Search Publications
The IRX-β relation of high-redshift galaxies
Faucher-Giguère, Claude-André; Hayward, Christopher C.; Narayanan, Desika +5 more
The relation between infrared excess (IRX) and UV spectral slope (βUV) is an empirical probe of dust properties of galaxies. The shape, scatter, and redshift evolution of this relation are not well understood, however, leading to uncertainties in estimating the dust content and star formation rates (SFRs) of galaxies at high redshift. I…
A Solar System formation analogue in the Ophiuchus star-forming complex
Alves, João; Lin, Douglas N. C.; Forbes, John C.
Anomalies among the daughter nuclei of the extinct short-lived radionuclides in calcium-aluminium-rich inclusions indicate that the Solar System must have been born near a source of the short-lived radionuclides so that they could be incorporated before they decayed away1. γ-rays from one such living short-lived radionuclide, 26
Gaia search for stellar companions of TESS Objects of Interest II
Mugrauer, Markus; Michel, Kai-Uwe
We present the latest results of our ongoing multiplicity study of (Community) TESS Objects of Interest, using astro- and photometric data from the ESA-Gaia mission, to detect stellar companions of these stars and to characterize their properties. In total, 107 binary, 5 hierarchical triple star systems, as well as one quadruple system were detect…
Assessing the Predictability of Solar Energetic Particles with the Use of Machine Learning Techniques
Lavasa, E.; Giannopoulos, G.; Papaioannou, A. +5 more
A consistent approach for the inherently imbalanced problem of solar energetic particle (SEP) events binary prediction is being presented. This is based on solar flare and coronal mass ejection (CME) data and combinations of both thereof. We exploit several machine learning (ML) and conventional statistics techniques to predict SEPs. The methods u…
Small Volcanic Vents of the Tharsis Volcanic Province, Mars
Richardson, J. A.; Bleacher, J. E.; Connor, C. B. +1 more
Distributed style volcanism is an end member of terrestrial volcanism that produces clusters of small volcanoes when isolated magma bodies ascend from broad magma source regions. Volcano clusters can develop over millions of years, one volcano at a time, and can be used to infer unobserved geologic phenomena, including subsurface stresses and crac…
The star cluster age function in the Galactic disc with Gaia DR2. Fewer old clusters and a low cluster formation efficiency
Cantat-Gaudin, Tristan; Gieles, Mark; Anders, Friedrich +4 more
We perform a systematic reanalysis of the age distribution of Galactic open star clusters. Using a catalogue of homogeneously determined ages for 834 open clusters contained in a 2 kpc cylinder around the Sun and characterised with astrometric and photometric data from the Gaia satellite, we find that it is necessary to revise earlier works that r…
An Energy Inventory of Tidal Disruption Events
Ramirez-Ruiz, Enrico; Mockler, Brenna
Tidal disruption events (TDEs) offer a unique opportunity to study a single supermassive black hole (SMBH) under feeding conditions that change over timescales of days to months. However, the primary mechanism for generating luminosity during the flares remains debated. Despite the increasing number of observed TDEs, it is unclear whether most of …
Curlometer Technique and Applications
Eastwood, J. P.; Dunlop, M. W.; Shen, C. +9 more
We review the range of applications and use of the curlometer, initially developed to analyze Cluster multi-spacecraft magnetic field data; but more recently adapted to other arrays of spacecraft flying in formation, such as MMS small-scale, 4-spacecraft configurations; THEMIS close constellations of 3-5 spacecraft, and Swarm 2-3 spacecraft config…
The ZTF Source Classification Project - II. Periodicity and variability processing metrics
Duev, Dmitry A.; Riddle, Reed; Mróz, Przemek +22 more
The current generation of all-sky surveys is rapidly expanding our ability to study variable and transient sources. These surveys, with a variety of sensitivities, cadences, and fields of view, probe many ranges of time-scale and magnitude. Data from the Zwicky Transient Facility (ZTF) yields an opportunity to find variables on time-scales from mi…
The census of dense cores in the Serpens region from the Herschel Gould Belt Survey
Arzoumanian, D.; Könyves, V.; Bontemps, S. +13 more
The Herschel Gould Belt survey mapped the nearby (d < 500 pc) star-forming regions to understand better how the prestellar phase influences the star formation process. Here, we report a complete census of dense cores in a ~15 deg2 area of the Serpens star-forming region located between d ~ 420 and 484 pc. The PACS and SPIRE cameras i…