Unbound or distant planetary mass population detected by gravitational microlensing

@article{SumiKamiyaBennettBondAbeBotzlerFukuiFurusaw20,
  title={Unbound or distant planetary mass population detected by gravitational microlensing},
  author={T. K. D. P. I. A. F. C. S. A. K. J. B. Y. P. M. A. W. Sumi Kamiya Bennett Bond Abe Botzler Fukui Furusaw and Takahiro Sumi and Koki Kamiya and David P. Bennett and Ian A. Bond and Fumio Abe and Christine S. Botzler and Akihiko Fukui and Kei Furusawa and John B. Hearnshaw and Yoshitaka Itow and Pam M. Kilmartin and Aarno Korpela and W. Lin and Cho Hong Ling and Kimiaki Masuda and Yoshimi Matsubara and N. Miyake and Masanori Motomura and Yasushi Muraki and M. Nagaya and S. Nakamura and Kouji Ohnishi and Teppei Okumura and Yvette Perrott and Nicholas J. Rattenbury and To. Saito and T. Sako and Denis J. Sullivan and Winston L. Sweatman and Paul J. Tristram and Ph. Yock and A. M. K. M. G. R. I. Ł. K. Udalski Szymański Kubiak Pietrzyński Poleski Soszy and Andrzej Udalski and Michał K. Szymański and Marcin Kubiak and G. Pietrzynski and R. Poleski and Igor Soszyński and Łukasz Wyrzykowski and Krzysztof Ulaczyk},
  journal={Nature},
  year={2011},
  volume={473},
  pages={349-352}
}
  • T. K. D. P. I. A. F. C. S. A. K. J. B. Y. P. M. A. W. Sumi Kamiya Bennett Bond Abe Botzler Fukui Furusaw, T. Sumi, +38 authors K. Ulaczyk
  • Published 2011
  • Physics, Medicine
  • Nature
Since 1995, more than 500 exoplanets have been detected using different techniques, of which 12 were detected with gravitational microlensing. Most of these are gravitationally bound to their host stars. There is some evidence of free-floating planetary-mass objects in young star-forming regions, but these objects are limited to massive objects of 3 to 15 Jupiter masses with large uncertainties in photometric mass estimates and their abundance. Here, we report the discovery of a population of… Expand
No large population of unbound or wide-orbit Jupiter-mass planets
TLDR
A sample of microlensing events six times larger than that of ref. 11 is analysed, finding no excess of events with timescales in this range, with a 95 per cent upper limit on the frequency of Jupiter-mass free-floating or wide-orbit planets of 0.25 planets per main-sequence star. Expand
Microlensing Constraints on the Abundance of Extrasolar Planets
  • A. Cassan
  • Physics
  • Proceedings of the International Astronomical Union
  • 2012
Abstract Galactic gravitational microlensing is a powerful technique to detect extrasolar planets at large orbital distances from their stars, from giant down to Earth-mass planets. We report aExpand
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