Search Publications
Modeling the nonaxisymmetric structure in the HD 163296 disk with planet-disk interaction
Dullemond, C. P.; Kley, W.; Weber, P. +2 more
Context. High-resolution ALMA observations such as the DSHARP campaign have revealed a variety of rich substructures in numerous protoplanetary disks. These structures consist of rings, gaps, and asymmetric features. It has been debated whether planets can be accounted for among these substructures in the dust continuum. Characterizing the origin …
Cosmology with the submillimetre galaxies magnification bias. Tomographic analysis
Bonavera, L.; González-Nuevo, J.; Migliaccio, M. +5 more
Context. High-z submillimetre galaxies can be used as a background sample for gravitational lensing studies thanks to their magnification bias. In particular, the magnification bias can be exploited in order to constrain the free parameters of a halo occupation distribution (HOD) model and some of the main cosmological parameters. A pseudo-tomogra…
EC 22536−5304: a lead-rich and metal-poor long-period binary
Heber, U.; Irrgang, A.; Dorsch, M. +2 more
Helium-burning hot subdwarf stars of spectral types O and B (sdO/B) are thought to be produced through various types of binary interactions. The helium-rich hot subdwarf star EC 22536−5304 was recently found to be extremely enriched in lead. Here, we show that EC 22536−5304 is a binary star with a metal-poor subdwarf F-type (sdF) companion. We per…
Evidence for chromium hydride in the atmosphere of hot Jupiter WASP-31b
Chubb, Katy L.; Braam, Marrick; van der Tak, Floris F. S. +1 more
Context. The characterisation of exoplanet atmospheres has shown a wide diversity of compositions. Hot Jupiters have the appropriate temperatures to host metallic compounds, which should be detectable through transmission spectroscopy.
Aims: We aim to detect exotic species in the transmission spectra of hot Jupiters, specifically WASP-31b, by…
PENELLOPE. II. CVSO 104: A pre-main sequence close binary with an optical companion in Ori OB1
Ábrahám, P.; Kóspál, Á.; Siwak, M. +14 more
We present the results of our study of the close pre-main sequence spectroscopic binary CVSO 104 in Ori OB1, based on data obtained within the PENELLOPE legacy program. We derive, for the first time, the orbital elements of the system and the stellar parameters of the two components. The system is composed of two early M-type stars and has an orbi…
Weak-lensing mass reconstruction using sparsity and a Gaussian random field
Starck, J. -L.; Peel, A.; Jeffrey, N. +2 more
Aims: We introduce a novel approach to reconstructing dark matter mass maps from weak gravitational lensing measurements. The cornerstone of the proposed method lies in a new modelling of the matter density field in the Universe as a mixture of two components: (1) a sparsity-based component that captures the non-Gaussian structure of the fiel…
The long period of 3He-rich solar energetic particles measured by Solar Orbiter 2020 November 17-23
Lario, D.; Maksimovic, M.; Vecchio, A. +31 more
We report observations of a relatively long period of 3He-rich solar energetic particles (SEPs) measured by Solar Orbiter. The period consists of several well-resolved ion injections. The high-resolution STEREO-A imaging observations reveal that the injections coincide with extreme ultraviolet jets and brightenings near the east limb, n…
NGTS-14Ab: a Neptune-sized transiting planet in the desert
Bouchy, F.; Erikson, A.; Rauer, H. +35 more
Context. The sub-Jovian, or Neptunian, desert is a previously identified region of parameter space where there is a relative dearth of intermediate-mass planets with short orbital periods.
Aims: We present the discovery of a new transiting planetary system within the Neptunian desert, NGTS-14.
Methods: Transits of NGTS-14Ab were discover…
First observations and performance of the RPW instrument on board the Solar Orbiter mission
Müller, D.; Hellinger, P.; André, M. +107 more
The Radio and Plasma Waves (RPW) instrument on the ESA Solar Orbiter mission is designed to measure in situ magnetic and electric fields and waves from the continuum up to several hundred kHz. The RPW also observes solar and heliospheric radio emissions up to 16 MHz. It was switched on and its antennae were successfully deployed two days after the…
Discovery of new globular clusters in the Sagittarius dwarf galaxy
Minniti, D.; Rejkuba, M.; Ripepi, V. +14 more
Context. Globular clusters (GCs) are witnesses of the past accretion events onto the Milky Way. In particular, the GCs of the Sagittarius (Sgr) dwarf galaxy are important probes of an on-going merger.
Aims: Our main goal is to search for new GC members of this dwarf galaxy using the VISTA Variables in the Via Lactea Extended Survey (VVVX) nea…