Search Publications
Missions
Journals
Publication Years
Radii of young star clusters in nearby galaxies
Gnedin, Oleg Y.; Brown, Gillen
We measure the projected half-light radii of young star clusters in 31 galaxies from the Legacy Extragalactic UV Survey (LEGUS). We implement a custom pipeline specifically designed to be robust against contamination, which allows us to measure radii for 6097 clusters. This is the largest sample of young star cluster radii currently available. We …
Validation of the accuracy and precision of Gaia EDR3 parallaxes with globular clusters
Maíz Apellániz, J.; Barbá, R. H.; Pantaleoni González, M.
Context. The recent early third data release (EDR3) from the Gaia mission has produced parallaxes for 1.468 × 109 sources with better quality than those reported in the previous data release. Nevertheless, there are calibration issues with the data that require corrections to the published values and uncertainties.
Aims: We want to…
The Solar Neighborhood XLVIII: Nine Giant Planets Orbiting Nearby K Dwarfs, and the CHIRON Spectrograph's Radial Velocity Performance
Gies, Douglas R.; Quinn, Samuel N.; Henry, Todd J. +5 more
We report initial results of a large radial velocity survey of K dwarfs up to a distance of 50 pc from the solar system, to look for stellar, brown dwarf, and Jovian planets using radial velocities from the CHIRON spectrograph on the CTIO/SMARTS 1.5 m telescope. We identify three new exoplanet candidates orbiting host stars in the K dwarf survey a…
Magnetohydrodynamic Waves in Open Coronal Structures
Tian, H.; Wang, T. J.; Banerjee, D. +8 more
Modern observatories have revealed the ubiquitous presence of magnetohydrodynamic waves in the solar corona. The propagating waves (in contrast to the standing waves) are usually originated in the lower solar atmosphere which makes them particularly relevant to coronal heating. Furthermore, open coronal structures are believed to be the source reg…
The Abell 3391/95 galaxy cluster system. A 15 Mpc intergalactic medium emission filament, a warm gas bridge, infalling matter clumps, and (re-) accelerated plasma discovered by combining SRG/eROSITA data with ASKAP/EMU and DECam data
Diego, J. M.; Salvato, M.; Nandra, K. +44 more
Context. Inferences about dark matter, dark energy, and the missing baryons all depend on the accuracy of our model of large-scale structure evolution. In particular, with cosmological simulations in our model of the Universe, we trace the growth of structure, and visualize the build-up of bigger structures from smaller ones and of gaseous filamen…
A self-lensing binary massive black hole interpretation of quasi-periodic eruptions
Ingram, Adam; Aigrain, Suzanne; Motta, Sara E. +1 more
Binary supermassive black hole (SMBH) systems result from galaxy mergers, and will eventually coalesce due to gravitational wave (GW) emission if the binary separation can be reduced to ≲0.1 pc by other mechanisms. Here, we explore a gravitational self-lensing binary SMBH model for the sharp (duration ~1 h), quasi-regular X-ray flares - dubbed qua…
In situ multi-spacecraft and remote imaging observations of the first CME detected by Solar Orbiter and BepiColombo
Möstl, C.; Harrison, R. A.; Davies, J. A. +20 more
Context. On 2020 April 19 a coronal mass ejection (CME) was detected in situ by Solar Orbiter at a heliocentric distance of about 0.8 AU. The CME was later observed in situ on April 20 by the Wind and BepiColombo spacecraft whilst BepiColombo was located very close to Earth. This CME presents a good opportunity for a triple radial alignment study,…
Stellar Rotation in the Gaia Era: Revised Open Clusters' Sequences
Pinsonneault, Marc H.; Godoy-Rivera, Diego; Rebull, Luisa M.
The period versus mass diagrams (i.e., rotational sequences) of open clusters provide crucial constraints for angular momentum evolution studies. However, their memberships are often heavily contaminated by field stars, which could potentially bias the interpretations. In this paper, we use data from Gaia DR2 to reassess the memberships of seven o…
Evolution of Solar Wind Turbulence from 0.1 to 1 au during the First Parker Solar Probe-Solar Orbiter Radial Alignment
Telloni, Daniele; Zank, Gary P.; Adhikari, Laxman +41 more
The first radial alignment between Parker Solar Probe and Solar Orbiter spacecraft is used to investigate the evolution of solar wind turbulence in the inner heliosphere. Assuming ballistic propagation, two 1.5 hr intervals are tentatively identified as providing measurements of the same plasma parcels traveling from 0.1 to 1 au. Using magnetic fi…
MUSE analysis of gas around galaxies (MAGG) - III. The gas and galaxy environment of z = 3-4.5 quasars
Fynbo, J. P. U.; Fossati, M.; Lusso, E. +9 more
We present a study of the environment of 27 z = 3-4.5 bright quasars from the MUSE Analysis of Gas around Galaxies (MAGG) survey. With medium-depth Multi Unit Spectroscopic Explorer (MUSE) observations (4 h on target per field), we characterize the effects of quasars on their surroundings by studying simultaneously the properties of extended gas n…