OBSERVATIONAL CONSTRAINTS ON COMPANIONS INSIDE OF 10 AU IN THE HR 8799 PLANETARY SYSTEM
- 1. Department of Astronomy, California Institute of Technology, 1200 East California Boulevard, MC 249-17, Pasadena, CA 91125 (United States)
- 2. Sydney Institute for Astronomy (SIfA), School of Physics, Sydney University, NSW 2006 (Australia)
- 3. Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States)
Description
We report the results of Keck L'-band non-redundant aperture masking of HR 8799, a system with four confirmed planetary mass companions at projected orbital separations of 14-68 AU. We use these observations to place constraints on the presence of planets and brown dwarfs at projected orbital separations inside of 10 AU-separations out of reach to more conventional direct imaging methods. No companions were detected at better than 99% confidence between orbital separations of 0.8 and 10 AU. Assuming an age of 30 Myr and adopting the Baraffe models, we place upper limits to planetary mass companions of 80, 60, and 11 MJup at projected orbital separations of 0.8, 1, and 3-10 AU, respectively. Our constraints on massive companions to HR 8799 will help clarify ongoing studies of the orbital stability of this multi-planet system, and may illuminate future work dedicated to understanding the dust-free hole interior to ∼6 AU.
Availability note (English)
Available from http://dx.doi.org/10.1088/2041-8205/730/2/L21Additional details
Identifiers
Publishing Information
- Journal Title
- Astrophysical Journal Letters
- Journal Volume
- 730
- Journal Issue
- 2
- Journal Page Range
- [5 p.]
- ISSN
- 2041-8205
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 43037963
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- DETECTION; MASS; PLANETS