3 papers
astro-ph.SR2024
A Comprehensive Study of the Dust Declines in R Coronae Borealis Stars
Courtney L. Crawford, Jamie Soon, Geoffrey C. Clayton +4
The R Coronae Borealis (RCB) variables are rare, hydrogen-deficient, carbon-rich supergiants known for large, erratic declines in brightness due to dust formation. Recently, the nu…
astro-ph.SR2023
HdC and EHe stars through the prism of Gaia DR3: 3D distribution and Gaia's chromatic PSF effects
P. Tisserand, C. L. Crawford, J. Soon +3
Upon its release the Gaia DR3 catalogue has led to tremendous progress in multiple fields of astronomy by providing the complete astrometric solution for nearly 1.5 billion sources…
astro-ph.SR2023
HdC and EHe stars through the prism of Gaia DR3: Evolution of RV amplitude and dust formation rate with effective temperature
P. Tisserand, C. L. Crawford, J. Soon +3
The Gaia DR3 release includes heliocentric radial velocity measurements and velocity variability indices for tens of millions of stars observed over 34 months.In this study, we uti…