Search Publications
CHEX-MATE: X-ray absorption and molecular content of the interstellar medium toward galaxy clusters
Pointecouteau, E.; Pratt, G. W.; Rossetti, M. +14 more
The X-ray spectrum of extragalactic sources, such as galaxy clusters, is affected by the photo-absorption of various components of the Galactic interstellar medium (ISM). The resulting spectral distortion contributes to the systematics of cluster temperature measurements. It essentially depends on the neutral (atomic+molecular) Galactic hydrogen d…
A machine learning algorithm for reliably predicting active galactic nucleus absorbing column densities
Ajello, M.; Marchesi, S.; Torres-Albà, N. +4 more
We present a new method for predicting the line-of-sight column density (NH) values of active galactic nuclei (AGN) based on mid-infrared (MIR), soft X-ray, and hard X-ray data. We developed a multiple linear regression machine learning algorithm trained with WISE colors, Swift-BAT count rates, soft X-ray hardness ratios, and an MIR-sof…
Star-forming brightest cluster galaxies at z ∼ 0.4 in KiDS. Further studies of cold gas and stellar properties
Castignani, G.; Moscardini, L.; Radovich, M. +10 more
Brightest cluster galaxies (BCGs) at the centers of clusters are among the most massive galaxies in the Universe. Their star formation history and stellar mass assembly are highly debated. Recent studies suggest the presence of an emerging population of intermediate-z star-forming and gas-rich BCGs, whose molecular gas reservoirs that feed star fo…
Unveiling the chemical fingerprint of phosphorus-rich stars. I. In the infrared region of APOGEE-2
Masseron, Thomas; Hayes, Christian R.; Pignatari, Marco +4 more
Context The origin of phosphorus, one of the essential elements for life on Earth, is currently unknown. Prevalent models of Galactic chemical evolution (GCE) systematically underestimate the amount of P compared to observations, especially at low metallicities. The recently discovered P-rich ([P/Fe] ≳ 1.2 dex) and metal-poor ([Fe/H] ≃ −1.0 dex) g…
Chasing extreme planetary architectures. I. HD 196885 Ab, a super-Jupiter dancing with two stars?
Bouchy, F.; Kervella, P.; Udry, S. +21 more
Context. Planet(s) in binaries are unique architectures for testing predictions of planetary formation and evolution theories in very hostile environments. Their presence in such a highly perturbed region poses a clear challenge from the early phase of planetesimals accretion to the dynamical evolution and stability through a very long period of t…
Time-resolved spectral catalogue of INTEGRAL/SPI gamma-ray bursts
Greiner, Jochen; Biltzinger, Björn; Burgess, J. Michael
Since its launch in 2002, the International Gamma-Ray Astrophysics Laboratory (INTEGRAL) satellite has detected many gamma-ray bursts (GRBs), which are summarised in the INTEGRAL Burst Alert System (IBAS) catalogue. This catalogue combines triggers from the data of the Imager on Board the INTEGRAL (IBIS) and of the anti-coincident shield (ACS) of …
Tracing obscured galaxy build-up at high redshift using deep radio surveys
Matute, Israel; Amarantidis, Stergios; Farrah, Duncan +5 more
Context. A fundamental question of extra-galactic astronomy that is yet to be fully understood, concerns the evolution of the star formation rate (SFR) and supermassive black hole (SMBH) activity with cosmic time, as well as their interplay and how it impacts galaxy evolution. A primary focus that could shed more light on these questions is the st…
Toward a 3D kinetic tomography of Taurus clouds. II. A new automated technique and its validation
Arenou, F.; Babusiaux, C.; Hottier, C. +4 more
Context. Three-dimensional (3D) kinetic maps of the Milky Way interstellar medium are an essential tool in studies of its structure and of star formation.
Aims: We aim to assign radial velocities to Galactic interstellar clouds now spatially localized based on starlight extinction and star distances from Gaia and stellar surveys.
Methods…
Structure of the accretion flow of IX Velorum as revealed by high-resolution spectroscopy
Pala, A. F.; Schmidtobreick, L.; Kára, J. +1 more
Context. Several high mass-transfer cataclysmic variables show evidence of outflow from the system, which could play an important role in their evolution. We investigate the system IX Vel, which was proposed to show similar characteristics.
Aims: We study the structure of the IX Vel system, particularly the structure of its accretion flow and…
Semi-analytic calculations for extended mid-infrared emission associated with FU Ori-type objects
Liu, Sheng-Yuan; Takami, Michihiro; Wang, Shiang-Yu +4 more
Aims: Near-infrared imaging polarimetry at high-angular resolutions has revealed an intriguing distribution of circumstellar dust toward FU Ori-type objects (FUors). These dust grains are probably associated with either an accretion disk or an infalling envelope. Follow-up observations in the mid-infrared would lead us to a better understandi…