419 citations · 972 across the 14 of their papers we have counts for
14 papers
Seasonal Mass Transfer on the Nucleus of Comet 67P/Chuyumov-Gerasimenko
H. U. Keller, S. Mottola, S. F. Hviid +47
We collect observational evidence that supports the scheme of mass transfer on the nucleus of comet 67P/Churyumov-Gerasimenko. The obliquity of the rotation axis of 67P causes stro…
The dust environment of comet 67P/Churyumov-Gerasimenko from Rosetta OSIRIS and VLT observations in the 4.5 to 2.9 au heliocentric distance range inbound
F. Moreno, C. Snodgrass, O. Hainaut +51
The ESA Rosetta spacecraft, currently orbiting around comet 67P, has already provided in situ measurements of the dust grain properties from several instruments, particularly OSIRI…
Are fractured cliffs the source of cometary dust jets ? Insights from OSIRIS/Rosetta at 67P
J. -B. Vincent, N. Oklay, M. Pajola +52
Dust jets, i.e. fuzzy collimated streams of cometary material arising from the nucleus, have been observed in-situ on all comets since the Giotto mission flew by comet 1P/Halley in…
Optical phase coherent timing of the Crab nebula pulsar with Iqueye at the ESO New Technology Telescope
L. Zampieri, A. Čadež, C. Barbieri +6
The Crab nebula pulsar was observed in 2009 January and December with a novel very fast optical photon counter, Iqueye, mounted at the ESO 3.5 m New Technology Telescope. Thanks to…
Aqueye optical observations of the Crab Nebula pulsar
C. Germanà, L. Zampieri, C. Barbieri +12
We observed the Crab pulsar in October 2008 at the Copernico Telescope in Asiago - Cima Ekar with the optical photon counter Aqueye (the Asiago Quantum Eye) which has the best temp…
The Crab pulsar seen with Aqueye at Asiago Cima Ekar Observatory
L. Zampieri, C. Germanà, C. Barbieri +9
We are developing fast photon-counter instruments to study the rapid variability of astrophysical sources by time tagging photon arrival times with unprecedented accuracy, making u…
The optical light curve of the LMC pulsar B0540-69 in 2009
S. Gradari, M. Barbieri, C. Barbieri +7
This paper reports a detailed analysis of the optical light curve of PSR B0540-69, the second brightest pulsar in the visible band, obtained in 2009 (Jan. 18 and 20, and Dec. 14, 1…
First orbital solution for the non-thermal emitter Cyg OB2 #9
Y. Naze, Y. Damerdji, G. Rauw +7
After the first detection of its binary nature, the spectroscopic monitoring of the non-thermal radio emitter Cyg OB2 #9 (P=2.4yrs) has continued, doubling the number of available…
Inhomogeneities on the surface of 21 Lutetia, the asteroid target of the Rosetta mission
D. Perna, E. Dotto, M. Lazzarin +6
CONTEXT: In July 2010 the ESA spacecraft Rosetta will fly-by the main belt asteroid 21 Lutetia. Several observations of this asteroid have been so far performed, but its surface co…
Method to measure off-axis displacements based on the analysis of the intensity distribution of a vortex beam
G. Anzolin, F. Tamburini, A. Bianchini +1
We study the properties of the Fraunhofer diffraction patterns produced by Gaussian beams crossing spiral phase plates. We show, both analytically and numerically, that off-axis di…
A binary signature in the non-thermal radio-emitter Cyg OB2 #9
Y. Naze, M. De Becker, G. Rauw +1
Aims: Non-thermal radio emission associated with massive stars is believed to arise from a wind-wind collision in a binary system. However, the evidence of binarity is still lackin…
Optical vortices with starlight: Implications for ground-based stellar coronagraphy
F. Tamburini, G. Anzolin, G. Umbriaco +2
Using an l = 1 blazed fork-hologram at the focal plane of the Asiago 122 cm telescope, we obtained optical vortices from the stellar system Rasalgethi (alpha Herculis) and from the…
Overcoming the Rayleigh Criterion Limit with Optical Vortices
F. Tamburini, G. Anzolin, G. Umbriaco +2
We experimentally and numerically tested the separability of two independent equally-luminous monochromatic and white light sources at the diffraction limit, using Optical Vortices…
3C 345: The Historical Light Curve (1966-1991) from the digitized plates of the Asiago Observatory
A. Omizzolo, C. Barbieri, C. Rossi
In the frame of a large project to digitize the plate archives of the Italian and Vatican Astronomical Observatory, we have already performed the digitization of all available plat…