J/A+A/637/A26 Fornax 3D project. Globular clusters (Fahrion+, 2020)
The Fornax 3D project: Globular clusters tracing kinematics and metallicities.
Fahrion K., Lyubenova M., Hilker M., van de Ven G., Falcon-Barroso J.,
Leaman R., Martin-Navarro I., Bittner A., Coccato L., Corsini E.M.,
Gadotti D.A., Iodice E., McDermid R.M., Pinna F., Sarzi M., Viaene S.,
de Zeeuw P.T., Zhu L.
<Astron. Astrophys. 637, A26 (2020)>
=2020A&A...637A..26F 2020A&A...637A..26F (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Clusters, globular ; Photometry, HST ;
Abundances, [Fe/H]
Keywords: galaxies: star clusters: general -
galaxies: clusters: individual: Fornax -
galaxies: kinematics and dynamics - galaxies: evolution
Abstract:
Globular clusters (GCs) are found ubiquitously in massive galaxies and
due to their old ages, they are regarded as fossil records of galaxy
evolution. Spectroscopic studies of GC systems are often limited to
the outskirts of galaxies, where GCs stand out against the galaxy
background and serve as bright tracers of galaxy assembly. In this
work we use the capabilities of the Multi Unit Explorer Spectrograph
(MUSE) to extract a spectroscopic sample of 722 GCs in the inner
regions (<3Reff) of 32 galaxies in the Fornax cluster. These galaxies
were observed as part of the Fornax 3D project, a MUSE survey that
targets early and late-type galaxies within the virial radius of
Fornax. After accounting for the galaxy background in the GC spectra,
we extracted line-of-sight velocities and determined metallicities of
a subsample of 238 GCs. We found signatures of rotation within GC
systems and comparing the GC kinematics and that of the stellar body
shows that the angular momentum of the GC system reflects that of the
stars, confirming the usefulness of GCs as kinematic tracers. While
the red GCs prove to closely follow the metallicity profile of the
host galaxy, the blue GCs show a large spread of metallicities but are
generally more metal -poor than the host.
Description:
This file contains the catalogue of spectroscopically confirmed
globular clusters. The columns zmag, e_zgmag, gmag, e_gmag, rhz,
e_rhz, rhg and e_rhg were taken from Jordan et al.
(2015ApJS..221...13J 2015ApJS..221...13J, Cat. J/ApJS/221/13) where available.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
gc-cat.dat 121 722 Catalogue of spectroscopically confirmed
globular clusters
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See also:
J/ApJS/221/13 : ACS Fornax Cluster Survey. XI. GC candidates (Jordan+, 2015)
Byte-by-byte Description of file: gc-cat.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Galaxy Host galaxy (IC = intra-cluster)
8- 17 F10.7 deg RAdeg Right ascension (J2000)
19- 29 F11.7 deg DEdeg Declination (J2000)
31- 36 F6.3 mag zmag ?=0 z-band magnitude (1)
38- 42 F5.3 mag e_zmag ?=0 rms uncertainty z-band magnitude (1)
44- 49 F6.3 mag gmag ?=0 g-band magnitude (1)
51- 55 F5.3 mag e_gmag ?=0 rms uncertainty g-band magnitude (1)
57- 62 F6.4 arcsec rhz ?=0 Half-light radius, z-band (1)
64- 69 F6.4 arcsec e_rhz ?=0 rms uncertainty half-light radius,
z-band (1)
71- 76 F6.4 arcsec rhg ?=0 Half-light radius, g-band (1)
78- 83 F6.4 arcsec e_rhg ?=0 rms uncertainty half-light radius,
g-band from (1)
85- 89 F5.2 mag g-zMUSE ?=- Synthetic MUSE (g-z) colour index
91- 94 F4.1 --- SNR Spectral signal-to-noise ratio
96-102 F7.2 km/s vLOS Line-of-sight velocity
104-109 F6.3 km/s e_vLOS rms uncertainty line-of-sight velocity
111-115 F5.2 --- [M/H] Metallicity
117-121 F5.3 --- e_[M/H] rms uncertainty metallicity
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Note (1): from Jordan et al. (2015ApJS..221...13J 2015ApJS..221...13J, Cat. J/ApJS/221/13).
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Acknowledgements:
Katja Fahrion, kfahrion(at)eso.org
(End) Patricia Vannier [CDS] 26-Mar-2020