G. A.
20Cameron, R. A.
21Caraveo, P. A.
22Casandjian, J. M.
23Cecchi, C.
24Charles, E.
25Chekhtman, A.
26Chiang, J.
27Ciprini, S.
28Claus, R.
29Cohen-Tanugi, J.
30Conrad, J.
31Cutini, S.
32de Angelis, A.
33de Palma, F.
34Dermer, C. D.
35Digel, S. W.
36do Couto e Silva, E.
37Drell, P. S.
38Dubois, R.
39Favuzzi, C.
40Fegan, S. J.
41Focke, W. B.
42Fortin, P.
43Frailis, M.
44Funk, S.
45Fusco, P.
46Gargano, F.
47Gasparrini, D.
48Gehrels, N.
49Germani, S.
50Giglietto, N.
51Giordano, F.
52Giroletti, M.
53Glanzman, T.
54Godfrey, G.
55Grenier, I. A.
56Grillo, L.
57Guiriec, S.
58Hadasch, D.
59Hays, E.
60Hughes, R. E.
61Iafrate, G.
62Jóhannesson, G.
63Johnson, A. S.
64Johnson, T. J.
65Kamae, T.
66Katagiri, H.
67Kataoka, J.
68Knödlseder, J.
69Kuss, M.
70Lande, J.
71Latronico, L.
72Lee, S.-H.
73Lionetto, A. M.
74Longo, F.
75Loparco, F.
76Lott, B.
77Lovellette, M. N.
78Lubrano, P.
79Makeev, A.
80Mazziotta, M. N.
81McEnery, J. E.
82Mehault, J.
83Michelson, P. F.
84Mitthumsiri, W.
85Mizuno, T.
86Moiseev, A. A.
87Monte, C.
88Monzani, M. E.
89Morselli, A.
90Moskalenko, I. V.
91Murgia, S.
92Nakamori, T.
93Naumann-Godo, M.
94Nolan, P. L.
95Norris, J. P.
96Nuss, E.
97Ohsugi, T.
98Okumura, A.
99Omodei, N.
100...
atitleFERMI LARGE AREA TELESCOPE OBSERVATIONS OF TWO GAMMA-RAY EMISSION COMPONENTS FROM THE QUIESCENT SUN
jtitleThe Astrophysical Journal
stitleFERMI LARGE AREA TELESCOPE OBSERVATIONS OF TWO GAMMA-RAY EMISSION COMPONENTS FROM THE QUIESCENT SUN
risdate20110620
volume734
issue2
spage116
pages10
issn0004-637X
eissn1538-4357
formatjournal
genrearticle
ristypeJOUR
abstractWe report the detection of high-energy -rays from the quiescent Sun with the Large Area Telescope on board the Fermi Gamma-Ray Space Telescope ( Fermi ) during the first 18 months of the mission. These observations correspond to the recent period of low solar activity when the emission induced by cosmic rays (CRs) is brightest. For the first time, the high statistical significance of the observations allows clear separation of the two components: the point-like emission from the solar disk due to CR cascades in the solar atmosphere and extended emission from the inverse Compton (IC) scattering of CR electrons on solar photons in the heliosphere. The observed integral flux (100 MeV) from the solar disk is (4.6 ± 0.2[statistical error] +1.0 0.8 [systematic error]) × 10 7  cm 2  s 1 , which is 7 times higher than predicted by the nominal model of Seckel et al. In contrast, the observed integral flux (100 MeV) of the extended emission from a region of 20° radius centered on the Sun, but excluding the disk itself, (6.8 ± 0.7[stat.] +0.5 0.4 [syst.]) × 10 7  cm 2  s 1 , along with the observed spectrum and the angular profile, is in good agreement with the theoretical predictions for the IC emission.
doi10.1088/0004-637X/734/2/116
orcidid0000-0002-0014-7809: 0000-0001-6885-7156
date2011-06-20