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Praesepe: old (~600Myr), nearby(190pc), metal rich ([Fe/H]=0.27) ‏

The stellar and substellar population in the old open cluster Praesepe revealed by the Large Binocular Telescope W. Wang 1 , S. Boudreault 1 , C.A.L. Bailer-Jones 1 , B. Goldman 1 , Th.Henning 1 , J. Caballero 2 ‏ (1) MPIA (2) UCM.

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Praesepe: old (~600Myr), nearby(190pc), metal rich ([Fe/H]=0.27) ‏

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  1. The stellar and substellar population in the old open cluster Praesepe revealed by theLarge Binocular TelescopeW. Wang1, S. Boudreault1, C.A.L. Bailer-Jones1, B. Goldman1, Th.Henning1, J. Caballero2‏(1) MPIA (2) UCM • Praesepe: old (~600Myr), nearby(190pc), metal rich ([Fe/H]=0.27)‏ • A LBT/LBC deep survey in r',i',z' and Y bands in the central region, covering 44'X44'. • Observed in March, Dec. 2008 and Feb. 2009 • 5 sigma detection in r', i' and z' are 26.0, 25.5 and 24.7, reaching substellar regime of 55Mjup. • Calibration need more work

  2. The stellar and substellar population in the old open cluster Praesepe revealed by the Large Binocular Telescope W. Wang1, S. Boudreault1, C.A.L. Bailer-Jones1, B. Goldman1, Th.Henning1, J. Caballero2‏(1) MPIA (2) UCM • Praesepe: old (~600Myr), nearby(190pc), metal rich ([Fe/H]=0.27)‏ • A LBT/LBC deep survey in r',i',z' & Y bands in the central region, covering 44'X44'. • Observed in March, Dec. 2008 and Feb. 2009 • 5 sigma detection in r', i' and z' are 26.0, 25.5 and 24.7, reaching substellar regime of 55Mjup. • Calibration need more work

  3. Band Detection limit Nstars Data quality r 26.0 61030 B i 25.5 50856 A z 24.7 120330 A Y unknown 73323 B CMDs: observed + model constrainstens of BD candidates found

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