SIMBAD references

2013MNRAS.428..389P - Mon. Not. R. Astron. Soc., 428, 389-420 (2013/January-1)

The SLUGGS survey: kinematics for over 2500 globular clusters in 12 early-type galaxies.

POTA V., FORBES D.A., ROMANOWSKY A.J., BRODIE J.P., SPITLER L.R., STRADER J., FOSTER C., ARNOLD J.A., BENSON A., BLOM C., HARGIS J.R., RHODE K.L. and USHER C.

Abstract (from CDS):

We present a spectrophotometric survey of 2522 extragalactic globular clusters (GCs) around 12 early-type galaxies, nine of which have not been published previously. Combining space-based and multicolour wide-field ground-based imaging, with spectra from the Keck/DEep Imaging Multi-Object Spectrograph (DEIMOS) instrument, we obtain an average of 160 GC radial velocities per galaxy, with a high-velocity precision of ∼15kms-1 per GC. After studying the photometric properties of the GC systems, such as their spatial and colour distributions, we focus on the kinematics of metal-poor (blue) and metal-rich (red) GC subpopulations to an average distance of ∼8 effective radii from the galaxy centre.

Our results show that for some systems the bimodality in GC colour is also present in GC kinematics. The kinematics of the red GC subpopulations are strongly coupled with the host galaxy stellar kinematics. The blue GC subpopulations are more dominated by random motions, especially in the outer regions, and decoupled from the red GCs. Peculiar GC kinematic profiles are seen in some galaxies: the blue GCs in NGC 821 rotate along the galaxy minor axis, whereas the GC system of the lenticular galaxy NGC 7457 appears to be strongly rotation supported in the outer region.

We supplement our galaxy sample with data from the literature and carry out a number of tests to study the kinematic differences between the two GC subpopulations. We confirm that the GC kinematics are coupled with the host galaxy properties and find that the velocity kurtosis and the slope of their velocity dispersion profiles are different between the two GC subpopulations in more massive galaxies.


Abstract Copyright: © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2012)

Journal keyword(s): globular clusters: general - galaxies: evolution - galaxies: kinematics and dynamics - galaxies: star clusters: general

VizieR on-line data: <Available at CDS (J/MNRAS/428/389): ngc0821.dat ngc1400.dat ngc1407.dat ngc2768.dat ngc3115.dat ngc3377.dat ngc4278.dat ngc4365.dat ngc5846.dat ngc7457.dat>

Nomenclature: Table 5: [PFR2013] NGCNNNN GCNN N=2522, [PFR2013] NGCNNNN starNN N=?, [PFR2013] NGCNNNN galNN N=?.

Simbad objects: 2093

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2020.09.23-17:12:08

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