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Spectrophotometry of speckle binary stars III

Al-Wardat, M. A.

Spectrophotometric observations of a third set consisting of 11 stars of speckle interferometric binaries are presented. Observations covered the range 3700-8400 Å, with a resolution of 18 Å. Results are presented in the form of the measured flux corrected for atmospheric extinction in the units of erg/cm²\cdot s \cdot Å, with no correc…

Two new optical jets in B2 radio galaxies

Bondi, M.; Capetti, A.; Morganti, R. +5 more

We present HST observations of previously undetected optical jets in the low-luminosity radio galaxies B2 0755+37 and B2 1553+24. We show that there is accurate spatial coincidence between optical and radio emission, implying that the former is likely to be synchrotron radiation. The physical properties of the jets are similar to those known previ…

Telescopic and Microscopic views of the magnetosphere: Multispacecraft observations

Baker, D. N.

The magnetospheric research community has long sought the capability to view the Sun-Earth system in a global way and to probe concurrently the microphysical details of key physical regions. This objective has now been substantially realized with the combination of the CLUSTER and IMAGE missions. With the additional use of SOHO, ACE, FAST, SAMPEX,…

Chandra X-Ray Observations of Early Type Galaxies

KIM, DONG-WOO

Energetic H/He intensity ratio under solar maximum and solar minimum conditions: Ulysses observations

Lario, D.; Roelof, E. C.; Maclennan, C. G. +3 more

We study the solar cycle variability of the heliospheric energetic proton-to-helium abundance ratios. We use 0.5-1.0 MeV nucleon ^-1 proton and helium intensities observed by the Ulysses spacecraft at both high and low heliographic latitudes. Ulysses observations show that during solar maximum the 0.5-1.0 MeV nucleon ^-1H/He in…

Near infrared photometry for 20 Hipparcos carbon stars

Chen, P. S.; Yan, X. H.; Wang, X. H.

The near infrared photometry in the JHK bands is made for 20 Hipparcos carbon stars. From the results of the near infrared photometry, the bolometric corrections in the K band, the apparent bolometric magnitudes and the effective temperatures can be estimated. Combined with the trigonometric parallaxes observed with the Hipparcos satellite, the ab…

Solar Cycle Variation in GONG and MDI Data : 1995-2002

Tripathy, S. C.

Both GONG and MDI projects have measured p-mode frequencies of the Sun for more than 7 years. Here we review what we have learnt from the temporal variation of the oscillation frequencie and splitting coefficients.

Does the ion cyclotron exist in the inner corona?

Raouafi, N. -E.

The present work is about the interpretation of the linear polarization of the O {vi} D_2 (lambda1032 ) coronal line observed by SUMER/SoHO. We take into account the effect of the Doppler redistribution due to the scattering ions motion. We consider the cases of isotropic and anisotropic velocity field distributions. The latter can be interpreted …

Observation and simulation of flux rope structures at the dayside magnetopause

Balogh, A.; Liu, Zhenxing; Cui, Hailong +2 more

The signatures of flux ropes with obvious core magnetic field are detected by Cluster II at the dayside magnetopause during 11: 00-11: 15 UT on Mar. 2, 2001. The similar characteristics can be found from the magnetic field variations recorded by the four spacecrafts (Cluster II C1-C4). All the three (-/+) bipolar signatures in the BN com-ponent ar…