Search Publications
Herschel observations of Hickson compact groups of galaxies: Unveiling the properties of cold dust
Le Floc'h, E.; Appleton, P. N.; da Cunha, E. +5 more
We present a Herschel far-infrared and sub-millimetre (sub-mm) study of a sample of 120 galaxies in 28 Hickson compact groups (HCGs). Fitting their UV to sub-mm spectral energy distributions with the model of da Cunha et al. (2008), we accurately estimate the dust masses, luminosities, and temperatures of the individual galaxies. We find that near…
XMM-Newton observations of 1A 0535+262 in quiescence
Tsygankov, S.; Santangelo, A.; Doroshenko, V. +3 more
Accretion onto magnetized neutron stars is expected to be centrifugally inhibited at low accretion rates. Several sources, however, are known to pulsate in quiescence at luminosities below the theoretical limit predicted for the onset of the centrifugal barrier. The source
GRB 120711A: an intense INTEGRAL burst with long-lasting soft γ-ray emission and a powerful optical flash
Covino, S.; Fugazza, D.; Greiner, J. +20 more
A long and intense γ-ray burst (GRB) was detected by INTEGRAL on 11 July 2012 with a duration of ~115 s and fluence of 2.8 × 10-4 erg cm-2 in the 20 keV-8 MeV energy range. GRB 120711A was at z ~ 1.405 and produced soft γ-ray emission (>20 keV) for at least ~10 ks after the trigger. The GRB was observed by several ground-b…
The yellow hypergiant HR 5171 A: Resolving a massive interacting binary in the common envelope phase
Smith, N.; Meilland, A.; Millour, F. +20 more
Context. Only a few stars are caught in the very brief and often crucial stages when they quickly traverse the Hertzsprung-Russell diagram, and none has yet been spatially resolved in the mass transfer phase.
Aims: We initiated long-term optical interferometry monitoring of the diameters of massive and unstable yellow hypergiants (YHG) with t…
Cross-correlation of cosmic far-infrared background anisotropies with large scale structures
Doré, O.; Lagache, G.; Serra, P. +2 more
We measure the cross-power spectra between luminous red galaxies (LRGs) from the Sloan Digital Sky Survey (SDSS)-III data release 8 (DR8) and cosmic infrared background (CIB) anisotropies from Planck and data from the Improved Reprocessing (IRIS) of the Infrared Astronomical Satellite (IRAS) at 353, 545, 857, and 3000 GHz, corresponding to 850, 55…
Can eccentric debris disks be long-lived?. A first numerical investigation and application to ζ2 Reticuli
Eiroa, C.; Marshall, J. P.; Montesinos, B. +13 more
Context. Imaging of debris disks has found evidence for both eccentric and offset disks. One hypothesis is that they provide evidence for massive perturbers, for example, planets or binary companions, which sculpt the observed structures. One such disk was recently observed in the far-IR by the Herschel Space Observatory around ζ2 Retic…
V838 Monocerotis: the central star and its environment a decade after outburst
Meilland, A.; Millour, F.; Chesneau, O. +8 more
Aims: V838 Monocerotis erupted in 2002, brightened in a series of outbursts, and eventually developed a spectacular light echo. A very red star emerged a few months after the outburst. The whole event has been interpreted as the result of a merger.
Methods: We obtained near- and mid-IR interferometric observations of
The X-CLASS-redMaPPer galaxy cluster comparison. I. Identification procedures
Pierre, M.; Faccioli, L.; Clerc, N. +5 more
Context. This paper is the first in a series undertaking a comprehensive correlation analysis between optically selected and X-ray-selected cluster catalogues. The rationale of the project is to develop a holistic picture of galaxy clusters utilising optical and X-ray-cluster-selected catalogues with well-understood selection functions.
Aims:…
Stellar laboratories. III. New Ba v, Ba vi, and Ba vii oscillator strengths and the barium abundance in the hot white dwarfs G191-B2B and RE 0503-289
Rauch, T.; Werner, K.; Kruk, J. W. +1 more
Context. For the spectral analysis of high-resolution and high-signal-to-noise (S/N) spectra of hot stars, state-of-the-art non-local thermodynamic equilibrium (NLTE) model atmospheres are mandatory. These are strongly dependent on the reliability of the atomic data that is used for their calculation.
Aims: Reliable Ba v-vii oscillator streng…
Glory revealed in disk-integrated photometry of Venus
Sánchez-Lavega, A.; Pérez-Hoyos, S.; García Muñoz, A.
Context. Reflected light from a spatially unresolved planet yields unique insight into the overall optical properties of the planet cover. Glories are optical phenomena caused by light that is backscattered within spherical droplets following a narrow distribution of sizes; they are well known on Earth as localised features above liquid clouds.