Search Publications
The Nearby Evolved Stars Survey II: Constructing a volume-limited sample and first results from the James Clerk Maxwell Telescope
Kim, J.; Menten, K. M.; Marshall, J. P. +89 more
The Nearby Evolved Stars Survey (NESS) is a volume-complete sample of ~850 Galactic evolved stars within 3 kpc at (sub-)mm wavelengths, observed in the CO J = (2-1) and (3-2) rotational lines, and the sub-mm continuum, using the James Clark Maxwell Telescope and Atacama Pathfinder Experiment. NESS consists of five tiers, based on distances and dus…
Computing optical meteor flux using global meteor network data
Vida, Denis; Brown, Peter G.; Campbell-Brown, Margaret +3 more
Meteor showers and their outbursts are the dominant source of meteoroid impact risk to spacecraft on short time-scales. Meteor shower prediction models depend on historical observations to produce accurate forecasts. However, the current lack of quality and persistent world-wide monitoring at optical meteoroid sizes has left some recent major outb…
Where are the magnetar binary companions? Candidates from a comparison with binary population synthesis predictions
Lyman, J. D.; Kouveliotou, C.; Fruchter, A. S. +7 more
It is well established that magnetars are neutron stars with extreme magnetic fields and young ages, but the evolutionary pathways to their creation are still uncertain. Since most massive stars are in binaries, if magnetars are a frequent result of core-collapse supernovae, some fractions are expected to have a bound companion at the time of obse…
Tidal star-planet interaction and its observed impact on stellar activity in planet-hosting wide binary systems
Poppenhaeger, K.; Ilic, N.; Hosseini, S. Marzieh
Tidal interaction between an exoplanet and its host star is a possible pathway to transfer angular momentum between the planetary orbit and the stellar spin. In cases where the planetary orbital period is shorter than the stellar rotation period, this may lead to angular momentum being transferred into the star's rotation, possibly counteracting t…
Investigating Galactic binary cluster candidates with Gaia EDR3
Corradi, W. J. B.; Santos, J. F. C.; Maia, F. F. S. +1 more
A number of stellar open cluster (OC) pairs in the Milky Way occupy similar positions in the phase space (coordinates, parallax, and proper motions) and therefore may constitute physically interacting systems. The characterization of such objects based on observational data is a fundamental step towards a proper understanding of their physical sta…
Activity cycles in RS CVn-type stars
Martínez, C. I.; Buccino, A. P.; Mauas, P. J. D.
We compile a list of 120 RS CVn-type stars from the bibliography in Southern hemisphere, to search for rotation periods and activity cycles, covering a large range of luminosities and effective temperatures for late stars. For each system of the list, we use photometric data from the All Sky Automated Survey (ASAS), and complement it with our own …
Stellar multiplicity affects the correlation between protoplanetary disc masses and accretion rates: binaries explain high accretors in Upper Sco
Manara, Carlo F.; Zagaria, Francesco; Rosotti, Giovanni P. +1 more
In recent years, a correlation between mass accretion rates onto new-born stars and their protoplanetary disc masses was detected in nearby young star-forming regions. Although such a correlation can be interpreted as due to viscous-diffusion processes in the disc, highly accreting sources with low disc masses in more evolved regions remain puzzli…
The Magellanic Edges Survey - III. Kinematics of the disturbed LMC outskirts
Da Costa, G. S.; Belokurov, V.; Koposov, S. E. +3 more
We explore the structural and kinematic properties of the outskirts of the Large Magellanic Cloud (LMC) using data from the Magellanic Edges Survey (MagES) and Gaia EDR3. Even at large galactocentric radii (8° < R < 11°), we find the north-eastern LMC disc is relatively unperturbed: its kinematics are consistent with a disc of inclination ~3…
Velocity dispersions of clusters in the Dark Energy Survey Y3 redMaPPer catalogue
Smith, M.; Lidman, C.; Davis, T. M. +97 more
We measure the velocity dispersions of clusters of galaxies selected by the red-sequence Matched-filter Probabilistic Percolation (redMaPPer) algorithm in the first three years of data from the Dark Energy Survey (DES), allowing us to probe cluster selection and richness estimation, λ, in light of cluster dynamics. Our sample consists of 126 clust…
Binary parameters from astrometric and spectroscopic errors - candidate hierarchical triples and massive dark companions in Gaia DR3
Belokurov, Vasily; Evans, N. Wyn; Andrew, Shion +2 more
We show how astrometric and spectroscopic errors introduced by an unresolved binary system can be combined to give estimates of the binary period and mass ratio. This can be performed analytically if we assume we see one or more full orbits over our observational baseline, or numerically for all other cases. We apply this method to Gaia DR3 data, …