Search Publications
Low-mass runaways from the Orion Nebula Cluster - kinematic age constraints on star cluster formation
Tan, Jonathan C.; Eyer, Laurent; Armstrong, Joseph J. +2 more
In their early, formative stages star clusters can undergo rapid dynamical evolution leading to strong gravitational interactions and ejection of "runaway" stars at high velocities. While O/B runaway stars have been well studied, lower-mass runaways are so far very poorly characterized, even though they are expected to be much more common. We carr…
SKYCURTAINS: model-agnostic search for stellar streams with Gaia data
Shih, David; Sengupta, Debajyoti; Mulligan, Stephen +2 more
We present SKYCURTAINS, a data-driven and model-agnostic method to search for stellar streams in the Milky Way galaxy using data from the Gaia telescope.SKYCURTAINS is a weakly supervised machine learning algorithm that builds a background enriched template in the signal region by leveraging the correlation of the source's characterizing features …
Testing disc reprocessing models for AGN optical variability by comparison of X-ray and optical power spectra of NGC 4395
Dhillon, V. S.; Knapen, J. H.; Breedt, E. +11 more
It is generally thought that active galactic nucleus (AGN) optical variability is produced, at least in part, by reprocessing of central X-rays by a surrounding accretion disc, resulting in wavelength-dependent lags between bands. Any good model of AGN optical variability should explain not only these lags, but also the overall pattern of variabil…
Simultaneous radio and X-ray observations of the transitional millisecond pulsar candidate 3FGL J1544.6-1125
Miller-Jones, J. C. A.; Russell, T. D.; Deller, A. T. +6 more
Transitional millisecond pulsars (tMSPs) are neutron star systems that alternate between a rotation-powered radio millisecond pulsar state and an accretion disc-dominated low-mass X-ray binary (LMXB)-like state on multi-year time-scales. During the LMXB-like state, the X-ray emission from tMSPs switches between 'low' and 'high' X-ray brightness mo…
A catalogue of binary stars from phase modulation in the first four years of TESS mission photometry
Murphy, Simon J.; Huang, Chelsea X.; Wright, Duncan +2 more
We present a catalogue of binary companions to
VIRAC2: NIR astrometry and time series photometry for 500M+ stars from the VVV and VVVX surveys
Smith, Leigh C.; Belokurov, Vasily; Minniti, Dante +11 more
We present VIRAC2, a catalogue of positions, proper motions, parallaxes and Z, Y, J, H, and
The XMM Cluster Survey: automating the estimation of hydrostatic mass for large samples of galaxy clusters – I. Methodology, validation, and application to the SDSSRM-XCS sample
Nichol, R. C.; Romer, A. K.; Bhargava, S. +18 more
We describe features of the X-ray: Generate and Analyse (XGA) open-source software package that have been developed to facilitate automated hydrostatic mass (
Asteroseismic masses of red giants in the Galactic Globular Clusters M9 and M19
Stello, Dennis; Kalup, Csilla; De Silva, Gayandhi M. +2 more
Asteroseismic masses of globular cluster (GC) stars are invaluable to investigate stellar evolution. Previously, only two GCs have been seismically studied. We present new detections of solar-like oscillations in the clusters M9 and M19, focusing on two key areas: stellar mass-loss and GC multiple populations. Using K2 photometry, we detect solar-…
Distribution functions for the modelling of accretion remnants in Milky Way-like galaxies: insights from IllustrisTNG
Bovy, Jo; Lane, James M. M.
We study accretion remnants around Milky Way analogues in the IllustrisTNG simulations to determine how well commonly used distribution functions (DFs) describe their phase-space distributions. We identify 30 Milky Way analogues and 116 remnants from mergers with stellar mass ratios greater than 1:20. Two power density profiles, as well as rotatin…
Deep imaging of three accelerating stars using SHARK-NIR and LMIRCam at LBT
Ertel, S.; Barbato, D.; D'Orazi, V. +29 more
The combination of detection techniques enhances our ability to identify companions orbiting nearby stars. We employed high-contrast imaging to constrain mass and separation of possible companions responsible for the significant proper motion anomalies of the nearby stars HIP 11696, HIP 47110, and HIP 36277. These targets were observed using the L…