Search Publications
Catalogue of solar-like oscillators observed by TESS in 120-s and 20-s cadence
Li, Yaguang; Chaplin, William J.; Davies, Guy R. +12 more
Context. The Transiting Exoplanet Survey Satellite (TESS) mission has provided photometric light curves for stars across nearly the entire sky. This allows for the application of asteroseismology to a pool of potential solar-like oscillators that is unprecedented in size.
Aims: We aim to produce a catalogue of solar-like oscillators observed …
Type II radio bursts and their association with coronal mass ejections in solar cycles 23 and 24
Kilpua, E. K. J.; Kumari, A.; Morosan, D. E. +1 more
Context. Meter-wavelength type II solar radio bursts are thought to be the signatures of shock-accelerated electrons in the corona. Studying these bursts can give information about the initial kinematics, dynamics, and energetics of coronal mass ejections (CMEs) in the absence of white-light observations.
Aims: We investigate the occurrence o…
SN 2020qlb: A hydrogen-poor superluminous supernova with well-characterized light curve undulations
Sollerman, J.; Bloom, J. S.; Omand, C. M. B. +21 more
Context. SN 2020qlb (ZTF20abobpcb) is a hydrogen-poor superluminous supernova (SLSN-I) that is among the most luminous (maximum Mg = −22.25 mag) and that has one of the longest rise times (77 days from explosion to maximum). We estimate the total radiated energy to be > 2.1 × 1051 erg. SN 2020qlb has a well-sampled light c…
Observational constraints on the origin of the elements. V. NLTE abundance ratios of [Ni/Fe] in Galactic stars and enrichment by sub-Chandrasekhar mass supernovae
Ruiter, A. J.; Seitenzahl, I. R.; Bergemann, M. +4 more
Aims: We constrain the role of different Type Ia supernova (SN Ia) channels in the chemical enrichment of the Galaxy by studying the abundances of nickel in Galactic stars. We investigated four different SN Ia sub-classes, including the classical single-degenerate near-Chandrasekhar mass (Mch) SN Ia, the fainter SN Iax systems asso…
Clumping and X-rays in cooler B supergiant stars
Bouret, J. -C.; Oskinova, L. M.; Sander, A. A. C. +6 more
Context. B supergiants (BSGs) are evolved stars with effective temperatures between ~10 to ~30 kK. Knowing the properties of these objects is important to understand massive star evolution. Located on the cool end of the line-driven wind regime, the study of their atmospheres can help us to understand the physics of their winds and phenomena such …
New compact hierarchical triple system candidates identified using Gaia DR3
Mitnyan, T.; Pál, A.; Borkovits, T. +5 more
Aims: We introduce a novel way to identify new compact hierarchical triple stars by exploiting the huge potential of Gaia DR3 and also its future data releases. We aim to increase the current number of compact hierarchical triple systems significantly.
Methods: We used several eclipsing binary catalogs from different sky surveys that lis…
The Planck clusters in the LOFAR sky. III. LoTSS-DR2: Dynamic states and density fluctuations of the intracluster medium
Simionescu, A.; Kaastra, J. S.; Zhang, X. +19 more
Context. The footprint of the recent second data release of the LOFAR Two-metre Sky Survey (LoTSS-DR2) covers 309 Planck Sunyaev-Zeldovich (SZ) selected galaxy clusters, 83 of which host a radio halo and 26 host a radio relic(s). It provides an excellent opportunity to statistically study the properties of extended cluster radio sources, especiall…
The Enhanced Resolution Imager and Spectrograph for the VLT
Lutz, D.; Förster Schreiber, N. M.; Genzel, R. +82 more
The Enhanced Resolution Imager and Spectrograph (ERIS) is an instrument that both extends and enhances the fundamental diffraction limited imaging and spectroscopy capability for the VLT. It replaces two instruments that were being maintained beyond their operational lifetimes, combines their functionality on a single focus, provides a new wavefro…
Rotation and interaction of the CMEs of September 8 and 10, 2014, tested with EUHFORIA
Poedts, Stefaan; Scolini, Camilla; Schmieder, Brigitte +1 more
Context. Solar coronal mass ejections (CMEs) can catch up and interact with preceding CMEs and solar wind structures to undergo rotation and deflection during their propagation. Aim. We aim to show how the interactions of a CME in the corona and heliosphere can play a significant role in altering its geoeffectiveness as predicted at the time of it…
A mini-chemical scheme with net reactions for 3D general circulation models. II. 3D thermochemical modelling of WASP-39b and HD 189733b
Hammond, Mark; Lee, Elspeth K. H.; Tan, Xianyu +1 more
Context. The chemical inventory of hot Jupiter (HJ) exoplanet atmospheres continues to be observed by various ground- and space-based instruments in increasing detail and precision. It is expected for some HJs to exhibit strong non-equilibrium chemistry characteristics in their atmospheres, which might be inferred from spectral observations.
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