Search Publications
Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey. I. Confirmation of an Eccentric, Cool Jupiter with an Interior Earth-sized Planet Orbiting Kepler-1514
Vanderburg, Andrew; Kane, Stephen R.; Howard, Andrew W. +9 more
Despite the severe bias of the transit method of exoplanet discovery toward short orbital periods, a modest sample of transiting exoplanets with orbital periods greater than 100 days is known. Long-term radial velocity (RV) surveys are pivotal to confirming these signals and generating a set of planetary masses and densities for planets receiving …
Cluster After 20 Years of Operations: Science Highlights and Technical Challenges
Escoubet, C. P.; Bogdanova, Y. V.; Goldstein, M. L. +7 more
The Cluster mission was the first constellation using four identical spacecraft to study Sun-Earth connection plasma processes. Using four spacecraft in a tetrahedron shape, it could measure, for the first time, 3D quantities such as electrical currents, plasma gradients or divergence of the electron pressure tensor and 3D structures such as bound…
Constraining the cosmic UV background at z > 3 with MUSE Lyman-α emission observations
Richard, Johan; Marino, Raffaella Anna; Wisotzki, Lutz +10 more
The intensity of the Cosmic UV background (UVB), coming from all sources of ionizing photons such as star-forming galaxies and quasars, determines the thermal evolution and ionization state of the intergalactic medium (IGM) and is, therefore, a critical ingredient for models of cosmic structure formation. Most of the previous estimates are based o…
TOI 122b and TOI 237b: Two Small Warm Planets Orbiting Inactive M Dwarfs Found by TESS
Latham, David W.; Ziegler, Carl; Collins, Karen A. +39 more
We report the discovery and validation of TOI 122b and TOI 237b, two warm planets transiting inactive M dwarfs observed by the Transiting Exoplanet Survey Satellite (TESS). Our analysis shows that TOI 122b has a radius of 2.72 ± 0.18 R⊕ and receives 8.8 ± 1.0 times Earth's bolometric insolation, and TOI 237b has a radius of 1.44±0.12 R<…
A possible bright ultraviolet flash from a galaxy at redshift z ≈ 11
Ho, Luis C.; Jiang, Linhua; Cai, Zheng +8 more
In the optical sky, minutes-duration transients from cosmological distances are rare. Known objects that give rise to such transients include gamma-ray bursts (GRBs), the most luminous explosions in the Universe1 that have been detected at redshifts as high as z ≈ 9.4 (refs. 2-4). These high-redshift GRBs and their associated…
Modelling rebrightenings, reflares, and echoes in dwarf nova outbursts
Hameury, J. -M.; Lasota, J. -P.
Context. The disc instability model (DIM) accounts well for most of the observed properties of dwarf novae and soft X-ray transients, but the rebrightenings, reflares, and echoes occurring at the end of outbursts or shortly after in WZ Sge stars or soft X-ray transients have not yet been convincingly explained by any model.
Aims: We determine…
Mapping the "invisible" circumgalactic medium around a z ∼ 4.5 radio galaxy with MUSE
Lehnert, Matthew D.; De Breuck, Carlos; Wylezalek, Dominika +5 more
In this paper we present Multi Unit Spectroscopic Explorer integral field unit spectroscopic observations of the ∼70 × 30 kpc2 Lyα halo around the radio galaxy
Investigating point sources in MWC 758 with SPHERE
Ménard, F.; Pantin, E.; Ginski, C. +26 more
Context. Spiral arms in protoplanetary disks could be shown to be the manifestation of density waves launched by protoplanets and propagating in the gaseous component of the disk. At least two point sources have been identified in the L band in the MWC 758 system as planetary mass object candidates.
Aims: We used VLT/SPHERE to search for coun…
Hard X-ray selected giant radio galaxies - III. The LOFAR view
Venturi, T.; Dallacasa, D.; Ubertini, P. +12 more
Giant radio galaxies (GRGs), with extended structures reaching hundreds of kpc, are among the most spectacular examples of ejection of relativistic plasma from supermassive black holes. In this work, third of a series, we present Low-Frequency Array (LOFAR) images at 144 MHz, collected in the framework of the LOFAR Two-metre Sky Survey Data Releas…
Simulating the Coronal Evolution of Bipolar Active Regions to Investigate the Formation of Flux Ropes
Green, L. M.; Yardley, S. L.; Mackay, D. H.
The coronal magnetic field evolution of 20 bipolar active regions (ARs) is simulated from their emergence to decay using the time-dependent nonlinear force-free field method of Mackay, Green, and van Ballegooijen (Astrophys. J. 729, 97, 2011). A time sequence of cleaned photospheric line-of-sight magnetograms, which covers the entire evolution of …