The TROY project II. Multi-technique constraints on exotrojans in nine planetary systems

• Type: Article in International Scientific Journal
• Date: 2018

Authors

Lillo Box, J (Author) Other; Leleu, A (Author) Other; Parviainen, H (Author) Other; Figueira, P (Author) Other; Mallonn, M (Author) Other; Correia, ACM (Author) Other; N.C. Santos (Author) FCUP; Robutel, P (Author) Other; Lendl, M (Author) Other; Boffin, HMJ (Author) Other; Faria, JP (Author) Other; Barrado, D (Author) Other; Neal, J (Author) Other

Journal

Title: Astronomy and Astrophysics

Vol. 618

Final page: A42

ISSN: 0004-6361

Publisher: EDP Sciences

Indexing

ISI Web of Knowledge - 18 Citations

Scopus - 22 Citations

Other information

Authenticus ID: P-00P-Q7D

DOI: 10.1051/0004-6361/201833312

Abstract (EN): Context. Co-orbital bodies are the byproduct of planet formation and evolution, as we know from the solar system. Although planet-size co-orbitals do not exists in our planetary system, dynamical studies show that they can remain stable for long periods of time in the gravitational well of massive planets. Should they exist, their detection is feasible with the current instrumentation. Aims. In this paper, we present new ground-based observations searching for these bodies co-orbiting with nine close-in (P < 5 days) planets, using various observing techniques. The combination of all of these techniques allows us to restrict the parameter space of any possible trojan in the system. Methods. We used multi-technique observations, comprised of radial velocity, precision photometry, and transit timing variations, both newly acquired in the context of the EROY project and publicly available, to constrain the presence of planet-size trojans in the Lagrangian points of nine known exoplanets. Results. We find no clear evidence of trojans in these nine systems through any of the techniques used down to the precision of the observations. However, this allows us to constrain the presence of any potential trojan in the system, especially in the trojan mass or radius vs. libration amplitude plane. In particular, we can set upper mass limits in the super-Earth mass regime for six of the studied systems.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 20