Search Publications
MOSEL survey: extremely weak outflows in EoR analogues at z = 3-4
Kewley, Lisa J.; Harshan, Anishya; Kacprzak, Glenn G. +7 more
This paper presents deep K-band spectroscopic observations of galaxies at z = 3 - 4 with composite photometric rest-frame H Β+[O III] 5007 equivalent widths (EW0) > 600 Å, comparable to the EW of galaxies observed during the epoch of reionization (EoR, z > 6). The typical spectroscopic [O III] 5007 EW0 and stellar mass …
Clusters, clouds, and correlations: relating young clusters to giant molecular clouds in M33 and M31
Bell, Eric F.; Skillman, Evan D.; Williams, Benjamin F. +11 more
We use young clusters and giant molecular clouds (GMCs) in the galaxies M33 and M31 to constrain temporal and spatial scales in the star formation process. In M33, we compare the Panchromatic Hubble Andromeda Treasury: Triangulum Extended Region (PHATTER) catalogue of 1214 clusters with ages measured via colour-magnitude diagram (CMD) fitting to 4…
On the degree of dynamical packing in the Kepler multiplanet systems
Tamayo, Daniel; Obertas, Alysa; Murray, Norm
Current planet formation theories rely on initially compact orbital configurations undergoing a (possibly extended) phase of giant impacts following the dispersal of the dissipative protoplanetary disc. The orbital architectures of observed mature exoplanet systems have likely been strongly sculpted by chaotic dynamics, instabilities, and giant im…
Star cluster classification using deep transfer learning with PHANGS-HST
Mobasher, Bahram; Kruijssen, J. M. Diederik; Chevance, Mélanie +17 more
Currently available star cluster catalogues from the Hubble Space Telescope (HST) imaging of nearby galaxies heavily rely on visual inspection and classification of candidate clusters. The time-consuming nature of this process has limited the production of reliable catalogues and thus also post-observation analysis. To address this problem, deep t…
SN 2021fxy: mid-ultraviolet flux suppression is a common feature of Type Ia supernovae
Lundqvist, P.; Suntzeff, N. B.; Wang, L. +26 more
We present ultraviolet (UV) to near-infrared (NIR) observations and analysis of the nearby Type Ia supernova SN 2021fxy. Our observations include UV photometry from Swift/UVOT, UV spectroscopy from HST/STIS, and high-cadence optical photometry with the Swope 1-m telescope capturing intranight rises during the early light curve. Early B - V colours…
Further evidence of the link between activity and metallicity using the flaring properties of stars in the Kepler field
Amard, Louis; See, Victor; Roquette, Julia +1 more
The magnetic activity level of low-mass stars is known to vary as a function of the physical properties of the star. Many studies have shown that the stellar mass and rotation are both important parameters that determine magnetic activity levels. In contrast, the impact of a star's chemical composition on magnetic activity has received comparative…
Comparison of a pebbles-based model with the observed evolution of the water and carbon dioxide outgassing of comet 67P/Churyumov-Gerasimenko
Fulle, M.; Mottola, S.; Bockelée-Morvan, D. +11 more
The Rosetta mission escorted comet 67P/Churyumov-Gerasimenko for approximately two years including the perihelion passage (1.24 au, 2015 August), allowing us to monitor the seasonal evolution of the water and carbon dioxide loss rates. Here, we model 67P/Churyumov-Gerasimenko water and carbon dioxide production as measured by the Rosina experiment…
The interaction of supernova 2018evt with a substantial amount of circumstellar matter - An SN 1997cy-like event
Filippenko, Alexei V.; Baade, Dietrich; Wang, Lifan +29 more
A rare class of supernovae (SNe) is characterized by strong interaction between the ejecta and several solar masses of circumstellar matter (CSM) as evidenced by strong Balmer-line emission. Within the first few weeks after the explosion, they may display spectral features similar to overluminous Type Ia SNe, while at later phase their observation…
The value-added catalogue of ASAS-SN eclipsing binaries - II. Properties of extra-physics systems
Kochanek, C. S.; Stanek, K. Z.; Thompson, Todd A. +6 more
Detached eclipsing binaries are the primary tool used to measure precise masses and radii of stars. In our previous paper estimating the parameters of more than 30 000 detached eclipsing binaries, we identified 766 eclipsing binaries with additional features in their All-Sky Automated Survey for Supernovae (ASAS-SN) and Transiting Exoplanet Survey…
Decoding the compositions of four bright r-process-enhanced stars
Beers, Timothy C.; Sivarani, Thirupathi; Allende Prieto, Carlos +3 more
There has been a concerted effort in recent years to identify the astrophysical sites of the r-process that can operate early in the galaxy. The discovery of many r-process-enhanced (RPE) stars (especially by the R-process Alliance collaboration) has significantly accelerated this effort. However, only limited data exist on the detailed elemental …