Search Publications
TOI-1442 b and TOI-2445 b: Two potentially rocky ultra-short period planets around M dwarfs
Tamura, M.; Pallé, E.; Hirano, T. +52 more
Context. Exoplanets with orbital periods of less than one day are known as ultra-short period (USP) planets. They are relatively rare products of planetary formation and evolution processes, but especially favourable for characterisation with current planet detection methods. At the time of writing, 125 USP planets have already been confirmed.
Unusually long path length for a nearly scatter-free solar particle event observed by Solar Orbiter at 0.43 au
Kouloumvakos, Athanasios; Xu, Zigong; Wimmer-Schweingruber, Robert F. +28 more
Context. After their acceleration and release at the Sun, solar energetic particles (SEPs) are injected into the interplanetary medium and are bound to the interplanetary magnetic field (IMF) by the Lorentz force. The expansion of the IMF close to the Sun focuses the particle pitch-angle distribution, and scattering counteracts this focusing. Sola…
A z = 1.85 galaxy group in CEERS: Evolved, dustless, massive intra-halo light and a brightest group galaxy in the making
Papovich, Casey; Finkelstein, Steven L.; Pérez-González, Pablo G. +25 more
We present CEERS JWST/NIRCam imaging of a massive galaxy group at z = 1.85, to explore the early JWST view on massive group formation in the distant Universe. The group contains ≳16 members (including six spectroscopic confirmations) down to log10(M⋆/M⊙) = 8.5, including the brightest group galaxy (BGG) in the proc…
Astrochemical models of interstellar ices: History matters
Gratier, P.; Dartois, E.; Noble, J. A. +6 more
Context. Ice is ubiquitous in the interstellar medium. As soon as it becomes slightly opaque in the visible, it can be seen for visual extinctions (AV) above ~1.5. The James Webb Space Telescope (JWST) will observe the ice composition toward hundreds of lines of sight, covering a broad range of physical conditions in these extinct regio…
Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): Diverse outcomes of binary-disk interactions
Zhang, Yapeng; Bae, Jaehan; Huang, Jane +15 more
Context. Circumstellar disks play an essential role in the outcomes of planet formation. Disks do not evolve in isolation, as about half of solar-type stars were born in binary or multiple systems. The presence of stellar companions modifies the morphology and evolution of disks, potentially resulting in a different planet population. Resolving di…
Exploring the brown dwarf desert with precision radial velocities and Gaia DR3 astrometric orbits
Holl, B.; Sahlmann, J.; Ségransan, D. +4 more
Context. The observed scarcity of brown dwarfs in close orbits (within 10 au) around solar-type stars has posed significant questions about the origins of these substellar companions. These questions not only pertain to brown dwarfs but also impact our broader understanding of planetary formation processes. However, to resolve these formation mech…
Ca triplet metallicities and velocities for 12 globular clusters toward the galactic bulge
Minniti, D.; Saviane, I.; Geisler, D. +6 more
Context. Globular clusters (GCs) are excellent tracers of the formation and early evolution of the Milky Way. The bulge GCs (BGCs) are particularly important because they can reveal vital information about the oldest in situ component of the Milky Way.
Aims: Our aim is to derive the mean metallicities and radial velocities for 13 GCs that lie…
Magnetic fields inferred by Solar Orbiter: A comparison between SO/PHI-HRT and SDO/HMI
Woch, J.; Solanki, S. K.; Schou, J. +31 more
Context. The High Resolution Telescope (HRT) of the Polarimetric and Helioseismic Imager on board the Solar Orbiter spacecraft (SO/PHI) and the Helioseismic and Magnetic Imager (HMI) on board the Solar Dynamics Observatory (SDO) both infer the photospheric magnetic field from polarised light images. SO/PHI is the first magnetograph to move out of …
A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE). XV. The Hα luminosity function of the Virgo cluster
Ferrarese, L.; Boquien, M.; Balogh, M. +17 more
We use a complete set of deep narrow-band imaging data for 384 galaxies gathered during the Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE) to derive the first Hα luminosity function of the Virgo cluster within its virial radius. The data, which are sensitive to the emission of a single O-early B ionising star, allow us to cover …
The cosmic DANCe of Perseus. I. Membership, phase-space structure, mass, and energy distributions
Miret-Roig, N.; Bouy, H.; Sarro, L. M. +4 more
Context. Star-forming regions are excellent benchmarks for testing and validating theories of star formation and stellar evolution. The Perseus star-forming region, being one of the youngest (< 10 Myr), closest (280−320 pc), and most studied in the literature, is a fundamental benchmark.
Aims: We aim to study the membership, phase-space st…