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A Neptune-sized transiting planet closely orbiting a 5–10-million-year-old star.
Nature 2016; 534(7609):658-61Nat

Abstract

Theories of the formation and early evolution of planetary systems postulate that planets are born in circumstellar disks, and undergo radial migration during and after dissipation of the dust and gas disk from which they formed. The precise ages of meteorites indicate that planetesimals—the building blocks of planets—are produced within the first million years of a star’s life. Fully formed planets are frequently detected on short orbital periods around mature stars. Some theories suggest that the in situ formation of planets close to their host stars is unlikely and that the existence of such planets is therefore evidence of large-scale migration. Other theories posit that planet assembly at small orbital separations may be common. Here we report a newly born, transiting planet orbiting its star with a period of 5.4 days. The planet is 50 per cent larger than Neptune, and its mass is less than 3.6 times that of Jupiter (at 99.7 per cent confidence), with a true mass likely to be similar to that of Neptune. The star is 5–10 million years old and has a tenuous dust disk extending outward from about twice the Earth–Sun separation, in addition to the fully formed planet located at less than one-twentieth of the Earth–Sun separation.

Authors

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Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

27324846

Citation

David, Trevor J., et al. "A Neptune-sized Transiting Planet Closely Orbiting a 5–10-million-year-old Star." Nature, vol. 534, no. 7609, 2016, pp. 658-61.
David TJ, Hillenbrand LA, Petigura EA, et al. A Neptune-sized transiting planet closely orbiting a 5–10-million-year-old star. Nature. 2016;534(7609):658-61.
David, T. J., Hillenbrand, L. A., Petigura, E. A., Carpenter, J. M., Crossfield, I. J., Hinkley, S., ... Barenfeld, S. A. (2016). A Neptune-sized transiting planet closely orbiting a 5–10-million-year-old star. Nature, 534(7609), pp. 658-61.
David TJ, et al. A Neptune-sized Transiting Planet Closely Orbiting a 5–10-million-year-old Star. Nature. 2016 06 30;534(7609):658-61. PubMed PMID: 27324846.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A Neptune-sized transiting planet closely orbiting a 5–10-million-year-old star. AU - David,Trevor J, AU - Hillenbrand,Lynne A, AU - Petigura,Erik A, AU - Carpenter,John M, AU - Crossfield,Ian J M, AU - Hinkley,Sasha, AU - Ciardi,David R, AU - Howard,Andrew W, AU - Isaacson,Howard T, AU - Cody,Ann Marie, AU - Schlieder,Joshua E, AU - Beichman,Charles A, AU - Barenfeld,Scott A, Y1 - 2016/06/20/ PY - 2016/03/11/received PY - 2016/04/22/accepted PY - 2016/6/22/entrez PY - 2016/6/22/pubmed PY - 2016/6/22/medline SP - 658 EP - 61 JF - Nature JO - Nature VL - 534 IS - 7609 N2 - Theories of the formation and early evolution of planetary systems postulate that planets are born in circumstellar disks, and undergo radial migration during and after dissipation of the dust and gas disk from which they formed. The precise ages of meteorites indicate that planetesimals—the building blocks of planets—are produced within the first million years of a star’s life. Fully formed planets are frequently detected on short orbital periods around mature stars. Some theories suggest that the in situ formation of planets close to their host stars is unlikely and that the existence of such planets is therefore evidence of large-scale migration. Other theories posit that planet assembly at small orbital separations may be common. Here we report a newly born, transiting planet orbiting its star with a period of 5.4 days. The planet is 50 per cent larger than Neptune, and its mass is less than 3.6 times that of Jupiter (at 99.7 per cent confidence), with a true mass likely to be similar to that of Neptune. The star is 5–10 million years old and has a tenuous dust disk extending outward from about twice the Earth–Sun separation, in addition to the fully formed planet located at less than one-twentieth of the Earth–Sun separation. SN - 1476-4687 UR - https://www.unboundmedicine.com/medline/citation/27324846/A_Neptune_sized_transiting_planet_closely_orbiting_a_5–10_million_year_old_star_ L2 - https://doi.org/10.1038/nature18293 DB - PRIME DP - Unbound Medicine ER -