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astro-ph.SR2025
The Hubble Ultracool Multiplicity (HUM) Survey. I. Characterizing Sensitivity to Companions at Sub-Diffraction Limit Separations with HST WFC3/IR
Kunal Mehta, Matthew De Furio, Daniella Bardalez Gagliuffi +6
We characterize the sensitivity of a double point-spread function (PSF) fitting algorithm -- employing empirical, position-dependent PSF models -- for detecting companions using th…
astro-ph.EP2025
exoALMA XI: ALMA Observations and Hydrodynamic Models of LkCa 15: Implications for Planetary Mass Companions in the Dust Continuum Cavity
Charles H. Gardner, Andrea Isella, Hui Li +43
In the past decade, the Atacama Large Millimeter/submillimeter Array (ALMA) has revealed a plethora of substructures in the disks surrounding young stars. These substructures have…
astro-ph.EP2025
H Variability of AB Aur b with the Hubble Space Telescope: Probing the Nature of a Protoplanet Candidate with Accretion Light Echoes
Brendan P. Bowler, Yifan Zhou, Lauren I. Biddle +11
Giant planets generate accretion luminosity as they form. Much of this energy is radiated in strong H line emission, which has motivated direct imaging surveys at optical wavele…