J/A+A/569/A41 Radial velocities of NGC1316 globular clusters (Richtler+, 2014)
The globular cluster system of NGC 1316. III. Kinematic complexity.
Richtler T., Hilker M., Kumar B., Bassino L.P., Gomez M., Dirsch B.
<Astron. Astrophys., 569, A41-41 (2014)>
=2014A&A...569A..41R 2014A&A...569A..41R
ADC_Keywords: Galaxies, peculiar ; Clusters, globular ; Radial velocities
Keywords: galaxies: individual: NGC 1316 - galaxies: kinematics and dynamics -
galaxies: star clusters: general - galaxies: star clusters: general
Abstract:
The merger remnant NGC 1316 (Fornax A) is one of the most important
objects regarding the investigation of and thus an important object to
study merger-related processes. A recent photometric study used
globular clusters in NGC 1316 to constrain its star formation history,
but without the knowledge of individual radial velocities. The
kinematical properties of the globular cluster system in comparison
with the diffuse stellar light might give more insight into the
formation of NGC 1316. Of particular interest is the dark matter
content. Planetary nebulae in NGC 1316 indicate a massive dark halo,
and globular cluster velocities provide independent evidence.
We aim at measuring radial velocities of globular clusters in NGC
1316. We use these kinematical data to investigate the global
structure of NGC 1316 and to constrain the dark matter content.
We perform multiobject spectroscopy with VLT/FORS2 and MXU. Out of 562
slits, we extract radial velocities for 177 globular clusters.
Moreover, we measure radial velocities of the integrated galaxy light,
using slits with a sufficiently bright sky. To these data, we add 20
cluster velocities from the literature. In an appendix, we identify
new morphological features of NGC 1316 and its companion galaxy
NGC 1317.
Description:
The observations were performed in service mode during seven nights
(period November 14 to December 21 2006) at the European Southern
Observatory (ESO) Very Large Telescope (VLT) facility at Cerro
Paranal, Chile (programme 078.B-0856(A), PI: Richtler).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tableb1.dat 55 141 Identification and radial velocities of globular
clusters appearing in the catalogue of Paper I
tableb2.dat 55 42 Identification and radial velocities of globular
clusters without entry in the photometric
catalogue in Paper I
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See also:
J/A+A/543/A131 : NGC1316 globular cluster candidates phot. (Richtler+, 2012)
Byte-by-byte Description of file: tableb1.dat tableb2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- --- [n1316-gc]
9- 13 I05 --- gcID [250/20852] Globular cluster identifier
15 I1 h RAh Right ascension (J2000)
17- 18 I2 min RAm Right ascension (J2000)
20- 24 F5.2 s RAs Right ascension (J2000)
26 A1 --- DE- Declination sign (J2000)
27- 28 I2 deg DEd Declination (J2000)
30- 31 I2 arcmin DEm Declination (J2000)
33- 34 I2 arcsec DEs Declination (J2000)
36- 40 F5.2 mag Rmag ?=99.99 Harris R magnitude
42- 46 F5.2 mag C-R [0.37/1.86]?=99.99 C-R colour index
(Washington C, Harris R)
48- 51 I4 km/s RV [1138/2482] Radial velocity
53- 55 I3 km/s e_RV [10/180] rms uncertainty on RV
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History:
From electronic version of the journal
References:
Richtler et al., Paper I 2012A&A...543A.131R 2012A&A...543A.131R, Cat. J/A+A/543/A131
Richtler et al., Paper II 2012A&A...543L...7R 2012A&A...543L...7R
(End) Patricia Vannier [CDS] 13-Nov-2014