5 papers
Alpha Cygni Variables as Seen from the Transiting Exoplanet Survey Satellite
Joyce A. Guzik, Claire Whitley, Nova Moore +2
The Alpha Cygni (ACYG) variables are blue-white supergiants which display low-amplitude brightness variations of around 0.1 magnitude. The prototype Deneb shows quasi-periodic vari…
Convective shells in the interior of Cepheid variable stars: overshooting models based on hydrodynamic simulations
Maxime Stuck, Jane Pratt, Isabelle Baraffe +5
Because Cepheid variable stars have long been used as a cosmic benchmark, the accuracy of stellar evolution models for Cepheids have wide-reaching effects. Our goal is to provide a…
Abrupt Pulsation Resumptions in Deneb: An Update
Joyce A. Guzik, Brian Kloppenborg, Noel Richardson +4
Deneb, the prototype Alpha Cygni variable, is a bright A2 Ia supergiant which shows irregular variability with a 12-day quasi-period, presumed to be caused by pulsations. At the 20…
Deneb and the alpha Cygni Variables
Joyce A. Guzik, Brian Kloppenborg, Jason Jackiewicz
Deneb, the prototype alpha Cygni variable, is a blue-white supergiant that shows irregular variability with quasi-period around 12 days in brightness and radial velocity. Abt et al…
Abrupt Periodic Pulsation Resumptions in Deneb
Joyce A. Guzik, Helmut A. Abt, Jason Jackiewicz +1
Deneb (alpha Cygni) is a bright (V magnitude 1.25) blue-white supergiant (spectral type A2 Ia) which shows variability in both radial velocity and photometric measurements. H. Abt…