Search Publications
Modelling the orbital histories of satellites of Milky Way-mass galaxies: testing static host potentials against cosmological simulations
Wetzel, Andrew; Sanderson, Robyn E.; Patel, Ekta +3 more
Understanding the evolution of satellite galaxies of the Milky Way (MW) and M31 requires modelling their orbital histories across cosmic time. Many works that model satellite orbits incorrectly assume or approximate that the host halo gravitational potential is fixed in time and is spherically symmetric or axisymmetric. We rigorously benchmark the…
Seven classes of rotational variables from a study of 50 000 spotted stars with ASAS-SN, Gaia, and APOGEE
Kochanek, C. S.; Pinsonneault, Marc; Cao, Lyra +4 more
We examine the properties of ~50 000 rotational variables from the ASAS-SN survey using distances, stellar properties, and probes of binarity from Gaia DR3 and the SDSS APOGEE survey. They have higher amplitudes and span a broader period range than previously studied Kepler rotators. We find they divide into three groups of main sequence stars (MS…
A low-mass helium star progenitor model for the Type Ibn SN 2020nxt
Van Dyk, Schuyler D.; Filippenko, Alexei V.; Chambers, Kenneth C. +55 more
A growing number of supernovae (SNe) are now known to exhibit evidence for significant interaction with a dense, pre-existing, circumstellar medium (CSM). SNe Ibn comprise one such class that can be characterized by both rapidly evolving light curves and persistent narrow He I lines. The origin of such a dense CSM in these systems remains a pressi…
The Milky Way bar pattern speed using Hercules and Gaia DR3
Aguerri, J. Alfonso L.; D'Onghia, Elena; Lucchini, Scott
The distribution of moving groups in the solar neighbourhood has been used to constrain dynamical properties of the Milky Way for decades. The kinematic bimodality between the main mode (Hyades, Pleiades, Coma Berenices, and Sirius) and Hercules can be explained by two different bar models - via the outer Lindblad resonance of a bar with a high pa…
High dust content of a quiescent galaxy at z 2 revealed by deep ALMA observation
Übler, Hannah; Steidel, Charles C.; Price, Sedona H. +9 more
We report the detection of cold dust in an apparently quiescent massive galaxy (log (M⋆/M⊙) ≈ 11) at z ~ 2 (G4). The source is identified as a serendipitous 2 mm continuum source in a deep ALMA observation within the field of Q2343-BX610, a z = 2.21 massive star-forming disc galaxy. Available multiband photometry of G4 sugges…
Dark energy survey year 3 results: miscentring calibration and X-ray-richness scaling relations in redMaPPer clusters
Bacon, D.; Smith, M.; Davis, T. M. +77 more
We use Dark Energy Survey Year 3 (DES Y3) clusters with archival XMM-Newton and Chandra X-ray data to assess the centring performance of the redMaPPer cluster finder and to measure key richness observable scaling relations. We find that 10-20 per cent of redMaPPer clusters are miscentred, both when comparing to the X-ray peak position and to the v…
The evolution of catastrophically evaporating rocky planets
Owen, James E.; Curry, Alfred; Booth, Richard +1 more
In this work, we develop a rocky planet interior model and use it to investigate the evolution of catastrophically evaporating rocky exoplanets. These planets, detected through the dust tails produced by evaporative outflows from their molten surfaces, can be entirely destroyed in a fraction of their host star's lifetime. To allow for the major de…
The sizes of bright Lyman-break galaxies at z ≃ 3-5 with JWST PRIMER
Bowler, R. A. A.; Dunlop, J. S.; Koekemoer, A. M. +8 more
We use data from the JWST Public Release IMaging for Extragalactic Research survey to measure the size scaling relations of 1668 rest-frame UV-bright Lyman-break galaxies (LBGs) at
Did the Gaia Enceladus/Sausage merger form the Milky Way's bar?
Grand, Robert J. J.; Fragkoudi, Francesca; Merrow, Alex +1 more
The Milky Way's last significant merger, the Gaia Enceladus/Sausage (GES), is thought to have taken place between $8\hbox{ and }11\, \mathrm{Gyr}$ ago. Recent studies in the literature suggest that the bar of the Milky Way is rather old, indicating that it formed at a similar epoch to the GES merger. We investigate the possible link between these …
A 1.55 R⊕ habitable-zone planet hosted by TOI-715, an M4 star near the ecliptic South Pole
Triaud, Amaury H. M. J.; Latham, David W.; Stassun, Keivan G. +48 more
A new generation of observatories is enabling detailed study of exoplanetary atmospheres and the diversity of alien climates, allowing us to seek evidence for extraterrestrial biological and geological processes. Now is therefore the time to identify the most unique planets to be characterized with these instruments. In this context, we report on …