Search Publications
Statistics of the fractional polarization of compact radio sources in Planck maps
Toffolatti, Luigi; Bonavera, Laura; González-Nuevo, Joaquin +1 more
In this work, we apply the stacking technique to estimate the average fractional polarization from 30 to 353 GHz of a primary sample of 1560 compact sources - essentially all radio sources - detected in the 30 GHz Planck all-sky map and listed in the second version of the Planck Catalogue of Compact Sources (PCCS2). We divide our primary sample in…
Multiband study of RX J0838-2827 and XMM J083850.4-282759: a new asynchronous magnetic cataclysmic variable and a candidate transitional millisecond pulsar
D'Avanzo, P.; Campana, S.; Ribas, I. +23 more
In a search for the counterpart to the Fermi-LAT source 3FGL J0838.8-2829, we performed a multiwavelength campaign: in the X-ray band with Swift and XMM-Newton; in the infrared and optical with OAGH, ESO-NTT and IAC80; and in the radio with ATCA observations. We also used archival hard X-ray data obtained by INTEGRAL. We report on three X-ray sour…
How pristine is the interior of the comet 67P/Churyumov-Gerasimenko?
Longobardo, Andrea; Palomba, Ernesto; Zinzi, Angelo +14 more
Comets are usually considered to be the most primitive bodies in the Solar System. The level of truth of this paradigm, however, is a matter of debate, especially if by primitive we mean that they represent a sample of intact, unprocessed material. We now have the possibility of analysing the comet 67P/Churyumov-Gerasimenko with an unprecedented l…
Evidence for distributed gas sources of hydrogen halides in the coma of comet 67P/Churyumov-Gerasimenko
Neefs, Eddy; Mall, Urs; De Keyser, Johan +24 more
Rosetta has detected the presence of the hydrogen halides HF, HCl, and HBr in the coma of comet 67P/Churyumov-Gerasimenko. These species are known to freeze out on icy grains in molecular clouds. Analysis of the abundances of HF and HCl as a function of cometocentric distance suggests that these hydrogen halides are released both from the nucleus …
CLUMP-3D: three-dimensional lensing and multi-probe analysis of MACS J1206.2-0847, a remarkably regular cluster
Zitrin, Adi; Umetsu, Keiichi; Meneghetti, Massimo +5 more
Multi-wavelength techniques can probe the distribution and the physical properties of baryons and dark matter in galaxy clusters from the inner regions out to the peripheries. We present a full three-dimensional analysis combining strong and weak lensing, X-ray surface brightness and temperature, and the Sunyaev-Zel'dovich effect. The method is ap…
Mapping the three-dimensional dust extinction towards the supernova remnant S147 - the S147 dust cloud
Huang, Y.; Chen, B. -Q.; Wang, C. +7 more
We present a three-dimensional (3D) extinction analysis in the region towards the supernova remnant (SNR) S147 (G180.0-1.7) using multiband photometric data from the Xuyi Schmidt Telescope Photometric Survey of the Galactic Anticentre (XSTPS-GAC), 2MASS and WISE. We isolate a previously unrecognized dust structure likely to be associated with SNR …
H I absorption in nearby compact radio galaxies
Sadler, E. M.; Glowacki, M.; Allison, J. R. +6 more
H I absorption studies yield information on both active galactic nucleus (AGN) feeding and feedback processes. This AGN activity interacts with the neutral gas in compact radio sources, which are believed to represent the young or recently re-triggered AGN population. We present the results of a survey for H I absorption in a sample of 66 compact …
Broad-band characteristics of seven new hard X-ray selected cataclysmic variables
Mukai, K.; Israel, G.; de Martino, D. +5 more
We present timing and spectral analysis of a sample of seven hard X-ray selected cataclysmic variable candidates based on simultaneous X-ray and optical observations collected with XMM-Newton, complemented with Swift/BAT and INTEGRAL /IBIS hard X-ray data and ground-based optical photometry. For six sources, X-ray pulsations are detected for the f…
Rosetta photoelectron emission and solar ultraviolet flux at comet 67P
Edberg, N. J. T.; Simon Wedlund, C.; Andersson, L. +10 more
The Langmuir Probe instrument on Rosetta monitored the photoelectron emission current of the probes during the Rosetta mission at comet 67P/Churyumov-Gerasimenko, in essence acting as a photodiode monitoring the solar ultraviolet radiation at wavelengths below 250 nm. We have used three methods of extracting the photoelectron saturation current fr…
Late-time observations of the relativistic tidal disruption flare candidate Swift J1112.2-8238
Cenko, S. B.; Krühler, T.; Levan, A. J. +6 more
We present late-time follow-up of the relativistic tidal disruption flare (rTDF) candidate Swift J1112.2-8238. We confirm the previously determined redshift of z = 0.8900 ± 0.0005 based on multiple emission line detections. Hubble Space Telescope imaging of the host galaxy indicates a complex and distorted morphology with at least two spatially di…