Search Publications
Simulating the infrared sky with a SPRITZ
Pozzi, F.; Rodighiero, G.; Feltre, A. +6 more
Aims: Current hydrodynamical and semi-empirical simulations of galaxy formation and evolution have difficulties in reproducing the number densities of infrared-detected galaxies. Therefore, a phenomenological simulation tool that is new and versatile is necessary to reproduce current and predict future observations at infrared (IR) wavelength…
Analysis of apsidal motion in eclipsing binaries using TESS data. I. A test of gravitational theories
Ribas, I.; Anglada-Escudé, G.; Morales, J. C. +3 more
Context. The change in the argument of periastron of eclipsing binaries, that is, the apsidal motion caused by classical and relativistic effects, can be measured from variations in the difference between the time of minimum light of the primary and secondary eclipses. Poor apsidal motion rate determinations and large uncertainties in the classica…
A KMOS survey of the nuclear disk of the Milky Way. I. Survey design and metallicities
Schultheis, M.; Prieto, M. A.; Fritz, T. K. +7 more
Context. In the central few degrees of the bulge of the Milky Way there is a flattened structure of gas, dust, and stars, known as the central molecular zone, that is similar to nuclear disks in other galaxies. As a result of extreme foreground extinction, we possess only sparse information about the (mostly old) stellar population of the nuclear …
The dipper population of Taurus seen with K2
Cody, Ann Marie; Rebull, Luisa M.; Roggero, Noemi +1 more
Context. Dippers are typically low-mass, pre-main-sequence stars that display dips in their light curves. These dips have been attributed to dusty warps that form in the inner part of the disk.
Aims: Our goal is to derive the characteristics of dipper stars in Taurus to assess the physical mechanisms that induce dipper light curves.
Meth…
Weighing the Galactic disk using phase-space spirals. I. Tests on one-dimensional simulations
de Salas, P. F.; Widmark, A.; Laporte, C.
We present a new method for inferring the gravitational potential of the Galactic disk, using the time-varying structure of a phase-space spiral in the (z, w)-plane (where z and w represent vertical position and vertical velocity). Our method of inference extracts information from the shape of the spiral and disregards the bulk density distributio…
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…