MUSE narrow field mode observations of the central kinematics of M15

Christopher Usher*, Sebastian Kamann, Mark Gieles, Vincent Hénault-Brunet, Emanuele Dalessandro, Eduardo Balbinot, Antonio Sollima

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)
25 Downloads (Pure)


We present observations of the stellar kinematics of the centre of the core collapsed globular cluster M15 obtained with the MUSE integral field spectrograph on the Very Large Telescope operating in narrow field mode. Thanks to the use of adaptive optics, we obtain a spatial resolution of 0.1 arcsec and are able to reliably measure the radial velocities of 864 stars within 8 arcsec of the centre of M15, thus providing the largest sample of radial velocities ever obtained for the innermost regions of this system. Combined with previous observations of M15 using MUSE in wide field mode and literature data, we find that the central kinematics of M15 are complex with the rotation axis of the core of M15 offset from the rotation axis of the bulk of the cluster. While this complexity has been suggested by previous work, we confirm it at higher significance and in more detail.
Original languageEnglish
Pages (from-to)1680-1687
Number of pages8
JournalMonthly Notices of the Royal Astronomical Society
Publication statusPublished - 1-May-2021


  • stars: kinematics and dynamics
  • globular clusters: individual: NGC 7078 (M15)
  • Astrophysics - Astrophysics of Galaxies

Cite this