Search Publications
The SOFIA FEEDBACK [CII] Legacy Survey: Rapid molecular cloud dispersal in RCW 79
Schneider, N.; Zavagno, A.; Tielens, A. G. G. M. +12 more
It has long been discussed whether stellar feedback in the form of winds and/or radiation can shred the nascent molecular cloud, thereby controlling the star formation rate. However, directly probing and quantifying the impact of stellar feedback on the neutral gas of the nascent clouds is challenging. We present an investigation of this impact to…
Recurrent solar density transients in the slow wind observed with the Metis coronagraph
Heinzel, P.; Sasso, C.; Romoli, M. +22 more
Aims We aim to investigate and characterize the morphology and dynamics of small-scale coronal plasma density inhomogeneities detected as brighter, denser features propagating outward through the solar corona in the visible-light images of the Metis coronagraph on board Solar Orbiter on February 22, 2021. Our main focus is on investigating their p…
Asteroseismic age estimate of the open cluster NGC 6866 using Kepler and Gaia
Grundahl, F.; Tailo, M.; Stello, D. +10 more
Context. Asteroseismic investigations of solar-like oscillations in giant stars allow for the derivation of their masses and radii. For members of open clusters, this allows us to obtain an age estimate of the cluster that is expected to be identical to the age estimate given by the colour-magnitude diagram, but independent of the uncertainties th…
A high-resolution study of near-IR diffuse interstellar bands, search for small-scale structure, time variability, and stellar features
Smoker, J. V.; Evans, C. J.; Boffin, H. M. J. +13 more
Context. The diffuse interstellar bands (DIBs) are a set of hundreds of unidentified absorption features that appear almost ubiquitously throughout the interstellar medium. Most DIBs appear at optical wavelengths, but some are in the near-infrared.
Aims: We aim to characterise near-infrared DIBs at high spectral resolving power towards multip…
Recurrent 3He-rich solar energetic particle injections observed by Solar Orbiter at ∼0.5 au
Rodriguez, L.; Rodríguez-Pacheco, J.; Wimmer-Schweingruber, R. F. +8 more
We report Solar Orbiter observations of six recurrent solar energetic particle injections in 2022 March 3−6 at ∼0.5 au. All but one were associated with jets emanating from a plage near a large sunspot in active region 12 957. We saw large jets in injections with high 3He and Fe enrichments and minor jets in injections with no or lower …
A dynamical mass for GJ 463 b: A massive super-Jupiter companion beyond the snow line of a nearby M dwarf
Sozzetti, A.
We determined the full orbital architecture and true mass of the recently Doppler-detected long-period giant planet GJ 463 b using the HIPPARCOS-Gaia proper motion anomaly in combination with the available radial velocities, constraints from the knowledge of the spectroscopic orbital parameters, and supplementary information from a sensitivity ana…
Constraints on the multiplicity of the most massive stars known: R136 a1, a2, a3, and c
Crowther, P. A.; Bostroem, K. A.; Sander, A. A. C. +5 more
Context. The upper stellar mass limit is a fundamental parameter for simulations of star formation, galactic chemical evolution, and stellar feedback. An empirical bound on this parameter is therefore highly valuable. The most massive stars known to date are R 136 a1, a2, a3, and c, with reported masses in excess of 150-200 M⊙ and initi…
Clustering of magnetic reconnection exhausts in the solar wind: An automated detection study
Rouillard, Alexis P.; Phan, Tai D.; Louarn, Philippe +9 more
Context. Magnetic reconnection is a fundamental process in astrophysical plasmas that enables the dissipation of magnetic energy at kinetic scales. Detecting this process in situ is therefore key to furthering our understanding of energy conversion in space plasmas. However, reconnection jets typically scale from seconds to minutes in situ, and as…
Apocenter pileup and arcs: A narrow dust ring around HD 129590
Bayo, A.; Henning, Th.; Milli, J. +6 more
Context. Observations of debris disks have significantly improved over the past decades, both in terms of sensitivity and spatial resolution. At near-infrared wavelengths, new observing strategies and post-processing algorithms allow us to drastically improve the final images and reveal faint structures in the disks. These structures inform us abo…
BEAST detection of a brown dwarf and a low-mass stellar companion around the young bright B star HIP 81208
Henning, Thomas; Reffert, Sabine; Viswanath, Gayathri +15 more
Recent observations by the B-star Exoplanet Abundance Study (BEAST) illustrate the existence of substellar companions around very massive stars. Here, we present the detection of two lower mass companions to a relatively nearby (148.7−1.3+1.5 pc), young (17−4+3 Myr), bright (V = 6.632 ± 0.006 mag), 2.58 …