Search Publications
Gaia Early Data Release 3
Kotak, Rubina; Forveille, Thierry
Pulsational instability of pre-main-sequence models from accreting protostars. I. Constraining the input physics for accretion with spectroscopic parameters and stellar pulsations
Zwintz, K.; Barnes, T. G.; Steindl, T. +2 more
Context. The picture of pre-main-sequence evolution is often simplified by the application of classical initial models. Such models have large initial radii and sufficient uniform contraction to make them fully convective, however, real stars are born as small protostellar seeds in collapsing molecular clouds and obtain their final mass by means o…
Strong dependence of the physical properties of cores on spatial resolution in observations and simulations
Men'shchikov, A.; Didelon, P.; Motte, F. +3 more
The angular resolution of a telescope is the primary observational parameter, along with the detector sensitivity in defining the quality of the observed images and of the subsequent scientific exploitation of the data. During the last decade in star formation research, many studies have targeted low- and high-mass star formation regions located a…
Simulations of radio-wave anisotropic scattering to interpret type III radio burst data from Solar Orbiter, Parker Solar Probe, STEREO, and Wind
Maksimovic, M.; Bale, S. D.; Bonnin, X. +9 more
Aims: We use multi-spacecraft observations of individual type III radio bursts to calculate the directivity of the radio emission. We compare these data to the results of ray-tracing simulations of the radio-wave propagation and probe the plasma properties of the inner heliosphere.
Methods: We used ray-tracing simulations of radio-wave p…
Suprathermal particles from corotating interaction regions during the first perihelion pass of Solar Orbiter
Kulkarni, S. R.; Rodríguez-Pacheco, J.; Wimmer-Schweingruber, R. F. +24 more
The first orbit of Solar Orbiter provided comprehensive measurements of six corotating interaction regions (CIRs) within 1 au. Five of these CIRs were also observed by ACE at 1 au, allowing for comparisons of the suprathermal ion intensities and spectra at different radial distances. Only subtle modulations of the 4He spectral slopes ar…
Spectroscopic evolution of massive stars near the main sequence at low metallicity
Martins, F.; Palacios, A.
Context. The evolution of massive stars is not fully understood. Several physical processes affect their life and death, with major consequences on the progenitors of core-collapse supernovae, long-soft gamma-ray bursts, and compact-object mergers leading to gravitational wave emission.
Aims: In this context, our aim is to make the prediction…
The effect of active galactic nuclei on the cold interstellar medium in distant star-forming galaxies
Daddi, E.; Gómez-Guijarro, C.; Magdis, G. E. +17 more
In the framework of a systematic study with the ALMA interferometer of IR-selected main-sequence and starburst galaxies at z ∼ 1 − 1.7 at typical ∼1″ resolution, we report on the effects of mid-IR- and X-ray-detected active galactic nuclei (AGN) on the reservoirs and excitation of molecular gas in a sample of 55 objects. We find widespread detecta…
Probing the structure of a massive filament: ArTéMiS 350 and 450 µm mapping of the integral-shaped filament in Orion A
Rodriguez, L.; Roussel, H.; André, Ph. +18 more
Context. The Orion molecular cloud is the closest region of high-mass star formation. It is an ideal target for investigating the detailed structure of massive star-forming filaments at high resolution and the relevance of the filament paradigm for the earliest stages of intermediate- to high-mass star formation.
Aims: Within the Orion A mole…
Whistler instability driven by the sunward electron deficit in the solar wind. High-cadence Solar Orbiter observations
Lewis, G. R.; Kataria, D. O.; Livi, S. +19 more
Context. Solar wind electrons play an important role in the energy balance of the solar wind acceleration by carrying energy into interplanetary space in the form of electron heat flux. The heat flux is stored in the complex electron velocity distribution functions (VDFs) shaped by expansion, Coulomb collisions, and field-particle interactions.
A proto-pseudobulge in ESO 320-G030 fed by a massive molecular inflow driven by a nuclear bar
Smith, Howard A.; Colina, Luis; Alonso-Herrero, Almudena +10 more
Galaxies with nuclear bars are believed to efficiently drive gas inward, generating a nuclear starburst and possibly an active galactic nucleus. We confirm this scenario for the isolated, double-barred, luminous infrared galaxy ESO 320-G030 based on an analysis of Herschel and ALMA spectroscopic observations. Herschel/PACS and SPIRE observations o…