Search Publications
Aswan site on comet 67P/Churyumov-Gerasimenko: Morphology, boulder evolution, and spectrophotometry
Bertaux, Jean-Loup; Da Deppo, Vania; Naletto, Giampiero +49 more
Aims: We provide a detailed morphological analysis of the Aswan site on comet 67P/Churyumov-Gerasimenko (67P). We derive the size-frequency distribution of boulders ≥2 m and correlate this distribution with the gravitational slopes for the first time on a comet. We perform the spectral analysis of this region to understand if possible surface…
A milestone toward understanding PDR properties in the extreme environment of LMC-30 Doradus
Lebouteiller, V.; Madden, S. C.; Galliano, F. +11 more
Context. More complete knowledge of galaxy evolution requires understanding the process of star formation and the interaction between the interstellar radiation field and interstellar medium (ISM) in galactic environments traversing a wide range of physical parameter space. We focus on the impact of massive star formation on the surrounding low me…
Magnetic field morphology in nearby molecular clouds as revealed by starlight and submillimetre polarization
Miville-Deschênes, M. -A.; Boulanger, F.; Falgarone, E. +8 more
Within four nearby (d < 160 pc) molecular clouds, we statistically evaluated the structure of the interstellar magnetic field, projected on the plane of the sky and integrated along the line of sight, as inferred from the polarized thermal emission of Galactic dust observed by Planck at 353 GHz and from the optical and near-infrared polarizatio…
Anatomy of the AGN in NGC 5548. VIII. XMM-Newton's EPIC detailed view of an unexpected variable multilayer absorber
Kaastra, J. S.; Harrison, F. A.; Kriss, G. A. +21 more
In 2013, we conducted a large multi-wavelength campaign on the archetypical Seyfert 1 galaxy NGC 5548. Unexpectedly, this usually unobscured source appeared strongly absorbed in the soft X-rays during the entire campaign, and signatures of new and strong outflows were present in the almost simultaneous UV HST/COS data. Here we carry out a comprehe…
A new model for the X-ray continuum of the magnetized accreting pulsars
Ferrigno, Carlo; Becker, Peter A.; Bozzo, Enrico +1 more
Context. Accreting highly magnetized pulsars in binary systems are among the brightest X-ray emitters in our Galaxy. Although a number of high-quality broad-band (0.1-100 keV) X-ray observations are available, the spectral energy distribution of these sources is usually investigated by adopting pure phenomenological models rather than models linke…
Origin of central abundances in the hot intra-cluster medium. I. Individual and average abundance ratios from XMM-Newton EPIC
Zhang, Y. -Y.; Kaastra, J. S.; Mernier, F. +5 more
The hot intra-cluster medium (ICM) is rich in metals, which are synthesised by supernovae (SNe) explosions and accumulate over time into the deep gravitational potential well of clusters of galaxies. Since most of the elements visible in X-rays are formed by type Ia (SNIa) and/or core-collapse (SNcc) supernovae, measuring their abundances gives us…
Origin of central abundances in the hot intra-cluster medium. II. Chemical enrichment and supernova yield models
Zhang, Y. -Y.; Kaastra, J. S.; Mernier, F. +7 more
The hot intra-cluster medium (ICM) is rich in metals, which are synthesised by supernovae (SNe) and accumulate over time into the deep gravitational potential well of clusters of galaxies. Since most of the elements visible in X-rays are formed by type Ia (SNIa) and/or core-collapse (SNcc) supernovae, measuring their abundances gives us direct inf…
Hard X-ray emission of the luminous infrared galaxy NGC 6240 as observed by NuSTAR
Harrison, F. A.; Stern, D.; Alexander, D. M. +23 more
We present a broadband (~0.3-70 keV) spectral and temporal analysis of NuSTAR observations of the luminous infrared galaxy NGC 6240 combined with archival Chandra, XMM-Newton, and BeppoSAX data. NGC 6240 is a galaxy in a relatively early merger state with two distinct nuclei separated by ~1.̋5. Previous Chandra observations resolved the two nuclei …
Evolution of the stellar-merger red nova V1309 Scorpii: Spectral energy distribution analysis
Tylenda, R.; Kamiński, T.
Context. One very important object for understanding the nature of red novae is V1309 Sco. Its pre-outburst observations showed that, before its red-nova eruption in 2008, it was a contact binary quickly evolving to the merger of the components. It thus provided us with a direct evidence that the red novae result from stellar mergers.
Aims: W…
Limits on the LyC signal from z ~ 3 sources with secure redshift and HST coverage in the E-CDFS field
Maccagni, D.; Giavalisco, M.; Thomas, R. +23 more
Context. Determining the strength of the Lyman continuum (LyC) and the fraction of LyC escape have implications for the properties of the emitting sources at any redshift, but also for the re-ionization of the Universe at z > 6.
Aims: We aim to measure the LyC signal from a sample of sources in the Chandra deep field south. We collect star…