Multi-epoch observations of HD 69830: high-resolution spectroscopy and limits to variability
Article
Article Title | Multi-epoch observations of HD 69830: high-resolution spectroscopy and limits to variability |
---|---|
ERA Journal ID | 1057 |
Article Category | Article |
Authors | Beichman, C. A. (Author), Lisse, C. M. (Author), Tanner, A. M. (Author), Bryden, G. (Author), Akeson, R. L. (Author), Ciardi, D. R. (Author), Boden, A. F. (Author), Dodson-Robinson, S. E. (Author), Salyk, C. (Author) and Wyatt, M. C. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 743 (1), pp. 85-100 |
Article Number | 85 |
Number of Pages | 16 |
Year | 2011 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0004-637X/743/1/85 |
Web Address (URL) | http://iopscience.iop.org/article/10.1088/0004-637X/743/1/85 |
Abstract | The main-sequence solar-type star HD 69830 has an unusually large amount of dusty debris orbiting close to three planets found via the radial velocity technique. In order to explore the dynamical interaction between the dust and planets, we have performed multi-epoch photometry and spectroscopy of the system over several orbits of the outer dust. We find no evidence for changes in either the dust amount or its composition, with upper limits of 5%-7% (1σ per spectral element) on the variability of the dust spectrum over 1year, 3.3% (1σ) on the broadband disk emission over 4years, and 33% (1σ) on the broadband disk emission over 24years. Detailed modeling of the spectrum of the emitting dust indicates that the dust is located outside of the orbits of the three planets and has a composition similar to main-belt, C-type asteroids in our solar system. Additionally, we find no evidence for a wide variety of gas species associated with the dust. Our new higher signal-to-noise spectra do not confirm our previously claimed detection of H2O ice leading to a firm conclusion that the debris can be associated with the break-up of one or more C-type asteroids formed in the dry, inner regions of the protoplanetary disk of the HD 69830 system. The modeling of the spectral energy distribution and high spatial resolution observations in the mid-infrared are consistent with a ∼1AU location for the emitting material. |
Keywords | infrared: planetary systems; Kuiper belt: general; planet-disk interactions; planets and satellites: dynamical evolution and stability; individual stars (HD 69830); zodiacal dust; |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
519999. Other physical sciences not elsewhere classified | |
Public Notes | For access to this article, please click on the URL link provided. |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | California Institute of Technology (Caltech), United States |
Johns Hopkins University, United States | |
Mississippi State University, United States | |
National Aeronautics and Space Administration (NASA), United States | |
University of Texas at Austin, United States | |
University of Cambridge, United Kingdom |
https://research.usq.edu.au/item/q432y/multi-epoch-observations-of-hd-69830-high-resolution-spectroscopy-and-limits-to-variability
1201
total views74
total downloads4
views this month0
downloads this month