Zobrazeno 1 - 10
of 190
pro vyhledávání: '"Schwan, H. P."'
Aims: We build a catalogue PPM-Extended (PPMX) on the ICRS system which is complete down to a well-defined limiting magnitude and contains the best presently available proper motions to be suited for kinematical studies in the Galaxy. Methods: We per
Externí odkaz:
http://arxiv.org/abs/0806.1009
The combination of ground-based astrometric compilation catalogues, such as the FK5 or the GC, with the results of the ESA Astrometric Satellite HIPPARCOS produces for many thousands of stars proper motions which are significantly more accurate than
Externí odkaz:
http://arxiv.org/abs/astro-ph/0007262
We derive the astrometric orbit of the photo-center of the close pair alpha UMi AP (=alpha UMi Aa) of the Polaris multiple stellar system. The orbit is based on the spectroscopic orbit of the Cepheid alpha UMi A (orbital period of AP: 29.59 years), a
Externí odkaz:
http://arxiv.org/abs/astro-ph/0002406
We present a method which provides some information on the possible binary nature on an appararently single star. The method compares the instantaneously measured HIPPARCOS proper motion with the long-term averaged, ground-based proper motion or with
Externí odkaz:
http://arxiv.org/abs/astro-ph/9901228
The combination of ground-based astrometric compilation catalogues, such as the FK5 or the GC, with the results of the ESA Astrometric Satellite HIPPARCOS produces for many thousands of stars proper motions which are significantly more accurate than
Externí odkaz:
http://arxiv.org/abs/astro-ph/9812472
The Sixth Catalogue of Fundamental Stars (FK6) combines the ground-based astrometric data of the basic fundamental stars, obtained over more than two centuries and summarized in the FK5, with the observations of the HIPPARCOS astrometry satellite. Th
Externí odkaz:
http://arxiv.org/abs/astro-ph/9807301
The combination of HIPPARCOS measurements with suitable ground-based astrometric data improves significantly the accuracy of the proper motions of bright stars. The comparison of both types of data allows us also to identify and to eliminate, at leas
Externí odkaz:
http://arxiv.org/abs/astro-ph/9807284
Publikováno v:
The Journal of Biophysical and Biochemical Cytology, 1960 Jul 01. 7(4), 589-601.
Externí odkaz:
https://www.jstor.org/stable/1603476
Publikováno v:
Science, 1975 Jan . 187(4174), 357-359.
Externí odkaz:
https://www.jstor.org/stable/1739382
Autor:
Schwan, H. P., Carstensen, E. L.
Publikováno v:
Science, 1957 May . 125(3255), 985-986.
Externí odkaz:
https://www.jstor.org/stable/1753900