Search Publications
The DBL Survey I: discovery of 34 double-lined double white dwarf binaries
Toonen, Silvia; Pelisoli, Ingrid; Munday, James +8 more
We present the first discoveries of the double-lined double white dwarf (DBL) survey that targets overluminous sources with respect to the canonical white dwarf cooling sequence according to a set of well-defined criteria. The primary goal of the DBL survey is to identify compact double white dwarf binary star systems from a unique spectral detect…
The MAGPI survey: evolution of radial trends in star formation activity across cosmic time
Ellison, Sara L.; Gupta, Anshu; Mendel, J. Trevor +19 more
Using adaptive optics with the Multi-Unit Spectroscopic Explorer on the Very Large Telescope, the Middle Ages Galaxy Properties with Integral Field Spectroscopy survey allows us to study the spatially resolved Universe at a crucial time of ~4 Gyr ago (z ~ 0.3) when simulations predict the greatest diversity in evolutionary pathways for galaxies. W…
VIRA: an exoplanet atmospheric retrieval framework for JWST transmission spectroscopy
Madhusudhan, Nikku; Constantinou, Savvas
JWST observations are leading to important new insights into exoplanetary atmospheres through transmission spectroscopy. In order to harness the full potential of the broad spectral range and high sensitivity of JWST, atmospheric retrievals of exoplanets require a high level of robustness and accuracy in the underlying models. We present the VIRA …
Survival in the Neptune desert: LTT 9779 b kept its atmosphere thanks to an unusually X-ray faint host star
Fernández Fernández, Jorge; Wheatley, Peter J.; Jenkins, James S. +1 more
The Neptunian desert is a region in period-radius parameter space with very few Neptune-sized planets at short orbital periods. Amongst these, LTT 9779 b is the only known Neptune with a period shorter than 1 d to retain a significant H-He atmosphere. If the Neptune desert is the result of X-ray/EUV-driven photoevaporation, it is surprising that t…
A hot mini-Neptune and a temperate, highly eccentric sub-Saturn around the bright K-dwarf TOI-2134
Deleuil, M.; Vanderburg, A.; Winn, J. N. +64 more
We present the characterization of an inner mini-Neptune in a 9.2292005 ± 0.0000063 d orbit and an outer mono-transiting sub-Saturn planet in a 95.50$^{+0.36}_{-0.25}$ d orbit around the moderately active, bright (mv = 8.9 mag) K5V star TOI-2134. Based on our analysis of five sectors of TESS data, we determine the radii of TOI-2134b and…
101 eclipsing quadruple star candidates discovered in TESS full frame images
Kostov, Veselin B.; Powell, Brian P.; Rappaport, Saul A. +17 more
We present our second catalogue of quadruple star candidates, containing 101 systems discovered in TESS Full-Frame Image data. The targets were initially detected as eclipsing binary stars with the help of supervised machine learning methods applied to sectors (Sectors 1 through 54). A dedicated team of citizen scientists subsequently identified t…
Galaxy clustering at cosmic dawn from JWST/NIRCam observations to redshift z 11
Boyett, Kristan; Trenti, Michele; Leethochawalit, Nicha +1 more
We report measurements of the galaxy two-point correlation function at cosmic dawn, using photometrically selected sources from the JWST Advanced Deep Extragalactic Survey (JADES). The JWST/NIRCam data set comprises approximately $N_g \simeq 7000$ photometrically selected Lyman Break Galaxies (LBGs), spanning in the redshift range $5\le z\lt 11$. …
Origin of the correlation between stellar kinematics and globular cluster system richness in ultradiffuse galaxies
Forbes, Duncan A.; Romanowsky, Aaron J.; Brodie, Jean P. +9 more
Observational surveys have found that the dynamical masses of ultradiffuse galaxies (UDGs) correlate with the richness of their globular cluster (GC) system. This could be explained if GC-rich galaxies formed in more massive dark matter haloes. We use simulations of galaxies and their GC systems from the E-MOSAICS project to test whether the simul…
The classical T Tauri star CI Tau observed with SPIRou: magnetospheric accretion and planetary formation
Moutou, C.; Ménard, F.; Carmona, A. +15 more
We report new observations of the classical T Tauri star CI Tau with the SPIRou near-infrared spectropolarimeter and velocimeter at the Canada-France-Hawaii Telescope (CFHT) in late 2019, 2020, and 2022, complemented with observations obtained with the ESPaDOnS optical spectropolarimeter at CFHT in late 2020. From our SPIRou and ESPaDOnS spectra, …
EPOCHS Paper - VIII. An insight into MIRI-selected galaxies in SMACS-0723 and the benefits of deep MIRI photometry in revealing AGN and the dusty universe
Conselice, Christopher J.; Li, Qiong; Ferreira, Leonardo +7 more
We present the analysis of the stellar population and star formation history of 181 MIRI selected galaxies at z = 0 - 3.5 in the massive galaxy cluster field SMACS J0723.3-7327, commonly referred to as SMACS0723, using the JWST Mid-Infrared Instrument (MIRI). We combine the data with the JWST Near Infrared Camera (NIRCam) catalogue, in conjunction…