Search Publications
On the Constancy of the Electron Temperature in the Expanding Corona Throughout Solar Cycle 23
Morgan, Huw; Habbal, Shadia Rifai; Druckmüller, Miloslav +1 more
A recent analysis of Fe emission lines observed during the total solar eclipses of 2006 March 29 and 2008 August 1 established the first empirical link between the electron temperature in the expanding corona and Fe charge states measured in interplanetary space. In this Letter, we use this link to infer this temperature throughout solar cycle 23 …
AKARI Near- to Mid-Infrared Imaging and Spectroscopic Observations of the Small Magellanic Cloud. I Bright Point Source List
Onaka, Takashi; Yamamura, Issei; Matsunaga, Noriyuki +9 more
We carried out near- to mid-infrared imaging and spectroscopic observations of patchy areas in the Small Magellanic Cloud using the Infrared Camera aboard AKARI. Two 100 arcmin² areas were imaged in 3.2, 4.1, 7, 11, 15, and 24µm, and also spectroscopically observed in the wavelength range continuously from 2.5 to 13.4µm. The spectral r…
The HARPS search for southern extra-solar planets. XX. Planets around the active star BD -08°2823
Bouchy, F.; Moutou, C.; Queloz, D. +13 more
We report the detection of a planetary system around BD -08°2823 that includes at least one Uranus-mass planet and one Saturn-mass planet. This discovery serendipitously originates from a search for planetary transits in the Hipparcos photometry database. This program preferentially selected active stars and did not allow the detection of new tran…
High-Resolution X-ray Spectra of the Symbiotic Star SS73 17
Luna, G. J. M.; Smith, R. K.; Eze, R. N. C.
SS73 17 was an innocuous Mira-type symbiotic star until the International Gamma-Ray Astrophysics Laboratory and Swift discovered its bright hard X-ray emission, adding it to the small class of "hard X-ray emitting symbiotics." Suzaku observations in 2006 then showed it emits three bright iron lines as well, with little to no emission in the 0.3-2.…
Swift Study of the First Soft γ-ray Repeater Like Burst from AXP 1E 1841-045 in SNR Kes 73
Safi-Harb, Samar; Kumar, Harsha S.
We report the study of the short (32 ms) and first soft γ-ray repeater like burst observed from the anomalous X-ray pulsar (AXP) 1E 1841-045 associated with the supernova remnant Kes 73, discovered on 2010 May 6 by the Burst Alert Telescope on board the Swift γ-ray observatory. The 15-100 keV time-averaged burst spectrum is modeled by a single pow…
Web-Based Data Processing System for Automated Detection of Oscillations with Applications to the Solar Atmosphere
Nakariakov, V. M.; Ofman, L.; Anfinogentov, S. A. +1 more
A web-based, interactive system for the remote processing of imaging data sets (i.e., EUV, X-ray, and microwave) and the automated interactive detection of wave and oscillatory phenomena in the solar atmosphere is presented. The system targets localized, but spatially resolved, phenomena such as kink, sausage, and longitudinal propagating and stan…
A Multiphase Suzaku Study of X-rays from τ Sco
Donati, J. -F.; Oskinova, L. M.; Ignace, R. +5 more
We obtained relatively high signal-to-noise X-ray spectral data of the early massive star τ Sco (B0.2V) with the Suzaku X-ray Imaging Spectrometer (XIS) instrument. This source displays several unusual features that motivated our study: (1) redshifted absorption in UV P Cygni lines to approximately +250 km s-1 suggestive of infalling ga…
The shape and dynamics of a heliotropic dusty ringlet in the Cassini Division
Hedman, M. M.; Burns, J. A.; Tiscareno, M. S. +1 more
The so-called "Charming Ringlet" (R/2006 S3) is a low-optical-depth, dusty ringlet located in the Laplace gap in the Cassini Division, roughly 119,940 km from Saturn center. This ringlet is particularly interesting because its radial position varies systematically with longitude relative to the Sun in such a way that the ringlet's geometric center…
Migration of a Moonlet in a Ring of Solid Particles: Theory and Application to Saturn's Propellers
Charnoz, Sébastien; Crida, Aurélien; Salmon, Julien +2 more
Hundred-meter-sized objects have been identified by the Cassini spacecraft in Saturn's A ring through the so-called propeller features they create in the ring. These moonlets should migrate due to their gravitational interaction with the ring; in fact, some orbital variations have been detected. The standard theory of type I migration of planets i…
Automatic Detection of Limb Prominences in 304 Å EUV Images
Dalla, S.; Marshall, S.; Labrosse, N.
A new algorithm for automatic detection of prominences on the solar limb in 304 Å EUV images is presented, and results of its application to SOHO/EIT data discussed. The detection is based on the method of moments combined with a classifier analysis aimed at discriminating between limb prominences, active regions, and the quiet corona. This classi…