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OGLE-2013-BLG-1761Lb: A Massive Planet Around an M/K Dwarf
- Publication Year :
- 2017
- Publisher :
- arXiv, 2017.
-
Abstract
- We report the discovery and the analysis of the planetary microlensing event, OGLE-2013-BLG-1761. There are some degenerate solutions in this event because the planetary anomaly is only sparsely sampled. But the detailed light curve analysis ruled out all stellar binary models and shows that the lens to be a planetary system. There is the so-called close/wide degeneracy in the solutions with the planet/host mass ratio of $q \sim (7.5 \pm 1.5) \times 10^{-3}$ and $q \sim (9.3 \pm 2.9) \times 10^{-3}$ with the projected separation in Einstein radius units of $s = 0.95$ (close) and $s = 1.19$ (wide), respectively. The microlens parallax effect is not detected but the finite source effect is detected. Our Bayesian analysis indicates that the lens system is located at $D_{\rm L}=6.9_{-1.2}^{+1.0} \ {\rm kpc}$ away from us and the host star is an M/K-dwarf with the mass of $M_{\rm L}=0.33_{-0.18}^{+0.32} \ M_{\odot}$ orbited by a super-Jupiter mass planet with the mass of $m_{\rm P}=2.8_{-1.5}^{+2.5} \ M_{\rm Jup}$ at the projected separation of $a_{\perp}=1.8_{-0.5}^{+0.5} \ {\rm AU}$. The preference of the large lens distance in the Bayesian analysis is due to the relatively large observed source star radius. The distance and other physical parameters can be constrained by the future high resolution imaging by ground large telescopes or HST. If the estimated lens distance is correct, this planet provides another sample for testing the claimed deficit of planets in the Galactic bulge.<br />Comment: 22pages, 7figures, 2tables, submitted to AAS Journals
- Subjects :
- Physics
Earth and Planetary Astrophysics (astro-ph.EP)
010504 meteorology & atmospheric sciences
Star (game theory)
FOS: Physical sciences
Astronomy and Astrophysics
Radius
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Mass ratio
Planetary system
Light curve
Gravitational microlensing
01 natural sciences
Einstein radius
Space and Planetary Science
Planet
0103 physical sciences
Astrophysics::Earth and Planetary Astrophysics
010303 astronomy & astrophysics
Astrophysics::Galaxy Astrophysics
0105 earth and related environmental sciences
Astrophysics - Earth and Planetary Astrophysics
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....9c876e46f7fac39873c1bdb32e963fa1
- Full Text :
- https://doi.org/10.48550/arxiv.1703.07623