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Unformatted text preview: Ph 441/541 Problem Set 2 Due: Friday, February 10, 2012 1. Stars near the Sun: In this problem you will use the on-line services of the Centre de Donn ees Astronomiques de Strassbourg (CDS; Astronomical Data Center in English) to identify stars near the Sun and determine their properties. The VizieR service (http://vizier.u-strasbg.fr/viz-bin/VizieR) is an astronomical catalog database, enabling searches for and in catalogs. The Simbad service (http://simbad.u-strasbg.fr/simbad/) is a searchable database of astronomical objects, giving what is known about each. The Aladin service (http://aladin.u-strasbg.fr/aladin.gml), which we will not use in this problem, is an interactive software sky atlas that allows a user to display digitized astronomical images and overlay entries from catalogs. a. Find the new reduction (van Leeuwen 2007) of the Hipparcos catalog using VizieR by entering hip2 in the find box and hitting return (or pushing the Find button). Select The Astrometric Catalogue and push the Query selected Tables button. This will take you to a page where you can select entries from the catalog based on entered constraints....
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- Spring '12