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Gamma-ray emission from the shell of supernova remnant W44 revealed by the Fermi LAT

Recent observations of supernova remnants (SNRs) hint that they accelerate cosmic rays to energies close to ~10(15) electron volts. However, the nature of the particles that produce the emission remains ambiguous. We report observations of SNR W44 with the Fermi Large Area Telescope at energies betw... Full description

Journal Title: Science (New York N.Y.), 26 February 2010, Vol.327(5969), pp.1103-6
Main Author: Abdo, A A
Other Authors: Ackermann, M , Ajello, M , Baldini, L , Ballet, J , Barbiellini, G , Baring, M G , Bastieri, D , Baughman, B M , Bechtol, K , Bellazzini, R , Berenji, B , Blandford, R D , Bloom, E D , Bonamente, E , Borgland, A W , Bregeon, J , Brez, A , Brigida, M , Bruel, P , Burnett, T H , Buson, S , Caliandro, G A , Cameron, R A , Caraveo, P A , Casandjian, J M , Cecchi, C , Celik, O , Chekhtman, A , Cheung, C C , Chiang, J , Ciprini, S , Claus, R , Cognard, I , Cohen-Tanugi, J , Cominsky, L R , Conrad, J , Cutini, S , Dermer, C D , De Angelis, A , De Palma, F , Digel, S W , Do Couto E Silva, E , Drell, P S , Dubois, R , Dumora, D , Espinoza, C , Farnier, C , Favuzzi, C , Fegan, S J , Focke, W B , Fortin, P , Frailis, M , Fukazawa, Y , Funk, S , Fusco, P , Gargano, F , Gasparrini, D , Gehrels, N , Germani, S , Giavitto, G , Giebels, B , Giglietto, N , Giordano, F , Glanzman, T , Godfrey, G , Grenier, I A , Grondin, M-H , Grove, J E , Guillemot, L , Guiriec, S , Hanabata, Y , Harding, A K , Hayashida, M , Hays, E , Hughes, R E , Jackson, M S , Jóhannesson, G , Johnson, A S , Johnson, T J , Johnson, W N , Kamae, T , Katagiri, H , Kataoka, J , Katsuta, J , Kawai, N , Kerr, M , Knödlseder, J , Kocian, M L , Kramer, M , Kuss, M , Lande, J , Latronico, L , Lemoine-Goumard, M , Longo, F , Loparco, F , Lott, B , Lovellette, M N , Lubrano, P , Lyne, A G , Madejski, G M , Makeev, A , Mazziotta, M N , Mcenery, J E , Meurer, C , Michelson, P F , Mitthumsiri, W , Mizuno, T , Monte, C , Monzani, M E , Morselli, A , Moskalenko, I V , Murgia, S , Nakamori, T , Nolan, P L , Norris, J P , Noutsos, A , Nuss, E , Ohsugi, T , Omodei, N , Orlando, E , Ormes, J F , Paneque, D , Parent, D , Pelassa, V , Pepe, M , Pesce-Rollins, M , Piron, F , Porter, T A , Rainò, S , Rando, R , Razzano, M , Reimer, A , Reimer, O , Reposeur, T , Rochester, L S , Rodriguez, A Y , Romani, R W , Roth, M , Ryde, F , Sadrozinski, H F-W , Sanchez, D , Sander, A , Saz Parkinson, P M , Scargle, J D , Sgrò, C , Siskind, E J , Smith, D A , Smith, P D , Spandre, G , Spinelli, P , Stappers, B W , Stecker, F W , Strickman, M S , Suson, D J , Tajima, H , Takahashi, H , Takahashi, T , Tanaka, T , Thayer, J B , Thayer, J G , Theureau, G , Thompson, D J , Tibaldo, L , Tibolla, O , Torres, D F , Tosti, G , Tramacere, A , Uchiyama, Y , Usher, T L , Vasileiou, V , Venter, C , Vilchez, N , Vitale, V , Waite, A P , Wang, P , Winer, B L , Wood, K S , Yamazaki, R , Ylinen, T , Ziegler, M
