Search Publications
The JCMT Gould Belt Survey: evidence for radiative heating in Serpens MWC 297 and its influence on local star formation
Stapelfeldt, K. R.; White, G. J.; Wilson, C. D. +61 more
We present SCUBA-2 450 and 850 µm observations of the Serpens MWC 297 region, part of the James Clerk Maxwell Telescope (JCMT) Gould Belt Survey of nearby star-forming regions. Simulations suggest that radiative feedback influences the star formation process and we investigate observational evidence for this by constructing temperature maps.…
CMB power spectrum of Nambu-Goto cosmic strings
Shellard, E. P. S.; Landriau, Martin; Lazanu, Andrei
We improve predictions of the cosmic microwave background (CMB) power spectrum induced by cosmic strings by using source terms obtained from Nambu-Goto network simulations in an expanding universe. We use three high-resolution cosmic string simulations that cover the entire period from recombination until late-time Λ domination to calculate unequa…
Saturn´s Inner Satellites: Orbits, Masses, and the Chaotic Motion of Atlas from New Cassini Imaging Observations
Cooper, N. J.; Murray, C. D.; Evans, M. W. +1 more
We present numerically derived orbits and mass estimates for the inner Saturnian satellites, Atlas, Prometheus, Pandora, Janus, and Epimetheus from a fit to 2580 new Cassini Imaging Science Subsystem astrometric observations spanning 2004 February to 2013 August. The observations are provided as machine-readable and Virtual Observatory tables. We …
Imaging and Spectroscopic Observations of a Transient Coronal Loop: Evidence for the Non-Maxwellian K Distributions
Del Zanna, Giulio; Dudík, Jaroslav; Dzifčáková, Elena +8 more
We report on the Solar Dynamics Observatory/Atmospheric Imaging Assembly (AIA) and Hinode/EUV Imaging Spectrograph (EIS) observations of a transient coronal loop. The loop brightens up in the same location after the disappearance of an arcade formed during a B8.9-class microflare 3 hr earlier. EIS captures this loop during its brightening phase, a…
Seasonal variation of the HDO/H2O ratio in the atmosphere of Mars at the middle of northern spring and beginning of northern summer
Aoki, Shohei; Kasaba, Yasumasa; Sagawa, Hideo +4 more
We present the seasonal variation of the HDO/H2O ratio caused by sublimation-condensation processes in a global view of the martian water cycle. The HDO/H2O ratio was retrieved from ground-based observations using high-dispersion echelle spectroscopy of the Infrared Camera and Spectrograph (IRCS) of the Subaru telescope. Coor…
Water vapor near Venus cloud tops from VIRTIS-H/Venus express observations 2006-2011
Drossart, P.; Piccioni, G.; Ignatiev, N. I. +1 more
This work aims to give a summary of the water vapor at the cloud top of Venus atmosphere using the complete set of observations made using high spectral resolution channel (-H) of Visible and Infrared Thermal Imaging Spectrometer (VIRTIS), on board the ESA Venus Express orbiter, to measure the cloud top altitude and the water vapor abundance near …
Observation of charged nanograins at comet 67P/Churyumov-Gerasimenko
Goldstein, R.; Mokashi, P.; Gombosi, T. I. +2 more
Soon after the Rosetta Orbiter rendezvoused with comet 67P/Churyumov-Gerasimenko at a solar distance of ~3.5 AU and began to fly in triangular-shaped trajectories around it, the Ion and Electron Sensor detected negative particles at energies from about 100 eV/q to over 18 keV/q. The lower energy particles came from roughly the direction of the com…
A new parameterization of the reionisation history
Aghanim, N.; Douspis, M.; Ilić, S. +1 more
Motivated by the current constraints on the epoch of reionisation from recent cosmic microwave background observations, ionising background measurements of star-forming galaxies, and low redshifts line-of-sight probes, we propose a new data-motivated parameterisation of the history of the average ionisation fraction. This parameterisation describe…
HSIM: a simulation pipeline for the HARMONI integral field spectrograph on the European ELT
Swinbank, A. M.; Fusco, T.; Kendrew, S. +5 more
We present HSIM: a dedicated pipeline for simulating observations with the High Angular Resolution Monolithic Optical and Near-infrared Integral field spectrograph (HARMONI) on the European Extremely Large Telescope. HSIM takes high spectral and spatial resolution input data cubes, encoding physical descriptions of astrophysical sources, and gener…
Broadband X-Ray Properties of the Gamma-Ray Binary 1FGL J1018.6-5856
An, Hongjun; Hailey, Charles J.; Kaspi, Victoria M. +11 more
We report on NuSTAR, XMM-Newton, and Swift observations of the gamma-ray binary 1FGL J1018.6-5856. We measure the orbital period to be 16.544 ± 0.008 days using Swift data spanning 1900 days. The orbital period is different from the 2011 gamma-ray measurement which was used in the previous X-ray study of An et al. using ∼400 days of Swift data, bu…