Search Publications
LRG-BEASTS: Sodium absorption and Rayleigh scattering in the atmosphere of WASP-94A b using NTT/EFOSC2
Kirk, J.; Louden, T.; Wheatley, P. J. +3 more
We present an optical transmission spectrum for WASP-94A b, the first atmospheric characterization of this highly-inflated hot Jupiter. The planet has a reported radius of $1.72^{+0.06}_{-0.05}$ RJup, a mass of only $0.456^{+0.032}_{-0.036}$ MJup, and an equilibrium temperature of 1508 ± 75 K. We observed the planet transit s…
Systematic Korea Microlensing Telescope Network planetary anomaly search - III. One wide-orbit planet and two stellar binaries
Han, Cheongho; Udalski, Andrzej; Lee, Chung-Uk +36 more
Only a few wide-orbit planets around old stars have been detected, which limits our statistical understanding of this planet population. Following the systematic search for planetary anomalies in microlensing events found by the Korea Microlensing Telescope Network, we present the discovery and analysis of three events that were initially thought …
Observations of the initial formation and evolution of spiral galaxies at 1 < z < 3 in the CANDELS fields
Conselice, Christopher J.; Simmons, Brooke; Masters, Karen +4 more
Many aspects concerning the formation of spiral and disc galaxies remain unresolved, despite their discovery and detailed study over the past 150 yr. As such, we present the results of an observational search for proto-spiral galaxies and their earliest formation, including the discovery of a significant population of spiral-like and clumpy galaxi…
Dust distributions in the magellanic clouds
Chen, B. -Q.; Yang, M.; Gao, J. +3 more
We present high-resolution maps of the dust reddening in the Magellanic Clouds (MCs). The maps cover the Large and Small Magellanic Cloud (LMC and SMC) area and have a spatial angular resolution between ~26 arcsec and 55 arcmin. Based on the data from the optical and near-infrared (IR) photometric surveys, including the Gaia Survey, the SkyMapper …
Where outflows meet inflows: gas kinematics in SSA22 Ly α blob 2 decoded by advanced radiative transfer modelling
Steidel, Charles C.; Gronke, Max; Li, Zhihui +2 more
We present new spectroscopic observations of Ly α (Ly α) Blob 2 (z ~ 3.1). We observed extended Ly α emission in three distinct regions, where the highest Ly α surface brightness (SB) centre is far away from the known continuum sources. We searched through the MOSFIRE slits that cover the high Ly α SB regions, but were unable to detect any signifi…
Do AGN triggering mechanisms vary with radio power? - II. The importance of mergers as a function of radio power and optical luminosity
Tadhunter, C. N.; Ramos Almeida, C.; Pierce, J. C. S. +7 more
Investigation of the triggering mechanisms of radio active galactic nuclei (radio AGN) is important for improving our general understanding of galaxy evolution. In the first paper in this series, detailed morphological analysis of high-excitation radio galaxies (HERGs) with intermediate radio powers suggested that the importance of triggering via …
A new reference catalogue for the very metal-poor Universe: +150 OB stars in Sextans A
Herrero, A.; Castro, N.; Najarro, F. +3 more
Local Group (LG) very metal-poor massive stars are the best proxy for the First Stars of the Universe and fundamental to modelling the evolution of early galaxies. These stars may follow new evolutionary pathways restricted to very low metallicities, such as chemically homogeneous evolution (CHE). However, given the great distance leap needed to r…
Similarities behind the high- and low-α disc: small intrinsic abundance scatter and migrating stars
Ness, Melissa K.; Buck, Tobias; Johnston, Kathryn V. +2 more
The detailed age-chemical abundance relations of stars measure time-dependent chemical evolution. These trends offer strong empirical constraints on nucleosynthetic processes, as well as the homogeneity of star-forming gas. Characterizing chemical abundances of stars across the Milky Way over time has been made possible very recently, thanks to su…
The Gaia-ESO survey: constraining evolutionary models and ages for young low mass stars with measurements of lithium depletion and rotation
Gilmore, G.; Bayo, A.; Randich, S. +13 more
A growing disquiet has emerged in recent years that standard stellar models are at odds with observations of the colour-magnitude diagrams (CMDs) and lithium depletion patterns of pre-main sequence stars in clusters. In this work we select 1246 high probability K/M-type constituent members of five young open clusters (5-125 Myr) in the Gaia-ESO Su…
The velocity structure of the intracluster medium of the Centaurus cluster
Fabian, A. C.; Pinto, C.; Sanders, J. S. +7 more
There are few direct measurements of the intracluster medium (ICM) velocity structure, despite its importance for understanding clusters. We present a detailed analysis of the velocity structure of the Centaurus cluster using XMM-Newton observations. Using a new European Photon Imaging Camera-pn energy scale calibration, which uses the Cu Kα instr…