Astronomy:LkCa 15 b

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LkCa 15 b
Discovery
Discovered byKraus and Ireland[1]
Discovery siteKeck II
Discovery date2011
Direct imaging
Orbital characteristics
15.7 ± 2.1 AU (2.35×109 ± 310,000,000 km)[1]
StarLkCa 15


LkCa 15 b is a candidate protoplanetary object in orbit around LkCa 15, a star in the Taurus-Auriga Star Forming Region. It was discovered by direct imaging techniques using the Keck II telescope in 2011 by Adam Kraus and Michael Ireland.[1] A 2015 study of observations from the Magellan Telescopes and the Large Binocular Telescope argued that the planet is forming through accretion.[2] It is the first observed exoplanet seen in the process of active accretion.[3] The planet existence was refuted in 2019 as higher resolution imaging has become available.[4]

  • LkCa 15 protoplanetary Disk

References

  1. ↑ 1.0 1.1 1.2 Kraus, Adam L.; Ireland, Michael J. (2011). "LkCa 15: A Young Exoplanet Caught at Formation?". The Astrophysical Journal 745 (1): 5. doi:10.1088/0004-637X/745/1/5. Bibcode: 2012ApJ...745....5K. 
  2. ↑ Sallum, S.; Follette, K. B.; Eisner, J. A.; Close, L. M.; Hinz, P.; Kratter, K.; Males, J.; Skemer, A. et al. (2015). "Accreting protoplanets in the LkCa 15 transition disk". Nature 527 (7578): 342–344. doi:10.1038/nature15761. ISSN 0028-0836. PMID 26581290. Bibcode: 2015Natur.527..342S. 
  3. ↑ Irene Klotz (18 November 2015). "Astronomers see planet still growing in its stellar womb". Reuters (News Daily). http://newsdaily.com/2015/11/astronomers-see-planet-still-growing-in-its-stellar-womb/. 
  4. ↑ NO CLEAR, DIRECT EVIDENCE FOR MULTIPLE PROTOPLANETS ORBITING LKCA 15:LKCA 15 bcd ARE LIKELY INNER DISK SIGNALS, 2019 

External links

  • LkCa 15 b listing at the Exoplanet.eu, the Extrasolar Planet Encyclopedia





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