Subaru/COMICS Mid-Infrared Spectroscopic Observations of the Dust Plume from Comet 9P/Tempel

被引：0

作者：

Ootsubo, T. ^{[1
]}

Sugita, S. ^{[2
]}

Watanabe, J. ^{[3
]}

Honda, M. ^{[4
]}

Kawakita, H. ^{[5
]}

Kadono, T. ^{[6
]}

Furusho, R. ^{[7
]}

机构：

[1] Nagoya Univ, Grad Sch Sci, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648602, Japan

[2] Univ Tokyo, Dept Complex Sci & Engn, Kashiwa, Chiba 2778561, Japan

[3] Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan

[4] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan

[5] Kyoto Sangyo Univ, Dept Phys, Kita Ku, Kyoto 6038555, Japan

[6] Japan Agcy Marine Earth Sci & Technol, Ctr Deep Earth Explorat, Yokohama, Kanagawa 2360001, Japan

[7] Waseda Univ, Tokyo 1698050, Japan

来源：

DEEP IMPACT AS A WORLD OBSERVATORY EVENT: SYNERGIES IN SPACE, TIME, AND WAVELENGTH | 2009年

关键词：

DEEP IMPACT; SUBARU-TELESCOPE; KUIPER-BELT; COMICS; SPECTROMETER; CAMERA;

D O I：

10.1007/978-3-540-76959-0_16

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We carried out; mid-infrared observations of the Deep Impact (DI) collision with a Jupiter-family (JF) comet, 9P/Tempel, using the Cooled Mid-Infrared Camera and Spectrometer (COMICS) on the 8.2 m Subaru Telescope. The N-band spectrum (8-13 mu m; R similar to 250) of the dust ejecta from the comet nucleus 3.5 hours after the DI event shows a strong crystalline silicate feature. The Subaru/COMICS observation also reveals that small (< 1 mu m) amorphous pyroxene and carbon-rich grains flew away in the forefront of the ejecta, plume before our spectroscopic observation, leaving behind relatively large submicron (0.8-1 mu m) crystalline particles that we subsequently observed. The submicron grains within the subsurface layer of comet 9P/Tempel's nucleus have a higher crystalline-to-amorphous silicate ratio than that in the comae of other JF comets, and even that of Oort cloud comets. Near the comet nucleus 3.5 hours after the impact the crystalline-to-amorphous ratio is similar to that of Hale-Bopp coma, dust at 0,97 AU.

引用

页码：131 / +

页数：2

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