Search Publications
Midnight sector observations of auroral omega bands
Lucek, E.; Wild, J. A.; Woodfield, E. E. +14 more
We present observations of auroral omega bands on 28 September 2009. Although generally associated with the substorm recovery phase and typically observed in the morning sector, the features presented here occurred just after expansion phase onset and were observed in the midnight sector, dawnward of the onset region. An all-sky imager located in …
Optical and infrared properties of active galactic nuclei in the Lockman Hole
Burwitz, V.; Salvato, M.; Rovilos, E. +4 more
We present the observed-frame optical, near-, and mid-infrared properties of X-ray-selected active galactic nuclei (AGN) in the Lockman Hole. Using a likelihood ratio method on optical, near-infrared or mid-infrared catalogues, we assigned counterparts to 401 out of the 409 X-ray sources of the XMM-Newton catalogue. Accurate photometry was collect…
The proton pressure tensor as a new proxy of the proton decoupling region in collisionless magnetic reconnection
Lavraud, B.; Belmont, G.; Vaivads, A. +3 more
Cluster data is analyzed to test the proton pressure tensor variations as a proxy of the proton decoupling region in collisionless magnetic reconnection. The Hall electric potential well created in the proton decoupling region results in bounce trajectories of the protons which appears as a characteristic variation of one of the in-plane off-diago…
Modelling solar irradiance variability on time scales from minutes to months
Solanki, S. K.; Krivova, N. A.; Seleznyov, A. D.
We analyze and model total solar irradiance variability on time scales from minutes to months, excluding variations due to p-mode oscillations, using a combination of convective and magnetic components. These include granulation, the magnetic network, faculae and sunspots. Analysis of VIRGO data shows that on periods of a day or longer solar varia…
MOIRCS Deep Survey. X. Evolution of Quiescent Galaxies as a Function of Stellar Mass at 0.5 < z < 2.5
Tanaka, Ichi; Yamada, Toru; Kajisawa, Masaru +4 more
We studied the evolution of quiescent galaxies at 0.5 < z < 2.5 as a function of the stellar mass, using very deep NIR imaging data from the MOIRCS Deep Survey in the GOODS-North region. The deep NIR data allowed us to construct a stellar mass-limited sample of quiescent galaxies down to ∼1010Modot, even at z ∼ 2, for t…
Modeling of Cassini's charging at Saturn orbit insertion flyby
Yaroshenko, V. V.; Miloch, W. J.; Thomas, H. M. +2 more
Spacecraft-plasma interactions are studied in the regime relevant for Cassini during the Saturn orbit insertion (SOI) flyby. Three-dimensional particle-in-cell self-consistent code has been employed to calculate the spacecraft potential in a complicated plasma environment of Saturn's magnetosphere for a wide range of distances (for dipole shells b…
Far-infrared luminosity function of local star-forming galaxies in the AKARI Deep Field-South
Goto, Tomotsugu; Clements, D. L.; Shirahata, Mai +8 more
We present a far-infrared galaxy luminosity function for the local universe. We have obtained 389 spectroscopic redshifts for galaxies observed at 90 µm in the AKARI Deep Field-South, using the AAOmega fibre spectrograph via optical identifications in the digitized sky survey and 4-m class optical imaging. For the luminosity function present…
On the Extended Emission around the Anomalous X-Ray Pulsar 1E 1547.0-5408
Ng, C. -Y.; Zhu, W. W.; Kaspi, V. M. +4 more
We present an analysis of the extended emission around the anomalous X-ray pulsar 1E 1547.0-5408 using four XMM-Newton observations taken with the source in varying states of outburst as well as in quiescence. We find that the extended emission flux is highly variable and strongly correlated with the flux of the magnetar. Based on this result, as …
[O II] emitters in the GOODS field at z∼ 1.85: a homogeneous measure of evolving star formation
Ryan-Weber, E. V.; McMahon, R. G.; Venemans, B. P. +2 more
We present the results of a deep, near-infrared, narrow-band imaging survey at a central wavelength of 1.062 µm (FWHM = 0.01 µm) in the GOODS-South field using the ESO VLT instrument, HAWK-I. The data are used to carry out the highest redshift search for [O II] λ3727 Å emission line galaxies to date. The images reach an emission line f…
Energy conversion at the Earth's magnetopause using single and multispacecraft methods
Dandouras, I.; Lucek, E.; Haaland, S. E. +3 more
We present a small statistical data set, where we investigate energy conversion at the magnetopause using Cluster measurements of magnetopause crossings. The Cluster observations of magnetic field, plasma velocity, current density and magnetopause orientation are needed to infer the energy conversion at the magnetopause. These parameters can be in…