Publications (24)
Forbush decreases and 2-day GCR flux non-recurrent variations studied with LISA Pathfinder
C. Grimani, M. Armano, H. Audley +82
Non-recurrent short term variations of the galactic cosmic-ray (GCR) flux above 70 MeV n were observed between 2016 February 18 and 2017 July 3 aboard the European Space Age…
Charge-induced force-noise on free-falling test masses: results from LISA Pathfinder
M. Armano, H. Audley, G. Auger +91
We report on electrostatic measurements made on board the European Space Agency mission LISA Pathfinder. Detailed measurements of the charge-induced electrostatic forces exerted on…
Temperature stability in the sub-milliHertz band with LISA Pathfinder
M. Armano, H. Audley, J. Baird +79
LISA Pathfinder (LPF) was a technology pioneering mission designed to test key technologies required for gravitational wave detection in space. In the low frequency regime (milli-H…
Micrometeoroid Events in LISA Pathfinder
James Ira Thorpe, Jacob Slutsky, John Baker +104
The zodiacal dust complex, a population of dust and small particles that pervades the Solar System, provides important insight into the formation and dynamics of planets, comets, a…
Charged Boson Stars and Vacuum Instabilities
P. Jetzer, P. Liljenberg, B. -S. Skagerstam
We consider charged boson stars and study their effect on the structure of the vacuum. For very compact particle like ``stars", with constituent mass close to the Planck ma…
STE-QUEST - Test of the Universality of Free Fall Using Cold Atom Interferometry
D. Aguilera, H. Ahlers, B. Battelier +63
The theory of general relativity describes macroscopic phenomena driven by the influence of gravity while quantum mechanics brilliantly accounts for microscopic effects. Despite th…
LISA Pathfinder Performance Confirmed in an Open-Loop Configuration: Results from the Free-Fall Actuation Mode
M. Armano, H. Audley, J. Baird +75
We report on the results of the LISA Pathfinder (LPF) free-fall mode experiment, in which the control force needed to compensate the quasistatic differential force acting on two te…
Colour and stellar population gradients in galaxies
C. Tortora, N. R. Napolitano, V. F. Cardone +3
We discuss the colour, age and metallicity gradients in a wide sample of local SDSS early- and late-type galaxies. From the fitting of stellar population models we find that metall…
Solar Research Programs at IRSOL, Switzerland
R. Ramelli, M. Bianda, J. O. Stenflo +1
The Zurich IMaging POLarimeter (ZIMPOL) developed at ETH Zurich and installed permanently at the Gregory Coude Telescope at Istituto Ricerche Solari Locarno (IRSOL) allows a polari…
The Gravitational Universe
The eLISA Consortium, :, P. Amaro Seoane +158
The last century has seen enormous progress in our understanding of the Universe. We know the life cycles of stars, the structure of galaxies, the remnants of the big bang, and hav…
Free-flight experiments in LISA Pathfinder
M. Armano, H. Audley, G. Auger +89
The LISA Pathfinder mission will demonstrate the technology of drag-free test masses for use as inertial references in future space-based gravitational wave detectors. To accomplis…
Characteristics and energy dependence of recurrent galactic cosmic-ray flux depressions and of a Forbush decrease with LISA Pathfinder
M. Armano, H. Audley, J. Baird +82
Galactic cosmic-ray (GCR) energy spectra observed in the inner heliosphere are modulated by the solar activity, the solar polarity and structures of solar and interplanetary origin…
Gravitational Microlensing by Globular Clusters
P. Jetzer, M. Strässle, U. Wandeler
Stars in globular clusters can act either as sources for MACHOs (Massive Astrophysical Compact Halo Objects) located along the line of sight or as lenses for more distant backgroun…
In-depth analysis of LISA Pathfinder performance results: Time evolution, noise projection, physical models, and implications for LISA
M. Armano, H. Audley, J. Baird +77
We present an in-depth analysis of the LISA Pathfinder differential acceleration performance over the entire course of its science operations, spanning approximately 500 days. We f…
Modulation of LISA free-fall orbits due to the Earth-Moon system
M. Cerdonio, F. De Marchi, R. De Pietri +5
We calculate the effect of the Earth-Moon (EM) system on the free-fall motion of LISA test masses. We show that the periodic gravitational pulling of the EM system induces a resona…
The Anomaly in the Candidate Microlensing Event PA-99-N2
AGAPE Collaboration, J. H. An, N. W. Evans +14
The lightcurve of PA-99-N2, one of the recently announced microlensing candidates towards M31, shows small deviations from the standard Paczynski form. We explore a number of possi…
Q0045-3337: models including strong lensing by a spiral galaxy
M. Chieregato, M. Miranda, P. Jetzer
Aims. Falomo et al. (2005) discovered a disk-like galaxy at ~ 1.2 arcsec from the QSO Q0045-3337 by means of ESO VLT adaptive optics. They estimated a galaxy Einstein radius (for a…
Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review
A. Addazi, J. Alvarez-Muniz, R. Alves Batista +157
The exploration of the universe has recently entered a new era thanks to the multi-messenger paradigm, characterized by a continuous increase in the quantity and quality of experim…
Spacecraft and interplanetary contributions to the magnetic environment on-board LISA Pathfinder
M. Armano, H. Audley, J. Baird +79
LISA Pathfinder (LPF) has been a space-based mission designed to test new technologies that will be required for a gravitational wave observatory in space. Magnetically driven forc…
On Gravitational Waves in Spacetimes with a Nonvanishing Cosmological Constant
J. Näf, P. Jetzer, M. Sereno
We study the effect of a cosmological constant on the propagation and detection of gravitational waves. To this purpose we investigate the linearised Einstein's equations with…
Calibrating the system dynamics of LISA Pathfinder
M. Armano, H. Audley, J. Baird +75
LISA Pathfinder (LPF) was a European Space Agency mission with the aim to test key technologies for future space-borne gravitational-wave observatories like LISA. The main scientif…
Thermal equilibrium of molecular clouds in cooling flow clusters
D. Puy, L. Grenacher, P. Jetzer
In many clusters of galaxies there is evidence for cooling flows in the central regions. The ultimate fate of the gas which cools is still unknown. A possibility is that a fraction…
Charging of free-falling test masses in orbit due to cosmic rays: results from LISA Pathfinder
LISA Pathfinder Collaboration, M. Armano, H. Audley +72
A comprehensive summary of the measurements made to characterize test mass charging due to the space environment during the LISA Pathfinder mission is presented. Measurements of th…
Precision Charge Control for Isolated Free-Falling Test Masses: LISA Pathfinder Results
M. Armano, H. Audley, J. Baird +82
The LISA Pathfinder charge management device was responsible for neutralising the cosmic ray induced electric charge that inevitably accumulated on the free-falling test masses at…