• DOI:10.1126/science.abd7645
• Corpus ID: 232124642

A nearby transiting rocky exoplanet that is suitable for atmospheric investigation

@article{Trifonov2021ANT,
  title={A nearby transiting rocky exoplanet that is suitable for atmospheric investigation},
  author={Trifon Trifonov and Jos{\'e} A. Caballero and J. C. Morales and Andreas Seifahrt and Ignasi Ribas and Ansgar Reiners and Jacob L. Bean and Rafael Luque and Hannu Parviainen and Enric Pall{\'e} and Stephan Stock and Mathias Zechmeister and Pedro J. Amado and Guillem Anglada-Escud{\'e} and M. Azzaro and Thomas Barclay and V. J. S. B{\'e}jar and P. Bluhm and N. Casasayas-Barris and Carlos Cifuentes and Karen A. Collins and Kevin I. Collins and M. Cort{\'e}s-Contreras and Jerome P. de Leon and Stefan Dreizler and Courtney D. Dressing and Emma Esparza-Borges and N{\'e}stor Espinoza and Michael M. Fausnaugh and A. Fukui and A. P. Hatzes and Coel Hellier and Th. Henning and Christopher E. Henze and E. Herrero and S. V. Jeffers and Jon M. Jenkins and Eric L. N. Jensen and A. Kaminski and David H. Kasper and D. Kossakowski and Martin K{\"u}rster and Marina Lafarga and David W. Latham and Andrew W. Mann and Karan Molaverdikhani and David Montes and Benjamin T. Montet and Felipe Murgas and Norio Narita and Mahmoudreza Oshagh and V. M. Passegger and Don Pollacco and Samuel N. Quinn and Andreas Quirrenbach and George R. Ricker and C. Rodr{\'i}guez L{\'o}pez and Jorge Sanz-Forcada and Richard P. Schwarz and A. Schweitzer and Sara Seager and Avi Shporer and Monika Stangret and Julian St{\"u}rmer and T. G. Tan and Peter Tenenbaum and Joseph D. Twicken and Roland K. Vanderspek and Joshua N. Winn},
  journal={Science},
  year={2021},
  volume={371},
  pages={1038 - 1041}
}

• T. Trifonov, J. Caballero, +66 authors J. Winn
• Published 5 March 2021
• Geology, Physics
• Science

A transiting rocky planet 8 parsecs away Most exoplanets have been detected using either the radial velocity (RV) method or the transit method, which provide only limited information on the planet's physical properties. In the rare cases in which both methods detect the same planet, the combination determines the planet's mass, radius, and density. Trifonov et al. identified a planet, Gliese 486 b, using both RV and transit data. The host star is a red dwarf only 8 parsecs away, making this one of the closest exoplanet systems known. A rocky super-Earth, Gliese 486 b has an equilibrium surface temperature of 700 kelvin. The authors say that it is observationally favorable for searches for an atmosphere. Science, this issue p. 1038 A hot rocky super-Earth exoplanet orbits a red dwarf star only 8 parsecs away. Spectroscopy of transiting exoplanets can be used to investigate their atmospheric properties and habitability. Combining radial velocity (RV) and transit data provides additional information on exoplanet physical properties. We detect a transiting rocky planet with an orbital period of 1.467 days around the nearby red dwarf star Gliese 486. The planet Gliese 486 b is 2.81 Earth masses and 1.31 Earth radii, with uncertainties of 5%, as determined from RV data and photometric light curves. The host star is at a distance of ~8.1 parsecs, has a J-band magnitude of ~7.2, and is observable from both hemispheres of Earth. On the basis of these properties and the planet’s short orbital period and high equilibrium temperature, we show that this terrestrial planet is suitable for emission and transit spectroscopy.