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29 March 2024 |
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Article overview
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A Distance-Limited Imaging Survey of Sub-Stellar Companions to Solar Neighborhood Stars | Joseph C. Carson
; Kyle D. Hiner
; Gregorio G. Villar III
; Michael G. Blaschak
; Alexander L. Rudolph
; Karl R. Stapelfeldt
; | Date: |
9 Oct 2008 | Abstract: | We report techniques and results of a Palomar 200-inch (5 m) adaptive optics
imaging survey of sub-stellar companions to solar-type stars. The survey
consists of Ks coronagraphic observations of 21 FGK dwarfs out to 20 pc (median
distance about 17 pc). At 1-arcsec separation (17 projected AU) from a typical
target system, the survey achieves median sensitivities 7 mag fainter than the
parent star. In terms of companion mass, that corresponds to sensitivities of
50MJ (1 Gyr), 70MJ (solar age), and 75MJ (10 Gyr), using the evolutionary
models of Baraffe and colleagues. Using common proper motion to distinguish
companions from field stars, we find that no system shows positive evidence of
a previously unknown substellar companion (searchable separation about 20-250
projected AU at the median target distance). | Source: | arXiv, 0810.1723 | Services: | Forum | Review | PDF | Favorites |
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