Publications (20)
Dynamics of the NGC 4636 Globular Cluster System - An extremely dark matter dominated galaxy?
Y. Schuberth, T. Richtler, B. Dirsch +4
We present the first dynamical study of the globular cluster system of NGC 4636. This giant elliptical galaxy is claimed to be extremely dark matter dominated, according to X-ray o…
Age -- Metallicity relation in the MCs clusters (Based on observations made with the Danish 1.54 m and ESO 3.6m Telescopes at La Silla Observatory, Chile)
E. Livanou, A. Dapergolas, M. Kontizas +5
Aims: To investigate a possible dependence between age and metallicity in the Magellanic Clouds (MCs) from a study of small open star clusters, using Strömgren photometry. Our goa…
Spectroscopy of Globular Clusters in NGC 1399 - A Progress Report
T. Richtler, B. Dirsch, D. Geisler +9
We performed spectroscopy of globular clusters associated with NGC 1399 and measured radial velocities of more than 400 clusters, the largest sample ever obtained for dynamical stu…
Large-scale study of the NGC 1399 globular cluster system in Fornax
L. P. Bassino, F. R. Faifer, J. C. Forte +4
We present a Washington C and Kron-Cousins R photometric study of the globular cluster system of NGC 1399, the central galaxy of the Fornax cluster. A large areal coverage of 1 squ…
The Globular Cluster Systems of NGC 3258 and NGC 3268 in the Antlia Cluster
B. Dirsch, T. Richtler, L. P. Bassino
The Antlia galaxy cluster is the third nearest galaxy cluster after Virgo and Fornax. We used the wide-field MOSAIC camera of the 4-m CTIO telescope to search in the brightest clus…
The globular cluster system of NGC 1316. II - The extraordinary object SH2
T. Richtler, B. Kumar, L. P. Bassino +2
SH2 has been described as an isolated HII-region, located about 6.5 arcmin south of the nucleus of NGC 1316 (Fornax A), a merger remnant in the the outskirts of the Fornax cluster…
The Globular Cluster System of NGC 1399. II. Kinematics of a Large Sample of Globular Clusters
T. Richtler, B. Dirsch, K. Gebhardt +9
We study the kinematics and dynamics of the globular cluster system of NGC 1399, the central galaxy of the Fornax cluster. The observational data consists of medium resolution spec…
Dwarf galaxies in the Antlia Cluster: First results
A. V. Smith Castelli, L. P. Bassino, S. A. Cellone +5
We present the first results of a project aimed to study the galaxy population of the Antlia cluster, the third nearest galaxy cluster after Virgo and Fornax. The observations for…
The globular cluster system of NGC 1399 V. dynamics of the cluster system out to 80 kpc
Y. Schuberth, T. Richtler, M. Hilker +4
(Abridged) We use the largest set of globular cluster velocities obtained so far of any elliptical galaxy to revise and extend the previous investigations of the dynamics of NGC 13…
The Globular Cluster System of NGC 1399 IV. Some noteworthy objects
T. Richtler, B. Dirsch, S. Larsen +2
We present 8 bright globular clusters and/or objects of less familiar nature which we found in the course of scrutinizing the globular cluster system of NGC 1399. These objects are…
The Globular Cluster System of NGC 1399: III. VLT Spectroscopy and Database
B. Dirsch, T. Richtler, D. Geisler +9
Radial velocities of 468 globular clusters around NGC 1399, the central galaxy in the Fornax cluster, have been obtained with FORS2 and the Mask Exchange Unit (MXU) at the ESO Very…
The globular cluster system of NGC1316. I. Wide-field photometry in the Washington system
T. Richtler, L. P. Bassino, B. Dirsch +1
NGC 1316 (Fornax A) is a prominent merger remnant in the outskirts of the Fornax cluster. The cluster system has not yet been studied in its entirety. We therefore present a wide-f…
Optical observations of the black hole candidate XTE J1550-564 during the Sep/Oct 1998 outburst
C. Sanchez-Fernandez, A. J. Castro-Tirado, H. W. Duerbeck +11
We report here optical observations during the September/October 1998 outburst of the black hole candidate XTE J1550-564. CCD photometry was obtained for the optical counterpart wi…
Globular cluster candidates within the Fornax Cluster: intracluster globulars?
L. P. Bassino, S. A. Cellone, J. C. Forte +1
We present the results of a search for globular clusters in the surroundings of 15 low surface brightness dwarf galaxies belonging to the Fornax Cluster, which was carried out on C…
Globular Clusters at the Centre of the Fornax Cluster: Tracing Interactions Between Galaxies
L. P. Bassino, T. Richtler, F. R. Faifer +4
We present the combined results of two investigations: a large-scale study of the globular cluster system (GCS) around NGC 1399, the central galaxy of the Fornax cluster, and a stu…
The Outer Cluster System of NGC 1399: Preliminary Results
Y. Schuberth, T. Richtler, B. Dirsch +2
We present preliminary results of our dynamical study of the outer globular cluster system of NGC 1399, the central galaxy in the Fornax Cluster. About 160 new radial velocities fo…
Age and metallicity for six LMC clusters and their surrounding field population
B. Dirsch, T. Richtler, W. P. Gieren +1
We investigate, on the basis of CCD Stroemgren photometry, the ages and metallicities of six LMC clusters together with their surrounding field population. The clusters and metalli…
The Outer Halo Cluster System of NGC 1399
B. Dirsch, D. Geisler, T. Richtler +1
We investigate the outer halo globular cluster population of NGC 1399. This study uses wide-field imaging of this cluster system, which covers the largest area studied with CCD pho…
A tiny Galactic dust cloud projected onto NGC 3269?
B. Dirsch, T. Richtler, M. Gomez
We report on new observations obtained with the Magellan Clay-telescope of a tiny dust patch in the Sa-galaxy NGC 3269 in the Antlia galaxy cluster. It has already been suspected t…
The dark matter halo of NGC 1399 - CDM or MOND?
T. Richtler, Y. Schuberth, M. Hilker +3
Central galaxies in galaxy clusters may be key discriminants in the competition between the cold dark matter (CDM) paradigm and modified Newtonian dynamics (MOND). We investigate t…