Conference proceedings ; Online: The Earth 2.0 space mission
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
2023
Abstract: The “Earth 2.0 (ET)” mission in China is to address a few of fundamental questions in the exoplanet field: How frequently habitable Earth-like planets orbit solar type stars (Earth 2.0s)? How do terrestrial planets form and evolve? Where did floating ... ...
Abstract | The “Earth 2.0 (ET)” mission in China is to address a few of fundamental questions in the exoplanet field: How frequently habitable Earth-like planets orbit solar type stars (Earth 2.0s)? How do terrestrial planets form and evolve? Where did floating planets come from? ET consists of six 30 cm diameter transit telescope systems with each field of view of 500 square degrees and one 35 cm diameter microlensing telescope with a field of view of 4 square degrees. The ET transit mode will monitor ~1.2M FGKM dwarfs in the original Kepler field and its neighboring fields continuously for four years while the microlensing mode monitors over 30M I< 20.5 stars in the Galactic bulge direction. ET will merge its photometry data with that from Kepler to increase the time baseline to 8 years. This enhances the transit signal-to-noise ratio, reduce false positives, and greatly increases the chance to discover Earth 2.0s. Simulations show that ET transit telescopes will be able to identify ~17 Earth 2.0s, about 5000 Earth-sized terrestrial planets and over 30,000 new planets. The ET microlensing telescope will be able to identify over 1000 microlensing planets. With simultaneous observations with the ground-based KMTNet telescopes, ET will be able to measure masses of over 300 microlensing planets and determine the mass distribution functions of free-floating planets and cold planets. ET will be operated at the Earth-Sun L2 orbit with a designed lifetime longer than 4 years. The mission status will be reported. |
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Subject code | 520 |
Language | English |
Publishing country | de |
Document type | Conference proceedings ; Online |
Database | BASE - Bielefeld Academic Search Engine (life sciences selection) |
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