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

doi:10.1093/mnras/stab565

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

Astronomy

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Abstract

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 language	English
Pages (from-to)	1680-1687
Number of pages	8
Journal	Monthly Notices of the Royal Astronomical Society
Volume	503
DOIs	https://doi.org/10.1093/mnras/stab565
Publication status	Published - 1-May-2021

Keywords

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

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10.1093/mnras/stab565

MUSE narrow field mode observations of the central kinematics of M15Final publisher's version, 1.51 MBLicence: Unspecified

https://ui.adsabs.harvard.edu/abs/2021MNRAS.503.1680U

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Cite this

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title = "MUSE narrow field mode observations of the central kinematics of M15",

abstract = "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.",

keywords = "stars: kinematics and dynamics, globular clusters: individual: NGC 7078 (M15), Astrophysics - Astrophysics of Galaxies",

author = "Christopher Usher and Sebastian Kamann and Mark Gieles and Vincent H{\'e}nault-Brunet and Emanuele Dalessandro and Eduardo Balbinot and Antonio Sollima",

year = "2021",

month = may,

day = "1",

doi = "10.1093/mnras/stab565",

language = "English",

volume = "503",

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TY - JOUR

T1 - MUSE narrow field mode observations of the central kinematics of M15

AU - Usher, Christopher

AU - Kamann, Sebastian

AU - Gieles, Mark

AU - Hénault-Brunet, Vincent

AU - Dalessandro, Emanuele

AU - Balbinot, Eduardo

AU - Sollima, Antonio

PY - 2021/5/1

Y1 - 2021/5/1

N2 - 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.

AB - 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.

KW - stars: kinematics and dynamics

KW - globular clusters: individual: NGC 7078 (M15)

KW - Astrophysics - Astrophysics of Galaxies

U2 - 10.1093/mnras/stab565

DO - 10.1093/mnras/stab565

M3 - Article

SN - 0035-8711

VL - 503

SP - 1680

EP - 1687

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

ER -