MUSE narrow field mode observations of the central kinematics of M15. (arXiv:2102.11721v2 [astro-ph.GA] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Usher_C/0/1/0/all/0/1">Christopher Usher</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kamann_S/0/1/0/all/0/1">Sebastian Kamann</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gieles_M/0/1/0/all/0/1">Mark Gieles</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Henault_Brunet_V/0/1/0/all/0/1">Vincent Hénault-Brunet</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dalessandro_E/0/1/0/all/0/1">Emanuele Dalessandro</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Balbinot_E/0/1/0/all/0/1">Eduardo Balbinot</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sollima_A/0/1/0/all/0/1">Antonio Sollima</a>
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 VLT operating in narrow field mode. Thanks to the use of
adaptive optics, we obtain a spatial resolution of 0.1arcsec 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.
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 VLT operating in narrow field mode. Thanks to the use of
adaptive optics, we obtain a spatial resolution of 0.1arcsec 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.
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