J/AJ/153/114     GCs in 27 nearby ETGs from the SLUGGS survey    (Forbes+, 2017)
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The SLUGGS survey: a catalog of over 4000 globular cluster radial velocities
in 27 nearby early-type galaxies.
    Forbes D.A., Alabi A., Brodie J.P., Romanowsky A.J., Strader J., Foster C.,
    Usher C., Spitler L., Bellstedt S., Pastorello N., Villaume A.,
    Wasserman A., Pota V.
   <Astron. J., 153, 114-114 (2017)>
   =2017AJ....153..114F    (SIMBAD/NED BibCode)
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ADC_Keywords: Galaxies, nearby ; Clusters, globular ; Morphology ;
              Velocity dispersion ; Radial velocities ; Surveys
Keywords: catalogs - galaxies: star clusters: general - surveys

Abstract:
    Here, we present positions and radial velocities for over 4000
    globular clusters (GCs) in 27 nearby early-type galaxies from the
    SLUGGS survey. The SLUGGS survey is designed to be representative of
    elliptical and lenticular galaxies in the stellar mass range
    10<logM_*_/M_{sun}_<11.7. The data have been obtained over many years,
    mostly using the very stable multi-object spectrograph DEIMOS on the
    Keck II 10 m telescope. Radial velocities are measured using the calcium
    triplet lines, with a velocity accuracy of +/-10-15 km/s. We use phase
    space diagrams (i.e., velocity-position diagrams) to identify
    contaminants such as foreground stars and background galaxies, and to
    show that the contribution of GCs from neighboring galaxies is
    generally insignificant. Likely ultra-compact dwarfs are tabulated
    separately. We find that the mean velocity of the GC system is close
    to that of the host galaxy systemic velocity, indicating that the GC
    system is in overall dynamical equilibrium within the galaxy potential.
    We also find that the GC system velocity dispersion scales with host
    galaxy stellar mass, in a similar manner to the Faber-Jackson relation
    for the stellar velocity dispersion. Publication of these GC radial
    velocity catalogs should enable further studies in many areas, such as
    GC system substructure, kinematics, and host galaxy mass measurements.

Description:
    Our sample consists of GC systems associated with 25 early-type
    galaxies from the SLUGGS survey (Brodie et al. 2014ApJ...796...52B)
    plus two of the three bonus galaxies (NGC 3607 and NGC 5866) that were
    observed with the same setup.
    We have obtained wide-field multi-filter imaging of the SLUGGS galaxies
    using the Subaru telescope under =<1 arcsec seeing conditions. This is
    supplemented by HST and CFHT imaging.
    Spectroscopic observations of GC candidates were obtained over the
    last decade using the DEIMOS spectrograph (Faber et al.
    2003SPIE.4841.1657F) on the Keck II 10 m telescope. The DEIMOS instrument
    is used in multi-slit mode, with each slit mask covering an area of
    ~16x5 arcmin^2^.

File Summary:
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 FileName      Lrecl  Records   Explanations
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ReadMe            80        .   This file
table1.dat        67       27   SLUGGS Galaxy Properties
table2.dat        61      865   Contaminants
table3.dat        24       21   Neighbor Galaxies
table4.dat        61       33   Ultra-compact Dwarf Radial Velocities
table5.dat        61     3573   Globular Cluster Radial Velocities
                                 (from Erratum, 2017, AJ, 154, 80)
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See also:
 J/MNRAS/428/389  : SLUGGS globular clusters in early-type galaxies
                                                                   (Pota+, 2013)
 J/MNRAS/436/1172 : Globular Clusters of NGC 4278 in SLUGGS (Usher+, 2013)
 J/AJ/148/32      : Globular cluster candidates in NGC 3115 (Jennings+, 2014)
 J/MNRAS/452/2208 : NGC 4473 globular clusters (Alabi+, 2015)
 J/MNRAS/458/105  : SLUGGS NGC 3607 and 3608 globular clusters (Kartha+, 2016)

Byte-by-byte Description of file: table1.dat
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   Bytes Format Units   Label  Explanations
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   1-  4  I4    ---     NGC    [720/7457] SLUGGS galaxy name
   6-  8  I3    ---     N      [32/654] Number of galaxy data in tables 2-5
  10- 13  F4.1  Mpc     Dist   [9.4/26.9] Distance (1)
  15- 19  F5.2  [Msun]  logM*  [10.13/11.62] Log stellar mass (2)
  21- 25  F5.1  arcsec  Reff   [10.1/139] Effective radius (2)
  27- 33  A7    ---     MType  Hubble morphological type (1)
      35  A1    ---     Env    Local environment type (F=Field, G=Group) (1)
  37- 40  I4    km/s    Vsys   [558/2260] Galaxy systemic velocity (1)
  42- 44  I3    km/s    sigma  [74/308] Stellar velocity dispersion within 1 kpc
                                (1)
  46- 55  F10.6 deg     RAdeg  Right Ascension in decimal degrees (J2000) (3)
  57- 67  F11.7 deg     DEdeg  Declination in decimal degrees (J2000) (3)
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Note (1): Values taken from Brodie et al. (2014ApJ...796...52B). Note that
          V_sys_ for NGC 4474 was reported incorrectly in Brodie et al. and has
          been corrected here.
Note (2): Values from Forbes et al. (2017MNRAS.464.4611F).
Note (3): The position of each galaxy center is taken from the NASA
          Extragalactic Database.
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Byte-by-byte Description of file: table2.dat table4.dat table5.dat
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   Bytes Format Units    Label  Explanations
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   1- 14  A14   ---      Star   Object identifier
  16- 25  F10.6 deg      RAdeg  Right Ascension in decimal degrees (J2000)
  27- 36  F10.6 deg      DEdeg  Declination in decimal degrees (J2000)
  38- 41  I4    km/s     HRV    [-379/2777]?=99 Heliocentric radial velocity (1)
  43- 45  I3    km/s   e_HRV    [2/194]?=99 Uncertainty in HRV (1)
  47- 54  F8.2  arcsec   Offset [0.36/11685.2]? Radial offset (only in table 2)
  56- 61  F6.2  arcmin   Rgal   [0.02/173]? Galactocentric radius (not in
                                 table 2)
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Note (1): We do not quote actual recession velocities for background galaxies
          as we only applied absorption line templates. These have 99 for the
          HRV and uncertainty values.
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Byte-by-byte Description of file: table3.dat
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   Bytes Format Units  Label      Explanations
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   1-  4  I4    ---    NGC        [3377/7457] SLUGGS galaxy name
   6- 14  A9    ---    Neighbor   Neighboring galaxy name (1)
  16- 19  I4    km/s   DeltaVsys  [-844/1384] Galaxy systemic velocity
                                   difference {Delta}V_sys_ (2)
  21- 24  F4.1  arcmin DeltaRgal  [0.6/11.6] Galaxy projected galactocentric
                                   radius difference {Delta}R
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Note (1): Neighbor galaxies that lie within 12 arcmin on the sky, <1000 km/s in
          systemic velocity difference and <4 mag difference from the primary
          SLUGGS galaxy.
Note (2): Systemic velocity of SLUGGS galaxy minus that of the neighbor.
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History:
    25-Apr-2018: From electronic version of the journal
    28-Jun-2018: Corrected table5 from erratum

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(End)              Prepared by AAS, Tiphaine Pouvreau [CDS]          12-Apr-2018