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A multiplanet system of super-Earths orbiting the brightest red dwarf star GJ 887.

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Title: A multiplanet system of super-Earths orbiting the brightest red dwarf star GJ 887.
Authors: Jeffers, S. V., Dreizler, S., Barnes, J. R., Haswell, C. A., Nelson, R. P., Rodríguez, E., López-González, M. J., Morales, N., Luque, R., Zechmeister, M., Vogt, S. S., Jenkins, J. S., Palle, E., Berdiñas, Z. M., Coleman, G. A. L., Díaz, M. R., Ribas, I., Jones, H. R. A., Butler, R. P., Tinney, C. G.
Source: Science (pre-March 2025). 6/26/2020, Vol. 368 Issue 6498, p1477-1481. 5p. 3 Diagrams, 1 Chart.
Subjects: Radial velocity of stars, Dwarf stars, Extrasolar planets, Albedo, Solar system
Abstract: The closet exoplanets to the Sun provide opportunities for detailed characterization of planets outside the Solar System. We report the discovery, using radial velocity measurements, of a compact multiplanet system of super-Earth exoplanets orbiting the nearby red dwarf star GJ 887. The two 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 ~350 kelvin. The planets are interior to, but close to the inner edge of, the liquid-water habitable zone. We also detect an unconfirmed signal with a period of ~50 days, which could correspond to a third super-Earth in a more temperate orbit. Our observations show that GJ 887 has photometric variability below 500 parts per million, which is unusually quiet for a red dwarf. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: A multiplanet system of super-Earths orbiting the brightest red dwarf star GJ 887.
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  Data: <searchLink fieldCode="AR" term="%22Jeffers%2C+S%2E+V%2E%22">Jeffers, S. V.</searchLink><br /><searchLink fieldCode="AR" term="%22Dreizler%2C+S%2E%22">Dreizler, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Barnes%2C+J%2E+R%2E%22">Barnes, J. R.</searchLink><br /><searchLink fieldCode="AR" term="%22Haswell%2C+C%2E+A%2E%22">Haswell, C. A.</searchLink><br /><searchLink fieldCode="AR" term="%22Nelson%2C+R%2E+P%2E%22">Nelson, R. P.</searchLink><br /><searchLink fieldCode="AR" term="%22Rodríguez%2C+E%2E%22">Rodríguez, E.</searchLink><br /><searchLink fieldCode="AR" term="%22López-González%2C+M%2E+J%2E%22">López-González, M. J.</searchLink><br /><searchLink fieldCode="AR" term="%22Morales%2C+N%2E%22">Morales, N.</searchLink><br /><searchLink fieldCode="AR" term="%22Luque%2C+R%2E%22">Luque, R.</searchLink><br /><searchLink fieldCode="AR" term="%22Zechmeister%2C+M%2E%22">Zechmeister, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Vogt%2C+S%2E+S%2E%22">Vogt, S. S.</searchLink><br /><searchLink fieldCode="AR" term="%22Jenkins%2C+J%2E+S%2E%22">Jenkins, J. S.</searchLink><br /><searchLink fieldCode="AR" term="%22Palle%2C+E%2E%22">Palle, E.</searchLink><br /><searchLink fieldCode="AR" term="%22Berdiñas%2C+Z%2E+M%2E%22">Berdiñas, Z. M.</searchLink><br /><searchLink fieldCode="AR" term="%22Coleman%2C+G%2E+A%2E+L%2E%22">Coleman, G. A. L.</searchLink><br /><searchLink fieldCode="AR" term="%22Díaz%2C+M%2E+R%2E%22">Díaz, M. R.</searchLink><br /><searchLink fieldCode="AR" term="%22Ribas%2C+I%2E%22">Ribas, I.</searchLink><br /><searchLink fieldCode="AR" term="%22Jones%2C+H%2E+R%2E+A%2E%22">Jones, H. R. A.</searchLink><br /><searchLink fieldCode="AR" term="%22Butler%2C+R%2E+P%2E%22">Butler, R. P.</searchLink><br /><searchLink fieldCode="AR" term="%22Tinney%2C+C%2E+G%2E%22">Tinney, C. G.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 6/26/2020, Vol. 368 Issue 6498, p1477-1481. 5p. 3 Diagrams, 1 Chart.
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  Data: <searchLink fieldCode="DE" term="%22Radial+velocity+of+stars%22">Radial velocity of stars</searchLink><br /><searchLink fieldCode="DE" term="%22Dwarf+stars%22">Dwarf stars</searchLink><br /><searchLink fieldCode="DE" term="%22Extrasolar+planets%22">Extrasolar planets</searchLink><br /><searchLink fieldCode="DE" term="%22Albedo%22">Albedo</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+system%22">Solar system</searchLink>
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  Data: The closet exoplanets to the Sun provide opportunities for detailed characterization of planets outside the Solar System. We report the discovery, using radial velocity measurements, of a compact multiplanet system of super-Earth exoplanets orbiting the nearby red dwarf star GJ 887. The two 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 ~350 kelvin. The planets are interior to, but close to the inner edge of, the liquid-water habitable zone. We also detect an unconfirmed signal with a period of ~50 days, which could correspond to a third super-Earth in a more temperate orbit. Our observations show that GJ 887 has photometric variability below 500 parts per million, which is unusually quiet for a red dwarf. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=144249160
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