Zobrazeno 1 - 10
of 629
pro vyhledávání: '"Döllinger M"'
Autor:
Hatzes, A. P., Endl, M., Cochran, W. D., MacQueen, P. J., Han, I., Lee, B. -C., Kim, K. -M., Mkrtichian, D., Doellinger, M., Hartmann, M., Karjalainen, M., Dreizler, S.
We present precise stellar radial velocity measurements of Gamma Dra taken from 2003 to 2017. The data from 2003 to 2011 show coherent, long-lived variations with a period of 702 d. These variations are consistent with the presence of a planetary com
Externí odkaz:
http://arxiv.org/abs/1801.05239
Autor:
Hatzes, A. P., Cochran, W. D., Endl, M., Guenther, E. W., MacQueen, P., Hartmann, M., Zechmeister, M., Han, I., Lee, B. -C., Walker, G. A. H., Yang, S., Larson, A. M., Kim, K. -M., Mkrtichian, D. E., Doellinger, M., Simon, A. E., Girardi, L.
We investigate the nature of the long-period radial velocity variations in Alpha Tau first reported over 20 years ago. We analyzed precise stellar radial velocity measurements for Alpha Tau spanning over 30 years. An examination of the Halpha and Ca
Externí odkaz:
http://arxiv.org/abs/1505.03454
Autor:
Ziethe, A. *, Petermann, S. *, Hoppe, U., Greiner, N. *, Brüning, M. *, Bohr, C. *, Döllinger, M. *
Publikováno v:
In Journal of Voice November 2019 33(6):851-859
Publikováno v:
In Journal of Fluids and Structures October 2019 90:297-314
Autor:
Hatzes, A. P., Zechmeister, M., Matthews, J., Kuschnig, R., Walker, G. A. H., Doellinger, M., Guenther, D. B., Moffat, A. F. J., Rucinski, S. M., Sasselov, D.
We use precise radial velocity measurements and photometric data to derive the frequency spacing of the p-mode oscillation spectrum of the planet-hosting star Beta Gem. This spacing along with the interferometric radius for this star is used to deriv
Externí odkaz:
http://arxiv.org/abs/1205.5889
Autor:
Döllinger, M. P., Hatzes, A. P., Pasquini, L., Guenther, E. W., Hartmann, M., Setiawan, J., Girardi, L., de Medeiros, J. R., da Silva, L.
Publikováno v:
AIP Conference Proceedings, Volume 1331, pp. 79-87 (2011)
G and K giants are a class of radial velocity (RV) variables. One reason for this variability are planetary companions which are indicated in time series of stellar spectra. Since 2004 these spectra in the visual range were obtained with the high res
Externí odkaz:
http://arxiv.org/abs/1102.0499
11 UMi and HD 32518 belong to a sample of 62 K giant stars that has been observed since February 2004 using the 2m Alfred Jensch telescope of the Th\"uringer Landessternwarte (TLS) to measure precise radial velocities (RVs). The aim of this survey is
Externí odkaz:
http://arxiv.org/abs/0908.1753
For the past 3 years we have been monitoring 62 K giant stars using precise stellar radial velocity (RV) measurements with the 2m Alfred Jensch telescope of the Th\"uringer Landessternwarte Tautenburg (TLS). To probe the dependence of planet formatio
Externí odkaz:
http://arxiv.org/abs/0903.3593
Autor:
Pasquini, Luca, Doellinger, M. P., Hatzes, A., Setiawan, J., Girardi, L., da Silva, L., de Medeiros, J. R.
Planet searches around evolved giant stars are bringing new insights to planet formation theories by virtue of the broader stellar mass range of the host stars compared to the solar-type stars that have been the subject of most current planet searche
Externí odkaz:
http://arxiv.org/abs/0801.3336
Autor:
Pasquini, L., Doellinger, M. P., Weiss, A., Girardi, L., Chavero, C., Hatzes, A. P., da Silva, L., Setiawan, J.
Exo-planets are preferentially found around high metallicity main sequence stars. We aim at investigating whether evolved stars share this property, and what this tells about planet formation. Statistical tools and the basic concepts of stellar evolu
Externí odkaz:
http://arxiv.org/abs/0707.0788