Search Publications
The spectrum of HD46223
Zagury, Frédéric
The spectrum of HD46223 was established from the optical to the far UV and normalized by the spectrum of a non-reddened star of same spectral type. The resulting spectrum is separated into two components. One is the direct starlight. The second is an additional component of light scattered at small angles. In the optical the spectrum is dominated …
Cassini plasma spectrometer electron spectrometer measurements during the Earth swing-by on August 18, 1999
Coates, A. J.; Linder, D. R.; Thomsen, M. +5 more
On August 18, 1999, Cassini flew by the Earth on its way to Saturn. The Cassini Earth swing-by was the fastest traversal of the Earth's magnetosphere to date. The spacecraft was traveling at 9.1REhr-1 (16.1 km s-1) and made rapid traversals of several regions of the terrestrial magnetosphere. During the Cassini Ear…
Ultraviolet Observations of Triton in 1999 with the Space Telescope Imaging Spectrograph: 2150-3180 Å Spectroscopy and Disk-integrated Photometry
Stern, S. Alan; Young, Leslie A.
We observed Triton using the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope (HST) on 1999 August 28, September 11, and September 13 UT. On all three occasions, we obtained images at both 271 and 374 nm, and spectra from 215 to 318 nm. We find that Triton's geometric albedo is high through the near- and mid-UV, decreasing…
Extent of Excess Far-Infrared Emission around Luminosity Class III Stars
Zuckerman, B.; Kim, Sungsoo S.; Silverstone, Murray
With the Infrared Space Observatory, we conducted 3×3 pixel imaging photometry of 12 luminosity class III stars, which were previously presumed to have dust particles around them, at far-infrared wavelengths (60 and 90 µm). Eleven out of 12 targets show a peak of excess (above photosphere) far-infrared emission at the location of the star, i…
Period-Luminosity-Colour distribution and classification of galactic oxygen-rich LPVs II. Confrontation with pulsation models
Luri, X.; Barthès, D.
The kinematic and Period-Luminosity-Colour distribution of O-rich Long-Period Variable (LPV) stars of the solar neighbourhood is interpreted in terms of pulsation modes, masses and metallicities. It is first shown that, because of input physics imperfections, the periods and mean colours derived from the existing linear and nonlinear nonadiabatic …
Investigation of the Magellanic eclipsing binary HV 2241
Morrell, N. I.; Ostrov, P. G.; Lapasset, E.
We present a CCD V light curve of
The Galactic Evolution of Beryllium and Boron Revisited
King, Jeremy R.
The largest, highest-quality, and most near-homogeneously treated extant available samples of Be, B, Fe, and O abundances are analyzed on four different stellar parameter scales, considering different O abundance indicators and deriving uncertainties in their relation with the required aid of jackknife and bootstrap simulations/resampling. Despite…
The zeta Herculis binary system revisited. Calibration and seismology
Provost, J.; Berthomieu, G.; Morel, P. +1 more
We have revisited the calibration of the visual binary system zeta Herculis with the goal to give the seismological properties of the G0 IV sub-giant zeta Her A. The sum of masses and the mass fraction are derived from the most recent astrometric data mostly based on the HIPPARCOS ones. We have derived the effective temperatures, the luminosities …
Energetic Particle Characteristics in the High-Latitude Heliosphere Near Solar Maximum
Simnett, G. M.
This review is focused on the energetic particle observations made from the Ulysses spacecraft during the period it spent at high latitudes above the streamer belt in 1999/2000. The relativistic electron intensity has exhibited a significant number of impulsive increases, which are attributed to solar flares, up to latitudes of S80° degrees. These…
A peculiar metal-rich star, HD 135485
Dufton, P. L.; Lennon, D. J.; Ryans, R. S. I. +3 more
Local thermodynamic equilibrium (LTE) absolute and differential abundances are presented for a peculiar metal-rich B-type star, HD 135485. These suggest that HD 135485 has a general enrichment of ~0.5dex in all the metals observed (C, N, O, Ne, Mg, Al, Si, P, S, Cl, Ar, Sc, Ti, Cr, Mn, Fe and Sr), except for nickel. The helium enhancement and henc…