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Spatial Structure of Star Clusters by the 2MASS Database

Published online by Cambridge University Press:  12 April 2016

J.W. Chen  and
W.P. Chen
J.W. Chen
Affiliation:
Institute of Astronomy, National Central University, Chung-Li 32054, Taiwan, Email: m899008@astro.ncu.edu.tw
W.P. Chen
Affiliation:
Institute of Astronomy, National Central University, Chung-Li 32054, Taiwan, Email: m899008@astro.ncu.edu.tw

Abstract

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We present some results of a pilot program to study star clusters with the Two-Micron All-Sky Survey (2MASS) observations. While 2MASS cannot resolve the cores or detect much of the main sequence of globular clusters, the homogeneity and large angular coverages make the database suitable to study young star clusters. We show that member stars are centrally concentrated in open clusters, with a density distribution markedly shallower than that for globular clusters. In NGC2506 (age 3 Gyr) giant stars appear to occupy a smaller region than main sequence stars—a natural consequence of mass segregation.

Type
VII. Science With Small Telescopes
Information
International Astronomical Union Colloquium , Volume 183: Small-Telescope Astronomy on Global Scales , 2001 , pp. 331 - 332
Copyright
Copyright © Astronomical Society of the Pacific 2001

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