Search Publications
The rotation of the plasmapause-like boundary at high latitudes in Saturn's magnetosphere and its relation to the eccentric rotation of the northern and southern auroral ovals
Gurnett, D. A.; Persoon, A. M.; Kurth, W. S. +4 more
Here we present a study of the rotation of the plasmapause-like density boundary discovered by the Cassini spacecraft at high latitudes in the Saturnian magnetosphere, and compare the results with previously published studies of high-latitude magnetic field perturbations and the eccentric rotation of the auroral ovals. Near the planet the density …
Sample of LMXBs in the Galactic bulge - I. Optical and near-infrared constraints from the Virtual Observatory
Zolotukhin, Ivan Yu.; Revnivtsev, Mikhail G.
We report on the archival optical and near-infrared observations of six low-mass X-ray binaries situated in the Galactic bulge. We process several recent Chandra and XMM-Newton as well as Einstein data sets of binary systems suspected to be ultracompact, which give us arcsec-scale positional uncertainty estimates. We then undertake a comprehensive…
Cryogenic Volume-Phase Holographic Grisms for MOIRCS
Shimasaku, Kazuhiro; Tanaka, Ichi; Yamada, Toru +12 more
We have developed high-dispersion VPH (volume phase holographic) grisms with zinc selenide (ZnSe) prisms for the cryogenic optical system of MOIRCS (Multi-Object near-InfraRed Camera and Spectrograph) for Y-, J-, H-, and K-band observations. We fabricated VPH gratings using a hologram resin. After several heat cycles at between room temperature an…
Observations of Plasma Blob Ejection from a Quiescent Prominence by Hinode Solar Optical Telescope
Isobe, Hiroaki; Watanabe, Hiroko; Hillier, Andrew
We report findings from 0''.2 resolution observations of the 2007 October 03 quiescent prominence observed with the Solar Optical Telescope on the Hinode satellite. The observations show clear ejections from the top of the quiescent prominence of plasma blobs. The ejections, originating from the top of prominence threads, are impulsively accelerat…
A Deep Chandra View of the NGC 404 Central Engine
Dalcanton, J. J.; Skillman, E. D.; Weisz, D. R. +7 more
We present the results of a 100 ks Chandra observation of the NGC 404 nuclear region. The long exposure and excellent spatial resolution of Chandra have enabled us to critically examine the nuclear environment of NGC 404, which is known to host a nuclear star cluster and potentially an intermediate-mass black hole (IMBH; on the order of a few time…
Multi-fluid Model of a Streamer at Solar Minimum and Comparison with Observations
Giordano, Silvio; Ofman, Leon; Abbo, Lucia
We present the results of a time-dependent 2.5-dimensional three-fluid magnetohydrodynamic model of the coronal streamer belt, which is compared with the slow solar wind plasma parameters obtained in the extended corona by the UV spectroscopic data from the Ultraviolet Coronagraph Spectrometer (UVCS) on board SOHO during the past minimum of solar …
XMM-Newton and INTEGRAL observations of the very faint X-ray transient IGR J17285-2922/XTE J1728-295 during the 2010 outburst
Götz, D.; Mereghetti, S.; Sidoli, L. +2 more
We report the first broad-band (0.5-150 keV) simultaneous X-ray observations of the very faint X-ray transient IGR J17285-2922/XTE J1728-295 performed with the XMM-Newton and INTEGRAL satellites during its last outburst, started on 2010 August 28. XMM-Newton observed the source on 2010 September 9-10 for 22 ks. INTEGRAL observations were part of t…
Far-infrared constraints on the contamination by dust-obscured galaxies of high-z dropout searches
Smail, I.; Kneib, J. -P.; Magnelli, B. +23 more
The spectral energy distributions (SED) of dusty galaxies at intermediate redshift may look similar to very high-redshift galaxies in the optical/near infrared (NIR) domain. This can lead to the contamination of high-redshift galaxy searches based on broad-band optical/NIR photometry by lower redshift dusty galaxies because both kind of galaxies c…
Structure and Dynamics of the 2009 July 22 Eclipse White-light Corona
Rušin, V.; Saniga, M.; Pasachoff, J. M. +2 more
The white-light corona (WLC) during the total solar eclipse of 2009 July 22 was observed by several teams in the Moon's shadow stretching from India and China across the Pacific Ocean with its many isolated islands. We present a comparison of the WLC as observed by eclipse teams located in China (Shanghai region) and on the Enewetak Atoll in the M…
Electron dynamics in collisionless magnetic reconnection
Wang, Shui; Huang, Can; Lu, San +3 more
Magnetic reconnection provides a physical mechanism for fast energy conversion from magnetic energy to plasma kinetic energy. It is closely associated with many explosive phenomena in space plasma, usually collisionless in character. For this reason, researchers have become more interested in collisionless magnetic reconnection. In this paper, the…