Search Publications
SX Phoenicis Stars in the Globular Cluster M 92
Kopacki, G.
We present results of a search for SX Phe stars in the globular cluster M 92. In photometric reductions, we used the image subtraction method supplemented with a procedure of searching for short-period variables, based on the examination of each pixel in the CCD frame. In addition to two SX Phe stars already known in the cluster, we have found fiv…
Plasma sheet stretching accompanied by field aligned energetic ion fluxes observed by the NUADU instrument aboard TC-2
Barabash, S.; Zhang, T. L.; Carr, C. M. +6 more
The NUADU (NeUtral Atom Detector Unit) instrument aboard TC-2 recorded 4л solid angle images of charged particles (E >180 keV) spiraling around the magnetic field lines in the near-Earth plasma sheet (at -7 RE, equatorial dawn-to-night side) during a geomagnetic storm (Dst =-219 nT) on August 24, 2005. Energetic ion beam events characterized b…
Detection of an Hα Emission Line on a Quasar, RX J1759.4+6638, at z = 4.3 with AKARI
Ohyama, Y.; Takagi, T.; Matsuhara, H. +18 more
We report on the detection of an Hα) is consistent with those of previous reports for lower-redshift quasars.
Kinematic segregation of nearby disk stars from the Hipparcos database
Teixeira, R.; de Souza, R. E.
Aims:To better understand our Galaxy, we investigate the pertinency of describing the system of nearby disk stars in terms of a two-component Schwarzschild velocity distribution.Using the proper motion and parallax information of Hipparcos database, we determine the parameters characterizing the local stellar velocity field of a sample of 22 000 d…
Planetary science: Titan's lost seas found
Sotin, Christophe
When the Cassini spacecraft found no methane ocean swathing Saturn's moon Titan, it was a blow to proponents of an Earth-like world. The discovery of northern lakes on Titan gives them reason for cheer.
On understanding the meaning of l = 2 and 3 p-mode frequencies as measured by various helioseismic instruments
Chaplin, W. J.; Appourchaux, T.
Aims:Frequencies of the low-degree p-mode oscillations of the Sun may be extracted either from data collected by instruments that make full-disc observations of the Sun as a star, or from data collected by instruments that resolve, or image, the Sun's surface onto many detector elements. The two methods can show marked differences in their sensiti…
The Unusual Variability of the Large Magellanic Cloud Planetary Nebula RPJ 053059-683542
Rest, Armin; Parker, Quentin A.; Smith, R. Chris +3 more
We present images and light curves of the bipolar planetary nebula RPJ 053059-683542 that was discovered in the Reid-Parker AAO UKST Hα survey of the Large Magellanic Cloud. The emission from this object appears entirely nebular, with the central star apparently obscured by a central band of absorption that bisects the nebula. The light curves, wh…
Development of a modular CdTe detector plane for gamma-ray burst detection below 100 keV
Barret, D.; Ehanno, M.; Amoros, C. +8 more
We report on the development of an innovative CdTe detector plane (DPIX) optimized for the detection and localization of gamma-ray bursts in the X-ray band (below 100 keV). DPIX is part of an R&D program funded by the French Space Agency (CNES). DPIX builds upon the heritage of the ISGRI instrument, currently operating with great success on th…
An Ultraviolet Spectral Atlas of VV Cephei during Total Eclipse
Bennett, Philip D.; Brown, Alexander; Bauer, Wendy Hagen
The first observations of the ultraviolet spectrum of the binary system VV Cep (M2 Iab+B?) during total eclipse have been made with the HST. A rich emission-line spectrum is seen, with over two thousand emission features present. Shortward of 1600 Å, a weak continuum presumably due to Rayleigh scattering of the hot component is present, strengthen…
The double-lined spectroscopic binary HR 6046
Griffin, R. E. M.; Scarfe, C. D.; Griffin, R. F.
HR 6046 has long been known as a single-lined binary system, for which preliminary orbital solutions were given in the 1930s, but the nature of the secondary star in the system has to date appeared puzzling. The rather large masses which the component stars were once believed to possess caused much speculation that the secondary was a `collapsed s…