Search Publications
The Lyman Alpha Reference Sample. XII. Morphology of extended Lyman alpha emission in star-forming galaxies
Östlin, G.; Hayes, M.; Kunth, D. +7 more
Aims: We use Hubble Space Telescope data of 45 nearby star-forming galaxies to investigate properties of Lyman-alpha (Lyα) halos, Lyα morphology, and the star-forming characteristics of galaxies. We study how the morphology of Lyα emission is related to other Lyα observables. Furthermore, we study the interdependencies of Lyα morphological qu…
Occurrence and statistics of IRIS bursts
Kleint, Lucia; Panos, Brandon
Small reconnection events in the lower solar atmosphere can lead to its heating, but whether such heating can propagate into higher atmospheric layers and potentially contribute to coronal heating is an open question. We carry out a large statistical analysis of all IRIS observations from 2013 and 2014. We identified "IRIS burst" (IB) spectra usin…
APOGEE-2S view of the globular cluster Patchick 125 (Gran 3). New metallicity and elemental abundances from high-resolution spectroscopy
Minniti, Dante; Fernández-Trincado, José G.; Villanova, Sandro +1 more
We present detailed elemental abundances, radial velocity, and orbital elements for Patchick 125, a recently discovered metal-poor globular cluster (GC) in the direction of the Galactic bulge. Near-infrared high-resolution (R ∼ 22 500) spectra of two members were obtained during the second phase of the Apache Point Observatory Galactic Evolution E…
Unveiling the past evolution of the progenitor of the Helmi streams
Helmi, A.; Cassisi, S.; Gallart, C. +2 more
Aims: We aim to determine unique features that characterise the past evolution of the progenitor of the Helmi streams through the analysis of star formation histories (SFHs).
Methods: From the 5D Gaia EDR3 dataset, we extracted local samples of stars dominated by the Helmi streams, the Galactic (thick and thin) disc, and the local retrog…
The super-soft source phase of the recurrent nova V3890 Sgr
Ness, J. -U.; Pinto, C.; Singh, K. P. +9 more
Context. The 30-yr recurrent symbiotic nova V3890 Sgr exploded on 2019 August 28 and was observed with multiple X-ray telescopes. Swift and AstroSat monitoring revealed slowly declining hard X-ray emission from shocks between the nova ejecta and the stellar wind of the companion. Later, highly variable super-soft-source (SSS) emission was seen. An…
V456 Cyg: An eclipsing binary with tidally perturbed g-mode pulsations
Southworth, J.; Bowman, D. M.; Van Reeth, T. +1 more
Context. Many well-known bright stars have been observed by the ongoing transiting exoplanet survey satellite (TESS) space mission. For several of them, these new data reveal previously unobserved variability, such as tidally perturbed pulsations in close binary stars.
Aims: Using newly detected gravity-mode (g-mode) pulsations in V456 Cyg, w…
MHD study of the planetary magnetospheric response during extreme solar wind conditions: Earth and exoplanet magnetospheres applications
Pantellini, F.; Zarka, P.; Varela, J. +3 more
Context. The stellar wind and the interplanetary magnetic field modify the topology of planetary magnetospheres. Consequently, the hazardous effect of the direct exposition to the stellar wind, for example, regarding the integrity of satellites orbiting the Earth or the habitability of exoplanets, depends upon the space weather conditions.
Ai…
Molecular gas properties of Planck-selected protocluster candidates at z ≃ 1.3-3
Kneissl, R.; Dole, H.; Frye, B. L. +3 more
We report on IRAM 30-m/EMIR observations of 38 Herschel sources chosen as the brightest red submillimeter (submm) sources in 18 Planck-selected fields drawn from the Planck high-z (PHz) sample of protocluster candidates. These fields host overdensities of red Herschel sources, with high star formation rates (∼10 000 M⊙ yr−1),…
Dynamical masses for two M1 + mid-M dwarf binaries monitored during the SPHERE-SHINE survey
Henning, T.; Messina, S.; D'Orazi, V. +25 more
We present orbital fits and dynamical masses for HIP 113201AB and HIP 36985AB, two M1 + mid-M dwarf binary systems monitored as part of the SPHERE-SHINE survey. To robustly determine the age of both systems via gyrochronology, we undertook a photometric monitoring campaign for HIP 113201 and GJ 282AB, the two wide K star companions to HIP 36985, u…
Probing red supergiant dynamics through photo-center displacements measured by Gaia
Chiavassa, A.; de Mink, S. E.; Davies, B. +2 more
Context. Red supergiant (RSGs) are cool massive stars in a late phase of their evolution when the stellar envelope becomes fully convective. They are the brightest stars in the universe at infrared light and can be detected in galaxies far beyond the Local Group, allowing for accurate determination of chemical composition of galaxies. The study of…