skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: THE ABSENCE OF COLD DUST AROUND WARM DEBRIS DISK STAR HD 15407A

Abstract

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 ({approx}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 ({approx}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.

Authors:
 [1];  [2]; ; ;  [3];  [4];  [5];  [6]
  1. Subaru Telescope, National Astronomical Observatory of Japan, 650 North A'ohoku Pl., Hilo, HI 96720 (United States)
  2. Department of Astronomy, School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033 (Japan)
  3. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210 (Japan)
  4. National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-0015 (Japan)
  5. Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043 (Japan)
  6. Department of Physics, School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602 (Japan)
Publication Date:
OSTI Identifier:
22078458
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 759; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2041-8205
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMIC DUST; EMISSION; FAR INFRARED RADIATION; FLUX DENSITY; PHOTOMETRY; SPECTROSCOPY; STARS; WAVELENGTHS

Citation Formats

Fujiwara, Hideaki, Onaka, Takashi, Takita, Satoshi, Kataza, Hirokazu, Murakami, Hiroshi, Yamashita, Takuya, Fukagawa, Misato, and Ishihara, Daisuke, E-mail: hideaki@naoj.org. THE ABSENCE OF COLD DUST AROUND WARM DEBRIS DISK STAR HD 15407A. United States: N. p., 2012. Web. doi:10.1088/2041-8205/759/1/L18.
Fujiwara, Hideaki, Onaka, Takashi, Takita, Satoshi, Kataza, Hirokazu, Murakami, Hiroshi, Yamashita, Takuya, Fukagawa, Misato, & Ishihara, Daisuke, E-mail: hideaki@naoj.org. THE ABSENCE OF COLD DUST AROUND WARM DEBRIS DISK STAR HD 15407A. United States. doi:10.1088/2041-8205/759/1/L18.
Fujiwara, Hideaki, Onaka, Takashi, Takita, Satoshi, Kataza, Hirokazu, Murakami, Hiroshi, Yamashita, Takuya, Fukagawa, Misato, and Ishihara, Daisuke, E-mail: hideaki@naoj.org. Thu . "THE ABSENCE OF COLD DUST AROUND WARM DEBRIS DISK STAR HD 15407A". United States. doi:10.1088/2041-8205/759/1/L18.
@article{osti_22078458,
title = {THE ABSENCE OF COLD DUST AROUND WARM DEBRIS DISK STAR HD 15407A},
author = {Fujiwara, Hideaki and Onaka, Takashi and Takita, Satoshi and Kataza, Hirokazu and Murakami, Hiroshi and Yamashita, Takuya and Fukagawa, Misato and Ishihara, Daisuke, E-mail: hideaki@naoj.org},
abstractNote = {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 ({approx}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 ({approx}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.},
doi = {10.1088/2041-8205/759/1/L18},
journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 1,
volume = 759,
place = {United States},
year = {2012},
month = {11}
}