Webbläsaren som du använder stöds inte av denna webbplats. Alla versioner av Internet Explorer stöds inte längre, av oss eller Microsoft (läs mer här: * https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Var god och använd en modern webbläsare för att ta del av denna webbplats, som t.ex. nyaste versioner av Edge, Chrome, Firefox eller Safari osv.

The first Neptune analog or super-earth with a Neptune-like orbit : MOA-2013-BLG-605LB

In English

Författare

  • T. Sumi
  • A. Udalski
  • D. P. Bennett
  • A. Gould
  • R. Poleski
  • I. A. Bond
  • J. Skowron
  • N. Rattenbury
  • R. W. Pogge
  • T. Bensby
  • J. P. Beaulieu
  • J. B. Marquette
  • V. Batista
  • S. Brillant
  • F. Abe
  • Y. Asakura
  • A. Bhattacharya
  • M. Donachie
  • M. Freeman
  • A. Fukui
  • Y. Hirao
  • Y. Itow
  • N. Koshimoto
  • M. C A Li
  • C. H. Ling
  • K. Masuda
  • Y. Matsubara
  • Y. Muraki
  • M. Nagakane
  • K. Ohnishi
  • H. Oyokawa
  • To Saito
  • A. Sharan
  • D. J. Sullivan
  • D. Suzuki
  • P. J. Tristram
  • A. Yonehara
  • M. K. Szymański
  • K. Ulaczyk
  • S. Kozłowski
  • Wyrzykowski
  • M. Kubiak
  • P. Pietrukowicz
  • G. Pietrzyński
  • I. Soszyński
  • C. Han
  • Y. K. Jung
  • I. G. Shin
  • C. U. Lee
Visa allt

Summary, in English

We present the discovery of the first Neptune analog exoplanet or super-Earth with a Neptune-like orbit, MOA-2013-BLG-605Lb. This planet has a mass similar to that of Neptune or a super-Earth and it orbits at 9 ∼ 14 times the expected position of the snow line, a snow, which is similar to Neptune's separation of 11 a snow from the Sun. The planet/host-star mass ratio is q = (3.6 ± 0.7) × 10-4 and the projected separation normalized by the Einstein radius is s = 2.39 ± 0.05. There are three degenerate physical solutions and two of these are due to a new type of degeneracy in the microlensing parallax parameters, which we designate "the wide degeneracy." The three models have (i) a Neptune-mass planet with a mass of Mp = 21-7 +6M⊕ orbiting a low-mass M-dwarf with a mass of Mh = 0.19-0.06 +0.05M⊙, (ii) a mini-Neptune with Mp = 7.9-1.2 +1.8M⊕ orbiting a brown dwarf host with Mh = 0.068-0.011 +0.019M⊙, and (iii) a super-Earth with Mp = 3.2-0.3 +0.5MM⊕ orbiting a low-mass brown dwarf host with Mh = 0.025-0.0004 +0.005M⊙, which is slightly favored. The 3D planet-host separations are 4.6-1.2 +4.7au, 2.1-0.2 +1.0au, and 0.94-0.02 +0.67au, which are 8.9-1.4 +10.5, 12-1 +7, or 14-1 +11 times larger than a snow for these models, respectively. Keck adaptive optics observations confirm that the lens is faint. This discovery suggests that low-mass planets with Neptune-like orbits are common. Therefore processes similar to the one that formed Neptune in our own solar system or cold super-Earths may be common in other solar systems.

Publiceringsår

2016-07-10

Språk

Engelska

Publikation/Tidskrift/Serie

Astrophysical Journal

Volym

825

Issue

2

Dokumenttyp

Artikel i tidskrift

Förlag

American Astronomical Society

Ämne

  • Astronomy, Astrophysics and Cosmology

Nyckelord

  • Galaxy: bulge
  • gravitational lensing: micro
  • planetary systems

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0004-637X