Search Publications
Accounting for differential rotation in calculations of the Sun's angular momentum-loss rate
Brun, A. S.; Finley, A. J.
Context. Sun-like stars shed angular momentum due to the presence of magnetised stellar winds. Magnetohydrodynamic models have been successful in exploring the dependence of this `wind-braking torque' on various stellar properties; however the influence of surface differential rotation is largely unexplored. As the wind-braking torque depends on t…
The JWST view of the barred galaxy population in the SMACS0723 galaxy cluster
Costantin, L.; Méndez-Abreu, J.; Kruk, S.
Context. The cosmic evolution of the barred galaxy population provides key information about the secular evolution of galaxies and the settling of rotationally dominated discs.
Aims: We study the bar fraction in the SMACSJ0723.37323 (SMACS0723) cluster of galaxies at z = 0.39 using the Early Release Observations obtained with the NIRCam instr…
Reconstructing the extended structure of multiple sources strongly lensed by the ultra-massive elliptical galaxy SDSS J0100+1818
Grillo, C.; Christensen, L.; Suyu, S. H. +2 more
We study the total and baryonic mass distributions of the deflector SDSS J0100+1818 through a full strong lensing analysis. The system is composed of an ultra-massive early-type galaxy at z = 0.581, with a total stellar mass of (1.5 ± 0.3)×1012 M⊙ and a stellar velocity dispersion of (450 ± 40) km s−1, surrounded b…
The Kormendy relation of early-type galaxies as a function of wavelength in Abell S1063, MACS J0416.1-2403, and MACS J1149.5+2223
Grillo, C.; Rosati, P.; Vanzella, E. +9 more
Context. The wavelength dependence of the projection of the fundamental plane along the velocity dispersion axis, namely the Kormendy relation, is well characterised at low redshift but poorly studied at intermediate redshifts. The Kormendy relation provides information on the evolution of the population of early-type galaxies (ETGs). Therefore, b…
Planets around evolved intermediate-mass stars. III. Planet candidates and long-term activity signals in six open clusters
Sousa, S. G.; Lovis, C.; Santos, N. C. +6 more
Context. We carried out a long-term campaign spanning 17 year to obtain high-precision radial velocities (RVs) with the HARPS spectrograph for a large sample of evolved stars in open clusters.
Aims: The aim of this work is to search for planets around evolved stars, with a special focus on stars more massive than 2 M⊙ in light of p…
SoloHI observations of coronal mass ejections observed by multiple spacecraft
Howard, R. A.; Hess, P.; Stenborg, G. +2 more
Context. The Solar Orbiter Heliospheric Imager (SoloHI) instrument of the Solar Orbiter mission is a next-generation heliospheric imager. New observations from SoloHI demonstrate the improved spatial and temporal resolution compared to previous observations of the heliosphere and corona. At perihelion, the field of view (FoV) of SoloHI covers the …
Detection of single-degenerate massive binaries with Gaia: The impact of blue supergiants, triples, mass precision, and high-precision parallax requirements
Shenar, T.; Sana, H.; Marchant, P. +1 more
Context. X-ray-quiet single-degenerate massive binaries are notoriously difficult to detect, and only a few have been identified so far. Yet, recent investigations have shown that hundreds of black holes (BHs) with massive main-sequence (MS) companions (OB+BHs) might be identifiable from Gaia astrometry by using the astrometric mass-ratio function…
Detection of seven 2+2 doubly eclipsing quadruple systems
Merc, J.; Mašek, M.; Kučáková, H. +4 more
In this work, we study a heterogeneous group of seven stellar systems for the first time. Despite their different distances or spectral types, all of them belong to a very rare group of quadruple systems of 2+2 architecture, where both of the inner pairs harbor eclipsing binaries. These systems are: ASASSN-V J102911.57−522413.6 (inner periods 0.57…
Gravitational collapse and accretion flows in the hub filament system G323.46-0.08
Li, Dalei; Tang, Xindi; Zhou, Jianjun +9 more
We studied the hub-filament system G323.46-0.08 based on archival molecular line data from the SEDIGISM 13CO survey and infrared data from the GLIMPSE, MIPS, and Hi-GAL surveys. G323.46-0.08 consists of three filaments, F-north, F-west, and F-south, that converge toward the central high-mass clump AGAL 323.459-0.079. F-west and Part1 of…
Variation in optical and infrared properties of galaxies in relation to their surface brightness
Boquien, M.; Małek, K.; Koda, J. +12 more
Although it is now recognized that low surface brightness galaxies (LSBs) constitute a large fraction of the number density of galaxies, many of their properties are still poorly known. Based on only a few studies, LSBs are often considered to be "dust poor", that is, with a very low amount of dust. For the first time, we use a large sample of LSB…