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53 papers · 2 filters
Accretion funnels onto weakly magnetized young stars
N. Bessolaz, C. Zanni, J. Ferreira +2
Aims : We re-examine the conditions required to steadily deviate an accretion flow from a circumstellar disc into a magnetospheric funnel flow onto a slow rotating young forming st…
The pulsation modes of the pre-white dwarf PG 1159-035
J. E. S. Costa, S. O. Kepler, D. E. Winget +74
PG 1159-035, a pre-white dwarf with T_eff=140,000 K, is the prototype of both two classes: the PG1159 spectroscopic class and the DOV pulsating class. Previous studies of PG 1159-0…
An infrared view of (candidate accretion) disks around massive young stars
A. Bik, A. Lenorzer, W-. F. Thi +4
Near-infrared surveys of high-mass star-forming regions start to shed light onto their stellar content. A particular class of objects found in these regions, the so-called massive…
Resolving the ionized wind of the post-Red Supergiant IRC +10 420 with VLTI/AMBER
W. J. de Wit, R. D. Oudmaijer, M. A. T. Groenewegen +3
The paper investigates the milli-arcsecond scale structure of the present-day mass-loss of the post-Red Supergiant IRC+10420. We use three telescopes of the VLT Interferometer in c…
Folding ion rays in comet C/2004 Q2 (Machholz) and the connection with the solar wind
P. Degroote, D. Bodewits, M. Reyniers
The appearance of folding ion rays in cometary comae is still not very well understood, so our aim is to gain more insight into the role of the local solar wind in the formation of…
A spectroscopic study of southern (candidate) gamma Doradus stars. II. Detailed abundance analysis and fundamental parameters
H. Bruntt, P. De Cat, C. Aerts
The gamma Doradus stars are a recent class of variable main sequence F-type stars located on the red edge of the Cepheid instability strip. They pulsate in gravity modes, and this…