HOT DEBRIS DUST AROUND HD 106797

Fujiwara, Hideaki; Onaka, Takashi; Yamashita, Takuya; Ishihara, Daisuke; Kataza, Hirokazu; Ootsubo, Takafumi; Murakami, Hiroshi; Nakagawa, Takao; Hirao, Takanori; Enya, Keigo; Fukagawa, Misato; Marshall, Jonathan P

doi:10.1088/0004-637X/695/1/L88; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)

Title: HOT DEBRIS DUST AROUND HD 106797

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Abstract

Photometry of the A0 V main-sequence star HD 106797 with AKARI and Gemini/T-ReCS is used to detect excess emission over the expected stellar photospheric emission between 10 and 20 {mu}m, which is best attributed to hot circumstellar debris dust surrounding the star. The temperature of the debris dust is derived as T {sub d} {approx} 190 K by assuming that the excess emission is approximated by a single temperature blackbody. The derived temperature suggests that the inner radius of the debris disk is {approx}14 AU. The fractional luminosity of the debris disk is 1000 times brighter than that of our own zodiacal cloud. The existence of such a large amount of hot dust around HD 106797 cannot be accounted for by a simple model of the steady state evolution of a debris disk due to collisions, and it is likely that transient events play a significant role. Our data also show a narrow spectral feature between 11 and 12 {mu}m attributable to crystalline silicates, suggesting that dust heating has occurred during the formation and evolution of the debris disk of HD 106797.

Authors:

Fujiwara, Hideaki; Onaka, Takashi ^[1]; Yamashita, Takuya ^[2]; Ishihara, Daisuke; Kataza, Hirokazu; Ootsubo, Takafumi; Murakami, Hiroshi; Nakagawa, Takao; Hirao, Takanori; Enya, Keigo ^[3]; Fukagawa, Misato ^[4]; Marshall, Jonathan P

Department of Astronomy, School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033 (Japan)
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-0015 (Japan)
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510 (Japan)
Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka 560-0043, Osaka (Japan)

Publication Date:: Fri Apr 10 00:00:00 EDT 2009

OSTI Identifier:: 21296281

Resource Type:: Journal Article

Journal Name:: Astrophysical Journal (Online)

Additional Journal Information:: Journal Volume: 695; Journal Issue: 1; Other Information: DOI: 10.1088/0004-637X/695/1/L88; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1538-4357

Country of Publication:: United States

Language:: English

Subject:: 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; DUSTS; LUMINOSITY; MAIN SEQUENCE STARS; PHOTOMETRY; SILICATES; STAR EVOLUTION; STEADY-STATE CONDITIONS

Citation Formats


                    Fujiwara, Hideaki, Onaka, Takashi, Yamashita, Takuya, Ishihara, Daisuke, Kataza, Hirokazu, Ootsubo, Takafumi, Murakami, Hiroshi, Nakagawa, Takao, Hirao, Takanori, Enya, Keigo, Fukagawa, Misato, Marshall, Jonathan P, and White, Glenn J. HOT DEBRIS DUST AROUND HD 106797.  United States: N. p., 2009. 
        Web.  doi:10.1088/0004-637X/695/1/L88; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).

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                    Fujiwara, Hideaki, Onaka, Takashi, Yamashita, Takuya, Ishihara, Daisuke, Kataza, Hirokazu, Ootsubo, Takafumi, Murakami, Hiroshi, Nakagawa, Takao, Hirao, Takanori, Enya, Keigo, Fukagawa, Misato, Marshall, Jonathan P, & White, Glenn J. HOT DEBRIS DUST AROUND HD 106797.  United States.  https://doi.org/10.1088/0004-637X/695/1/L88; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)

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                    Fujiwara, Hideaki, Onaka, Takashi, Yamashita, Takuya, Ishihara, Daisuke, Kataza, Hirokazu, Ootsubo, Takafumi, Murakami, Hiroshi, Nakagawa, Takao, Hirao, Takanori, Enya, Keigo, Fukagawa, Misato, Marshall, Jonathan P, and White, Glenn J. 2009.  
        "HOT DEBRIS DUST AROUND HD 106797".  United States.  https://doi.org/10.1088/0004-637X/695/1/L88; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).

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@article{osti_21296281,

  title        = {HOT DEBRIS DUST AROUND HD 106797},

  author       = {Fujiwara, Hideaki and Onaka, Takashi and Yamashita, Takuya and Ishihara, Daisuke and Kataza, Hirokazu and Ootsubo, Takafumi and Murakami, Hiroshi and Nakagawa, Takao and Hirao, Takanori and Enya, Keigo and Fukagawa, Misato and Marshall, Jonathan P and White, Glenn J.},

  abstractNote = {Photometry of the A0 V main-sequence star HD 106797 with AKARI and Gemini/T-ReCS is used to detect excess emission over the expected stellar photospheric emission between 10 and 20 {mu}m, which is best attributed to hot circumstellar debris dust surrounding the star. The temperature of the debris dust is derived as T {sub d} {approx} 190 K by assuming that the excess emission is approximated by a single temperature blackbody. The derived temperature suggests that the inner radius of the debris disk is {approx}14 AU. The fractional luminosity of the debris disk is 1000 times brighter than that of our own zodiacal cloud. The existence of such a large amount of hot dust around HD 106797 cannot be accounted for by a simple model of the steady state evolution of a debris disk due to collisions, and it is likely that transient events play a significant role. Our data also show a narrow spectral feature between 11 and 12 {mu}m attributable to crystalline silicates, suggesting that dust heating has occurred during the formation and evolution of the debris disk of HD 106797.},

  doi          = {10.1088/0004-637X/695/1/L88; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)},

  url          = {https://www.osti.gov/biblio/21296281},
  journal      = {Astrophysical Journal (Online)},

  issn         = {1538-4357},

  number       = 1,

  volume       = 695,

  place        = {United States},

  year         = {Fri Apr 10 00:00:00 EDT 2009},

  month        = {Fri Apr 10 00:00:00 EDT 2009}

}

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https://doi.org/10.1088/0004-637X/695/1/L88; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)

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