The HD 95086 planetary system: from discovery to structure

Ágnes Kóspál, Attila Moór, Julien Rameau, Péter Ábrahám, Zoltán Balog, Mickaël 
Bonnefoy, Gael Chauvin, Thomas Henning, Attila Juhász, Anne-Marie Lagrange, 
Johan Olofsson, Sascha Quanz, Zsolt Regály, Mark Wyatt

Before 2013, only three systems had been known where outer planets and debris 
disks co-exist: the ~20-Myr-old beta Pic, the 30-Myr-old HR 8799, and the 440-
Myr-old Fomalhaut. The latter two are wide separation planetary systems with 
giant planets significantly beyond Jupiter's orbit. Recently, analysing direct 
images in the L' band, members of our group have discovered a planet around HD 
95086, a 17-Myr-old A8-type star belonging to the Lower Centaurus Lupus 
association. The planet of HD 95086 has a mass of 5 M_Jup, and a projected 
separation of 56 AU. The system also harbors a bright debris disk. We performed 
a detailed study of the debris disk using the spectral energy distribution and 
spatially resolved far-infrared images obtained with the Herschel Space 
Telescope, and found two distinct dust disk components with characteristic 
temperatures of 187 K and 57 K. The outer component is very extended (r_out 
~270 AU), while the minimum inner radius of the outer component, estimated from 
a simple assumption of black-body grains, is ~64 AU. The mass in mm-size dust 
is 0.5 M_Earth and in the planetesimals is even more, making HD 95086 one of 
the most massive known debris disks.  The good agreement between the planet's 
position and the characteristic radius of the outer dust belt makes HD 95086 
the best target to investigate planet-disk interaction. We also present our 
simulations of the disk's morphology using different planet-disk interaction 
scenarios.