189 citations · 2.9k across the 58 of their papers we have counts for
40 papers · 1 filter
CLusters in the Uv as EngineS (CLUES). II. Sub-kpc scale outflows driven by stellar feedback
Mattia Sirressi, Angela Adamo, Matthew Hayes +17
We analyze the far-ultraviolet spectroscopy of 20 young and massive star clusters (YSCs) in 11 nearby star-forming galaxies. We probe the interstellar gas intervening along the lin…
Measuring M31 globular cluster ages and metallicities using both photometry and spectroscopy
Christopher Usher, Nelson Caldwell, Ivan Cabrera-Ziri
The ages and metallicities of globular clusters play an important role not just in testing models for their formation and evolution but in understanding the assembly history for th…
Search strategies for supermassive stars in young clusters and application to nearby galaxies
A. Kuruvanthodi, D. Schaerer, M. Messa +4
Supermassive stars (SMS) with masses , formed by runaway collisions in young, massive, and dense star clusters have been invoked as a possible soluti…
Updated radial velocities and new constraints on the nature of the unseen source in NGC1850 BH1
Sara Saracino, Tomer Shenar, Sebastian Kamann +7
A black hole candidate orbiting a luminous star in the Large Magellanic Cloud young cluster NGC 1850 (Myr) has recently been reported based on radial velocity and light cu…
CLusters in the Uv as EngineS (CLUES): I. Survey presentation \& FUV spectral analysis of the stellar light
M. Sirressi, A. Adamo, M. Hayes +17
The CLusters in the Uv as EngineS (CLUES) survey is a Cosmic Origins Spectrograph (COS) campaign aimed at acquiring the 1130 to 1770 Å, restframe spectroscopy of very young (<20 My…
Stellar feedback in M83 as observed with MUSE -- II. Analysis of the HII region population: ionisation budget and pre-SN feedback
Lorenza Della Bruna, Angela Adamo, Anna F. McLeod +11
We study pre-supernova feedback in a sample of 4700 HII regions in the nearby spiral galaxy M83, identified on their H emission. We pectroscopically identify Wolf-Rayet (…
Stellar feedback in M83 as observed with MUSE -- I. Overview, an unprecedented view of the stellar and gas kinematics and evidence of outflowing gas
Lorenza Della Bruna, Angela Adamo, Philippe Amram +14
We present a large VLT/MUSE mosaic (3.8 x 3.8 kpc) of the nearby spiral galaxy M83, with a spatial resolution ~20 pc. We obtained the kinematics of the stars and ionised gas, and c…
A black hole detected in the young massive LMC cluster NGC 1850
S. Saracino, S. Kamann, M. G. Guarcello +8
We report the detection of a black hole (NGC 1850 BH1) in the 100 Myr-old massive cluster NGC~1850 in the Large Magellanic Cloud. It is in a binary system with a main-sequenc…
MUSE narrow field mode observations of the central kinematics of M15
Christopher Usher, Sebastian Kamann, Mark Gieles +4
We present observations of the stellar kinematics of the centre of the core collapsed globular cluster M15 obtained with the MUSE integral field spectrograph on the VLT operating i…
How well can we determine ages and chemical abundances from spectral fitting of integrated light spectra?
