TCP J05074264+2447555 - Microlensing detection of a super-Earth only ~380 pc away toward Taurus

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TCP J05074264+2447555 - Microlensing detection of a super-Earth only ~380 pc away toward Taurus

Post by Sirius_Alpha on 19th February 2018, 9:38 pm

Discovery of a bright microlensing event with planetary features towards the Taurus region: a super Earth planet
https://arxiv.org/abs/1802.06659

The transient event labeled 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 hosts an Earth-like planet with most likely mass of 9.26.6 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⊙.

At the estimated distance and projected separation, the planet would be 0.5 AU from the star. They also recommend the name Feynman-01 for the planet.

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Re: TCP J05074264+2447555 - Microlensing detection of a super-Earth only ~380 pc away toward Taurus

Post by Lazarus on 20th February 2018, 2:45 pm

We present a complete description of the binary lens system which hosts an Earth-like planet
Er, since when was a ~9 Earth masses planet orbiting 0.5 AU from a 0.25 solar mass M-dwarf "Earth-like"?
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