Search Publications
The paleolacustrine evolution of Juventae Chasma and Maja Valles and its implications for the formation of interior layered deposits on Mars
Jaumann, Ralf; Bishop, Janice L.; Gross, Christoph +4 more
Juventae Chasma, Mars, is an approximately 7 km deep basin located in close vicinity of Valles Marineris. It extends for ∼190 km east-west and ∼270 km north-south and exhibits several light-toned interior layered deposits (ILDs). These deposits form four large and distinctive light-toned mounds referred to as mound A, B, C, and D, from south to no…
Looking for dark matter trails in colliding galaxy clusters
Massey, Richard; Kneib, Jean-Paul; Harvey, David +1 more
If dark matter interacts, even weakly, via non-gravitational forces, simulations predict that it will be preferentially scattered towards the trailing edge of the halo during collisions between galaxy clusters. This will temporarily create a non-symmetric mass profile, with a trailing overdensity along the direction of motion. To test this hypothe…
A very dark stellar system lost in Virgo: kinematics and metallicity of SECCO 1 with MUSE
Bellazzini, M.; Testa, V.; Beccari, G. +11 more
We present the results of VLT-MUSE (Very Large Telescope-Multi Unit Spectroscopic Explorer) integral field spectroscopy of SECCO 1, a faint, star-forming stellar system recently discovered as the stellar counterpart of an ultracompact high-velocity cloud (HVC 274.68+74.0), very likely residing within a substructure of the Virgo cluster of galaxies…
Consistency of the Planck CMB data and ΛCDM cosmology
Hazra, Dhiraj Kumar; Shafieloo, Arman
We test the consistency between Planck temperature and polarization power spectra and the concordance model of Λ Cold Dark Matter cosmology (ΛCDM) within the framework of Crossing statistics. We find that Planck TT best fit ΛCDM power spectrum is completely consistent with EE power spectrum data while EE best fit ΛCDM power spectrum is not consist…
A comprehensive study of young B stars in NGC 2264 . I. Space photometry and asteroseismology
Fossati, L.; Przybilla, N.; Nieva, M. -F. +9 more
Context. Space photometric time series of the most massive members of the young open cluster NGC 2264 allow us to study their different sources of variability down to the millimagnitude level and permit a search for slowly pulsating B (SPB)-type pulsation among objects that are only a few million years old.
Aims: Our goal is to conduct a homo…
A systematic analysis of the XMM-Newton background: II. Properties of the in-Field-Of-View excess component
Tiengo, Andrea; De Luca, Andrea; Marelli, Martino +6 more
We present an accurate characterization of the particle background behaviour on XMM-Newton based on the entire EPIC archive. This corresponds to the largest EPIC data set ever examined. Our results have been obtained thanks to the collaboration between the FP7 European program EXTraS and the ESA R&D ATHENA activity AREMBES. We used as a diagno…
The transitional millisecond pulsar IGR J18245-2452 during its 2013 outburst at X-rays and soft gamma-rays
Stella, L.; Ferrigno, C.; Bozzo, E. +4 more
IGR J18245-2452/PSR J1824-2452I is one of the rare transitional accreting millisecond X-ray pulsars, showing direct evidence of switches between states of rotation-powered radio pulsations and accretion-powered X-ray pulsations, dubbed transitional pulsars. IGR J18245-2452 with a spin frequency of 254.3 Hz is the only transitional pulsar so far to…
X-ray bounds on the r-mode amplitude in millisecond pulsars
Güver, Tolga; Vurgun, Eda; Schwenzer, Kai +1 more
r-mode asteroseismology provides a unique way to study the internal composition of compact stars. Due to their precise timing, recycled millisecond radio pulsars present a particularly promising class of sources. Although their thermal properties are still poorly constrained, X-ray data is very useful for asteroseismology since r-modes could stron…
The massive multiple system HD 64315
Montes, D.; Simón-Díaz, S.; Evans, C. J. +4 more
Context. The O6 Vn star HD 64315 is believed to belong to the star-forming region known as NGC 2467, but previous distance estimates do not support this association. Moreover, it has been identified as a spectroscopic binary, but existing data support contradictory values for its orbital period.
Aims: We explore the multiple nature of this st…
Test of Weak Equivalence Principle with the Multi-band Timing of the Crab Pulsar
Zhang, Yueyang; Gong, Biping
The Weak Equivalent Principle (WEP) can be tested through the parameterized post-Newtonian parameter γ, representing the space curvature produced by unit rest mass. The parameter γ in turn has been constrained by comparing the arrival times of photons originating in distant transient events, such as gamma-ray bursts, fast radio bursts, and giant p…