Stellar Kinematics in M15

Details Stellar Kinematics in M15 Stellar Kinematics in M15

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...199.5610g&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #56.10; Bulletin of the American Astronomical Society, Vol. 33, p.1385

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We are obtaining stellar absorption line spectra with STIS to measure the radial velocities of individual stars in the crowded central two arcsec of M15. The central power-law cusp observed in the star count distribution provides a unique opportunity to probe the structure and evolution of this globular cluster. The kinematics of the individual stars will reveal whether the observed cusp is consistent with core collapse or whether it is indicative of an intermediate-mass black hole. Initial results show that the few stars that have ground-based radial velocity measurements agree well with the STIS results, and that the STIS measurements will significantly increase the overall number of stars with known radial velocities in the central few arcsec of M15

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