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: E-ISSN: 1095-9203 ; PMID: 20056857 Version:1 ; DOI: 10.1126/science.1182787
Link: http://pubmed.gov/20056857
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title: Gamma-ray emission from the shell of supernova remnant W44 revealed by the Fermi LAT
format: Article
creator:
  • Abdo, A A
  • Ackermann, M
  • Ajello, M
  • Baldini, L
  • Ballet, J
  • Barbiellini, G
  • Baring, M G
  • Bastieri, D
  • Baughman, B M
  • Bechtol, K
  • Bellazzini, R
  • Berenji, B
  • Blandford, R D
  • Bloom, E D
  • Bonamente, E
  • Borgland, A W
  • Bregeon, J
  • Brez, A
  • Brigida, M
  • Bruel, P
  • Burnett, T H
  • Buson, S
  • Caliandro, G A
  • Cameron, R A
  • Caraveo, P A
  • Casandjian, J M
  • Cecchi, C
  • Celik, O
  • Chekhtman, A
  • Cheung, C C
  • Chiang, J
  • Ciprini, S
  • Claus, R
  • Cognard, I
  • Cohen-Tanugi, J
  • Cominsky, L R
  • Conrad, J
  • Cutini, S
  • Dermer, C D
  • De Angelis, A
  • De Palma, F
  • Digel, S W
  • Do Couto E Silva, E
  • Drell, P S
  • Dubois, R
  • Dumora, D
  • Espinoza, C
  • Farnier, C
  • Favuzzi, C
  • Fegan, S J
  • Focke, W B
  • Fortin, P
  • Frailis, M
  • Fukazawa, Y
  • Funk, S
  • Fusco, P
  • Gargano, F
  • Gasparrini, D
  • Gehrels, N
  • Germani, S
  • Giavitto, G
  • Giebels, B
  • Giglietto, N
  • Giordano, F
  • Glanzman, T
  • Godfrey, G
  • Grenier, I A
  • Grondin, M-H
  • Grove, J E
  • Guillemot, L
  • Guiriec, S
  • Hanabata, Y
  • Harding, A K
  • Hayashida, M
  • Hays, E
  • Hughes, R E
  • Jackson, M S
  • Jóhannesson, G
  • Johnson, A S
  • Johnson, T J
  • Johnson, W N
  • Kamae, T
  • Katagiri, H
  • Kataoka, J
  • Katsuta, J
  • Kawai, N
  • Kerr, M
  • Knödlseder, J
  • Kocian, M L
  • Kramer, M
  • Kuss, M
  • Lande, J
  • Latronico, L
  • Lemoine-Goumard, M
  • Longo, F
  • Loparco, F
  • Lott, B
  • Lovellette, M N
  • Lubrano, P
  • Lyne, A G
  • Madejski, G M
  • Makeev, A
  • Mazziotta, M N
  • Mcenery, J E
  • Meurer, C
  • Michelson, P F
  • Mitthumsiri, W
  • Mizuno, T
  • Monte, C
  • Monzani, M E
  • Morselli, A
  • Moskalenko, I V
  • Murgia, S
  • Nakamori, T
  • Nolan, P L
  • Norris, J P
  • Noutsos, A
  • Nuss, E
  • Ohsugi, T
  • Omodei, N
  • Orlando, E
  • Ormes, J F
  • Paneque, D
  • Parent, D
  • Pelassa, V
  • Pepe, M
  • Pesce-Rollins, M
  • Piron, F
  • Porter, T A
  • Rainò, S
  • Rando, R
  • Razzano, M
  • Reimer, A
  • Reimer, O
  • Reposeur, T
  • Rochester, L S
  • Rodriguez, A Y
  • Romani, R W
  • Roth, M
  • Ryde, F
  • Sadrozinski, H F-W
  • Sanchez, D
  • Sander, A
  • Saz Parkinson, P M
  • Scargle, J D
  • Sgrò, C
  • Siskind, E J
  • Smith, D A
  • Smith, P D
  • Spandre, G
  • Spinelli, P
  • Stappers, B W
  • Stecker, F W
  • Strickman, M S
  • Suson, D J
  • Tajima, H
  • Takahashi, H
  • Takahashi, T
  • Tanaka, T
  • Thayer, J B
  • Thayer, J G
  • Theureau, G
  • Thompson, D J
  • Tibaldo, L
  • Tibolla, O
  • Torres, D F
  • Tosti, G
  • Tramacere, A
  • Uchiyama, Y
  • Usher, T L
  • Vasileiou, V
  • Venter, C
  • Vilchez, N
  • Vitale, V
  • Waite, A P
  • Wang, P
  • Winer, B L
  • Wood, K S
  • Yamazaki, R
  • Ylinen, T
