Search Publications
Gaia eclipsing binary and multiple systems. Supervised classification and self-organizing maps
Rimoldini, L.; Holl, B.; Mowlavi, N. +6 more
Context. Large surveys producing tera- and petabyte-scale databases require machine-learning and knowledge discovery methods to deal with the overwhelming quantity of data and the difficulties of extracting concise, meaningful information with reliable assessment of its uncertainty. This study investigates the potential of a few machine-learning m…
Fe K and ejecta emission in SNR G15.9+0.2 with XMM-Newton
Acero, Fabio; Maggi, Pierre
Aims: We present a study of the Galactic supernova remnant SNR G15.9+0.2 with archival XMM-Newton observations.
Methods: EPIC data are used to investigate the morphological and spectral properties of the remnant, searching in particular for supernova ejecta and Fe K line emission. By comparing the SNR's X-ray absorption column density wi…
Interstellar medium conditions in z 0.2 Lyman-break analogs
Berta, S.; Magnelli, B.; Lutz, D. +16 more
We present an analysis of far-infrared (FIR) [CII] and [OI] fine structure line and continuum observations obtained with Herschel/PACS, and 12CO(1-0) observations obtained with the IRAM Plateau de Bure Interferometer, of Lyman-break analogs (LBAs) at z 0.2. The principal aim of this work is to determine the typical interstellar medium (…
The chemical structure of the Class 0 protostellar envelope NGC 1333 IRAS 4A
Caux, E.; van der Tak, F. F. S.; Boogert, A. C. A. +2 more
Context. It is not well known what drives the chemistry of a protostellar envelope, in particular the role of the stellar mass and the protostellar outflows on the chemical enrichment of such environments.
Aims: We study the chemical structure of the Class 0 protostellar envelope NGC 1333 IRAS 4A in order to (I) investigate the influence of t…
A search for pre- and proto-brown dwarfs in the dark cloud Barnard 30 with ALMA
Ménard, F.; de Gregorio-Monsalvo, I.; Eiroa, C. +9 more
Context. The origin of brown dwarfs is still under debate. While some models predict a star-like formation scenario, others invoke a substellar mass embryo ejection, a stellar disk fragmentation, or the photo-evaporation of an external core due to the presence of massive stars.
Aims: The aim of our work is to characterize the youngest and low…
XMM-Newton and INTEGRAL view of the hard state of EXO 1745-248 during its 2015 outburst
Stella, L.; de Martino, D.; Rea, N. +10 more
Context. Transient low-mass X-ray binaries (LMXBs) often show outbursts that typically last a few weeks and are characterized by a high X-ray luminosity (Lx ≈ 1036-1038 erg s-1), while most of the time they are found in X-ray quiescence (LX ≈ 1031-1033 erg s-1)…
CoRoT 223992193: Investigating the variability in a low-mass, pre-main sequence eclipsing binary with evidence of a circumbinary disk
Aigrain, S.; Gandolfi, D.; Bouvier, J. +10 more
CoRoT 223992193 is the only known low-mass, pre-main sequence eclipsing binary that shows evidence of a circumbinary disk. The system displays complex photometric and spectroscopic variability over a range of timescales and wavelengths. Using two optical CoRoT runs from 2008 and 2011/2012 (spanning 23 and 39 days), along with infrared Spitzer 3.6 …
Suprathermal helium in corotating interaction regions: combined observations from SOHO/CELIAS/STOF and ACE/SWICS
Bochsler, P.; Klecker, B.; Berger, L. +4 more
Context. Energetic particle enhancements that are associated with corotating interaction regions (CIRs) are typically believed to arise from the sunward propagation of particles that are accelerated by CIR-driven shocks beyond 1 AU. It is expected that these sunward-travelling particles will lose energy and scatter, resulting in a turnover of the …
Gaia eclipsing binary and multiple systems. A study of detectability and classification of eclipsing binaries with Gaia
Rimoldini, L.; Holl, B.; Mowlavi, N. +5 more
Context. In the new era of large-scale astronomical surveys, automated methods of analysis and classification of bulk data are a fundamental tool for fast and efficient production of deliverables. This becomes ever more important as we enter the Gaia era.
Aims: We investigate the potential detectability of eclipsing binaries with Gaia using a…
Simulated Galactic methanol maser distribution to constrain Milky Way parameters
Reid, M. J.; Quiroga-Nuñez, L. H.; van Langevelde, H. J. +1 more
Context. Using trigonometric parallaxes and proper motions of masers associated with massive young stars, the Bar and Spiral Structure Legacy (BeSSeL) survey has reported the most accurate values of the Galactic parameters so far. The determination of these parameters with high accuracy has a widespread impact on Galactic and extragalactic measure…