TY  - JOUR
AU  - A.-M. Lagrange, Nadège Meunier
PY  - 2019//
TI  - Evidence for an additional planet in the β Pictoris system
N2  - With its imaged debris disk of dust, its evaporating exocomets, and an imaged giant planet, the young (~23 Myr) β Pictoris system is a unique proxy for detailed studies of planet formation processes as well as planet–disk interactions. Here, we study ten years of European Southern Observatory/High Accuracy Radial Velocity Planet Searcher (HARPS) high-resolution spectroscopic data of β Pictoris. After removing the radial velocity (RV) signals arising from the δ Scuti pulsations of the star, a ~1,200-d periodic signal remains, which, within our current knowledge, we can only attribute to a second planet in the system. The β Pic c mass is about nine times the mass of Jupiter; it orbits at ~2.7 au on an eccentric (e ~ 0.24) orbit. More RV data are needed to obtain more precise estimates of the properties of β Pic c. The current modelling of the planet’s properties and the dynamic of the whole system has to be reinvestigated in light of this detection.
SN  - 2397-3366
UR  - http://dx.doi.org/10.1038/s41550-019-0857-1
N1  - exported from refbase (http://publi.ipev.fr/polar_references/show.php?record=7702), last updated on Mon, 01 Jul 2024 16:52:14 +0200
ID  - A.-M.Lagrange2019
ER  -