62 citations · 158 across the 5 of their papers we have counts for
5 papers
Blue Loops, Cepheids, and Forays into Axions
Kaleb Anderson, Thomas C. Gehrman, Pearl Sandick +3
The blue loop stage of intermediate mass stars has been called a "magnifying glass", where even seemingly small effects in prior stages of evolution, as well as assumptions about s…
Recycled Dark Matter
Thomas C. Gehrman, Barmak Shams Es Haghi, Kuver Sinha +1
We outline a new production mechanism for dark matter that we dub "recycling": dark sector particles are kinematically trapped in the false vacuum during a dark phase transition; t…
The Primordial Black Holes that Disappeared: Connections to Dark Matter and MHz-GHz Gravitational Waves
Thomas C. Gehrman, Barmak Shams Es Haghi, Kuver Sinha +1
In the post-LIGO era, there has been a lot of focus on primordial black holes (PBHs) heavier than g as potential dark matter (DM) candidates. We point out that the br…
Baryogenesis, Primordial Black Holes and MHz-GHz Gravitational Waves
Thomas C. Gehrman, Barmak Shams Es Haghi, Kuver Sinha +1
Gravitational waves (GWs) in the MHz - GHz frequency range are motivated by a host of early Universe phenomena such as oscillons, preheating, and cosmic strings. We point out that…
Variable Stars in Sagittarius Globular Clusters I. Arp~2
Barton J. Pritzl, Thomas C. Gehrman, Ricardo Salinas +3
We present new photometry and analysis of the twelve variable stars (nine RR Lyrae, three SX Phoenicis) belonging to the Sagittarius globular cluster Arp 2. Of the nine RR Lyrae st…