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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…
VLTI/GRAVITY Observations and Characterization of the Brown Dwarf Companion HD 72946 B
Lutz, D.; Genzel, R.; Sturm, E. +97 more
Tension remains between the observed and modeled properties of substellar objects, but objects in binary orbits, with known dynamical masses, can provide a way forward. HD 72946 B is a recently imaged brown dwarf companion to a nearby, solar-type star. We achieve ~100 µas relative astrometry of HD 72946 B in the K band using VLTI/GRAVITY, un…
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…
Joint Modelling of Dust Scattering and Thermal Emission: The Spider Complex
van Dokkum, Pieter; Abraham, Roberto; Merritt, Allison +4 more
Observations across the electromagnetic spectrum of radiative processes involving interstellar dust-emission, absorption, and scattering-are used to constrain the parameters of dust models and more directly to aid in foreground removal of dust for extragalactic and cosmological observations. Dust models can benefit from more independent constraint…
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 …
On the Hunt for the Origins of the Orphan-Chenab Stream: Detailed Element Abundances with APOGEE and Gaia
Laporte, Chervin F. P.; Price-Whelan, Adrian M.; Erkal, Denis +8 more
Stellar streams in the Galactic halo are useful probes of the assembly of galaxies like the Milky Way. Many tidal stellar streams that have been found in recent years are accompanied by a known progenitor globular cluster or dwarf galaxy. However, the Orphan-Chenab (OC) stream is one case where a relatively narrow stream of stars has been found wi…
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…
The role of cooling induced by mixing in the mass and energy cycles of the solar atmosphere
Hillier, Andrew; Snow, Ben; Arregui, Iñigo
In many astrophysical systems, mixing between cool and hot temperature gas/plasma through Kelvin-Helmholtz-instability-driven turbulence leads to the formation of an intermediate temperature phase with increased radiative losses that drive efficient cooling. The solar atmosphere is a potential site for this process to occur with interaction betwee…
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…