A super-jupiter orbiting a late-type star: A refined analysis of microlensing event OGLE-2012-BLG-0406

Journal Article · Mon Feb 10 00:00:00 EST 2014 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/782/1/48· OSTI ID:22348021

Tsapras, Y.; Street, R. A. ^[1]; Choi, J. -Y.; Han, C. ^[2]; Bozza, V. ^[3]; Gould, A. ^[4]; Dominik, M.; Browne, P.; Horne, K.; Hundertmark, M. ^[5]; Beaulieu, J. -P. ^[6]; Udalski, A. ^[7]; Jørgensen, U. G. ^[8]; Sumi, T. ^[9]; Bramich, D. M.; Kains, N. ^[10]; Ipatov, S.; Alsubai, K. A. ^[11]; Snodgrass, C. ^[12]; Steele, I. A. ^[13] ; others, and

---

1. Las Cumbres Observatory Global Telescope Network, 6740 Cortona Drive, Suite 102, Goleta, CA 93117 (United States)
2. Department of Physics, Chungbuk National University, Cheongju 361-763 (Korea, Republic of)
3. Dipartimento di Fisica "E. R. Caianiello," Università di Salerno, Via Giovanni Paolo II n. 132, I-84084 Fisciano (Italy)
4. Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210 (United States)
5. SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS (United Kingdom)
6. UPMC-CNRS, UMR7095, Institut d'Astrophysique de Paris, 98bis boulevard Arago, F-75014 Paris (France)
7. Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa (Poland)
8. Niels Bohr Institute, Astronomical Observatory, Juliane Maries vej 30, DK-2100 Copenhagen (Denmark)
9. Department of Earth and Space Science, Osaka University, Osaka 560-0043 (Japan)
10. European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 Garching bei München (Germany)
11. Qatar Foundation, P.O. Box 5825, Doha (Qatar)
12. Max Planck Institute for Solar System Research, Max-Planck-Str. 2, D-37191 Katlenburg-Lindau (Germany)
13. Astrophysics Research Institute, Liverpool John Moores University, Liverpool CH41 1LD (United Kingdom)

We present a detailed analysis of survey and follow-up observations of microlensing event OGLE-2012-BLG-0406 based on data obtained from 10 different observatories. Intensive coverage of the light curve, especially the perturbation part, allowed us to accurately measure the parallax effect and lens orbital motion. Combining our measurement of the lens parallax with the angular Einstein radius determined from finite-source effects, we estimate the physical parameters of the lens system. We find that the event was caused by a 2.73 ± 0.43 M {sub J} planet orbiting a 0.44 ± 0.07 M {sub ☉} early M-type star. The distance to the lens is 4.97 ± 0.29 kpc and the projected separation between the host star and its planet at the time of the event is 3.45 ± 0.26 AU. We find that the additional coverage provided by follow-up observations, especially during the planetary perturbation, leads to a more accurate determination of the physical parameters of the lens.

• OSTI ID: 22348021
• Journal Information: Astrophysical Journal, Vol. 782, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
DISTANCE
DISTURBANCES
GRAVITATIONAL LENSES
JUPITER PLANET
PERTURBATION THEORY
STARS
VISIBLE RADIATION