It can also be used for non-astronomical data as well. Its aim is to provide most of facilities that astronomers need to analysis and manipulation of source catalogs and other tables. TOPCAT is an interactive graphical viewer and editor for tabular data. Most of the analysis is done using the help of software TOPCAT which is described below The data is collected from Gaia archive query search where we chose the parameters we need. The 1.7 billion source catalog of Gaia DR2 is unprecedented form for an astronomical datasheet in term of sheer size, high dimensionality and astrometric precision and accuracy. Gaia is successor to Hipparcos mission and telescope is part of ESA's Horizon 2000+ long term scientific program. The data about star cluster which has been analysed is collected from source catalog GAIA DR2. The section answers how the data was collected and how it was analyzed. The basic information or literature about Pleiades cluster is taken from GAIA DR2 and its article is found to be on /aa/abs/2018/08/aa32843-18. HERE I HAVE CHOOSEN PLEIADES STAR CLUSTER TO CARRY OUT AND LEARN ASTROMETRY LITERATURE REVIEW Information →To study about magnitude of stars, telescope and brief introduction to photometry →To fit isochrone to find age, metallicity and extinction of cluster. →To determine parallax and distance to the stars under limit of error. →To identify members with proper motion analysis. Also to study about basic of astronomy and astrophysics which include magnitude of stars, telescope, brief introduction to photometry etc. The objective of this report is to learn astrometry of stars clusters data provided by Gaia and determine fundamental astrometrical parameters of stars cluster. are some open star cluster.įig 6 Space velocity and its component Objectives of the Project They are loosely bound by mutual gravitational attraction and become disrupted by the close encounters with other cluster and clouds of gas as they orbit the galactic centre. Open star clusters are group of star cluster up to few thousand stars that were formed by same giant molecular cloud and have roughly same age. CMD and Isochrone fiting is done to find out ages of star cluster. One of most fundamental technique for the distance measurement is determination of parallax. Measurement of distance of astronomical object not only tells how that object is far from us but using distance we can predict luminosity of the object, masses of object from orbital motion, physical size of an object, true motion through stars etc. To measure distance of an astronomical object is one of the interesting and challenging subject of astrometry. The aim of this project to study about star clusters mainly open star clusters and derive their astrometric parameters from the data provided by GAIA DR2 using software TOPCAT. Global Astrometric Interferometer for AstrophysicsĪstronomy, one of the oldest branch of science, deals with the celestial objects, space and the physical universe as whole whereas Astrophysics is branch of astronomy concerned with physical nature of stars and other celestial bodies and the application of laws and theories of physics to the interpretation of astronomical observations.
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