2012年11月
THE ABSENCE OF COLD DUST AROUND WARM DEBRIS DISK STAR HD 15407A
ASTROPHYSICAL JOURNAL LETTERS
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- 巻
- 759
- 号
- 1
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1088/2041-8205/759/1/L18
- 出版者・発行元
- IOP PUBLISHING LTD
We report Herschel and AKARI photometric observations at far-infrared (FIR) wavelengths of the debris disk around the F3V star HD 15407A, in which the presence of an extremely large amount of warm dust (similar to 500-600 K) has been suggested by mid-infrared (MIR) photometry and spectroscopy. The observed flux densities of the debris disk at 60-160 mu m are clearly above the photospheric level of the star, suggesting excess emission at FIR as well as at MIR wavelengths previously reported. The observed FIR excess emission is consistent with the continuum level extrapolated from the MIR excess, suggesting that it originates in the inner warm debris dust and cold dust (similar to 50-130 K) is absent in the outer region of the disk. The absence of cold dust does not support a late-heavy-bombardment-like event as the origin of the large amount of warm debris dust around HD 15047A.
- リンク情報
- ID情報
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- DOI : 10.1088/2041-8205/759/1/L18
- ISSN : 2041-8205
- eISSN : 2041-8213
- Web of Science ID : WOS:000310458900018