Subaru/COMICS mid-infrared spectroscopic observations of the dust plume from comet 9P/Tempel

T. Ootsubo; S. Sugita; Jun Watanabe; M. Honda; H. Kawakita; T. Kadono; R. Furusho

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

Subaru/COMICS mid-infrared spectroscopic observations of the dust plume from comet 9P/Tempel

T. Ootsubo, S. Sugita, Jun Watanabe, M. Honda, H. Kawakita, T. Kadono, R. Furusho

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

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 μm; R ∼ 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 μm) 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 μm) 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.

Original language	English
Title of host publication	Deep Impact as a World Observatory Event
Subtitle of host publication	Synergies in Space, Time, and Wavelength: Proceedings of the ESO/VUB Conference
Editors	Hans Ulrich Kaufl, Christiaan Sterken
Pages	131-136
Number of pages	6
DOIs	https://doi.org/10.1007/978-3-540-76959-0_16
Publication status	Published - 2009
Externally published	Yes

Publication series

Name	ESO Astrophysics Symposia
Volume	2009
ISSN (Print)	1431-2433
ISSN (Electronic)	1611-6143

ASJC Scopus subject areas

Astronomy and Astrophysics
Physics and Astronomy (miscellaneous)

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

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Ootsubo, T., Sugita, S., Watanabe, J., Honda, M., Kawakita, H., Kadono, T., & Furusho, R. (2009). Subaru/COMICS mid-infrared spectroscopic observations of the dust plume from comet 9P/Tempel. In H. U. Kaufl, & C. Sterken (Eds.), Deep Impact as a World Observatory Event: Synergies in Space, Time, and Wavelength: Proceedings of the ESO/VUB Conference (pp. 131-136). (ESO Astrophysics Symposia; Vol. 2009). https://doi.org/10.1007/978-3-540-76959-0_16

Subaru/COMICS mid-infrared spectroscopic observations of the dust plume from comet 9P/Tempel. / Ootsubo, T.; Sugita, S.; Watanabe, Jun et al.

Deep Impact as a World Observatory Event: Synergies in Space, Time, and Wavelength: Proceedings of the ESO/VUB Conference. ed. / Hans Ulrich Kaufl; Christiaan Sterken. 2009. p. 131-136 (ESO Astrophysics Symposia; Vol. 2009).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Ootsubo, T, Sugita, S, Watanabe, J, Honda, M, Kawakita, H, Kadono, T & Furusho, R 2009, Subaru/COMICS mid-infrared spectroscopic observations of the dust plume from comet 9P/Tempel. in HU Kaufl & C Sterken (eds), Deep Impact as a World Observatory Event: Synergies in Space, Time, and Wavelength: Proceedings of the ESO/VUB Conference. ESO Astrophysics Symposia, vol. 2009, pp. 131-136. https://doi.org/10.1007/978-3-540-76959-0_16

Ootsubo T, Sugita S, Watanabe J, Honda M, Kawakita H, Kadono T et al. Subaru/COMICS mid-infrared spectroscopic observations of the dust plume from comet 9P/Tempel. In Kaufl HU, Sterken C, editors, Deep Impact as a World Observatory Event: Synergies in Space, Time, and Wavelength: Proceedings of the ESO/VUB Conference. 2009. p. 131-136. (ESO Astrophysics Symposia). doi: 10.1007/978-3-540-76959-0_16

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title = "Subaru/COMICS mid-infrared spectroscopic observations of the dust plume from comet 9P/Tempel",

abstract = "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 μm; R ∼ 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 μm) 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 μm) 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.",

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AU - Sugita, S.

AU - Watanabe, Jun

AU - Honda, M.

AU - Kawakita, H.

AU - Kadono, T.

AU - Furusho, R.

PY - 2009

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N2 - 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 μm; R ∼ 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 μm) 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 μm) 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.

AB - 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 μm; R ∼ 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 μm) 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 μm) 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.

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Subaru/COMICS mid-infrared spectroscopic observations of the dust plume from comet 9P/Tempel

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