KLD5
Keynote (EXOA): Revealing the Secrets of Rocky Exoplanets
Conveners:
Brian Jackson,
Francisco J. Pozuelos
WED-OB1 |
Wed, 10 Sep, 08:55–09:20 (EEST) Room Jupiter (Hall A)
Wed, 08:55
Abstract
Our first glimpses of rocky exoplanets show a large diversity. Our Solar System provides references for rocky worlds, but critical input for understanding a rocky planet’s evolution will come from observations of rocky extrasolar planets, filling in the patterns. The snapshots of evolutionary stages of rocky exoplanets in and beyond the Habitable Zone we have just started to observe will probe how position and age influence their diversity and observable spectra.
However, spectroscopy remains time-intensive, and therefore, initial characterization is critical to prioritize targets. Machine Learning algorithms hold a promise to initially identify water and biota on the surface of exoplanets using broad-band filter photometry to aid prioritization of targets for time-intense follow-up observations. Telescopes like JWST now, PLATO, Ariel, ELTs in the near future ,and designs like HWO and LIFE can probe the parameter space.
I will highlight key results and challenges to interpreting spectra of rocky exoplanets - and how considering dinosaurs can be helpful.
References:
Purple is the new green: biopigments and spectra of Earth-like purple worlds, LF Coelho, L Kaltenegger, S Zinder, W Philpot, TL Price, TL Hamilton, MNRAS 530 (2), 1363-1368, 2024
Oxygen bounty for Earth-like exoplanets: spectra of Earth through the Phanerozoic, RC Payne, L Kaltenegger, MNRAS Letters 527 (1), L151-L155, 2024
Hot Earth or young Venus? A nearby transiting rocky planet mystery, L Kaltenegger, RC Payne, Z Lin, J Kasting, L Delrez, MNRAS Letters 524 (1), L10-L14, 2023
Follow the water: finding water, snow, and clouds on terrestrial exoplanets with photometry and machine learning, Pham D. & Kaltenegger L., MNRAS, V513, L72,1, 2021.
Color classification of Earth-like planets with machine, Pham D. & Kaltenegger L., MNRAS, 504, 4, 2021.
Finding signs of life on Earth-like planets: high-resolution transmission spectra of Earth through time around FGKM stars, L Kaltenegger, Z Lin, S Rugheimer, ApJ 909 (1), 2021
Past, present and future stars that can see Earth as a transiting exoplanet, L Kaltenegger, JK Faherty, Nature 594 (7864), 505-507, 2021
A Catalog of Spectra, Albedos, and Colors of Solar System Bodies for Exoplanet Comparison, Madden J.H. & Kaltenegger L., Astrobiology, 18,12, 2018.
How to characterize a Habitable Planet, Kaltenegger L., Annual Review of Astronomy and Astrophysics 55, 433-485, 2017.
Transits of Earth-like planets, L Kaltenegger, WA Traub, ApJ 698 (1), 519, 2009
Spectral evolution of an Earth-like planet, L Kaltenegger, WA Traub, KW Jucks, ApJ 658 (1), 598