J/MNRAS/421/1485 NGC 3923 globular clusters (Norris+, 2012)
The globular cluster kinematics and galaxy dark matter content of NGC 3923.
Norris M.A., Gebhardt K., Sharples R.M., Faifer F.R., Bridges T.,
Forbes D.A., Forte J.C., Zepf S.E., Beasley M.A., Hanes D.A., Proctor R.,
Kannappan S.J.
<Mon. Not. R. Astron. Soc., 421, 1485-1498 (2012)>
=2012MNRAS.421.1485N 2012MNRAS.421.1485N
ADC_Keywords: Clusters, globular ; Photometry, SDSS ; Radial velocities
Keywords: globular clusters: general - galaxies: general -
galaxies: individual: NGC 3923 - galaxies: kinematics and dynamics
Abstract:
This paper presents further results from our spectroscopic study of
the globular cluster (GC) system of the group elliptical NGC 3923.
From observations made with the GMOS instrument on the Gemini South
Telescope, an additional 50 GC and ultra-compact dwarf (UCD)
candidates have been spectroscopically confirmed as members of the NGC
3923 system. When the recessional velocities of these GCs are combined
with the 29 GC velocities reported previously, a total sample of 79
GC/UCD velocities is produced. This sample extends to over 6-arcmin
(>6Re∼30kpc) from the centre of NGC 3923 and is used to study the
dynamics of the GC system and the dark matter content of NGC 3923.
Description:
In this paper we continue the study of the GC system of NGC 3923 first
presented in Norris et al. (2008MNRAS.385...40N 2008MNRAS.385...40N). To the 29 NGC 3923
GC velocities previously determined from MOS we add an additional 50
GC velocities measured using a combination of MOS and Nod-and-Shuffle
(N&S) observations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 80 79 Confirmed NGC 3923 GCs. ID, RA, Dec, X, Y, g, r,
i, velocity and velocity errors for all 79
confirmed NGC 3923 GCs/UCDs
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See also:
J/MNRAS/416/155 : Globular clusters in five early-type galaxies (Faifer+, 2011)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- ID Identification number (1)
6- 13 F8.4 deg RAdeg Right ascension (J2000)
14 A1 --- --- [0]
16- 23 F8.4 deg DEdeg Declination (J2000)
24 A1 --- --- [0]
26- 30 F5.2 arcmin Xpos X position relative to the galaxy centre
32- 36 F5.2 arcmin Ypos Y position relative to the galaxy centre
38- 42 F5.2 mag g'0mag Dereddened SDSS g' magnitude
44- 48 F5.2 mag r'0mag Dereddened SDSS r' magnitude
50- 54 F5.2 mag i'0mag Dereddened SDSS i' magnitude
56- 61 F6.1 km/s Vel Radial velocity
63- 66 F4.1 km/s e_Vel rms uncertainty on Vel
68- 80 A13 --- Name Other designation (2)
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Note (1): The ID refers to the GC position in the photometry table of Faifer
et al. (2011, Cat. J/MNRAS/416/155), <[FFN2011] 3923 GC NNNN> in Simbad.
Note (2): Name denotes the ID given to objects studied in
* Norris et al. (2008MNRAS.385...40N 2008MNRAS.385...40N): NSBn, <[NSB2008] NNN> in Simbad)
* Norris & Kannappan (2011MNRAS.414..739N 2011MNRAS.414..739N): 3923-UCDn,
<[NK2011] NGC 3923 UCD N> in Simbad.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 04-Mar-2013