Search Publications
Multiline study of the radial extent of SiO, CS, and SiS in asymptotic giant branch envelopes
Cernicharo, J.; Fonfría, J. P.; Agúndez, M. +3 more
Circumstellar envelopes around asymptotic giant branch (AGB) stars contain a rich diversity of molecules, whose spatial distribution is regulated by different chemical and physical processes. In the outer circumstellar layers, all molecules are efficiently destroyed due to interactions with interstellar ultraviolet photons. Here we aim to carry ou…
A low cosmic-ray ionisation rate in the pre-stellar core Ophiuchus/H-MM1. Mapping of the molecular ions ortho-H2D+, N2H+, and DCO+
Belloche, A.; Vastel, C.; Wyrowski, F. +5 more
Aims: We test the use of three common molecular ions, ortho-H2D+ (oH2D+), N2H+, and DCO+, as probes of the internal structure and kinematics of a dense, starless molecular cloud core.
Methods: The pre-stellar core H-MM1 in Ophiuchus was mapped in the oH2
Millisecond pulsars phenomenology under the light of graph theory
de Martino, D.; Torres, D. F.; Papitto, A. +4 more
We compute and apply the minimum spanning tree (MST) of the binary millisecond pulsar population, and discuss aspects of the known phenomenology of these systems in this context. We find that the MST effectively separates different classes of spider pulsars – eclipsing radio pulsars in tight binary systems with a companion of either ~0.1–0.8 M
Compact ellipticals in the Antlia cluster of galaxies
Richtler, Tom; Caso, Juan Pablo; Bassino, Lilia P. +3 more
Context. Compact ellipticals (cEs) are rare objects in the local Universe, but relevant for the evolution of galaxies. Their origin is not completely understood, with evidence equally suggesting that they are relics of early epochs, and remnants of tidal disruptions. Aims. This article aims to characterise two cEs, members of the nearby Antlia clu…
ASASSN-21js: A multi-year transit of a ringed disc
van Boekel, R.; Kenworthy, M. A.; Pramono, T. H.
Aims: The early-type star ASASSN-21js started to fade in 2021, as was detected by the All Sky Automated Survey for Supernovae, undergoing a multi-year eclipse that is still underway. We interpret this event as being due to a structured disc of material transiting in front of the star. The disc is in orbit around a substellar object with the m…
Radio–FIR correlation: A probe into cosmic ray propagation in the nearby galaxy IC 342
Dettmar, R. -J.; Beck, R.; Tabatabaei, F. S. +6 more
Resolved studies of the correlation between the radio and far-infrared (FIR) emission from galaxies at different frequencies can unveil the interplay between star formation and the relativistic interstellar medium (ISM). Thanks to the LOFAR LoTSS observations combined with VLA, Herschel, and WISE data, we study the role of cosmic rays and magnetic…
K2-399 b is not a planet: The Saturn that wandered through the Neptune desert is actually a hierarchical eclipsing binary
Kuzuhara, M.; Fridlund, M.; Montesinos, B. +19 more
Context. The transit technique has been very efficient over the past decades in detecting planet-candidate signals. The so-called statistical validation approach has become a popular way of verifying a candidate's planetary nature. However, the incomplete consideration of false-positive scenarios and data quality can lead to misinterpretation of t…
Quantitative spectroscopy of multiple OB stars: I. The quadruple system HD 37061 at the centre of Messier 43
Przybilla, N.; Aschenbrenner, P.
Context. The majority of massive stars are located in binary or multiple star systems. Compared to single stars, these objects pose additional challenges to quantitative analyses based on model atmospheres. In particular, little information is currently available on the chemical composition of such systems. Aims. The members of the quadruple star …
ALMA reveals a dust-obscured galaxy merger at cosmic noon
Ginolfi, M.; Valentino, F.; Popping, G. +3 more
Context. Galaxy mergers play a critical role in galaxy evolution. They alter the size, morphology, dynamics, and composition of galaxies. Galaxy mergers have so far mostly been identified through visual inspection of their rest-frame optical and near-IR (NIR) emission. Dust can obscure this emission, however, resulting in the misclassification of …
Filament eruption by multiple reconnections
Liu, Y.; Chen, Y.; Schmieder, B. +5 more
Context. Filament eruption is a common phenomenon in solar activity, but the triggering mechanism is not well understood.
Aims: We focus our study on a filament eruption located in a complex nest of three active regions close to a coronal hole.
Methods: The filament eruption is observed at multiple wavelengths: by the Global Oscillation …