Search Publications
TESS discovery of two super-Earths orbiting the M-dwarf stars TOI-6002 and TOI-5713 near the radius valley
Narita, N.; Palle, E.; Kaltenegger, L. +45 more
We present the validation of two TESS super-Earth candidates transiting the mid-M dwarfs TOI-6002 and TOI-5713 every 10.90 and 10.44 days, respectively. The first star (TOI-6002) is located 32.038 ± 0.019 pc away, with a radius of 0.2409‑0.0065+0.0066 R⊙, a mass of 0.2105‑0.0048+0.0049 M⊙…
Electron moments derived from the Mercury Electron Analyzer during the cruise phase of BepiColombo
André, N.; Fedorov, A.; Sauvaud, J. -A. +20 more
Aims: We derive electron density and temperature from observations obtained by the Mercury Electron Analyzer on board Mio during the cruise phase of BepiColombo while the spacecraft is in a stacked configuration.
Methods: In order to remove the secondary electron emission contribution, we first fit the core electron population of the sol…
Very long baseline interferometry detection of nearby (<100 pc) young stars. Pilot observations
Loinard, Laurent; Launhardt, Ralf; Dzib, Sergio A. +1 more
To increase the number of sources with very long baseline interferometry (VLBI) astrometry available for comparison with the Gaia results, we have observed 31 young stars with recently reported radio emission. These stars are all in the Gaia DR3 catalog and were suggested, on the basis of conventional interferometry observations, to be nonthermal …
Processing of hydrocarbon dust in star-forming galaxies revealed with AKARI
Oyabu, Shinki; Kaneda, Hidehiro; Murata, Katsuhiro L. +5 more
Hydrocarbon dust is one of the dominant components of interstellar dust, which mainly consists of polycyclic aromatic hydrocarbons and aliphatic hydrocarbons. While hydrocarbon dust is thought to be processed in interstellar radiation fields or shocks, detailed processing mechanisms are not completely understood yet. We investigate the processing …
Two black widow pulsars in the optical and X-rays
Zharikov, S. V.; Karpova, A. V.; Shibanov, Yu. A. +5 more
Context. Two millisecond pulsars, PSR J1513‑2550 and PSR J2017‑1614, with spin periods of about 2.1 and 2.3 ms were recently discovered in the radio and γ-rays and classified as black widow pulsars in tight binary stellar systems with orbital periods of about 4.3 and 2.3 h. Aims. Our goals are to reveal the fundamental parameters of both systems a…
Plasma Observations in the Distant Magnetotail During Intervals of Northward IMF
Milan, S. E.; Mooney, M. K.; Bower, G. E.
We examine a 6-day traversal of the magnetotail by the ARTEMIS satellites during an interval of prolonged northward IMF. The electrostatic analyzer (ESA) onboard the ARTEMIS spacecraft measures high ion and electron fluxes at approximately 60 RE downtail in regions of the magnetotail which would normally be the magnetotail lobe, contain…
Modeling the interstellar dust detections by DESTINY+
Kimura, Hiroshi; Trieloff, Mario; Krüger, Harald +11 more
The DESTINY
A radical transition in the post-main-sequence system U Equulei
Menten, Karl M.; Szczerba, Ryszard; Iłkiewicz, Krystian +6 more
Context. U Equ is an unusual maser-hosting infrared source discovered in the 1990s. It was tentatively classified as a post-asymptotic giant branch (post-AGB) star with a unique optical spectrum displaying rare emission and absorption features from molecular gas at a temperature of about 500 K. In 2022, we serendipitously discovered that its optic…
A path towards constraining the evolution of the interstellar medium and outflows in the Milky Way using APOGEE
Ting, Yuan-Sen; Frankel, Neige; Sharda, Piyush
In recent years, the study of the Milky Way has significantly advanced due to extensive spectroscopic surveys of its stars, complemented by astroseismic and astrometric data. However, it remains disjoint from recent advancements in understanding the physics of the Galactic interstellar medium (ISM). This paper introduces a new model for the chemic…
Self-consistent modelling of the Milky Way structure using live potentials
Klessen, Ralf S.; Sormani, Mattia C.; Smith, Rowan J. +6 more
To advance our understanding of the evolution of the interstellar medium (ISM) of our Galaxy, numerical models of Milky Way (MW) type galaxies are widely used. However, most models only vaguely resemble the MW (e.g. in total mass), and often use imposed analytic potentials (which cannot evolve dynamically). This poses a problem in asserting their …