Gamma-Ray Albedo of Small Solar System Bodies.
(05/04/2013)
The authors calculate the (gamma)-ray albedo flux from cosmic-ray (CR) interactions with the solid rock and ice in Main Belt asteroids and Kuiper Belt objects (KBOs) using the Moon as a template. We show that the (gamma)-ray albedo for the Main Belt and KBOs strongly depends on the small-body mass spectrum of each system and may be detectable by the forthcoming Gamma Ray Large Area Space Telescope (GLAST). If detected, it can be used to derive the mass spectrum of small bodies in the Main Belt and Kuiper Belt and to probe the spectrum of CR nuclei at close-to-interstellar conditions....
Tác giả: Moskalenko, I. V. |
Số trang: 2 |
Lĩnh vực: Vật lý |
Năm XB: 2008 |
Loại tài liệu: Khác
Tài liệu cần xác thực trước khi tải
Tiêu đề | Tải về |
Gamma-Ray Albedo of Small Solar System Bodies. | Số trang: 2
| Loại file:
The authors calculate the (gamma)-ray albedo flux from cosmic-ray (CR) interactions with the solid rock and ice in Main Belt asteroids and Kuiper Belt objects (KBOs) using the Moon as a template. We show that the (gamma)-ray albedo for the Main Belt and KBOs strongly depends on the small-body mass spectrum of each system and may be detectable by the forthcoming Gamma Ray Large Area Space Telescope (GLAST). If detected, it can be used to derive the mass spectrum of small bodies in the Main Belt and Kuiper Belt and to probe the spectrum of CR nuclei at close-to-interstellar conditions. The orbits of the Main Belt asteroids and KBOs are distributed near the ecliptic, which passes through the Galactic center and high Galactic latitudes. Therefore, the (gamma)-ray emission by the Main Belt and Kuiper Belt has to be taken into account when analyzing weak (gamma)-ray sources close to the ecliptic. The asteroid albedo spectrum also exhibits a 511 keV line due to secondary positrons annihilating in the rock. This may be an important and previously unrecognized celestial foreground for the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) observations of the Galactic 511 keV line emission including the direction of the Galactic center.
|
miễn phí
|
© Copyright 2012 Trung tâm Thông tin Khoa học và Công nghệ - Sở Khoa học & Công nghệ TP. Cần Thơ
Địa chỉ: 118/3 Trần Phú - P.Cái Khế - Q.Ninh Kiều - TPCT
Điện thoại: 0292 3824031 Fax: 0292 3812352
|
|
Lượt truy cập:
(Website trong thời gian thử nghiệm)