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A terrestrial planet candidate in a temperate orbit around Proxima Centauri
Open accessAbstract
At a distance of 1.295 parsecs, the red dwarf Proxima Centauri (α Centauri C, GL 551, HIP 70890 or simply Proxima) is the Sun’s closest stellar neighbour and one of the best-studied low-mass stars. It has an effective temperature of only around 3,050 kelvin, a luminosity of 0.15 per cent of that of the Sun, a measured radius of 14 per cent of the radius of the Sun and a mass of about 12 per cent of the mass of the Sun. Although Proxima is considered a moderately active star, its rotation period is about 83 days (ref. 3) and its quiescent activity levels and X-ray luminosity are comparable to those of the Sun. Here we report observations that 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. Its equilibrium temperature is within the range where water could be liquid on its surface.
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Cites
Equation of State Calculations by Fast Computing Machines
Metropolis, N., Rosenbluth, A. W., Rosenbluth, M. N., Teller, A. H., & Teller, E. (1953) · The Journal of Chemical Physics · doi:10.1063/1.1699114 · Cited by 37,192
HABITABLE ZONES AROUND MAIN-SEQUENCE STARS: NEW ESTIMATES
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Cited by
Reflections on O 2 as a Biosignature in Exoplanetary Atmospheres
Meadows, V. S. (2017) · Astrobiology · doi:10.1089/ast.2016.1578 · Cited by 173
Harrison, T. M. (2020) · doi:10.1007/978-3-030-46687-9 · Cited by 53
Implications of tides for life on exoplanets
Lingam, M., & Loeb, A. (2017) · arXiv · doi:10.48550/arxiv.1707.04594 · Cited by 37
Role of stellar physics in regulating the critical steps for life
Lingam, M., & Loeb, A. (2019) · International Journal of Astrobiology · doi:10.1017/s1473550419000016 · Cited by 25
Libralato, M., Bedin, L. R., & Burgasser, A. (2026) · Astronomy & Astrophysics · doi:10.1051/0004-6361/202557737
Metadata
- Authors
- Anglada-Escudé, G., Amado, P. J., Barnes, J., Berdiñas, Z. M., Butler, R. P., Coleman, G. A. L., de la Cueva, I., Dreizler, S., Endl, M., Giesers, B., Jeffers, S. V., Jenkins, J. S., Jones, H. R. A., Kiraga, M., Kürster, M., López-González, M. J., Marvin, C. J., Morales, N., Morin, J., Nelson, R. P., Ortiz, J. L., Ofir, A., Paardekooper, S.-J., Reiners, A., Rodríguez, E., Rodrίguez-López, C., Sarmiento, L. F., Strachan, J. P., Tsapras, Y., Tuomi, M., & Zechmeister, M.
- Venue
- Nature
- Published
- 2016-08
- Volume
- 536
- Issue
- 7617
- Pages
- 437-440
- ISSN
- 0028-0836 (ISSN-L)
- 1476-4687
- OpenAlex
- W2508168437
- Cited by
- 1,282
- References
- 3
- FWCI
- 116.38
- Type
- journal article
- Language
- en
- Open access
- bronze
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- The paper
- Anglada-Escudé, G., Amado, P. J., Barnes, J., Berdiñas, Z. M., Butler, R. P., Coleman, G. A. L., de la Cueva, I., Dreizler, S., Endl, M., Giesers, B., Jeffers, S. V., Jenkins, J. S., Jones, H. R. A., Kiraga, M., Kürster, M., López-González, M. J., Marvin, C. J., Morales, N., Morin, J., . . . Zechmeister, M. (2016). A terrestrial planet candidate in a temperate orbit around Proxima Centauri. Nature. https://doi.org/10.1038/nature19106
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
