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Bessel Smart Van Der Kamp YTPC HIP YTPC HIP SIM.

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Presentation on theme: "Bessel Smart Van Der Kamp YTPC HIP YTPC HIP SIM."— Presentation transcript:

1

2 Bessel Smart Van Der Kamp YTPC

3 HIP

4 YTPC HIP SIM

5 YTPC HIP SIM GAIA

6 SIM HIP/YTPC YTPC HIP SIM GAIA

7 NEARBY NEIGHBOURS GAIA/SIM WON’T SEE Ricky Smart, Beatrice Bucciarelli, Mario Lattanzi, Hugh Jones. OATo – U.Herts

8 Richard SmartIAU L + T Dwarfs Complex Mass-Luminosty-Metalicity-Age relation Same spectral type different luminosity or mass e.g. 0.05M start life as M, 0.1-1GYR L, finishes as a T Distances: luminosity, large numbers  LF assume a radius -> effective tempreature large velocities or low luminosity => sub-dwarfs over luminous => binary

9 Richard SmartIAU from 5/10/2007www.dwarfarchives.org Known L+T Dwarfs

10 Richard SmartIAU DISTANCES + MAGNITUDES Literature z,i or spt+J -> z,i (Hawley et al 2002) Transform z,i to GAIA-G (internal OATo) Calculate a spectro-photometric distance SIM fainter but works bluer…

11 Richard SmartIAU All L+T dwarfs within 50pcs.

12 Richard SmartIAU Those seen by GAIA.


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