253 citations · 840 across the 9 of their papers we have counts for
5 papers · 1 filter
How many Hipparcos Variability-Induced Movers are genuine binaries?
D. Pourbaix, I. Platais, S. Detournay +3
Hipparcos observations of some variable stars, and especially of long-period (e.g. Mira) variables, reveal a motion of the photocenter correlated with the brightness variation ({va…
Reprocessing the Hipparcos data for evolved giant stars II. Absolute magnitudes for the R-type carbon stars
G. R. Knapp, D. Pourbaix, A. Jorissen
The Hipparcos Intermediate Astrometric Data for carbon stars have been reprocessed using an algorithm which provides an objective criterion for rejecting anomalous data points and…
Multiple Molecular Winds in Evolved Stars I. A Survey of CO(2-1) and CO(3-2) Emission from 45 Nearby AGB Stars
G. R. Knapp, K. Young, E. Lee +1
This paper describes observations of a new phenomenon in evolved mass-losing AGB stars: the presence of two winds with different expansion velocities. CO(2-1) and CO(3-2) line emis…
Circumstellar shells and mass loss rates: Clues to the evolution of S stars
A. Jorissen, G. R. Knapp
It is the purpose of this paper to rediscuss the circumstellar properties of S stars and to put these properties in perspective with our current understanding of the evolutionary s…
Maps of the Molecular Emission Around 18 Evolved Stars
K. Z. Stanek, G. R. Knapp, K. Young +1
We present maps at resolution of the molecular emission around 18 evolved stars (14~asymptotic giant branch stars, one supergiant, two proto-planetary nebulae and one planet…