@Astro_JRod

Spitzer Confirms the First Habitable-Zone Earth-Sized Planet from TESS

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Joey RodriguezSAO Astronomer

Center for Astrophysics | Harvard & Smithsonian (joseph.rodriguez@cfa.harvard.edu)01/06/2020 AAS 235 Honolulu, HI

@Astro_JRodRodriguez, Vanderburg, Zieba et al. 2020, AAS Journals

Gilbert, Schlieder, Barclay et al. 2020, AAS JournalsSuissa, Wolf, Karapparu et al. 2020, AAS Journals

Rodriguez, Vanderburg, Zieba et al. 2020, AAS JournalsGilbert, Schlieder, Barclay et al. 2020, AAS Journals

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NASA’s Spitzer Space Telescope• Launched in August 2003

• Spitzer = 0.85m (~64x larger area)

• Rule out remaining false positive scenarios

• Spitzer DDT of TOI-700 d:October 22nd, 2019 (P.I. Vanderburg)

TESS = 0.105m

@Astro_JRod4

Exoplanets 101: Transits

https://svs.gsfc.nasa.gov/

TOI-700 c Transit with LCOGT

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TOI-700 c = 2.65 Earth Radii, P = 16.05 daysRodriguez, Vanderburg, Zieba et al. 2020, AAS Journals

TOI-700 d Transit with Spitzer

6Rodriguez, Vanderburg, Zieba et al. 2020, AAS Journals

TOI-700 d’s ParametersIs TOI-700 d Rocky?

Need Radial Velocities!• TOI-700 d = 1.22 Earth Radii, P = 37.42 days• TESS + Spitzer improve confidence on Radius and Period

@Astro_JRod7https://svs.gsfc.nasa.gov/ TOI-700 d tugs the star at 80 cm/s

Future Mass Measurements: Radial Velocity

Future Mass Measurements: Radial Velocity

8https://kids.guinnessworldrecords.com/

Bertie’s speed = 28 cm/s

TOI-700 d tugs the star at 80 cm/s

9Rodriguez, Vanderburg, Zieba et al. 2020, AAS Journals

Prospects for Future Mass Measurements

Light Received (Relative to Earth)

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Contact Information

Joey Rodriguez, SAO Astronomer• Twitter: @Astro_JRod• Email: joseph.rodriguez@cfa.harvard.edu• https://sites.google.com/site/josepherodriguezjr/