Palomar Testbed Interferometer

Palomar Testbed Interferometer

The Palomar Testbed Interferometer is a near-IR, long-baseline stellar interferometer located at Palomar Observatory in north San Diego County. It was built by Caltech/JPL and is intended to serve as a testbed for developing interferometric techniques to be used at the Keck Interferometer. It began operations in 1995 and acheieved routine operations in 1998, producing more than 35 refereed papers in a variety of scientific journals covering topics from high precision astrometry to stellar masses, stellar diameters and shapes.

PTI is notable for being equipped with a "dual-star" system, making it possible to simultaneously observe pairs of stars; this cancels some of the atmospheric effects of astronomical seeing and makes very high precision measurements possible.

A groundbreaking study with the Palomar Testbed Interferometer [cite journal
author=G. van Belle "et al"
title=Altair's Oblateness and Rotation Velocity from Long-Baseline Interferometry
journal=Astrophysical Journal
year=2001 | volume=559 | pages=1155
url=http://adsabs.harvard.edu/abs/2001ApJ...559.1155V
accessdate=2008-07-29
] revealed that the star Altair is not spherical, but is rather flattened at the poles due to its high rate of rotation.

External links

* [http://msc.caltech.edu/missions/Palomar/ Palomar Testbed Interferometer (PTI)] on the internet

References


Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • Palomar Testbed Interferometer — 33.356388888889 116.8657Koordinaten: 33° 21′ 23″ N, 116° 51′ 54″ W …   Deutsch Wikipedia

  • Palomar Observatory — Organization Caltech …   Wikipedia

  • Palomar-Observatorium — 33.356388888889 116.865 Koordinaten: 33° 21′ 23″ N, 116° 51′ 54″ W …   Deutsch Wikipedia

  • Palomar Observatory — Observatoire du Mont Palomar Observatoire du Mont Palomar Propriétaire Caltech Localisation Comté de San Diego, Californie, USA Coordonnées …   Wikipédia en Français

  • Mount-Palomar-Observatorium — 33.356388888889 116.8657Koordinaten: 33° 21′ 23″ N, 116° 51′ 54″ W …   Deutsch Wikipedia

  • Mount Palomar — 33.356388888889 116.8657Koordinaten: 33° 21′ 23″ N, 116° 51′ 54″ W …   Deutsch Wikipedia

  • Mount Palomar-Observatorium — 33.356388888889 116.8657Koordinaten: 33° 21′ 23″ N, 116° 51′ 54″ W …   Deutsch Wikipedia

  • Mt. Palomar — 33.356388888889 116.8657Koordinaten: 33° 21′ 23″ N, 116° 51′ 54″ W …   Deutsch Wikipedia

  • Astronomical interferometer — An astronomical interferometer is an array of telescopes or mirror segments acting together to probe structures with higher resolution. Astronomical interferometers are widely used for optical astronomy, infrared astronomy, submillimetre… …   Wikipedia

  • Mont Palomar — Observatoire du Mont Palomar Observatoire du Mont Palomar Propriétaire Caltech Localisation Comté de San Diego, Californie, USA Coordonnées …   Wikipédia en Français

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”