Kavli Affiliate: Andrew Vanderburg
| First 5 Authors: Madyson G. Barber, Andrew W. Mann, Andrew Vanderburg, Andrew W. Boyle, Ana Isabel Lopez Murillo
| Summary:
Young (<500 Myr) multi-planet transiting systems are valuable environments
for understanding planet evolution by offering an opportunity to make direct
comparisons between planets from the same formation conditions. TOI-2076 is
known to harbor three, 2.5-4 $R_oplus$ planets on 10-35 day orbits. All three
are JWST cycle 3 targets (for transmission spectroscopy). Here, we present the
detection of TOI-2076 e; a smaller (1.35 $R_oplus$), inner (3.02 day) planet
in the system. We update the age of the system by analyzing the rotation
periods, Lithium equivalent widths, color-magnitude diagram, and variability of
likely co-moving stars, finding that TOI-2076 and co-moving planetary system
TOI-1807 are 210 $pm$ 20 Myr. The discovery of TOI-2076 e is motivation to
revisit known transiting systems in search of additional planets that are now
detectable with new TESS data and updated search methods.
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