Search Publications
ALMA Lensing Cluster Survey: A spectral stacking analysis of [C II] in lensed z ∼ 6 galaxies
Richard, Johan; Fujimoto, Seiji; Kohno, Kotaro +14 more
Context. The properties of galaxies at redshift z > 6 hold the key to our understanding of the early stages of galaxy evolution and can potentially identify the sources of the ultraviolet radiation that give rise to the epoch of reionisation. The far-infrared cooling line of [C II] at 158 µm is known to be bright and correlate with the st…
Multiwavelength constraints on the unidentified Galactic TeV sources HESS J1427-608, HESS J1458-608, and new VHE γ-ray source candidates
Lemoine-Goumard, M.; Vasileiadis, G.; Renaud, M. +1 more
Aims: Among the γ-ray sources discovered at high and very-high energies, a large fraction still lack a clear identification. In particular, the H.E.S.S. Galactic Plane Survey (HGPS) revealed 78 TeV sources among which 47 are not clearly associated with a known object. Multiwavelength data can help identify the origin of the very-high energy γ…
Time evolution of gaps in stellar streams in axisymmetric Stäckel potentials
Helmi, Amina; Koppelman, Helmer H.
Context. When a subhalo interacts with a cold stellar stream, the otherwise nearly smooth distribution of stars is disturbed, and this creates a gap. The properties of these gaps depend on the interaction parameters. Their characterisation could thus lead to a determination of the mass spectrum of the perturbers and might reveal the existence of d…
The key impact of the host star's rotational history on the evolution of TOI-849b
Buldgen, G.; Eggenberger, P.; Bourrier, V. +2 more
Context. TOI-849b is one of the few planets populating the hot-Neptune desert and it is the densest Neptune-sized one discovered so far. Its extraordinary proximity to the host star, together with the absence of a massive H/He envelope on top of the 40.8 M⊕ rocky core, calls into question the role played by the host star in the evolutio…
The dense warm ionized medium in the inner Galaxy
Goldsmith, P. F.; Langer, W. D.; Buchbender, C. +6 more
Context. Ionized interstellar gas is an important component of the interstellar medium and its lifecycle. The recent evidence for a widely distributed highly ionized warm interstellar gas with a density intermediate between the warm ionized medium (WIM) and compact H II regions suggests that there is a major gap in our understanding of the interst…
Ubiquitous signs of interactions in early-type galaxies with prolate rotation
Duc, Pierre-Alain; Bílek, Michal; Ebrová, Ivana +2 more
Context. A small fraction of early-type galaxies (ETGs) show prolate rotation; that is, they rotate around their long photometric axis. In simulations, certain configurations of galaxy mergers are known to produce this type of rotation.
Aims: We investigate the association of prolate rotation and signs of galaxy interactions among the observe…
The Cosmic Large-Scale Structure in X-rays (CLASSIX) Cluster Survey. IV. Superclusters in the local Universe at z ≤ 0.03
Böhringer, Hans; Chon, Gayoung
It is important to map the large-scale matter distribution in the local Universe for cosmological studies, such as the tracing of the large-scale peculiar velocity flow, the characterisation of the environment for different astronomical objects, and for precision measurements of cosmological parameters. We used X-ray luminous clusters to map this …
Study of the thermal and nonthermal emission components in M 31: the Sardinia Radio Telescope view at 6.6 GHz
de Bernardis, P.; Masi, S.; Paladini, R. +21 more
Context. The Andromeda galaxy is the best-known large galaxy besides our own Milky Way. Several images and studies exist at all wavelengths from radio to hard X-ray. Nevertheless, only a few observations are available in the microwave range where its average radio emission reaches the minimum.
Aims: In this paper, we want to study the radio m…
K-band GRAVITY/VLTI interferometry of "extreme" Herbig Be stars. The size-luminosity relation revisited
Montesinos, B.; Mendigutía, I.; Vioque, M. +7 more
Context. It has been hypothesized that the location of Herbig Ae/Be stars (HAeBes) within the empirical relation between the inner disk radius (rin), inferred from K-band interferometry, and the stellar luminosity (L*), is related to the presence of the innermost gas, the disk-to-star accretion mechanism, the dust disk proper…
Observation and calibration strategies for large-scale multi-beam velocity-resolved mapping of the [CII] emission in the Orion molecular cloud
Teyssier, D.; Goicoechea, J. R.; Stutzki, J. +15 more
Context. The [CII] 158 µm far-infrared fine-structure line is one of the dominant cooling lines of the star-forming interstellar medium. Hence [CII] emission originates in and thus can be used to trace a range of ISM processes. Velocity-resolved large-scale mapping of [CII] in star-forming regions provides a unique perspective of the kinemat…