77 citations · 139 across the 9 of their papers we have counts for
5 papers · 1 filter
Yellow hypergiant V509 Cas -- stable in the 'yellow void'
A. Kasikov, I. Kolka, A. Aret +2
The yellow hypergiant star V509 Cas is currently undergoing an extreme phase of evolution. Having experienced eruptive mass-loss outbursts in the 20th century, the star's effective…
V838 Mon: A slow waking up of Sleeping Beauty?
T. Liimets, I. Kolka, M. Kraus +15
Context. V838 Monocerotis is a peculiar binary that underwent an immense stellar explosion in 2002, leaving behind an expanding cool supergiant and a hot B3V companion. Five years…
Variability survey of brightest stars in selected OB associations
Jaan Laur, Indrek Kolka, Tõnis Eenmäe +2
The stellar evolution theory of massive stars remains uncalibrated with high-precision photometric observational data mainly due to a small number of luminous stars that are monito…
Period change of massive binaries from combined photometric and spectroscopic data in Cygnus OB2
Jaan Laur, Elmo Tempel, Taavi Tuvikene +2
Context. Mass loss is an important property in evolution models of massive stars. As up to 90% of the massive stars have a visual or spectroscopic companion and many of them exhibi…
The planetary nebula IPHASXJ211420.0+434136 (Ou5): insights into common-envelope dynamical and chemical evolution
R. L. M. Corradi, P. Rodriguez-Gil, D. Jones +7
While analysing the images of the IPHAS H survey, we noticed that the central star of the candidate planetary nebula IPHASXJ211420.0+434136 (also named Ou5) was clearly variable…