Mid‐Infrared Images of the Circumstellar Dust around α Scorpii

2001/02/20 by K. A. Marsh, E. E. Bloemhof, D. W. Koerner +1 · 6 citations
Physics and Astronomy · #Astrophysics and Star Formation Studies #Stellar, planetary, and galactic studies #Astrophysical Phenomena and Observations

paper · pdf · doi:10.1086/319035

openalex publication_date 2001/02/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31

Abstract

We present the first two-dimensional mid-infrared images of the circumstellar dust distribution around the supergiant star α Scorpii. Our observations were made at wavelengths of 12.5 and 20.8 μm using the MIRLIN focal-plane array camera on the Keck II 10 m telescope, with spatial resolution (λ/ D ) of 0 29 and 0 48 at the two wavelengths, respectively. Our deconvolved images, which provide a resolution enhancement of approximately a factor of 2, show that the dust shell previously detected in one-dimensional scans is actually highly nonuniform. Specifically, the shell is now seen to be concentrated largely into three discrete clumps, and there is evidence of a more recent ejection which has left a central concentration of dust within about 0 3 from the star.

Citations

• An iterative technique for the rectification of observed distributions
• Bayesian-Based Iterative Method of Image Restoration*

Cited by

• High spectral resolution imaging of the dynamical atmosphere of the red supergiant Antares in the CO first overtone lines with VLTI/AMBER
• Imaging the outward motions of clumpy dust clouds around the red supergiant Antares with VLT/VISIR
• The inner circumstellar dust of the red supergiant Antares as seen with VLT/SPHERE/ZIMPOL
• Multi-component absorption lines in theHSTspectra of α Scorpii B
• The Antares emission nebula and mass loss of \sf α Scorpii A
• Antares [wikipedia]