The luminosity function of Praesepe. I - A proper motion and photometric search for candidate members

Astronomy and Astrophysics – Astronomy

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Open Clusters, Stellar Luminosity, Stellar Motions, Stellar Spectra, Stellar Spectrophotometry, Halos, Massive Stars, Sky Surveys (Astronomy)

Scientific paper

Proper motions have been measured for a color selected sample of stars in a square 4 x 4 deg region centered on the Praesepe open cluster. The magnitude limit of the photometry is about 19 and of the proper motions about 18. A list is presented of 765 probable and possible members from 9 to 18 based on the proper motions, magnitudes, and colors. The results are compared with other proper motion surveys, and a preliminary luminosity function of M(v) = 11 is calculated.

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