Discovery of a bright microlensing event with planetary features towards the Taurus region: a super-Earth planet
Abstract
The transient event labelled as TCP J05074264+2447555 recently discovered towards the Taurus region was quickly recognized to be an ongoing microlensing event on a source located at distance of only 700-800 pc from Earth. Here, we show that observations with high sampling rate close to the time of maximum magnification revealed features that imply the presence of a binary lens system with very low-mass ratio components. We present a complete description of the binary lens system, which host an Earth-like planet with most likely mass of 9.2 ± 6.6 M⊕. Furthermore, the source estimated location and detailed Monte Carlo simulations allowed us to classify the event as due to the closest lens system, being at a distance of ≃380 pc and mass ≃0.25 M⊙.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- May 2018
- DOI:
- 10.1093/mnras/sty448
- arXiv:
- arXiv:1802.06659
- Bibcode:
- 2018MNRAS.476.2962N
- Keywords:
-
- gravitational lensing: micro;
- planetary systems;
- Astrophysics - Earth and Planetary Astrophysics
- E-Print:
- Accepted for publication on MNRAS, 2018. 6 Pages, 5 Figures. References updated