Very high energy γ ray absorption by the galactic interstellar radiation field (Research Note)

被引：33

作者：

Zhang, JL ^{[1
]}

Bi, XJ ^{[1
]}

Hu, HB ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China

来源：

ASTRONOMY & ASTROPHYSICS | 2006年 / 449卷 / 02期

关键词：

ISM : cosmic rays; infrared : ISM; gamma rays : observations;

D O I：

10.1051/0004-6361:20054422

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Aims. We calculate the attenuation of very high energy gamma rays from Galactic sources. Methods. A recent calculation of the Galactic interstellar radiation field shows that the infra-red radiation background near the Galactic Center is very intense. The attenuation of very high energy gamma rays by this radiation is strong and occurs at lower energies than previously thought. Results. Our result shows that the cutoff of the high energy gamma ray spectrum begins at about 20 TeV and reaches about 10% for 50 TeV gamma rays.

引用

页码：641 / 643

页数：3

共 6 条

[1] A new population of very high energy gamma-ray sources in the Milky Way [J].

Aharonian, F ;

Akhperjanian, AG ;

Aye, KM ;

Bazer-Bachi, AR ;

Beilicke, M ;

Benbow, W ;

Berge, D ;

Berghaus, P ;

Bernlöhr, K ;

Boisson, C ;

Bolz, O ;

Borgmeier, C ;

Braun, I ;

Breitling, F ;

Brown, AM ;

Gordo, JB ;

Chadwick, PM ;

Chounet, LM ;

Cornils, R ;

Costamante, L ;

Degrange, B ;

Djannati-Ata, A ;

Drury, LO ;

Dubus, G ;

Ergin, T ;

Espigat, P ;

Feinstein, F ;

Fteury, P ;

Fontaine, G ;

Funk, S ;

Gallant, YA ;

Giebels, B ;

Gillessen, S ;

Goret, P ;

Hadjichristidis, C ;

Hauser, M ;

Heinzelmann, G ;

Henri, G ;

Hermann, G ;

Hinton, JA ;

Hofmann, W ;

Holleran, M ;

Horns, D ;

de Jager, OC ;

Jung, I ;

Khélifi, B ;

Komin, N ;

Konopelko, A ;

Latham, IJ ;

Le Gallou, R .

SCIENCE, 2005, 307 (5717) :1938-1942

[2] Very high energy gamma rays from the direction of Sagittarius A [J].

Aharonian, F ;

Akhperjanian, AG ;

Aye, KM ;

Bazer-Bachi, AR ;

Beilicke, M ;

Benbow, W ;

Berge, D ;

Berghaus, P ;

Bernlöhr, K ;

Bolz, O ;

Boisson, C ;

Borgmeier, C ;

Breitling, F ;

Brown, AM ;

Gordo, JB ;

Chadwick, PM ;

Chitnis, VR ;

Chounet, LM ;

Cornils, R ;

Costamante, L ;

Degrange, B ;

Djannati-Ataï, A ;

Drury, LO ;

Ergin, T ;

Espigat, P ;

Feinstein, F ;

Fleury, P ;

Fontaine, G ;

Funk, S ;

Gallant, Y ;

Giebels, B ;

Gillessen, S ;

Goret, P ;

Guy, J ;

Hadjichristidis, C ;

Hauser, M ;

Heinzelmann, G ;

Henri, G ;

Hermann, G ;

Hinton, JA ;

Hofmann, W ;

Holleran, M ;

Horns, D ;

de Jager, OC ;

Jung, I ;

Khélifi, B ;

Komin, N ;

Konopelko, A ;

Latham, IJ ;

Le Gallou, R .

ASTRONOMY & ASTROPHYSICS, 2004, 425 (01) :L13-L17

[3] Extrapolation of galactic dust emission at 100 microns to cosmic microwave background radiation frequencies using FIRAS [J].

Finkbeiner, DP ;

Davis, M ;

Schlegel, DJ .

ASTROPHYSICAL JOURNAL, 1999, 524 (02) :867-886

[4]

PORTER TA, 2005, ARXIVASTROPH0507121

[5]

PORTER TA, 2005, ARXIVASTROPH0507119

[6] Diffuse continuum gamma rays from the galaxy [J].

Strong, AW ;

Moskalenko, IV ;

Reimer, O .

ASTROPHYSICAL JOURNAL, 2000, 537 (02) :763-784

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