Search Publications
Progenitor and close-in circumstellar medium of type II supernova 2020fqv from high-cadence photometry and ultra-rapid UV spectroscopy
Pérez-Fournon, I.; Poidevin, F.; Shirley, R. +35 more
We present observations of SN 2020fqv, a Virgo-cluster type II core-collapse supernova (CCSN) with a high temporal resolution light curve from the Transiting Exoplanet Survey Satellite (TESS) covering the time of explosion; ultraviolet (UV) spectroscopy from the Hubble Space Telescope (HST) starting 3.3 d post-explosion; ground-based spectroscopic…
The early Universe was dust-rich and extremely hot
Moncelsi, Lorenzo; Sun, Guochao; Viero, Marco P. +2 more
We investigate the dust properties and star-formation signature of galaxies in the early Universe by stacking 111 227 objects in the recently released COSMOS catalogue on maps at wavelengths bracketing the peak of warmed dust emission. We find an elevated far-infrared luminosity density to redshift 8, indicating abundant dust in the early Universe…
The Connection Between Galactic Outflows and the Escape of Ionizing Photons
Chisholm, John; Rigby, Jane R.; Bayliss, Matthew +13 more
We analyze spectra of a gravitationally lensed galaxy, known as the Sunburst Arc, that is leaking ionizing photons, also known as the Lyman continuum (LyC). Magnification from gravitational lensing permits the galaxy to be spatially resolved into one region that leaks ionizing photons and several that do not. Rest-frame UV and optical spectra from…
Euclid preparation. XIII. Forecasts for galaxy morphology with the Euclid Survey using deep generative models
Cimatti, A.; Schultheis, M.; Baccigalupi, C. +194 more
We present a machine learning framework to simulate realistic galaxies for the Euclid Survey, producing more complex and realistic galaxies than the analytical simulations currently used in Euclid. The proposed method combines a control on galaxy shape parameters offered by analytic models with realistic surface brightness distributions learned fr…
Diagnosing DASH: A Catalog of Structural Properties for the COSMOS-DASH Survey
van Dokkum, Pieter G.; Franx, Marijn; Muzzin, Adam +16 more
We present the H 160 morphological catalogs for the COSMOS-DASH survey, the largest area near-IR survey using HST-WFC3 to date. Utilizing the "Drift And SHift" observing technique for HST-WFC3 imaging, the COSMOS-DASH survey imaged approximately 0.5 deg2 of the UltraVISTA deep stripes (0.7 deg2, when combined with …
Triply eclipsing triple stars in the northern TESS fields: TICs 193993801, 388459317, and 52041148
Mitnyan, T.; Pál, A.; Vanderburg, A. +23 more
In this work we report the discovery and analysis of three new triply eclipsing triple star systems found with the TESS mission during its observations of the northern skies: TICs 193993801, 388459317, and 52041148. We utilized the TESS precision photometry of the binary eclipses and third-body eclipsing events, ground-based archival and follow-up…
HR 6819 is a binary system with no black hole. Revisiting the source with infrared interferometry and optical integral field spectroscopy
Rivinius, Th.; Baade, D.; Shenar, T. +16 more
Context. Two scenarios have been proposed to match the existing observational constraints of the object HR 6819. The system could consist of a close inner B-type giant plus a black hole (BH) binary with an additional Be companion in a wide orbit. Alternatively, it could be a binary composed of a stripped B star and a Be star in a close orbit. Eith…
Star formation characteristics of CNN-identified post-mergers in the Ultraviolet Near Infrared Optical Northern Survey (UNIONS)
Ellison, Sara L.; Gwyn, Stephen; Hudson, Michael J. +3 more
The importance of the post-merger epoch in galaxy evolution has been well documented, but post-mergers are notoriously difficult to identify. While the features induced by mergers can sometimes be distinctive, they are frequently missed by visual inspection. In addition, visual classification efforts are highly inefficient because of the inherent …
LoTSS jellyfish galaxies. III. The first identification of jellyfish galaxies in the Perseus cluster
Botteon, A.; van Weeren, R. J.; Ignesti, A. +4 more
In this paper we report the first identification of jellyfish galaxies in the Perseus cluster (Abell 426). We identified four jellyfish galaxies (LEDA 2191078, MCG +07-07-070, UGC 2654, UGC 2665) within the central 2° ×2° (2.6 Mpc × 2.6 Mpc) of Perseus based on the presence of one-sided radio continuum tails that were detected at 144 MHz by the LO…
Constraining Galaxy Overdensities around Three z 6.5 Quasars with ALMA and MUSE
Li, Qiong; Walter, Fabian; Meyer, Romain A. +6 more
We quantify galaxy overdensities around three high-redshift quasars with known [C II]158 µm companions: PJ231-20 (z = 6.59), PJ308-21 (z = 6.24), and J0305-3150 (z = 6.61). Recent SCUBA2 imaging revealed the presence of 17 submillimeter galaxies (SMGs) with sky separations 0.'7 < θ < 2.'4 from these three quasars. We present…