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Delayed Stellar Mass Assembly in the Low Surface Brightness Dwarf Galaxy KDG215
John M. Cannon, Zili Shen, Kristen B. W. McQuinn +17
We present HI spectral line and optical broadband images of the nearby low surface brightness dwarf galaxy KDG215. The HI images, acquired with the Karl G. Jansky Very Large Array…
Formation Timescales for High-Mass X-ray Binaries in M33
Kristen Garofali, Benjamin F. Williams, Tristan Hillis +4
We have identified 55 candidate high-mass X-ray binaries (HMXBs) in M33 using available archival {\it HST} and {\it Chandra} imaging to find blue stars associated with X-ray positi…
Types of Linkage of Quadratic Pfister Forms
Adam Chapman, Andrew Dolphin
Given a field of positive characteristic , and , we prove that if the symbols and in $H_p^n(…
Age Determinations of the Hyades, Praesepe, and Pleiades via MESA Models with Rotation
Seth Gossage, Charlie Conroy, Aaron Dotter +4
The Hyades, Praesepe, and Pleiades are well studied stellar clusters that anchor important secondary stellar age indicators. Recent studies have shown that main sequence turn off-b…
A Complete Census of Luminous Stellar Variability on Day to Decade Timescales
Charlie Conroy, Jay Strader, Pieter van Dokkum +6
Stellar photometric variability offers a novel probe of the interior structure and evolutionary state of stars. Here we present a census of stellar variability on day to decade tim…
Constraints for the Progenitor Masses of Historic Core-Collapse Supernovae
Benjamin F. Williams, Tristan J. Hillis, Jeremiah W. Murphy +3
We age-date the stellar populations associated with 12 historic nearby core-collapse supernovae (CCSNe) and 2 supernova impostors, and from these ages, we infer their initial masse…