Mid-infrared images of the debris disk around HD 141569

K. A. Marsh, M. D. Silverstone, E. E. Becklin, David 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

    Fingerprint

Keywords

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

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

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