Browsing by Author "e066cbaf-7092-43a6-b802-9c06c44d1663"

Now showing items 1-3 of 3

    • An updated 2017 astrometric solution for betelgeuse 
      Harper, G. M.; Brown, A.; Guinan, E. F.; O’Gorman, E.; Richards, A. M. S.; Kervella, P.; Decin, L. (IOP Publishing, 2017)
      We provide an update for the astrometric solution for the Type II supernova progenitor Betelgeuse using the revised Hipparcos Intermediate Astrometric Data (HIAD) of van Leeuwen, combined with existing VLA and new e-MERLIN ...
    • Study of the inner dust envelope and stellar photosphere of the AGB star R Doradus using SPHERE/ZIMPOL 
      Khouri, T.; Maercker, M.; Waters, L. B. F. M.; Vlemmings, Wouter H. T.; Kervella, Pierre; de Koter, A.; Ginski, C.; De Beck, E.; Decin, Leen; Min, M.; Dominik, Carsten; O'Gorman, E.; Schmid, H. M.; Lombaert, R.; Lagadec, E. (EDP Sciences, 2016)
      Context. On the asymptotic giant branch (AGB) low-and intermediate-mass stars eject a large fraction of their envelope, but the mechanism driving these outflows is still poorly understood. For oxygen-rich AGB stars, the ...
    • The inhomogeneous submillimeter atmosphere of Betelgeuse 
      O'Gorman, E.; Kervella, P.; Harper, G. M.; Richards, A. M. S.; Decin, L.; Montarges, M.; McDonald, I. (EDP Sciences, 2017)
      The mechanisms responsible for heating the extended atmospheres of early-M spectral-type supergiants are poorly understood. So too is the subsequent role these mechanisms play in driving the large mass-loss rates of these ...