Search Publications
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…
The spectroscopic evolution of the recurrent nova T Pyxidis during its 2011 outburst. III. The ultraviolet development from iron curtain through the post-X-ray turnoff
Sion, E. M.; Shore, S. N.; Mason, E. +3 more
We continue the analysis of the multiwavelength evolution of the recurrent nova T Pyx during its 2011 outburst, focussing on the spectral development on the 1150-3000 Å region. This extraordinary data set presents the longest temporal baseline high resolution view of the ultraviolet for any nova to date (classical or recurrent). The observations c…
Transmission and conversion of magnetoacoustic waves on the magnetic canopy in a quiet Sun region
Tziotziou, K.; Tsiropoula, G.; Kontogiannis, I.
Context. We present evidence for the conversion and transmission of wave modes on the magnetic flux tubes that constitute mottles and form the magnetic canopy in a quiet Sun region.
Aims: Our aim is to highlight the details and the key parameters of the mechanism that produces power halos and magnetic shadows around the magnetic network obser…
Thermal structure of a hot non-flaring corona from Hinode/EIS
Del Zanna, G.; Reale, F.; Testa, P. +1 more
Aims: In previous studies, a very hot plasma component has been diagnosed in solar active regions through the images in three different narrow-band channels of Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory (SDO). This diagnostic from extreme ultraviolet (EUV) imaging data has also been supported by the matching mo…