"Probing Exoplanets at the Diffraction Limit with Fiber-fed High-resolution Infrared Spectroscopy"

In this presentation, I will highlight recent discoveries made possible by the Keck Planet Imager and Characterizer (KPIC) at the W. M. Keck Observatory. KPIC's pioneering single-mode fiber-fed architecture, seamlessly integrating the Keck II adaptive optics system with the NIRSPEC infrared high-resolution spectrograph, has allowed us to delve into the chemodynamics of exoplanets and brown dwarf companions at close separations.

Utilizing KPIC, we have collected 30 R=35,000 K-band spectra of low-mass companions, providing new insights into their spins, orbits, and chemical compositions, including their carbon-to-oxygen ratio, metallicity, and isotopologues. These measurements provide valuable new perspectives on their formation processes through dynamics and chemistry. Furthermore, I will discuss preliminary findings from our ongoing survey for exo-satellites around specific targets within our sample, offering tantalizing prospects for further exploration.

KPIC's achievements have set the stage for future instruments such as Keck-HISPEC and TMT-MODHIS, poised to deliver even more refined spectroscopic capabilities for studying directly imaged exoplanets, as well as close-in and transiting planets, along with precise radial velocity measurements.