Search Publications
Disentangling the jet emission from protostellar systems. The ALMA view of VLA1623
Codella, C.; van Dishoeck, E. F.; Bruderer, S. +4 more
Context. High-resolution studies of class 0 protostars represent the key to constraining protostar formation models. VLA16234-2417 represents the prototype of class 0 protostars, and it has been recently identified as a triple non-coeval system.
Aims: We aim at deriving the physical properties of the jets in VLA16234-2417 using tracers of sho…
Seasonal changes in Saturn's stratosphere inferred from Cassini/CIRS limb observations
Flasar, F. M.; Spiga, A.; Fouchet, T. +4 more
We present temperature and hydrocarbons abundances (C2H6, C2H2, C3H8) retrieved from Cassini/CIRS limb spectra, acquired during northern spring in 2010 (LS = 12 °) and 2012 (LS = 31 °). We compare them to the previous limb measurements performed by Guerlet et a…
Evolution of stratospheric chemistry in the Saturn storm beacon region
Fletcher, Leigh N.; Irwin, Patrick G. J.; Moses, Julianne I. +4 more
The giant northern-hemisphere storm that erupted on Saturn in December 2010 triggered significant changes in stratospheric temperatures and species abundances that persisted for more than a year after the original outburst. The stratospheric regions affected by the storm have been nicknamed "beacons" due to their prominent infrared-emission signat…
Generation of large-scale magnetic fields, non-Gaussianity, and primordial gravitational waves in inflationary cosmology
Bamba, Kazuharu
The generation of large-scale magnetic fields in inflationary cosmology is explored, in particular, in a kind of moduli inflation motivated by racetrack inflation in the context of the type IIB string theory. In this model, the conformal invariance of the hypercharge electromagnetic fields is broken thanks to the coupling of both the scalar and ps…
A statistical analysis of Pi2-band waves in the plasma sheet and their relation to magnetospheric drivers
Zhang, T. L.; Nakamura, R.; Baumjohann, W. +5 more
We use the Cluster data from 2001 to 2009 to investigate the occurrence of Pi2-band waves in the plasma sheet. To study the generation mechanisms of these waves, we examine the association between Pi2-band waves and dynamic processes in the plasma sheet (fast flows and substorm activity) and the direction of the solar wind velocity. For a total of…
The interaction between ULF waves and thermal plasma ions at the plasmaspheric boundary layer during substorm activity
Ren, J.; Zong, Q. G.; Wang, Y. F. +1 more
During a substorm on 27 January 2004, energetic particle injections associated with ULF waves have been detected when Cluster fleet was traveling inbound in the Southern Hemisphere. Substorm-injected energetic particles are strong and clearly modulated by these ULF waves. The ULF waves with the period of 1 min are probably the third harmonic mode.…
NGC 6139: a normal massive globular cluster, or a first-generation dominated cluster? Clues from the light elements
Bragaglia, A.; D'Orazi, V.; Sneden, C. +5 more
Information on globular clusters (GC) formation mechanisms can be gathered by studying the chemical signature of the multiple populations that compose these stellar systems. In particular, we investigate the anti-correlations among O, Na, Al, and Mg to explore the influence of cluster mass and environment on GCs in the Milky Way and in extragalact…
MIARMA: A minimal-loss information method for filling gaps in time series. Application to CoRoT light curves
Garrido, R.; Suárez, J. C.; Pascual-Granado, J.
Context. Gaps in time series cause spurious frequencies in the power spectra. In light curves of pulsating stars, this hampers identifying the theoretical oscillation modes. When these gaps are smaller than the total time span, the commonly used approach to overcome these difficulties involves linear interpolation. The original frequency content o…
The benchmark black hole in NGC 4258: dynamical models from high-resolution two-dimensional stellar kinematics
Storchi-Bergmann, Thaisa; Riffel, Rogemar A.; Cappellari, Michele +2 more
NGC 4258 is the galaxy with the most accurate (maser-based) determination for the mass of the supermassive black hole (SMBH) in its nucleus. In this work, we present a two-dimensional mapping of the stellar kinematics in the inner 3.0 arcsec × 3.0 arcsec = 100 pc × 100 pc of NGC 4258 using adaptive-optics observations obtained with the Near-Infrar…
Analysis of Sunyaev-Zel'dovich effect mass-observable relations using South Pole Telescope observations of an X-ray selected sample of low-mass galaxy clusters and groups
Gladders, M. D.; Rest, A.; Foley, R. J. +63 more
We use microwave observations from the South Pole Telescope (SPT) to examine the Sunyaev-Zel'dovich effect (SZE) signatures of a sample of 46 X-ray selected groups and clusters drawn from ∼6 deg2 of the XMM-Newton Blanco Cosmology Survey. These systems extend to redshift z = 1.02 and probe the SZE signal to the lowest X-ray luminosities…