Search Publications
Study of two interacting interplanetary coronal mass ejections encountered by Solar Orbiter during its first perihelion passage. Observations and modeling
Müller, D.; Perri, S.; Romoli, M. +46 more
Context. Solar Orbiter, the new-generation mission dedicated to solar and heliospheric exploration, was successfully launched on February 10, 2020, 04:03 UTC from Cape Canaveral. During its first perihelion passage in June 2020, two successive interplanetary coronal mass ejections (ICMEs), propagating along the heliospheric current sheet (HCS), im…
Catalogue of exoplanets accessible in reflected starlight to the Nancy Grace Roman Space Telescope. Population study and prospects for phase-curve measurements
Rauer, H.; Csizmadia, Sz.; Cabrera, J. +3 more
Context. Reflected starlight measurements will open a new path in the characterization of directly imaged exoplanets. However, we still lack a population study of known targets to which this technique can be applied.
Aims: We investigate which of the about 4300 exoplanets confirmed to date are accessible for the Roman Space Telescope coronagr…
Linking nearby stellar streams to more distant halo overdensities
Helmi, A.; Balbinot, E.
Context. It has recently been shown that the halo near the Sun contains several kinematic substructures associated with past accretion events. For the more distant halo, there is evidence of large-scale density variations - in the form of stellar clouds or overdensities.
Aims: We study the link between the local halo kinematic groups and thre…
Distances to molecular clouds in the second Galactic quadrant
Wang, Hongchi; Xu, Ye; Su, Yang +5 more
We present distances to 76 medium-sized molecular clouds and an extra large-scale molecular cloud in the second Galactic quadrant (104. °75 < l < 150. °25 and |b| < 5. °25), 73 of which are accurately measured for the first time. Molecular cloud samples are drawn from l-b-V space (- 95 < VLSR < 25 km s-1) with …
Solar wind Alfvénicity during solar cycle 23 and 24. Perspective for future observations with Parker Solar Probe and Solar Orbiter
Bruno, R.; Lepri, S. T.; Zhao, L. +5 more
Context. Alfvénic fluctuations are ubiquitous features observed in solar wind, especially in the inner heliosphere. However, strong Alfvénic fluctuations are recovered in the near-Earth solar wind too, mainly in fast streams, but also in some cases in slow wind intervals, as highlighted in recent studies.
Aims: The present study focuses on a …
ALMA and MUSE observations reveal a quiescent multi-phase circumgalactic medium around the z ≃ 3.6 radio galaxy 4C 19.71
Lehnert, Matthew D.; De Breuck, Carlos; Vernet, Joël +2 more
We present MUSE at VLT imaging spectroscopy of rest-frame ultraviolet emission lines and ALMA observations of the [C I] 3P1-3P0 emission line, probing both the ionized and diffuse molecular medium around the radio galaxy 4C 19.71 at z ≃ 3.6. This radio galaxy has extended Lyα emission over a region ∼100 …
The first interferometric survey of massive YSOs in the K-band. Hot dust, ionised gas, and binarity at au scales
Mendigutía, I.; Stecklum, B.; de Wit, W. -J. +8 more
Context. Circumstellar discs are essential for the formation of high mass stars, while multiplicity, and in particular binarity, appears to be an inevitable outcome, as the vast majority of massive stars (>8 M⊙) are found in binaries (up to 100%). Our understanding of the innermost regions of accretion discs around massive stars and …
Timing argument take on the Milky Way and Andromeda past encounter
Benisty, David
The two-body problem of the M 31 and Milky Way (MW) galaxies with a cosmological constant background is studied, with an emphasis on the possibility that they experienced a past encounter (PE). Past encounters are possible only for a nonzero transverse velocity, and their viability is subject to observations of the imprints of such near collisions…
A SOPHIE RV search for giant planets around young nearby stars (YNS). A combination with the HARPS YNS survey
Meunier, N.; Messina, S.; Lagrange, A. -M. +9 more
Context. The search of close (a ≲ 5 au) giant planet (GP) companions with radial velocity (RV) around young stars and the estimate of their occurrence rates is important to constrain the migration timescales. Furthermore, this search will allow the giant planet occurrence rates to be computed at all separations via the combination with direct imag…
ATOMIUM: halide molecules around the S-type AGB star W Aquilae
Waters, L. B. F. M.; Menten, K. M.; Sahai, R. +36 more
Context. S-type asymptotic giant branch (AGB) stars are thought to be intermediates in the evolution of oxygen- to carbon-rich AGB stars. The chemical compositions of their circumstellar envelopes are also intermediate but have not been studied in as much detail as their carbon- and oxygen-rich counterparts. W Aql is a nearby S-type star, with wel…