Astronomy and Astrophysics, volume 448, 171-180 (2006/3-2)
Probable member stars of the gravitational theory-testing globular clusters AM 1, Pal 3 and Pal 14.
Abstract (from CDS):
Some of the Galactic outer halo globular clusters are excellent tools to probe gravitational theories in the regime of weak accelerations. The measurement of the line-of-sight velocity dispersion among stars in these clusters will differentiate between the validity of Newtonian dynamics (low velocity dispersion) and the possiblity of modified Newtonian dynamics (MOND) or dark matter dominated globular clusters (high velocity dispersion). In this paper, the properties of probable member stars of the three best-case gravitational theory-testing clusters AM1, Pal3 and Pal14 are presented. The member selection is based on VLT photometry in Johnson BV. The positions of the stars were determined with an accuracy of the order of ≤0.2", allowing their direct use for follow-up spectroscopy. The distance, reddening, age and metallicities of the clusters were estimated from isochrone fitting. Furthermore, improved structural parameters, like central coordinates, ellipticity, half-light radius, King model core and tidal radius, are presented.
Galaxy: globular clusters: individual: AM1 - Galaxy: globular clusters: individual: Pal3 - Galaxy: globular clusters: individual: Pal14 - astrometry - Galaxy: kinematics and dynamics
VizieR on-line data:
<Available at CDS (J/A+A/448/171): tablea1.dat tablea2.dat tablea3.dat>
Table A1: Cl* AM 1 H NNN (Nos 1-160). Table A2: Cl* Palomar 3 H NNN (Nos 1-153). Table A3: Cl* Palomar 14 H NNN (Nos 1-143).
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