Mid-infrared images of the debris disk around HD 141569

K. A. Marsh, M. D. Silverstone, E. E. Becklin, D. W. Koerner, M. W. Werner, A. J. Weinberger, M. E. Ressler

Research output: Contribution to journalArticle

42 Scopus citations

Abstract

We have imaged the circumstellar debris disk around the A0 Ve/B9.5 Ve star HD 141569 (D = 99 pc), at λ = 12.5, 17.9, and 20.8 μm using the Keck II telescope, and confirm the general morphology from other recently published mid-infrared observations. Model fits to an assumed flat radially symmetric dust disk yield an inclination i = 53° ± 5° and a position angle of -6° ± 4° for the tilt axis and indicate the presence of a depression in optical depth by a factor of about 4 within a radial distance of 30 AU (0″.3) from the star. Such a depression is suggestive of a density depletion and is consistent with published spectral energy distributions that indicate the absence of a near-infrared excess even though a mid-infrared excess is present. Our mid-infrared results, in conjunction with previously published near-infrared scattering images, suggest that the two wavelength regimes are viewing, respectively, the inner and outer parts of a common disk structure, which is dominated by small (probably submicron) grains throughout.

Original languageEnglish (US)
Pages (from-to)425-430
Number of pages6
JournalAstrophysical Journal
Volume573
Issue number1 I
DOIs
StatePublished - Jul 1 2002
Externally publishedYes

Keywords

  • Circumstellar matter
  • Infrared: stars
  • Planetary systems
  • Stars: individual (HD 141569)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Marsh, K. A., Silverstone, M. D., Becklin, E. E., Koerner, D. W., Werner, M. W., Weinberger, A. J., & Ressler, M. E. (2002). Mid-infrared images of the debris disk around HD 141569. Astrophysical Journal, 573(1 I), 425-430. https://doi.org/10.1086/340488