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

@article{Damasso2020ALP,
  title={A low-mass planet candidate orbiting Proxima Centauri at a distance of 1.5 AU},
  author={Mario Damasso and Fabio Del Sordo and Guillem Anglada-Escud{\'e} and Paolo Giacobbe and Alessandro Sozzetti and Alessandro Morbidelli and Grzegorz Pojmański and Domenico Barbato and R. Paul Butler and Hugh R. A. Jones and Franz-josef Hambsch and James S. Jenkins and Mar{\'i}a Jos{\'e} L{\'o}pez-Gonz{\'a}lez and Nicol{\'a}s Morales and Pablo A. Pe{\~n}a Rojas and Cristina Rodr{\'i}guez-L{\'o}pez and Eloy Rodr{\'i}guez and Pedro J. Amado and Guillem Anglada and Fabo Feng and Jos{\'e} F. G{\'o}mez},
  journal={Science Advances},
  year={2020},
  volume={6}
}
Proxima could host a planet on a ∼5-year orbit, which Gaia can confirm in the near future providing its exact mass. Our nearest neighbor, Proxima Centauri, hosts a temperate terrestrial planet. We detected in radial velocities evidence of a possible second planet with minimum mass mc sin ic = 5.8 ± 1.9M⊕ and orbital period Pc=5.21−0.22+0.26 years. The analysis of photometric data and spectro-scopic activity diagnostics does not explain the signal in terms of a stellar activity cycle, but follow… 
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References

SHOWING 1-10 OF 71 REFERENCES
A terrestrial planet candidate in a temperate orbit around Proxima Centauri
TLDR
Observations reveal the presence of a small planet with a minimum mass of about 1.3 Earth masses orbiting Proxima with a period of approximately 11.2 days at a semi-major-axis distance of around 0.05 astronomical units.
Upper limits for mass and radius of objects around Proxima Cen from SPHERE/VLT
The recent discovery of an earth-like planet around Proxima Centauri has drawn much attention to this star and its environment. We performed a series of observations of Proxima Centauri using
Proxima’s orbit around α Centauri
Proxima and α Centauri AB have almost identical distances and proper motions with respect to the Sun. Although the probability of such similar parameters is, in principle, very low, the question as
ALMA Discovery of Dust Belts Around Proxima Centauri
Proxima Centauri, the star closest to our Sun, is known to host at least one terrestrial planet candidate in a temperate orbit. Here we report the ALMA detection of the star at 1.3 mm wavelength and
The gravitational mass of Proxima Centauri measured with SPHERE from a microlensing event
Proxima Centauri, our closest stellar neighbour, is a low-mass M5 dwarf orbiting in a triple system. An Earth-mass planet with an 11 day period has been discovered around this star. The star's mass
Toward detection of terrestrial planets in the habitable zone of our closest neighbor: proxima Centauri
Context. The precision of radial velocity (RV) measurements to detect indirectly planetary companions of nearby stars has improved to enable the discovery of extrasolar planets in the Neptune and
A candidate super-Earth planet orbiting near the snow line of Barnard’s star
TLDR
Analysis of 20 years of observations of Barnard’s star from seven facilities reveals a signal with a period of 233 days that is indicative of a companion planet, and a long-term modulation that could arise from a stellar magnetic-activity cycle or from a more distant planetary object is revealed.
Astrometric detection of giant planets around nearby M dwarfs: the Gaia potential
Cool M dwarfs within a few tens of parsecs from the Sun are becoming the focus of dedicated observational programs in the realm of exoplanet astrophysics. Gaia, in its all-sky survey of >10 9
Optical, UV, and X-ray evidence for a 7-yr stellar cycle in Proxima Centauri
Stars of stellar type later than about M3.5 are believed to be fully convective and therefore unable to support magnetic dynamos like the one that produces the 11-year solar cycle. Because of their
An Increase in the Mass of Planetary Systems around Lower-Mass Stars
Trends in the planet population with host star mass provide an avenue to constrain planet formation theories. We derive the planet radius distribution function for Kepler stars of different spectral
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