Bibcode
Lillo-Box, J.; Leleu, A.; Parviainen, H.; Figueira, P.; Mallonn, M.; Correia, A. C. M.; Santos, N. C.; Robutel, P.; Lendl, M.; Boffin, H. M. J.; Faria, J. P.; Barrado, D.; Neal, J.
Bibliographical reference
Astronomy and Astrophysics, Volume 618, id.A42, 20 pp.
Advertised on:
10
2018
Journal
Citations
22
Refereed citations
22
Description
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 TROY 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.
Based on observations collected at the Centro Astronómico Hispano
Alemán (CAHA) at Calar Alto, operated jointly by the Max-Planck
Institut für Astronomie and the Instituto de Astrofísica de
Andalucía (CSIC).Partly based on data obtained with the STELLA
robotic telescopes in Tenerife, an AIP facility jointly operated by AIP
and IAC.Based on observations collected at the European Organisation for
Astronomical Research in the Southern Hemisphere under ESO programs
297.C-5051, 098.C-0440(A), and 298.C-5009