Search Publications
Collisional modelling of the debris disc around HIP 17439
Krivov, A. V.; Eiroa, C.; Löhne, T. +3 more
We present an analysis of the debris disc around the nearby K2 V star HIP 17439. In the context of the Herschel DUNES key programme, the disc was observed and spatially resolved in the far-IR with the Herschel PACS and SPIRE instruments. In a previous study, we assumed that the size and radial distribution of the circumstellar dust are independent…
Constraints on the subsurface structure and density of the nucleus of Comet 67P/Churyumov-Gerasimenko from Arecibo radar observations
Lamy, P. L.; Toth, I.; Herique, A. +1 more
Context. Little is known about the internal structure of cometary nuclei. In addition to understanding their accretion in the early solar nebula and their subsequent evolution in the solar system, we find this question to be of acute and timely interest in the case of 67P/Churyumov-Gerasimenko (hereafter 67P/C-G) due to be visited by the Rosetta s…
Hierarchical analysis of the quiet-Sun magnetism
Asensio Ramos, A.; Martínez González, M. J.
Standard statistical analysis of the magnetic properties of the quiet Sun rely on simple histograms of quantities inferred from maximum-likelihood estimations. Because of the inherent degeneracies, either intrinsic or induced by the noise, this approach is not optimal and can lead to highly biased results. We carried out a meta-analysis of the mag…
A search for Fermi bursts associated with supernovae and their frequency of occurrence
Della Valle, M.; Li, L.; Wang, Y. +7 more
Context. Observations suggest that most long duration gamma-ray bursts (GRBs) are connected with broad-line supernovae Ib/c, (SNe-Ibc). The presence of GRB-SNe is revealed by rebrightenings emerging from the optical GRB afterglow 10-15 days, in the rest-frame of the source, after the prompt GRB emission.
Aims: Fermi/GBM has a field of view (F…
The tiny globulettes in the Carina nebula
Gahm, G. F.; Grenman, T.
Context. Small molecular cloudlets are abundant in many H ii regions surrounding newborn stellar clusters. In optical images these so-called globulettes appear as dark silhouettes against the bright nebular background.
Aims: We aim to make an inventory of the population of globulettes in the Carina nebula complex, and to derive sizes and mass…
The 2XMMi/SDSS Galaxy Cluster Survey. III. Clusters associated with spectroscopically targeted luminous red galaxies in SDSS-DR10
Takey, A.; Schwope, A.; Lamer, G.
We present a sample of 383 X-ray selected galaxy groups and clusters with spectroscopic redshift measurements (up to z ~ 0.79) from the 2XMMi/SDSS Galaxy Cluster Survey. The X-ray cluster candidates were selected as serendipitously detected sources from the 2XMMi-DR3 catalogue that were located in the footprint of the Sloan Digital Sky Survey (SDS…
The EUV spectrum of the Sun: SOHO CDS NIS radiances during solar cycle 23
Andretta, V.; Del Zanna, G.
For the first time, we present and discuss EUV radiances of the solar transition region (TR) and corona obtained during a solar cycle. The measurements were obtained with the SOHO/coronal diagnostic spectrometer (CDS) during the period from 1996 to 2010. We find that limb-brightening significantly affects any characterisation of the solar radiance…
Magneto-seismological insights into the penumbral chromosphere and evidence for wave damping in spicules
Morton, R. J.
Aims: The observation of propagating magneto-hydrodynamic kink waves in magnetic structures and measurement of their properties (amplitude, phase speed) can be used to diagnose the plasma conditions in the neighbourhood of the magnetic structure via magneto-seismology. We aim to reveal properties of the chromosphere/transition region above th…
Some like it cold: molecular emission and effective dust temperatures of dense cores in the Pipe Nebula
Rathborne, Jill M.; Alves, João; Forbrich, Jan +4 more
Aims: The Pipe Nebula is characterized by a low star-formation rate and is therefore an ideal environment to explore how initial conditions, including core characteristics, affect star-formation efficiencies.
Methods: In a continued study of the molecular core population of the Pipe Nebula, we present a molecular-line survey of 52 cores.…
Properties of star forming galaxies in AKARI Deep Field-South
Buat, V.; Małek, K.; Burgarella, D. +6 more
Aims: The main aim of this work is the characterization of physical properties of galaxies detected in the far-infrared (FIR) in the AKARI Deep Field-South (ADF-S) survey.
Methods: Starting from a catalog of the 1000 brightest ADF-S sources in the WIDE-S (90 µm) AKARI band, we constructed a subsample of galaxies with spectral cover…