  • Ziegler, M
subjects:
  • Supernova Remnants -- Observations
  • Gamma Rays -- Observations
ispartof: Science (New York, N.Y.), 26 February 2010, Vol.327(5969), pp.1103-6
description: Recent observations of supernova remnants (SNRs) hint that they accelerate cosmic rays to energies close to ~10(15) electron volts. However, the nature of the particles that produce the emission remains ambiguous. We report observations of SNR W44 with the Fermi Large Area Telescope at energies between 2 x 10(8) electron volts and 3 x10(11) electron volts. The detection of a source with a morphology corresponding to the SNR shell implies that the emission is produced by particles accelerated there. The gamma-ray spectrum is well modeled with emission from protons and nuclei. Its steepening above approximately 10(9) electron volts provides a probe with which to study how particle acceleration responds to environmental effects such as shock propagation in dense clouds and how accelerated particles are released into interstellar space.
language: eng
source:
identifier: E-ISSN: 1095-9203 ; PMID: 20056857 Version:1 ; DOI: 10.1126/science.1182787
fulltext: fulltext
issn:
  • 10959203
  • 1095-9203
url: Link


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titleGamma-ray emission from the shell of supernova remnant W44 revealed by the Fermi LAT
creatorAbdo, A A ; Ackermann, M ; Ajello, M ; Baldini, L ; Ballet, J ; Barbiellini, G ; Baring, M G ; Bastieri, D ; Baughman, B M ; Bechtol, K ; Bellazzini, R ; Berenji, B ; Blandford, R D ; Bloom, E D ; Bonamente, E ; Borgland, A W ; Bregeon, J ; Brez, A ; Brigida, M ; Bruel, P ; Burnett, T H ; Buson, S ; Caliandro, G A ; Cameron, R A ; Caraveo, P A ; Casandjian, J M ; Cecchi, C ; Celik, O ; Chekhtman, A ; Cheung, C C ; Chiang, J ; Ciprini, S ; Claus, R ; Cognard, I ; Cohen-Tanugi, J ; Cominsky, L R ; Conrad, J ; Cutini, S ; Dermer, C D ; De Angelis, A ; De Palma, F ; Digel, S W ; Do Couto E Silva, E ; Drell, P S ; Dubois, R ; Dumora, D ; Espinoza, C ; Farnier, C ; Favuzzi, C ; Fegan, S J ; Focke, W B ; Fortin, P ; Frailis, M ; Fukazawa, Y ; Funk, S ; Fusco, P ; Gargano, F ; Gasparrini, D ; Gehrels, N ; Germani, S ; Giavitto, G ; Giebels, B ; Giglietto, N ; Giordano, F ; Glanzman, T ; Godfrey, G ; Grenier, I A ; Grondin, M-H ; Grove, J E ; Guillemot, L ; Guiriec, S ; Hanabata, Y ; Harding, A K ; Hayashida, M ; Hays, E ; Hughes, R E ; Jackson, M S ; Jóhannesson, G ; Johnson, A S ; Johnson, T J ; Johnson, W N ; Kamae, T ; Katagiri, H ; Kataoka, J ; Katsuta, J ; Kawai, N ; Kerr, M ; Knödlseder, J ; Kocian, M L ; Kramer, M ; Kuss, M ; Lande, J ; Latronico, L ; Lemoine-Goumard, M ; Longo, F ; Loparco, F ; Lott, B ; Lovellette, M N ; Lubrano, P ; Lyne, A G ; Madejski, G M ; Makeev, A ; Mazziotta, M N ; Mcenery, J E ; Meurer, C ; Michelson, P F ; Mitthumsiri, W ; Mizuno, T ; Monte, C ; Monzani, M E ; Morselli, A ; Moskalenko, I V ; Murgia, S ; Nakamori, T ; Nolan, P L ; Norris, J P ; Noutsos, A ; Nuss, E ; Ohsugi, T ; Omodei, N ; Orlando, E ; Ormes, J F ; Paneque, D ; Parent, D ; Pelassa, V ; Pepe, M ; Pesce-Rollins, M ; Piron, F ; Porter, T A ; Rainò, S ; Rando, R ; Razzano, M ; Reimer, A ; Reimer, O ; Reposeur, T ; Rochester, L S ; Rodriguez, A Y ; Romani, R W ; Roth, M ; Ryde, F ; Sadrozinski, H F-W ; Sanchez, D ; Sander, A ; Saz Parkinson, P M ; Scargle, J D ; Sgrò, C ; Siskind, E J ; Smith, D A ; Smith, P D ; Spandre, G ; Spinelli, P ; Stappers, B W ; Stecker, F W ; Strickman, M S ; Suson, D J ; Tajima, H ; Takahashi, H ; Takahashi, T ; Tanaka, T ; Thayer, J B ; Thayer, J G ; Theureau, G ; Thompson, D J ; Tibaldo, L ; Tibolla, O ; Torres, D F ; Tosti, G ; Tramacere, A ; Uchiyama, Y ; Usher, T L ; Vasileiou, V ; Venter, C ; Vilchez, N ; Vitale, V ; Waite, A P ; Wang, P ; Winer, B L ; Wood, K S ; Yamazaki, R ; Ylinen, T ; Ziegler, M
ispartofScience (New York, N.Y.), 26 February 2010, Vol.327(5969), pp.1103-6
identifier
descriptionRecent observations of supernova remnants (SNRs) hint that they accelerate cosmic rays to energies close to ~10(15) electron volts. However, the nature of the particles that produce the emission remains ambiguous. We report observations of SNR W44 with the Fermi Large Area Telescope at energies between 2 x 10(8) electron volts and 3 x10(11) electron volts. The detection of a source with a morphology corresponding to the SNR shell implies that the emission is produced by particles accelerated there. The gamma-ray spectrum is well modeled with emission from protons and nuclei. Its steepening above approximately 10(9) electron volts provides a probe with which to study how particle acceleration responds to environmental effects such as shock propagation in dense clouds and how accelerated particles are released into interstellar space.
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0Abdo, A A
1Ackermann, M
2Ajello, M
3Baldini, L
4Ballet, J
5Barbiellini, G
6Baring, M G
7Bastieri, D
8Baughman, B M
9Bechtol, K
10Bellazzini, R
11Berenji, B
12Blandford, R D
13Bloom, E D
14Bonamente, E
15Borgland, A W
16Bregeon, J
17Brez, A
18Brigida, M
19Bruel, P
20Burnett, T H
21Buson, S
22Caliandro, G A
23Cameron, R A
24Caraveo, P A
25Casandjian, J M
26Cecchi, C
27Celik, O
28Chekhtman, A
29Cheung, C C
30Chiang, J
31Ciprini, S
32Claus, R
33Cognard, I
34Cohen-Tanugi, J
35Cominsky, L R
36Conrad, J
37Cutini, S
38Dermer, C D
39de Angelis, A
40de Palma, F
41Digel, S W
42do Couto e Silva, E
43Drell, P S
44Dubois, R
45Dumora, D
46Espinoza, C
47Farnier, C
48Favuzzi, C
49Fegan, S J
50Focke, W B
51Fortin, P
52Frailis, M
53Fukazawa, Y
54Funk, S
55Fusco, P
56Gargano, F
57Gasparrini, D
58Gehrels, N
59Germani, S
60Giavitto, G
61Giebels, B
62Giglietto, N
63Giordano, F
64Glanzman, T
65Godfrey, G
66Grenier, I A
67Grondin, M-H
68Grove, J E
69Guillemot, L
70Guiriec, S
71Hanabata, Y
72Harding, A K
73Hayashida, M
74Hays, E
75Hughes, R E
76Jackson, M S
77Jóhannesson, G
78Johnson, A S
79Johnson, T J
80Johnson, W N
81Kamae, T
82Katagiri, H
83Kataoka, J
84Katsuta, J
85Kawai, N
86Kerr, M
87Knödlseder, J
88Kocian, M L
89Kramer, M
90Kuss, M
91Lande, J
92Latronico, L
93Lemoine-Goumard, M
94Longo, F
95Loparco, F
96Lott, B
97Lovellette, M N
98Lubrano, P
99Lyne, A G
100...
