Searching for Low Mass Stars: the Mass Function at the Hydrogen Burning Limit

Details Searching for Low Mass Stars: the Mass Function at the Hydrogen Burning Limit Searching for Low Mass Stars: the Mass Function at the Hydrogen Burning Limit

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.6113p&link_type=abstract

HST Proposal ID #6113

Computer Science

Hst Proposal Id #6113 Stellar Populations

Scientific paper

We propose to use the unprecedented imaging capabilities of the WFPC2 to investigate the low-mass Main Sequence end in five globular clusters, in order to derive the luminosity and mass functions of very low mass stars (VLM). Deep photometric observations are required through the F606W and F814W wide band filters. Among the closest clusters, five objects have been selected with the same metallicity but very different dynamical histories, different destruction times, and different scale heights. This survey will obtain a detailed map of the internal properties of the clusters and, through the study of mass segregation, will gain a closer insight into the relaxation mechanisms that govern their evolution and into the effects of dynamics on stellar evolution. A thorough intercomparison of the luminosity and mass functions of several different clusters measured at various locations inside each cluster will provide useful tests on VLM stars evolution, will deliver long awaited hints on the origin of the dark matter, and will improve the understanding of the dynamical processes at work in globular clusters. As a byproduct, several cluster white dwarfs will be detected and their cooling sequence will be investigated.

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