Search Publications
The AT-LESS CO(1-0) survey of submillimetre galaxies in the Extended Chandra Deep Field South: First results on cold molecular gas in galaxies at z ∼ 2
Thomson, A. P.; Ivison, R. J.; Smail, Ian +13 more
We present the first results from our ongoing Australia Telescope Compact Array survey of 12CO(1-0) in Atacama Large Millimeter Array (ALMA)-identified submillimetre galaxies (SMGs) in the Extended Chandra Deep Field South. Strong detections of 12CO(1-0) emission from two SMGs, ALESS 122.1 (z = 2.0232) and ALESS 67.1 (z = 2.1…
Fully stripped? The dynamics of dark and luminous matter in the massive cluster collision MACSJ0553.4-3342
Richard, J.; Ebeling, H.; Qi, J.
We present the results of a multiwavelength investigation of the very X-ray luminous galaxy cluster MACSJ0553.4-3342 (z = 0.4270; hereafter MACSJ0553). Combining high-resolution data obtained with the Hubble Space Telescope and the Chandra X-ray Observatory with ground-based galaxy spectroscopy, our analysis establishes the system unambiguously as…
Transit probabilities in secularly evolving planetary systems
Triaud, Amaury H. M. J.; Wyatt, Mark C.; Read, Matthew J.
This paper considers whether the population of known transiting exoplanets provides evidence for additional outer planets on inclined orbits, due to the perturbing effect of such planets on the orbits of inner planets. As such, we develop a semi-analytical method for calculating the probability that two mutually inclined planets are observed to tr…
The properties, origin and evolution of stellar clusters in galaxy simulations and observations
Dale, D. A.; Calzetti, D.; Smith, L. J. +16 more
We investigate the properties and evolution of star particles in two simulations of isolated spiral galaxies, and two galaxies from cosmological simulations. Unlike previous numerical work, where typically each star particle represents one `cluster', for the isolated galaxies we are able to model features we term `clusters' with groups of particle…
Predicting emission line fluxes and number counts of distant galaxies for cosmological surveys
Cimatti, A.; Daddi, E.; Rodighiero, G. +9 more
We estimate the number counts of line emitters at high redshift and their evolution with cosmic time based on a combination of photometry and spectroscopy. We predict the H α, H β, [O II], and [O III] line fluxes for more than 35 000 galaxies down to stellar masses of ∼109 M⊙ in the COSMOS and GOODS-S fields, applying standar…
Separating galaxies from the cluster dark matter halo in Abell 611
Zitrin, A.; Koekemoer, A.; Postman, M. +7 more
We investigate the mass content of galaxies in the core of the galaxy cluster Abell 611. We perform a strong lensing analysis of the cluster core and use velocity dispersion measurements for individual cluster members as additional constraints. Despite the small number of multiply-imaged systems and cluster members with central velocity dispersion…
Structured star formation in the Magellanic inter-Cloud region
Da Costa, G. S.; Belokurov, V.; Koposov, S. E. +5 more
We use a new contiguous imaging survey conducted using the Dark Energy Camera to investigate the distribution and properties of young stellar populations in the Magellanic inter-Cloud region. These young stars are strongly spatially clustered, forming a narrow chain of low-mass associations that trace the densest H I gas in the Magellanic Bridge a…
A multiwavelength investigation of candidate millisecond pulsars in unassociated γ-ray sources
Greiner, J.; Belfiore, A.; Marelli, M. +7 more
About one-third of the 3033 γ-ray sources in the Third Fermi-LAT Gamma-ray Source Catalogue (3FGL) are unidentified and do not have even a tentative association with a known object; hence, they are defined as unassociated. Among Galactic γ-ray sources, pulsars represent the largest class, with over 200 identifications to date. About one-third of t…
MOCCA-SURVEY Database I: Is NGC 6535 a dark star cluster harbouring an IMBH?
Kamann, Sebastian; Bianchini, Paolo; Askar, Abbas +3 more
We describe the dynamical evolution of a unique type of dark star cluster model in which the majority of the cluster mass at Hubble time is dominated by an intermediate-mass black hole (IMBH). We analysed results from about 2000 star cluster models (Survey Database I) simulated using the Monte Carlo code MOnte Carlo Cluster simulAtor and identifie…
First observations of W Virginis stars with K2: detection of period doubling
Smolec, R.; Szabados, L.; Pál, A. +5 more
We present the first analysis of W Vir stars observed by the Kepler space telescope in the K2 mission. Clear cycle-to-cycle variations were detected in the light curves of KT Sco and the globular cluster member M80-V1. While the variations in the former star seem to be irregular on the short time-scale of the K2 data, the latter appears to experie…