titleGamma-ray emission from the shell of supernova remnant W44 revealed by the Fermi LAT
descriptionRecent observations of supernova remnants (SNRs) hint that they accelerate cosmic rays to energies close to ~10(15) electron volts. However, the nature of the particles that produce the emission remains ambiguous. We report observations of SNR W44 with the Fermi Large Area Telescope at energies between 2 x 10(8) electron volts and 3 x10(11) electron volts. The detection of a source with a morphology corresponding to the SNR shell implies that the emission is produced by particles accelerated there. The gamma-ray spectrum is well modeled with emission from protons and nuclei. Its steepening above approximately 10(9) electron volts provides a probe with which to study how particle acceleration responds to environmental effects such as shock propagation in dense clouds and how accelerated particles are released into interstellar space.
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titleGamma-ray emission from the shell of supernova remnant W44 revealed by the Fermi LAT
authorAbdo, A A ; Ackermann, M ; Ajello, M ; Baldini, L ; Ballet, J ; Barbiellini, G ; Baring, M G ; Bastieri, D ; Baughman, B M ; Bechtol, K ; Bellazzini, R ; Berenji, B ; Blandford, R D ; Bloom, E D ; Bonamente, E ; Borgland, A W ; Bregeon, J ; Brez, A ; Brigida, M ; Bruel, P ; Burnett, T H ; Buson, S ; Caliandro, G A ; Cameron, R A ; Caraveo, P A ; Casandjian, J M ; Cecchi, C ; Celik, O ; Chekhtman, A ; Cheung, C C ; Chiang, J ; Ciprini, S ; Claus, R ; Cognard, I ; Cohen-Tanugi, J ; Cominsky, L R ; Conrad, J ; Cutini, S ; Dermer, C D ; De Angelis, A ; De Palma, F ; Digel, S W ; Do Couto E Silva, E ; Drell, P S ; Dubois, R ; Dumora, D ; Espinoza, C ; Farnier, C ; Favuzzi, C ; Fegan, S J ; Focke, W B ; Fortin, P ; Frailis, M ; Fukazawa, Y ; Funk, S ; Fusco, P ; Gargano, F ; Gasparrini, D ; Gehrels, N ; Germani, S ; Giavitto, G ; Giebels, B ; Giglietto, N ; Giordano, F ; Glanzman, T ; Godfrey, G ; Grenier, I A ; Grondin, M-H ; Grove, J E ; Guillemot, L ; Guiriec, S ; Hanabata, Y ; Harding, A K ; Hayashida, M ; Hays, E ; Hughes, R E ; Jackson, M S ; Jóhannesson, G ; Johnson, A S ; Johnson, T J ; Johnson, W N ; Kamae, T ; Katagiri, H ; Kataoka, J ; Katsuta, J ; Kawai, N ; Kerr, M ; Knödlseder, J ; Kocian, M L ; Kramer, M ; Kuss, M ; Lande, J ; Latronico, L ; Lemoine-Goumard, M ; Longo, F ; Loparco, F ; Lott, B ; Lovellette, M N ; Lubrano, P ; Lyne, A G ; Madejski, G M ; Makeev, A ; Mazziotta, M N ; Mcenery, J E ; Meurer, C ; Michelson, P F ; Mitthumsiri, W ; Mizuno, T ; Monte, C ; Monzani, M E ; Morselli, A ; Moskalenko, I V ; Murgia, S ; Nakamori, T ; Nolan, P L ; Norris, J P ; Noutsos, A ; Nuss, E ; Ohsugi, T ; Omodei, N ; Orlando, E ; Ormes, J F ; Paneque, D ; Parent, D ; Pelassa, V ; Pepe, M ; Pesce-Rollins, M ; Piron, F ; Porter, T A ; Rainò, S ; Rando, R ; Razzano, M ; Reimer, A ; Reimer, O ; Reposeur, T ; Rochester, L S ; Rodriguez, A Y ; Romani, R W ; Roth, M ; Ryde, F ; Sadrozinski, H F-W ; Sanchez, D ; Sander, A ; Saz Parkinson, P M ; Scargle, J D ; Sgrò, C ; Siskind, E J ; Smith, D A ; Smith, P D ; Spandre, G ; Spinelli, P ; Stappers, B W ; Stecker, F W ; Strickman, M S ; Suson, D J ; Tajima, H ; Takahashi, H ; Takahashi, T ; Tanaka, T ; Thayer, J B ; Thayer, J G ; Theureau, G ; Thompson, D J ; Tibaldo, L ; Tibolla, O ; Torres, D F ; Tosti, G ; Tramacere, A ; Uchiyama, Y ; Usher, T L ; Vasileiou, V ; Venter, C ; Vilchez, N ; Vitale, V ; Waite, A P ; Wang, P ; Winer, B L ; Wood, K S ; Yamazaki, R ; Ylinen, T ; Ziegler, M
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6Baring, M G
7Bastieri, D
8Baughman, B M
9Bechtol, K
10Bellazzini, R
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13Bloom, E D
14Bonamente, E
15Borgland, A W
16Bregeon, J
17Brez, A
18Brigida, M
19Bruel, P
20Burnett, T H
21Buson, S
22Caliandro, G A
23Cameron, R A
24Caraveo, P A
25Casandjian, J M
26Cecchi, C
27Celik, O
28Chekhtman, A
29Cheung, C C
30Chiang, J
31Ciprini, S
32Claus, R
33Cognard, I
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35Cominsky, L R
36Conrad, J
37Cutini, S
38Dermer, C D
39De Angelis, A
40De Palma, F
41Digel, S W
42Do Couto E Silva, E
43Drell, P S
44Dubois, R
45Dumora, D
46Espinoza, C
47Farnier, C
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50Focke, W B
51Fortin, P
52Frailis, M
53Fukazawa, Y
54Funk, S
55Fusco, P
56Gargano, F
57Gasparrini, D
58Gehrels, N
59Germani, S
60Giavitto, G
61Giebels, B
62Giglietto, N
63Giordano, F
64Glanzman, T
65Godfrey, G
66Grenier, I A
67Grondin, M-H
68Grove, J E
69Guillemot, L
70Guiriec, S
71Hanabata, Y
72Harding, A K
73Hayashida, M
74Hays, E
75Hughes, R E
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77Jóhannesson, G
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87Knödlseder, J
88Kocian, M L
89Kramer, M
90Kuss, M
91Lande, J
92Latronico, L
93Lemoine-Goumard, M
94Longo, F
95Loparco, F
96Lott, B
97Lovellette, M N
98Lubrano, P
99Lyne, A G
100...
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27Celik
28Chekhtman
29Cheung
30Chiang
31Ciprini
32Claus
33Cognard
34Cohen-Tanugi
35Cominsky
36Conrad
37Cutini
38Dermer
39de Angelis
40de Palma
41Digel
42Do Couto E Silva
43Drell
44Dubois
45Dumora
46Espinoza
47Farnier
48Favuzzi
49Fegan
50Focke
51Fortin
52Frailis
53Fukazawa
54Funk
55Fusco
56Gargano
57Gasparrini
58Gehrels
59Germani
60Giavitto
61Giebels
62Giglietto
63Giordano
64Glanzman
65Godfrey
66Grenier
67Grondin
68Grove
69Guillemot
70Guiriec
71Hanabata
72Harding
73Hayashida
74Hays
75Hughes
76Jackson
77Jóhannesson
78Johnson
79Kamae
80Katagiri
81Kataoka
82Katsuta
83Kawai
84Kerr
85Knödlseder
86Kocian
87Kramer
88Kuss
89Lande
90Latronico
91Lemoine-Goumard
92Longo
93Loparco
94Lott
95Lovellette
96Lubrano
97Lyne
98Madejski
99Makeev
100...
