Search Publications
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…
VST-GAME: Galaxy assembly as a function of mass and environment with VST. Photometric assessment and density field of MACSJ0416
Rodighiero, G.; Demarco, R.; Vulcani, B. +14 more
Context. Observational studies have widely demonstrated that galaxy physical properties are strongly affected by the surrounding environment. On one side, gas inflows provide galaxies with new fuel for star formation. On the other side, the high temperatures and densities of the medium are expected to induce quenching in the star formation. Observ…
Reeling in the Whirlpool galaxy: Distance to M 51 clarified through Cepheids and the type IIP supernova 2005cs
Leibundgut, B.; Anderson, R. I.; Blondin, S. +4 more
Context. The distance to the Whirlpool galaxy, M 51, is still debated, even though the galaxy has been studied in great detail. Current estimates range from 6.02 to 9.09 Mpc, and different methods yield discrepant results. No Cepheid distance has been published for M 51 to date.
Aims: We aim to estimate a more reliable distance to M 51 throug…
Surface chemical composition of single WNh stars
Martins, Fabrice
Context. Wolf-Rayet (WR) stars of the WNh category contain a significant fraction of hydrogen at their surface. They can be hydrogen-burning, very massive stars or stars in a post-main sequence phase of evolution. Also, WNh stars are sometimes not included in population synthesis models.
Aims: We aim to better characterise the properties of s…
Milky Way globular clusters on cosmological timescales. III. Interaction rates
Berczik, Peter; Ishchenko, Maryna; Omarov, Chingis +4 more
Aims: We carry out the self-consistent dynamic evolution of the orbital structure of Milky Way globular clusters. This allows us to estimate possible and probable close passages and even collisions of the clusters with each other.
Methods: We reproduced the orbits of 147 globular clusters in 10 Gyr lookback time using our own high-order …
Chrono-chemodynamical analysis of the globular cluster NGC 6355: Looking for the fundamental bricks of the Bulge
Valentini, M.; Chiappini, C.; Bica, E. +7 more
The information on Galactic assembly time is imprinted on the chemodynamics of globular clusters. This makes them important probes that help us to understand the formation and evolution of the Milky Way. Discerning between in-situ and ex-situ origin of these objects is difficult when we study the Galactic bulge, which is the most complex and mixed…