Studies of the open cluster M11. 4. The CM diagram, luminosity function and mass segregation.

Details Studies of the open cluster M11. 4. The CM diagram, luminosity function and mass segregation. Studies of the open cluster M11. 4. The CM diagram, luminosity function and mass segregation.

Jun 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997cha%26a..21..212c&link_type=abstract

Chin. Astron. Astrophys., Vol. 21, No. 2, p. 212 - 220

Astronomy and Astrophysics

Astrophysics

Open Clusters: C-M Diagrams, Open Clusters: Luminosity Function

Scientific paper

Using the relative proper motions and membership probabilities of 785 stars in the region of the open cluster M11 the authors found for the cluster, a distance of 1659 pc, and an age of (1.8 - 2.2)×108yr, a radius of about 24.5 pc, a luminosity mass of 4354 Msun, and a virial mass of 5000 Msun. A method is proposed to derive the present-day luminosity function from the observed luminosity function. The analysis shows that the cluster stars show quite a clear mass segregation effect in space and that while mass segregation in the velocities does exist, it is not so obvious.

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