aufirst
0A A
1M
2L
3J
4G
5M G
6D
7B M
8K
9R
10B
11R D
12E D
13E
14A W
15A
16P
17T H
18S
19G A
20R A
21P A
22J M
23C
24O
25C C
26I
27L R
28C D
29F
30S W
31P S
32S J
33W B
34Y
35N
36T
37I A
38M-H
39J E
40A K
41R E
42M S
43A S
44T J
45W N
46H
47M L
48M N
49A G
50G M
51P F
52W
53M E
54I V
55P L
56J P
57J F
58V
59T A
60L S
61A Y
62R W
63H F-W
64P M
65J D
66E J
67D A
68P D
69B W
70F W
71D J
72J B
73J G
74D F
75T L
76A P
77B L
78K S
au
0Abdo, A A
1Ackermann, M
2Ajello, M
3Baldini, L
4Ballet, J
5Barbiellini, G
6Baring, M G
7Bastieri, D
8Baughman, B M
9Bechtol, K
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14Bonamente, E
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21Buson, S
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23Cameron, R A
24Caraveo, P A
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26Cecchi, C
27Celik, O
28Chekhtman, A
29Cheung, C C
30Chiang, J
31Ciprini, S
32Claus, R
33Cognard, I
34Cohen-Tanugi, J
35Cominsky, L R
36Conrad, J
37Cutini, S
38Dermer, C D
39de Angelis, A
40de Palma, F
41Digel, S W
42Do Couto E Silva, E
43Drell, P S
44Dubois, R
45Dumora, D
46Espinoza, C
47Farnier, C
48Favuzzi, C
49Fegan, S J
50Focke, W B
51Fortin, P
52Frailis, M
53Fukazawa, Y
54Funk, S
55Fusco, P
56Gargano, F
57Gasparrini, D
58Gehrels, N
59Germani, S
60Giavitto, G
61Giebels, B
62Giglietto, N
63Giordano, F
64Glanzman, T
65Godfrey, G
66Grenier, I A
67Grondin, M-H
68Grove, J E
69Guillemot, L
70Guiriec, S
71Hanabata, Y
72Harding, A K
73Hayashida, M
74Hays, E
75Hughes, R E
76Jackson, M S
77Jóhannesson, G
78Johnson, A S
79Johnson, T J
80Johnson, W N
81Kamae, T
82Katagiri, H
83Kataoka, J
84Katsuta, J
85Kawai, N
86Kerr, M
87Knödlseder, J
88Kocian, M L
89Kramer, M
90Kuss, M
91Lande, J
92Latronico, L
93Lemoine-Goumard, M
94Longo, F
95Loparco, F
96Lott, B
97Lovellette, M N
98Lubrano, P
99Lyne, A G
100...
atitleGamma-ray emission from the shell of supernova remnant W44 revealed by the Fermi LAT
jtitleScience (New York, N.Y.)
risdate20100226
volume327
issue5969
spage1103
pages1103-1106
eissn1095-9203
formatjournal
genrearticle
ristypeJOUR
abstractRecent observations of supernova remnants (SNRs) hint that they accelerate cosmic rays to energies close to ~10(15) electron volts. However, the nature of the particles that produce the emission remains ambiguous. We report observations of SNR W44 with the Fermi Large Area Telescope at energies between 2 x 10(8) electron volts and 3 x10(11) electron volts. The detection of a source with a morphology corresponding to the SNR shell implies that the emission is produced by particles accelerated there. The gamma-ray spectrum is well modeled with emission from protons and nuclei. Its steepening above approximately 10(9) electron volts provides a probe with which to study how particle acceleration responds to environmental effects such as shock propagation in dense clouds and how accelerated particles are released into interstellar space.
doi10.1126/science.1182787
pmid20056857
orcidid0000-0002-0014-7809: 0000-0001-6885-7156
issn00368075
oafree_for_read
date2010-02-26