117 citations · 191 across the 8 of their papers we have counts for
5 papers · 1 filter
Axion Constraints from White Dwarf Cooling in 47 Tucanae
Leesa Fleury, Alysa Obertas, Harvey Richer +1
We analyse the cooling of white dwarfs in the globular cluster 47 Tucanae to look for evidence of axion emission affecting the rate of white dwarf cooling. If axions exist and coup…
The Cooling of Old White Dwarfs in 47 Tucanae
Leesa Fleury, Harvey Richer, Jeremy Heyl
We analyse the cooling of white dwarfs in the globular cluster 47 Tucanae (47 Tuc) using deep observations from the Hubble Space Telescope that resolve the white dwarf cooling sequ…
The origin of ultramassive white dwarfs: hints from Gaia EDR3
Leesa Fleury, Ilaria Caiazzo, Jeremy Heyl
Gaia Data Release 2 revealed a population of ultramassive white dwarfs on the Q branch that are moving anomalously fast for a local disc population with their young photometric age…
The Cooling of Massive White Dwarfs from Gaia EDR3
Leesa Fleury, Ilaria Caiazzo, Jeremy Heyl
We determine the distribution of cooling ages of massive Gaia EDR3 white dwarfs identified with over 90% probability within 200 pc and with mass in the range 0.95-1.25 . U…
Intermediate-Mass Stars Become Magnetic White Dwarfs
Ilaria Caiazzo, Jeremy Heyl, Harvey Richer +8
When a star exhausts its nuclear fuel, it either explodes as a supernova or more quiescently becomes a white dwarf, an object about half the mass of our Sun with a radius of about…