Search Publications
Discovery of an exceptionally bright giant arc at z = 2.369, gravitationally lensed by the Planck cluster PSZ1 G311.65-18.48
Kneissl, R.; Dahle, H.; Aghanim, N. +14 more
As part of an all-sky follow-up of the Planck catalogue of Sunyaev-Zeldovich (SZ) cluster candidates detected in the first 14 months of data, we are observing cluster candidates in the southern sky in the optical imaging and spectroscopy through an ESO Large Programme. Inspection of ESO New Technology Telescope (NTT) R-and z-band imaging data from…
Observational Signatures of Coronal Loop Heating and Cooling Driven by Footpoint Shuffling
Velli, M.; Warren, H. P.; Ugarte-Urra, I. +4 more
The evolution of a coronal loop is studied by means of numerical simulations of the fully compressible three-dimensional magnetohydrodynamic equations using the HYPERION code. The footpoints of the loop magnetic field are advected by random motions. As a consequence, the magnetic field in the loop is energized and develops turbulent nonlinear dyna…
CMB lensing beyond the power spectrum: Cosmological constraints from the one-point probability distribution function and peak counts
Sherwin, Blake D.; Hill, J. Colin; Haiman, Zoltán +3 more
Unprecedentedly precise cosmic microwave background (CMB) data are expected from ongoing and near-future CMB stage III and IV surveys, which will yield reconstructed CMB lensing maps with effective resolution approaching several arcminutes. The small-scale CMB lensing fluctuations receive non-negligible contributions from nonlinear structure in th…
Dust emissivity in the star-forming filament OMC 2/3
Di Francesco, J.; Sadavoy, S. I.; Stutz, A. M. +3 more
We present new measurements of the dust emissivity index, β, for the high-mass, star-forming OMC 2/3 filament. We combined 160-500 µm data from Herschel with long-wavelength observations at 2 mm and fit the spectral energy distributions across a ≃2 pc long, continuous section of OMC 2/3 at 15 000 AU (0.08 pc) resolution. With these data, we …
Turbulence Heating ObserveR - satellite mission proposal
Escoubet, C. P.; Vainio, R.; Eastwood, J. P. +44 more
The Universe is permeated by hot, turbulent, magnetized plasmas. Turbulent plasma is a major constituent of active galactic nuclei, supernova remnants, the intergalactic and interstellar medium, the solar corona, the solar wind and the Earth's magnetosphere, just to mention a few examples. Energy dissipation of turbulent fluctuations plays a key r…
The Carina Nebula and Gum 31 molecular complex - I. Molecular gas distribution, column densities, and dust temperatures
Elia, Davide; Molinari, Sergio; Burton, Michael +6 more
We report high-resolution observations of the 12CO(1-0) and 13CO(1-0) molecular lines in the Carina Nebula and the Gum 31 region obtained with the 22-m Mopra telescope as part of The Mopra Southern Galactic Plane CO Survey. We cover 8 deg2 from l = 285° to 290°, and from b = -1.5° to +0.5°. The molecular gas column…
µ distortions or running: A guaranteed discovery from CMB spectrometry
Melchiorri, Alessandro; Cabass, Giovanni; Pajer, Enrico
We discuss the implications of a PIXIE-like experiment, which would measure µ -type spectral distortions of the cosmic microwave background (CMB) at a level of σµ=(1 /n )×10-8 , with n ≥1 representing an improved sensitivity (e.g. n =10 corresponds to PRISM). Using Planck data and considering the six-parameter Λ C…
Discrete sources of cryovolcanism on the nucleus of Comet 29P/Schwassmann-Wachmann and their origin
Miles, Richard
Evidence for long-lived sources of cryovolcanism on the nucleus of the Comet 29P/Schwassmann-Wachmann has been found from a study of its times of outburst (t0) and the morphological development of inner coma structures. Analysis of data from the Minor Planet Center observations archive spanning 2002-2014 and other observations have yiel…
Ultra-deep K S-band Imaging of the Hubble Frontier Fields
Fontana, Adriano; Muzzin, Adam; Labbé, Ivo +16 more
We present an overview of the “KIFF” project, which provides ultra-deep K s -band imaging of all six of the Hubble Frontier Fields clusters, Abell 2744, MACS-0416, Abell S1063, Abell 370, MACS-0717, and MACS-1149. All of these fields have recently been observed with large allocations of Directors’ Discretionary Time with the Hubble and…
Characteristics of north jovian aurora from STIS FUV spectral images
Bonfond, B.; Nichols, J. D.; Ray, L. C. +4 more
We analyzed two observations obtained in Jan. 2013, consisting of spatial scans of the jovian north ultraviolet aurora with the HST Space Telescope Imaging Spectrograph (STIS) in the spectroscopic mode. The color ratio (CR) method, which relates the wavelength-dependent absorption of the FUV spectra to the mean energy of the precipitating electron…