Search Publications
Gaia data processing. SEAPipe: The source environment analysis pipeline
Harrison, D. L.; Evans, D. W.; van Leeuwen, F. +3 more
Aims: Our goal is to describe two potential options for the Source Environment Analysis pipeline (SEAPipe) for the Gaia mission. This pipeline will enable the discovery of sources that are new to Gaia, in the sense that they were not found by the on-board detection algorithm. These additional sources (secondaries) are discoverable in the vici…
Understanding the radio emission from ϵ Eridani
Rodríguez, Luis F.; Lizano, Susana; Cantó, Jorge +1 more
Some solar-type stars are known to present faint, time-variable radio continuum emission whose nature is not clearly established. We report on Jansky Very Large Array observations of the nearby star ϵ Eridani at 10.0 and 33.0 GHz. We find that this star has flux density variations on scales down to days, hours, and minutes. On 2020 April 15 it exh…
Parametric study of the kinematic evolution of coronal mass ejection shock waves and their relation to flaring activity
Kouloumvakos, Athanasios; Rouillard, Alexis P.; Warmuth, Alexander +2 more
Context. Coronal and interplanetary shock waves produced by coronal mass ejections (CMEs) are major drivers of space-weather phenomena, inducing major changes in the heliospheric radiation environment and directly perturbing the near-Earth environment, including its magnetosphere. A better understanding of how these shock waves evolve from the cor…
Variations in the intermediate wind region of the blue supergiant 55 Cygni
Kraus, M.; Granada, A.; Arias, M. L. +6 more
Context. The quantitative near-infrared (NIR) spectroscopic synthesis is an important technique for determining wind properties of massive stars. The Brα line is an excellent mass-loss tracer and provides valuable information on the physical conditions of intermediate-wind regions. The knowledge of the wind properties gained by studying the NIR li…
2021 occultations and transits of Linus orbiting (22) Kalliope. I. Polygonal and cliptracing algorithms
Carry, B.; Jehin, E.; de Wit, J. +10 more
Aims: The satellite Linus orbiting the main-belt asteroid (22) Kalliope exhibited mutual occultation and transit events in late 2021. A photometric campaign was organised and observations were undertaken by the TRAPPIST-South, SPECULOOS-Artemis, OWL-Net, and BOAO telescopes, with the goal to further constrain dynamical and photometric models …
Disentangling the two sub-populations of early Herbig Be stars using VLT/X-shooter spectra
Arun, R.; Manoj, P.; Maheswar, G. +5 more
Context. Early Herbig Be (HBe) stars are massive, young stars accreting through the boundary layer mechanism. However, given the rapid (<2 Myr) evolution of early Herbig stars to the main-sequence phase, studying the evolution of the circumstellar medium around these stars can be a cumbersome exercise.
Aims: In this work, we study the samp…
Chemical characterisation of the X-shooter Spectral Library (XSL): [Mg/Fe] and [Ca/Fe] abundances
Palicio, P. A.; Vazdekis, A.; Sánchez-Blázquez, P. +1 more
Context. The X-shooter Spectral Library (XSL) is a large empirical stellar library used as a benchmark for the development of stellar population models. The inclusion of α-element abundances is crucial to disentangling the chemical evolution of any stellar system.
Aims: The aim of this paper is to provide a catalogue of high-precision, accura…
An improved spectral extraction method for JWST/NIRSpec fixed slit observations
Thiébaut, E.; Langlois, M.; Ferruit, P. +4 more
The James Webb Space Telescope is performing beyond our expectations. Its Near Infrared Spectrograph (NIRSpec) provides versatile spectroscopic capabilities in the 0.6-5.3 µm wavelength range, where a new window is opening for studying Trans-Neptunian objects in particular. We propose a spectral extraction method for NIRSpec fixed slit observation…
Influence of the interstellar magnetic field and 11-year cycle of solar activity on the heliopause nose location
Bladek, Piotr; Ratkiewicz, Romana
Context. The heliosphere is formed by the interaction between the solar wind (SW) plasma emanating from the Sun and a magnetised component of local interstellar medium (LISM) inflowing on the Sun. A separation surface called the heliopause (HP) forms between the SW and the LISM.
Aims: In this article, we define the nose of the HP and investig…
StarHorse results for spectroscopic surveys with Gaia EDR3: Chrono-chemical populations in the solar vicinity, the genuine thick disk, and young alpha-rich stars (Corrigendum)
Valentini, M.; Anders, F.; Chiappini, C. +16 more
The revised catalog is only available at the CDS via anonymous ftp to cdsarc.cds.unistra.fr (ftp://130.79.128.5) or via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/676/C6