# # Program information file # PROGRAM_ID 2022B012 PROGRAM_TITLE Running Out of Gas near the End of Planet Formation PROGRAM_INV1 Eric Gaidos PROGRAM_INV2 Alexa Anderson PROGRAM_INV3 Rena Lee PROGRAM_INV4 PROGRAM_INV5 PROGRAM_SCICAT extra-solar planets PROGRAM_ABSTRACT_BEG We propose multi-epoch infrared [0.8-2.5 micron] spectroscopy of the enigmatic 20-50 Myr-old debris disk-hosting star RZ Psc to understand the connection between the dusty structures occulting the star, which causes episodic dimming, and gas which is responsible for transient, Doppler-shifted lines in the star's spectrum. The anomalous photometric and spectroscopic behavior of RZ Psc has been explained by disintegrating asteroids, a disrupted close-in giant planet, or anemic accretion from a disk that is simply running out of gas. Spectra will be obtained with SpeX contemporaneously with precise, high-cadence, and nearly continuous photometry from TESS, allowing us to correlate variation in lines of H and He gas with dimming caused by dust and distinguish possible scenarios for this phenomenon. Studies of stars like RZ Psc are critical to understanding the late stages of disk disk dissipation and planet formation. PROGRAM_ABSTRACT_END