81 citations · 285 across the 9 of their papers we have counts for
5 papers · 1 filter
High resolution spectroscopy for Cepheids distance determination. III. A relation between gamma-velocities and gamma-asymmetries
N. Nardetto, A. Stoekl, D. Bersier +1
Galactic Cepheids in the vicinity of the Sun have a residual line-of-sight velocity, or gamma-velocity, which shows a systematic blueshift of about 2 km/s compared to an axisymmetr…
High resolution spectroscopy for Cepheids distance determination. II. A period- projection factor relation
N. Nardetto, D. Mourard, Ph. Mathias +2
The projection factor is a key quantity for the interferometric Baade-Wesselink (hereafter IBW) and surface-brightness (hereafter SB) methods of determining the distance of Cepheid…
Tomography of the atmosphere of long-period variable stars
A. Jorissen, M. Dedecker, B. Plez +2
This paper reviews the results obtained so far with the newly developed tomographic technique, which probes the velocity field across the atmosphere of long-period variable (LPV) s…
Envelope tomography of long-period variable stars III. Line-doubling frequency among Mira stars
R. Alvarez, A. Jorissen, B. Plez +3
This paper presents statistics of the line-doubling phenomenon in a sample of 81 long-period variable (LPV) stars of various periods, spectral types and brightness ranges. When cor…
Envelope tomography of long-period variable stars II. Method
R. Alvarez, A. Jorissen, B. Plez +3
A tomographic method is described that makes it possible to follow the propagation of shock waves across the photosphere of long-period variable stars. The method relies on the cor…