Search Publications
Non-self-similar scaling of plasma sheet and solar wind probability distribution functions of magnetic field fluctuations
Balogh, A.; Khurana, K. K.; Kistler, L. M. +5 more
Solar wind magnetometer and plasma data and magnetometer data acquired by Cluster in the magnetospheric plasma sheet are employed to construct probability distribution functions (PDFs) of magnetic field fluctuations over various temporal and spatial scales. This technique, often used in analysis of laboratory plasmas, is used to look for intermitt…
Adaptive-Optics-Assisted Near-Infrared Spectroscopy of SVS 13 and Its Jet
Smith, M. D.; Ray, T. P.; Nisini, B. +5 more
We present long-slit H- and K-band spectroscopy of the low-mass outflow source SVS 13, obtained with the adaptive-optics-assisted imager-spectrometer NACO on the VLT. With a spatial resolution of <0.25" and a pixel scale of 0.027", we precisely establish the relative offsets of H2, [Fe II], CO, H I, and Na I components from the sourc…
The Brave New World of Binary Star Studies
Guinan, Edward F.; Engle, Scott G.
In this paper we discuss some of the new and exciting developments in the study of binary stars. Recent technological advances (such as CCDs) now make it possible (even easy) to study faint, astrophysically important binaries that in the past could only be done with large 4 + meter class telescopes. Also, the panoramic nature of CCDs (and the use …
INTEGRAL high energy behaviour of 4U 1812-12
Götz, D.; Capitanio, F.; Bird, A. J. +5 more
The low mass X-ray binary system 4U 1812-12 was monitored with the INTEGRAL observatory in the period 2003-2004 and with BeppoSAX on April 20, 2000. We report here on the spectral and temporal analysis of both persistent and burst emission. The full data set confirms the persistent nature of this burster, and reveals the presence of emission up to…
Statistical characteristics of hydrogen and oxygen ENA emission from the storm-time ring current
Mitchell, D. G.; Roelof, E. C.; Brandt, P. C. +2 more
The present study statistically examines energetic neutral atom (ENA) emission from the storm-time inner magnetosphere using measurements from the IMAGE/HENA instrument. It is found that the total image-integrated ENA energy flux is well correlated (∣c.c.∣ ∼ 0.7) with the Sym-H index. However, the increase is not linear but exponential with ∣Sym-H…
Host Galaxies of Two Micron All Sky Survey-selected QSOs at Redshift over 0.3
Hutchings, J. B.; Cutri, R. M.; Cherniawsky, A. +1 more
We have obtained optical imaging with the Canada-France-Hawaii Telescope (CFHT) of 21 2MASS-selected QSOs of redshift greater than 0.3. This paper complements the sample of lower redshift 2MASS QSOs previously published. The QSOs have higher overall and nuclear luminosity, bluer colors, and higher ratio of nuclear to host flux than the lower redsh…
The messy environment of Mrk 6
Schurch, N. J.; Warwick, R. S.; Griffiths, R. E.
In recent years it has become clear that understanding the absorption present in active galactic nuclei (AGN) is essential given its bearing on unification models. We present the most recent XMM-Newton observation of Mrk 6, with the goal of understanding the nature and origin of the complex absorption intrinsic to this source. X-ray spectral fitti…
Cluster observations in the magnetosheath - Part 2: Intensity of the turbulence at electron scales
Maksimovic, M.; Trávníček, P.; Cornilleau-Wehrlin, N. +5 more
The Cluster STAFF Spectral Analyser measures the magnetic and electric power spectral densities (PSD) δB2 and δE2 in the magnetosheath between 8 Hz and 4 kHz, i.e. between about the lower hybrid frequency and 10 times the proton plasma frequency. We study about 23 h of data on four different days. We do not consider the whist…
An Atlas of Hubble Space Telescope STIS Spectra of Seyfert Galaxies
Calzetti, D.; Storchi-Bergmann, T.; Brandt, C. H. +1 more
We present a compilation of spectra of 101 Seyfert galaxies obtained with the Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS), covering the UV and/or optical spectral range. Information on all the available spectra have been collected in a Mastertable, which is a very useful tool for anyone interested in a quick glance at …
Kinematics of O-B5 giants
Branham, Richard L.
To study the kinematics of O-B5 giant stars (luminosity class III), 290 non-Gould belt stars with proper motions taken from the Hipparcos catalogue are used, of which 107 have radial velocities taken from other sources. Semidefinite programming solves for the kinematical parameters and the coefficients of the velocity ellipsoid. The condition that…