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25 April 2024 |
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Article overview
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The nearby, young, isolated, dusty star HD 166191 | | Adam Schneider
; Inseok Song
; Carl Melis
; Ben Zuckerman
; Mike Bessell
; Tara Hufford
; Sasha Hinkley
; | | Date: |
2 Aug 2013 | | Abstract: | We report an in-depth study of the F8-type star HD 166191, identified in an
ongoing survey for stars exhibiting infrared emission above their expected
photospheres in the Wide-field Infrared Survey Explorer all-sky catalog. The
fractional IR luminosity measured from 3.5 to 70 $mu$m is exceptionally high
(L$_{IR}$/L$_{bol}$ $sim$10%). Near-diffraction limited imaging observations
with the T-ReCS Si filter set on the Gemini South telescope and adaptive optics
imaging with the NIRC2 Lp filter on the Keck II telescope confirmed that the
excess emission coincides with the star. Si-band images show a strong
solid-state emission feature at $sim$10 $mu$m. Theoretical evolutionary
isochrones and optical spectroscopic observations indicate a stellar age in the
range 10-100 Myr. The large dust mass seen in HD 166191’s terrestrial planet
zone is indicative of a recent collision between planetary embryos or massive
ongoing collisional grinding associated with planet building. | | Source: | arXiv, 1308.0405 | | Services: | Forum | Review | PDF | Favorites | |
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