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Eclipsing binaries as accurate distance indicators to nearby galaxies |
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| Authors: | A Giménez J V Clausen E F Guinan F P Maloney D H Bradstreet J Storm W Tobin |
| Institution: | (1) INTA/LAEFF, Apartado 50727, Madrid, Spain;(2) Copenhagen University Observatory, Brorfeldvej 23, DK-4340 Tollose, Denmark;(3) Department of Astronomy & Astrophysics, Villanova University, 19085 Villanova, PA, USA;(4) Physical Sciences Department, Eastern College, 19087 St Davids, PA, USA;(5) European Southern Observatory, Santiago, Chile;(6) Department of Physics & Astronomy, University of Canterbury, Private Bag 4800, Christchurch, NZ |
| Abstract: | We discuss the potential for using extragalactic eclipsing binaries with well-determined physical properties as standard candles to improve the extragalactic distance scale. The advent of high quantum efficiency/low noise CCDs has now made it possible to obtain high precision light and radial velocity curves for the more luminous OB-type eclipsing binaries in the Magellanic Clouds with even small to moderate size (1–2m) telescopes. This can lead to the determination of distance moduli (m-M)0 to the LMC and SMC with precisions of about 0m.15 for individual binaries.These distances are essentially free from the assumptions made using other distance indicators. |
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