Search Publications
MACS J0416.1-2403: Impact of line-of-sight structures on strong gravitational lensing modelling of galaxy clusters
Grillo, C.; Balestra, I.; Rosati, P. +5 more
Exploiting the powerful tool of strong gravitational lensing by galaxy clusters to study the highest-redshift Universe and cluster mass distributions relies on precise lens mass modelling. In this work, we aim to present the first attempt at modelling line-of-sight (LOS) mass distribution in addition to that of the cluster, extending previous mode…
Investigating the young solar system analog HD 95086. A combined HARPS and SPHERE exploration
Avenhaus, H.; Henning, T.; Ginski, C. +56 more
Context. HD 95086 (A8V, 17 Myr) hosts a rare planetary system for which a multi-belt debris disk and a giant planet of 4-5 MJup have been directly imaged.
Aims: Our study aims to characterize the global architecture of this young system using the combination of radial velocity and direct imaging observations. We want to characteriz…
Disentangling the AGN and star formation connection using XMM-Newton
Georgantopoulos, I.; Magdis, G.; Masoura, V. A. +3 more
There is growing evidence supporting the coeval growth of galaxies and their resident super-massive black hole (SMBH). Most studies also claim a correlation between the activity of the SMBH and the star formation of the host galaxy. It is unclear, however, whether this correlation extends to all redshifts and X-ray luminosities. Some studies find …
With and without spectroscopy: Gaia DR2 proper motions of seven ultra-faint dwarf galaxies
Massari, D.; Helmi, A.
Aims: We present mean absolute proper motion measurements for seven ultra-faint dwarf galaxies orbiting the Milky Way, namely Boötes III, Carina II, Grus II, Reticulum II, Sagittarius II, Segue 2, and Tucana IV. For four of these dwarfs our proper motion estimate is the first ever provided.
Methods: The adopted astrometric data come from…
C-GOALS. II. Chandra observations of the lower luminosity sample of nearby luminous infrared galaxies in GOALS
Sanders, D. B.; Inami, H.; Armus, L. +14 more
We analyze Chandra X-ray observatory data for a sample of 63 luminous infrared galaxies (LIRGs), sampling the lower-infrared luminosity range of the Great Observatories All-Sky LIRG survey (GOALS), which includes the most luminous infrared selected galaxies in the local Universe. X-rays are detected for 84 individual galaxies within the 63 systems…
Infrared spectra of complex organic molecules in astronomically relevant ice matrices. I. Acetaldehyde, ethanol, and dimethyl ether
van Dishoeck, E. F.; Boogert, A. C. A.; Linnartz, H. +2 more
Context. The number of identified complex organic molecules (COMs) in inter- and circumstellar gas-phase environments is steadily increasing. Recent laboratory studies show that many such species form on icy dust grains. At present only smaller molecular species have been directly identified in space in the solid state. Accurate spectroscopic labo…
Super star cluster feedback driving ionization, shocks and outflows in the halo of the nearby starburst ESO 338-IG04
Östlin, G.; Hayes, M.; Adamo, A. +4 more
Context. Stellar feedback strongly affects the interstellar medium (ISM) of galaxies. Stellar feedback in the first galaxies likely plays a major role in enabling the escape of LyC photons, which contribute to the re-ionization of the Universe. Nearby starburst galaxies serve as local analogues allowing for a spatially resolved assessment of the f…
Radio continuum emission in the northern Galactic plane: Sources and spectral indices from the THOR survey
Menten, K. M.; Klessen, R. S.; Beuther, H. +15 more
Context Radio continuum surveys of the Galactic plane can find and characterize H II regions, supernova remnants (SNRs), planetary nebulae (PNe), and extragalactic sources. A number of surveys at high angular resolution (≤25″) at different wavelengths exist to study the interstellar medium (ISM), but no comparable high-resolution and hi…
When binaries keep track of recent nucleosynthesis. The Zr-Nb pair in extrinsic stars as an s-process diagnostic
Jorissen, A.; Escorza, A.; Masseron, T. +9 more
Context. Barium stars are s-process enriched giants. They owe their chemical peculiarities to a past mass transfer phase. During this phase they were polluted by their binary companion, which at the time was an asymptotic giant branch (AGB) star, but is now an extinct white dwarf. Barium stars are thus ideal targets for understanding and constrain…
The dense cores and filamentary structure of the molecular cloud in Corona Australis: Herschel SPIRE and PACS observations from the Herschel Gould Belt Survey
White, G. J.; André, Ph.; Arzoumanian, D. +16 more
We present a catalogue of prestellar and starless cores within the Corona Australis molecular cloud using photometric data from the Herschel Space Observatory. At a distance of d 130 pc, Corona Australis is one of the closest star-forming regions. Herschel has taken multi-wavelength data of Corona Australis with both the Spectral and Photometric I…