Astrometry with the Keck-Interferometer: the ASTRA project and its science
| Autor: | T. Panteleeva, Bill Randolph, D. Morrison, James R. Graham, M. Mark Colavita, Rachel Akeson, Drew Medeiros, K. Summers, B. C. Berkey, Josh A. Eisner, C. Tyau, Kevin Tsubota, Michael Hrynewych, Andrew Cooper, John D. Monnier, Andrea M. Ghez, Lynne A. Hillenbrand, B. Smith, Jörg-Uwe Pott, Rafael Millan-Gabet, Julien Woillez, Ed Wetherell, Nevin N. Weinberg, Eliot Quataert, Peter Wizinowich |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Physics
Milky Way Astrophysics (astro-ph) Astrophysics::Instrumentation and Methods for Astrophysics FOS: Physical sciences Astronomy Astronomy and Astrophysics Astrometry Astrophysics ASTRA Black hole Stars Interferometry Upgrade Space and Planetary Science Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Astrophysics::Galaxy Astrophysics |
| Popis: | The sensitivity and astrometry upgrade ASTRA of the Keck Interferometer is introduced. After a brief overview of the underlying interferometric principles, the technology and concepts of the upgrade are presented. The interferometric dual-field technology of ASTRA will provide the KI with the means to observe two objects simultaneously, and measure the distance between them with a precision eventually better than 100 uas. This astrometric functionality of ASTRA will add a unique observing tool to fields of astrophysical research as diverse as exo-planetary kinematics, binary astrometry, and the investigation of stars accelerated by the massive black hole in the center of the Milky Way as discussed in this contribution. 22 pages, 10 figures (low resolution), contribution to the summerschool "Astrometry and Imaging with the Very Large Telescope Interferometer", 2 - 13 June, 2008, Keszthely, Hungary, corrected authorlist |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|