J/ApJ/559/812 Globular cluster system in M87 (Hanes+, 2001)
Dynamics of the globular cluster system associated with M87 (NGC 4486).
I. New CFHT MOS spectroscopy and the composite database.
Hanes D.A., Cote P., Bridges T.J., McLaughlin D.E., Geisler D.,
Harris G.L.H., Hesser J.E., Lee M.G.
<Astrophys. J., 559, 812-827 (2001)>
=2001ApJ...559..812H 2001ApJ...559..812H
ADC_Keywords: Radial velocities ; Photometry, CMT1T2V ; Clusters, globular
Keywords: dark matter - galaxies: formation - galaxies: halos -
galaxies: individual (M87) - galaxies: kinematics and dynamics -
galaxies: structure
Abstract:
We present a comprehensive database of kinematic, photometric, and
positional information for 352 objects in the field of M87 (NGC 4486),
the central giant elliptical galaxy in the Virgo Cluster; the majority
of the tracers are globular clusters associated with that galaxy. New
kinematic information comes from multislit observations with the
Multi-Object Spectrograph (MOS) of the Canada-France-Hawaii Telescope
(CFHT), an investigation that has added 96 new velocities to and
confirmed many of the earlier values in a preexisting data set of 256
velocities published elsewhere. The photometry, consisting of
magnitudes and colors in the Washington (T1, C-T1) system, is
based on CCD observations made at the Cerro Tololo Inter-American
Observatory (CTIO) and the Kitt Peak National Observatory (KPNO).
Description:
We used the MOS on five dark nights (1996 May 17-22) at the f/8
Cassegrain focus of the CFHT.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 84 352 Positions, photometry and kinematics
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See also:
J/AJ/106/493 : Globular clusters in M87 (Lee+, 1993)
J/AJ/115/1801 : VRI photometry of M87 globular clusters (Harris+ 1998)
J/ApJ/513/733 : Globular cluster system in M87 (Kundu+, 1999)
J/ApJS/73/671 : M87 globular clusters BVI photometry (Couture+, 1990)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- [SFH81] The Strom et al. (1981ApJ...245..416S 1981ApJ...245..416S)
identification number
6- 10 F5.1 arcsec SX x position from Strom et al.
12- 16 F5.1 arcsec SY y position from Strom et al.
18- 19 I2 h RAh Hour of Right Ascension (J2000)
21- 22 I2 min RAm Minute of Right Ascension (J2000)
24- 27 F4.1 s RAs Second of Right Ascension (J2000)
28 A1 --- DE- Sign of the Declination (J2000)
29- 30 I2 deg DEd Degree of Declination (J2000)
32- 33 I2 arcmin DEm Arcminute of Declination (J2000)
35- 36 I2 arcsec DEs Arcsecond of Declination (J2000)
38- 41 I4 arcsec oRA Right Ascension offset from M87 nucleus (1)
43- 46 I4 arcsec oDE Declination offset from M87 nucleus (1)
48- 52 F5.2 mag T1mag ? The Washington T1 band magnitude
54- 57 F4.2 mag C-T1 ? The Washington C-T1 color index
59- 62 I4 km/s RVMOS ? The CFHT MOS-based radial velocity
64- 66 I3 km/s e_RVMOS ? Uncertainty in RVMOS
68- 71 I4 km/s RVK97 ? The Cohen (1997ApJ...486..230C 1997ApJ...486..230C) radial
velocity
73 A1 --- f_RVK97 [N] Indicates the RVK97 value not given
75- 78 I4 km/s RVK00 ? The Cohen and Ryzhov (2000AJ....119..162C 2000AJ....119..162C)
radial velocity
80- 83 I4 km/s RVM90 ? The Mould et al. (1990AJ.....99.1823M 1990AJ.....99.1823M)
radial velocity
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Note (1): Measured positively to the East and North.
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History:
From electronic version of the journal
References:
Cote et al., Paper II 2001ApJ...559..828C 2001ApJ...559..828C
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 17-Feb-2006