119 citations · 1.1k across the 28 of their papers we have counts for
28 papers
Variability in Protoplanetary Nebulae: X. Multi-year Periods as an Indicator of Potential Binaries
Bruce J. Hrivnak, Wenxian Lu, Gary Henson +1
New observations are presented of four evolved objects that display long, multi-year variations in their light curves. These are interpreted as good evidence of their binary nature…
Probing invisible dark photon models via atmospheric collisions
Mingxuan Du, Rundong Fang, Zuowei Liu +2
Atmospheric collisions can copiously produce dark sector particles in the invisible dark photon model, leading to detectable signals in underground neutrino detectors. We consider…
Variability in Protoplanetary Nebulae: IX. Evidence for Evolution in a Decade
Bruce J. Hrivnak, Wenxian Lu, William C. Bakke +1
We have carried out a new photometric V,Rc study of 12 protoplanetary nebulae, objects in the short-lived transition between the AGB and PN phases of stellar evolution. These had b…
Variability in Proto-Planetary Nebulae: VIII. A New Sample of Southern Hemisphere Objects
Bruce J. Hrivnak, Gary Henson, Todd C. Hillwig +5
As part of our continuing study of light variability in proto-planetary nebulae (PPNe), we present the results from a long-term study of nine southern hemisphere objects. We have m…
Variability in Proto-Planetary Nebulae: VII. Light Curve Studies of Five Medium-bright, Oxygen-rich or Mixed-chemistry Post-AGB/Post-RGB Objects
Bruce J. Hrivnak, Gary Henson, Todd C. Hillwig +3
We have monitored over a ten-year interval the light variations of five evolved stars with very large mid-infrared excesses. All five objects appear to have oxygen-rich or mixed ox…
Variability in Proto-Planetary Nebulae: VI. Multi-Telescope Light Curves Studies of Several Medium-Bright (V=13-15), Carbon-Rich Objects
Bruce J. Hrivnak, Gary Henson, Todd C. Hillwig +3
We present ten years of new photometric monitoring of the light variability of five evolved stars with strong mid-infrared emission from surrounding dust. Three are known carbon-ri…