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A low-mass planet candidate orbiting Proxima Centauri at a distance of 1.5 AU

Butler, R. Paul; Jenkins, James S.; Anglada-Escudé, Guillem +18 more

Our nearest neighbor, Proxima Centauri, hosts a temperate terrestrial planet. We detected in radial velocities evidence of a possible second planet with minimum mass m_c sin i_c = 5.8 ± 1.9 M_⊕ and orbital period P_c = 5.21^+0.26_-0.22 years. The analysis of photometric data and spectrosc…