FROM DEAD TO HABITABLE EXOPLANETS AT ARECIBO The Science and Outreach of the PHL @ UPR Arecibo
Abel Méndez Planetary Habitability Laboratory University of Puerto Rico at Arecibo Four Types of Exoplanets
Dead Habitable Living Intelligent Planets Planets Planets Planets
ARECIBO OBSERVATORY ARECIBO OBSERVATORY University of Puerto Rico at Arecibo A virtual laboratory of the habitable universe Credit: PHL @ UPR Arecibo What is an Habitable Exoplanet?
Credit: NASA/Wikimedia Commons/Nickelodeon What is a Poten ally Habitable Exoplanet?
Right Orbit (within the HZ) Right Size (0.5 — 2.0 RE)
F Superterran 1.18 — 2.84 AU SuperEarth-size 1.25 — 2.0 R E
G 0.75 — 1.84 AU Terran Earth-size 0.8 — 1.25 RE K 0.48 — 1.23 AU Subterran Mars-size M 0.5 — 0.8 RE 0.09 — 0.24 AU Credit: PHL @ UPR Arecibo Sta s cal Distribu on of Habitable Exoplanets
ηEarth αEarth δEarth
Frequency Diversity Distance
Credit: PHL @ UPR Arecibo Habitability Metrics for Exoplanets ESI HZD SPH
0 0.5 1.0 -1 0 +1 0 0.5 1.0 Habitable Zone
Earth Similarity Index Habitable Zone Distance Standard Primary Habitability (stellar flux, mass/radius of planet) (HZ size, orbit of planet) (many parameters)
Credit: PHL @ UPR Arecibo Prototype Habitable Exoplanets
Earth- Earth= Earth+ [Barely habitable] [As habitable as Earth] [More habitable than Earth]
Credit: PHL @ UPR Arecibo
Planetary Classifica on Planetary bodies are classified based on their star, orbit, and size
Example Earth G Warm Terran
Star Type Size Type Orbit Type Jovian • Neptunian O • B • A• F • G • K • M Hot • Warm ‘HZ’ • Cold Superterran • Terran • Subterran L • T • WD • PSR Mercurian • Asteroidan
CREDIT: PHL @ UPR Arecibo, NASA Hubble Over 1,000 Confirmed Exoplanets Terrestrial Gas Giants
Mercurian Subterran Terran Superterran Neptunian Mercury-Size Mars-Size Earth-Size SuperEarth-Size Neptune-Size
Jovian Poten ally habitable depending on orbit and size. Jupiter-Size
Number of discovered confirmed exoplanets in red. Those s ll unconfirmed from the NASA Kepler Mission in green. Credit: PHL @ UPR Arecibo
An Earth-like Exoplanet for Astronomers PHL @ UPR Arecibo phl.upr.edu A virtual laboratory studying the habitability of Earth, the Solar System, and Exoplanets Exoplanet Science • Habitability Metrics. • Defini on and Classifica on of Habitable Exoplanets. • Search for Habitable Exoplanets. Outreach • Educa onal Content and Workshops • Visualiza ons