Geraldo Gonçalves, Paula Coelho, Ricardo Schiavon +1
The pixel-to-pixel spectral fitting technique is often used in studies of stellar populations. It enables the user to infer several parameters from integrated light spectra such as…
Searching for globular cluster chemical anomalies on the main sequence of a young massive cluster
I. Cabrera-Ziri, J. S. Speagle, E. Dalessandro +9
The spectroscopic and photometric signals of the star-to-star abundance variations found in globular clusters seem to be correlated with global parameters like the cluster's metall…
Photometric characterization of multiple populations in star clusters: The impact of the first dredge-up
Maurizio Salaris, Chris Usher, Silvia Martocchia +6
The existence of star-to-star light-element abundance variations (multiple populations, MPs) in massive Galactic and extragalactic star clusters older than about 2 Gyr is by now we…
The SLUGGS Survey: Measuring globular cluster ages using both photometry and spectroscopy
Christopher Usher, Jean P. Brodie, Duncan A. Forbes +4
Globular cluster ages provide both an important test of models of globular cluster formation and a powerful method to constrain the assembly history of galaxies. Unfortunately, mea…
Multiple Populations in Integrated Light Spectroscopy of Intermediate Age Clusters
Nate Bastian, Christopher Usher, Sebastian Kamann +9
The presence of star-to-star light-element abundance variations (a.k.a. multiple populations, MPs) appears to be ubiquitous within old and massive clusters in the Milky Way and all…
No evidence for intermediate-mass black holes in the globular clusters Cen and NGC 6624
Holger Baumgardt, Chenyu He, Sarah M. Sweet +8
We compare the results of a large grid of N-body simulations with the surface brightness and velocity dispersion profiles of the globular clusters Cen and NGC 6624. Our models…
Young star cluster populations in the E-MOSAICS simulations
Joel Pfeffer, Nate Bastian, J. M. Diederik Kruijssen +3
We present an analysis of young star clusters (YSCs) that form in the E-MOSAICS cosmological, hydrodynamical simulations of galaxies and their star cluster populations. Through com…
The WAGGS project - II. The reliability of the calcium triplet as a metallicity indicator in integrated stellar light
Christopher Usher, Thomas Beckwith, Sabine Bellstedt +12
Using data from the WiFeS Atlas of Galactic Globular cluster Spectra we study the behaviour of the calcium triplet (CaT), a popular metallicity indicator in extragalactic stellar p…
Cluster kinematics and stellar rotation in NGC 419 with MUSE and adaptive optics
Sebastian Kamann, Nathan J. Bastian, Tim-Oliver Husser +9
We present adaptive optics (AO) assisted integral-field spectroscopy of the intermediate-age star cluster NGC 419 in the Small Magellanic Cloud. By investigating the cluster dynami…
The origin of the 'blue tilt' of globular cluster populations in the E-MOSAICS simulations
Christopher Usher, Joel Pfeffer, Nate Bastian +3
The metal-poor sub-population of globular cluster (GC) systems exhibits a correlation between the GC average colour and luminosity, especially in those systems associated with mass…
Multiple populations within globular clusters in Early-type galaxies Exploring their effect on stellar initial mass function estimates
William Chantereau, Christopher Usher, Nate Bastian
It is now well-established that most (if not all) ancient globular clusters host multiple popula- tions, that are characterised by distinct chemical features such as helium abundan…
Age as a Major Factor in the Onset of Multiple Populations in Stellar Clusters
S. Martocchia, I. Cabrera-Ziri, C. Lardo +16
It is now well established that globular clusters (GCs) exhibit star-to-star light-element abundance variations (known as multiple stellar populations, MPs). Such chemical anomalie…
The WAGGS project - I. The WiFeS Atlas of Galactic Globular cluster Spectra
Christopher Usher, Nicola Pastorello, Sabine Bellstedt +9
We present the WiFeS Atlas of Galactic Globular cluster Spectra, a library of integrated spectra of Milky Way and Local Group globular clusters. We used the WiFeS integral field sp…
The Search for Multiple Populations in Magellanic Cloud Clusters III: No evidence for Multiple Populations in the SMC cluster NGC 419
S. Martocchia, N. Bastian, C. Usher +16
We present the third paper about our ongoing HST survey for the search for multiple stellar populations (MPs) within Magellanic Cloud clusters. We report here the analysis of NGC 4…
The SLUGGS Survey: a catalog of over 4000 globular cluster radial velocities in 27 nearby early-type galaxies
Duncan A. Forbes, Adebusola Alabi, Jean P. Brodie +10
Here we present positions and radial velocities for over 4000 globular clusters (GCs) in 27 nearby early-type galaxies from the SLUGGS survey. The SLUGGS survey is designed to be r…