4 papers
A Parsec-scale Circumstellar Shell Around VX Sgr: Mass Loss and RSG/TŻO Nature
Julian Shapiro
A thin, arc-shaped shell is discovered surrounding VX Sagittarii (VX Sgr), the largest known CSM shell around an RSG at a scale . The nebula has an extincti…
CHASE Spectral Survey I: Measuring Contamination in the Color-selected J-region Asymptotic Giant Branch Distance Indicator
Siyang Li, Alexei V. Filippenko, Arief Ahmad +11
The J-region asymptotic giant branch (JAGB) method for distance measurements uses the near uniform luminosity of carbon-rich AGB stars as a standard candle. Its application rests o…
Discovery of Optical Filaments in the North Polar Spur/eROSITA Bubble
Julian Shapiro
I report the discovery of optical filaments in H, [O III], and [S II], coincident with structure, associated with the North Polar Spur (NPS) region of the eR…
Discovery of Isolated, Quenched Candidate Backsplash Dwarf Galaxies near M101
Julian Shapiro
I report the discovery of three faint, semi-resolved quiescent candidate dwarf galaxies, which are potential backsplash galaxies associated with the nearby spiral M101 ($D \sim 6.7…