TY - JOUR
T1 - Observational constraints on companions inside of 10 AU in the HR 8799 planetary system
AU - Hinkley, Sasha
AU - Carpenter, John M.
AU - Ireland, Michael J.
AU - Kraus, Adam L.
PY - 2011/4/1
Y1 - 2011/4/1
N2 - 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 M Jup 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.
AB - 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 M Jup 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.
KW - instrumentation: adaptive optics
KW - instrumentation: interferometers
KW - planets and satellites: detection
KW - stars: individual (HR 8799)
KW - techniques: high angular resolution
UR - http://www.scopus.com/inward/record.url?scp=79953671484&partnerID=8YFLogxK
U2 - 10.1088/2041-8205/730/2/L21
DO - 10.1088/2041-8205/730/2/L21
M3 - Article
SN - 2041-8205
VL - 730
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 2 PART II
M1 - L21
ER -