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J/ApJ/806/133     Virgo cluster ETGs: GC and galaxy diffuse light    (Li+, 2015)

A Gemini/GMOS study of intermediate luminosity early-type Virgo cluster galaxies. I. Globular cluster and stellar kinematics. Li B., Peng E.W., Zhang H.-X., Blakeslee J.P., Cote P., Ferrarese L., Jordan A., Liu C., Mei S., Puzia T.H., Takamiya M., Trancho G., West M.J. <Astrophys. J., 806, 133 (2015)> =2015ApJ...806..133L (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Clusters, globular ; Radial velocities ; Photometry, ugriz ; Reddening ; Velocity dispersion Keywords: galaxies: elliptical and lenticular, cD - galaxies: kinematics and dynamics - galaxies: star clusters: general Abstract: We present a kinematic analysis of the globular cluster (GC) systems and diffuse stellar light of four intermediate luminosity (sub-L*) early-type galaxies in the Virgo cluster based on Gemini Multi-Object Spectrographs (GMOS) data. Our galaxy sample is fainter (-23.8<MK←22.7) than most previous studies, nearly doubling the number of galaxies in this magnitude range that now have GC kinematics. The data for the diffuse light extends to 4Re, and the data for the GCs reaches 8-12Re. We find that the kinematics in these outer regions are all different despite the fact that these four galaxies have similar photometric properties, and are uniformly classified as "fast rotators" from their stellar kinematics within 1Re. The GC systems exhibit a wide range of kinematic morphology. The rotation axis and amplitude can change between the inner and outer regions, including a case of counter-rotation. This difference shows the importance of wide-field kinematic studies, and shows that stellar and GC kinematics can change significantly as one moves beyond the inner regions of galaxies. Moreover, the kinematics of the GC systems can differ from that of the stars, suggesting that the formation of the two populations are also distinct. Description: We selected four intermediate-luminosity ETGs from the ACS Virgo Cluster Survey (ACSVCS; Cote et al. 2004, J/ApJS/153/223), a homogeneous Hubble Space Telescope survey of 100 ETGs in the nearby Virgo cluster of galaxies using the Advanced Camera for Surveys (ACS; Ford et al. 1998SPIE.3356..234F). We observed these galaxies with the Gemini Multi-Object Spectrographs (GMOS, Hook et al. 2004PASP..116..425H), twin instruments on the Gemini North and Gemini South telescopes. Our target galaxies have sizes (Re∼10-18") that fit well within the GMOS field of view (5.5 arcmin2), providing coverage out to 10-16Re. Each galaxy contained ∼50 targetable GCs with V<23 mag. VCC 1231, VCC 1062, and VCC 2000 data were taken with GMOS-South, whereas data for VCC 685 was taken with GMOS-North. Objects: ---------------------------------------------------------- RA (ICRS) DE Designation(s) ---------------------------------------------------------- 12 26 32.1 +12 43 24 Virgo cluster = NAME Virgo I ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 73 4 Sample Properties table8.dat 87 149 Globular Cluster table9.dat 51 84 Galaxy Diffuse Light
See also: VII/266 : Atlas of Virgo galaxies (McDonald+ 2011) J/AJ/90/1681 : The Virgo Cluster Catalog (VCC) (Binggeli+, 1985) J/ApJS/153/223 : ACS Virgo Cluster Survey. I. (Cote+, 2004) J/ApJS/154/509 : ACS Virgo Cluster Survey. II. (Jordan+, 2004) J/ApJS/171/101 : Globular clusters in the ACS Virgo cluster survey (Jordan+, 2007) J/A+A/526/A114 : Kinematic profiles of Virgo early-type galaxies (Toloba+, 2011) J/MNRAS/452/2208 : NGC 4473 globular clusters (Alabi+, 2015) J/ApJS/227/12 : NGVS XXV. Virgo globular clusters photometry (Powalka+, 2016) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1 A1 --- Flag [ABCD] Flag for the galaxy name in tables 8 and 9 3- 5 A3 --- --- [VCC] 6- 9 I4 --- VCC VCC number (NNNN) 11- 17 A7 --- Other Other ETG's name (NGCNNNN) 19- 21 A3 --- Type Hubble type from the NED database 23- 32 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000) (1) 34- 43 F10.6 deg DEdeg Declination in decimal degrees (J2000) (1) 45- 48 I4 km/s Vsys Galaxy systemic velocity (1) 50- 52 F3.1 kpc Re Effective radius from Ferrarese et al. (2006, J/ApJS/164/334) 54- 57 F4.1 Mpc Dist Distance (3) 59- 64 F6.2 mag KMag K-band absolute magnitude (1) (2) 66- 68 I3 deg PA Photometric position angle (4) 70- 73 F4.2 --- b/a Axis ratio (4)
Note (1): Data from ATLAS3D project (Cappellari et al. 2011, J/MNRAS/413/813). Note (2): Derived from the 2MASS extended source catalog (Jarrett et al. 2000AJ....119.2498J). Note (3): From Blakeslee et al. (2009ApJ...694..556B), except VCC 685 which is from the GC luminosity function estimates by Jordan et al. (2007, J/ApJS/171/101). Note (4): From 2MASS (Skrutskie et al. 2006AJ....131.1163S, Cat. VII/233).
Byte-by-byte Description of file: table8.dat
Bytes Format Units Label Explanations
1 A1 --- Host [ABCD] Host galaxy (G1) 3- 14 A12 --- ID Object identifier (VCCNNNNGC-NN) 16- 25 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000) 27- 35 F9.6 deg DEdeg Declination in decimal degrees (J2000) 37- 40 I4 km/s HRV Heliocentric radial velocity 42- 43 I2 km/s e_HRV Uncertainty in HRV 45- 50 F6.3 mag gmag ACSVCS/NGVS g-band magnitude 52- 56 F5.3 mag e_gmag Uncertainty in gmag 58- 63 F6.3 mag zmag ACSVCS/NGVS z-band magnitude 65- 69 F5.3 mag e_zmag Uncertainty in zmag 71- 75 F5.3 mag g-z The g-z color index 77- 81 F5.3 mag e_g-z Uncertainty in g-z 83- 87 F5.3 mag E(B-V) Galactic reddening (2)
Note (2): Determined by Schlegel et al. (1998ApJ...500..525S). The corrections for foreground reddening were taken to be Ag=3.634E(B-V) and Az=1. 485E(B-V) in the g and z bands, respectively (Jordan et al. 2004, J/ApJS/154/509).
Byte-by-byte Description of file: table9.dat
Bytes Format Units Label Explanations
1 A1 --- Host [ABCD] Host galaxy (G1) 3- 15 A13 --- ID Slit identifier (VCCNNNNGDL-NN) 17- 26 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000) 28- 36 F9.6 deg DEdeg Declination in decimal degrees (J2000) 38- 41 I4 km/s HRV Heliocentric radial velocity 43- 44 I2 km/s e_HRV Uncertainty in HRV 46- 48 I3 km/s sigma ? Velocity dispersion 50- 51 I2 km/s e_sigma ? Uncertainty in sigma
Global notes: Note (G1): Host galaxies as follows: A = VCC 1231; B = VCC 2000; C = VCC 1062; D = VCC 685.
History: From electronic version of the journal
(End) Prepared by Tiphaine Pouvreau [CDS] 14-Sep-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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