1. A multiple planet system of super-Earths orbiting the brightest red dwarf star GJ887
- Author
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Jeffers, S. V., Dreizler, S., Barnes, J. R., Haswell, C. A., Nelson, R. P., Rodríguez, E., Lopez-Gonzalez, M. J., Morales, N., Luque, R., Zechmeister, M., Vogt, S. S., Jenkins, J. S., Palle, E., Berdinas, Z. M., Coleman, G. A. L., Diaz, M. R., Ribas, I., Jones, H. R. A., Butler, R. P., Tinney, C. G., Bailey, J., Carter, B. D., O'Toole, S., Wittenmyer, R. A., Crane, J. D., Feng, F., Shectman, S. A., Teske, J., Reiners, A., Amado, P. J., and Anglada-Escude, G.
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Astrophysics - Earth and Planetary Astrophysics - Abstract
The nearest exoplanets to the Sun are our best possibilities for detailed characterization. We report the discovery of a compact multi-planet system of super-Earths orbiting the nearby red dwarf GJ 887, using radial velocity measurements. The planets have orbital periods of 9.3 and 21.8~days. Assuming an Earth-like albedo, the equilibrium temperature of the 21.8 day planet is approx 350 K; which is interior, but close to the inner edge, of the liquid-water habitable zone. We also detect a further unconfirmed signal with a period of 50 days which could correspond to a third super-Earth in a more temperate orbit. GJ 887 is an unusually magnetically quiet red dwarf with a photometric variability below 500 parts-per-million, making its planets amenable to phase-resolved photometric characterization., Comment: Published by Science
- Published
- 2020
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