Search Publications
Multiwavelength observations of PSR J2021+4026 across a mode change reveal a phase shift in its X-ray emission
Harding, A. K.; Kerr, M.; Marelli, M. +6 more
Context. We have investigated the multiwavelength emission of PSR J2021+4026, the only isolated γ-ray pulsar known to be variable, which in October 2011 underwent a simultaneous change in γ-ray flux and spin-down rate, followed by a second mode change in February 2018. Multiwavelength monitoring is crucial to understand the physics behind these ev…
An imaged 15 MJup companion within a hierarchical quadruple system
Henning, T.; Janson, M.; Langlois, M. +20 more
Context. Since 2019, the direct imaging B-star Exoplanet Abundance STudy (BEAST) at SPHERE@VLT has been scanning the surroundings of young B-type stars in order to ascertain the ultimate frontiers of giant planet formation. Recently, the 17−4+3 Myr HIP 81208 was found to host a close-in (∼50 au) brown dwarf and a wider (∼230 …
Near-infrared evolution of the equatorial ring of SN 1987A
Larsson, J.; Lundqvist, P.; Fransson, C. +4 more
We used adaptive optics imaging and integral field spectroscopy from the Very Large Telescope, together with images from the Hubble Space Telescope, to study the near-infrared (NIR) evolution of the equatorial ring (ER) of SN 1987A. We studied the NIR flux and morphology over time in order to lay the groundwork for James Webb Space Telescope obser…
CO enhancement by magnetohydrodynamic waves. Striations in the Polaris Flare
Panopoulou, G. V.; Goldsmith, P. F.; Pelgrims, V. +4 more
Context. The formation of molecular gas in interstellar clouds is a slow process, but can be enhanced by gas compression. Magneto-hydrodynamic (MHD) waves can create compressed quasi-periodic linear structures, referred to as striations. Striations are observed at the column densities at which the transition from atomic to molecular gas takes plac…
CHEX-MATE: Pressure profiles of six galaxy clusters as seen by SPT and Planck
Pointecouteau, E.; Pratt, G. W.; Rossetti, M. +11 more
Context. Pressure profiles are sensitive probes of the thermodynamic conditions and the internal structure of galaxy clusters. The intra-cluster gas resides in hydrostatic equilibrium within the dark-matter gravitational potential. However, this equilibrium may be perturbed; for example, as a consequence of thermal energy losses, feedback, and non…
A comparison of the Milky Way's recent star formation revealed by dust thermal emission and high-mass stars
Klessen, R. S.; Elia, D.; Schisano, E. +10 more
We present a comparison of the Milky Way's star formation rate (SFR) surface density (∑SFR) obtained with two independent state-of-the-art observational methods. The first method infers ΣSFR from observations of the dust thermal emission from interstellar dust grains in far-infrared wavelengths registered in the Herschel infr…
The cosmic waltz of Coma Berenices and Latyshev 2 (Group X). Membership, phase-space structure, mass, and energy distributions
Béjar, V. J. S.; Martín, E. L.; Lodieu, N. +3 more
Context. Open clusters (OCs) are fundamental benchmarks where theories of star formation and stellar evolution can be tested and validated. Coma Berenices (Coma Ber) and Latyshev 2 (Group X) are the second and third OCs closest to the Sun, making them excellent targets to search for low-mass stars and ultra-cool dwarfs. In addition, this pair will…
Stereoscopic disambiguation of vector magnetograms: First applications to SO/PHI-HRT data
Woch, J.; Solanki, S. K.; Parenti, S. +34 more
Contact. Spectropolarimetric reconstructions of the photospheric vector magnetic field are intrinsically limited by the 180° ambiguity in the orientation of the transverse component. So far, the removal of such an ambiguity has required assumptions about the properties of the photospheric field, which makes disambiguation methods model-dependent. …
The MUSE-Faint survey. IV. Dissecting Leo T, a gas-rich relic with recent star formation
Boogaard, Leindert A.; Brinchmann, Jarle; Weilbacher, Peter M. +6 more
Context. Leo T (MV = −8.0) is a peculiar dwarf galaxy that stands out for being both the faintest and the least massive galaxy known to contain neutral gas and to display signs of recent star formation. It is also extremely dark-matter dominated. As a result, Leo T presents an invaluable opportunity to study the processes of gas and sta…
TESS discovery of a super-Earth orbiting the M-dwarf star TOI-1680
Queloz, D.; Narita, N.; Winn, J. N. +52 more
We report the discovery by the TESS mission of a super-Earth on a 4.8-days orbit around an inactive M4.5 dwarf (TOI-1680), validated by ground-based facilities. The host star is located 37.14 pc away, with a radius of 0.2100 ± 0.0064 R⊙, mass of 0.1800 ± 0.0044 M⊙, and an effective temperature of 3211 ±100 K. We validated and…