55 Cancri (Copernicus): A Multi-Planet System with a Hot Super-Earth and a Jupiter Analogue

Debra A. Fischer
(Submitted on 31 Jul 2018)

The star 55 Cancri was one of the first known exoplanet hosts and each of the planets in this system is remarkable. Planets b and c are in a near 1:3 resonance. Planet d has a 14.5 year orbit, and is one of the longest known orbital periods for a gas giant planet. Planet e has a mass of 8 M? and transits this bright star, providing a unique case for modeling of the interior structure and atmospheric composition of an exoplanet. Planet f resides in the habitable zone of the star. If the planets are approximately co-planar, then by virtue of having one transiting planet, this is a system where the Doppler technique has essentially measured the true mass of the planets, rather than just Msin i. The unfolding history of planet discovery for this system provides a good example of the challenges and importance of understanding the star to understand the planets.

Comments:    13 pages
Subjects:    Earth and Planetary Astrophysics (astro-ph.EP)
Journal reference:    Handbook of Exoplanets, Edited by Hans J. Deeg and Juan Antonio Belmonte. Springer Living Reference Work, ISBN: 978-3-319-30648-3, 2017, id.3
DOI:    10.1007/978-3-319-30648-3
Cite as:    arXiv:1807.11925 [astro-ph.EP] (or arXiv:1807.11925v1 [astro-ph.EP] for this version)
Submission history
From: Debra Fischer [view email]
[v1] Tue, 31 Jul 2018 17:11:50 GMT (4794kb,D)
https://arxiv.org/abs/1807.11925