11 papers
The Astronomy of Halakhic Nightfall: Calculating Ts'eit HaKokhavim and Motsa'ei Shabbat
Aster G. Taylor
In Jewish tradition, the boundary between days is not midnight, but nightfall. Nightfall is when one must pray ma'ariv, count the omer, and may engage in activity after Shabbat. Wh…
The Effects of Magnetic Accretion on the Spatial Extent of White Dwarf Pollution
Dang Pham, Aster G. Taylor, Tim Cunningham
Many white dwarfs are polluted by metals, which are generally understood to be the accreted remnants of a planetary system. Modeling these systems typically assumes that the metal…
A Retrieval Framework for Observationally Constraining the Parameters of Circumplanetary Disks
Aster Taylor, Fred Adams
As they form, giant planets are surrounded by disks of gas and dust sourced from the background circumstellar disk. Although there have been few detections to date, upcoming instru…
Potential Thermal Profiles of The Third Interstellar Object 3I/ATLAS
Atsuhiro Yaginuma, Aster G. Taylor, Darryl Z. Seligman
We investigate the thermal evolution of 3I/ATLAS, the third macroscopic interstellar object discovered on 2025 July 1. By comparing modeled thermal profiles with observations of vo…
The Two-Dimensional Structure of Circumplanetary Disks and their Radiative Signatures
Aster G. Taylor, Fred C. Adams, Nuria Calvet
During their formative stages, giant planets are fed by infalling material sourced from the background circumstellar disk. Due to conservation of angular momentum, the incoming gas…
Onset of CN Emission in 3I/ATLAS: Evidence for Strong Carbon-Chain Depletion
Luis E. Salazar Manzano, Hsing Wen Lin, Aster G. Taylor +6
Interstellar objects provide a direct window into the environmental conditions around stars other than the Sun. The recent discovery of 3I/ATLAS, a new interstellar comet, offers a…