Science Archives Publication System

Space Weather Effects on Technology

DOI: 10.1007/978-3-540-31534-6_8 Bibcode: 2004LNP...656..241V

Valtonen, Eino

Space weather effects on technology are discussed. After a brief general overview of the consequences of space weather on various technologies and a summary of the space environment, the effects of plasmas and particle radiation on systems in space are considered in more detail. The processes responsible for spacecraft surface charging and interna…

2004 • Lecture Notes in Physics, Berlin Springer Verlag

SOHO 4

Observational studies of Cataclysmic Variable evolution: Of samples, biases and surprises

DOI: 10.48550/arXiv.astro-ph/0402125 Bibcode: 2004RMxAC..20..152G

Gänsicke, B. T.

I present brief status reports on three large observational projects that are designed to test our current understanding of the evolution of cataclysmic variables (CVs): The spectroscopic selection of new CVs in the Hamburg Quasar Survey, the search for pre-CVs based on Sloan colours and UK Schmidt/6dF multiobject spectroscopy, and the identificat…

2004 • Revista Mexicana de Astronomia y Astrofisica Conference Series

eHST 4

High-resolution spectroscopy of flat-spectrum quasars. I. Redshifted emission and absorption in PKS 2145+067

DOI: 10.1051/0004-6361:20035861 Bibcode: 2004A&A...423..943T

Black, J. H.; Tappe, A.

We report Very Large Telescope (VLT) observations of the quasar PKS 2145+067. We obtained high-resolution (R≈100 000 or 3 km s^-1) optical spectra with the UV-Visual Echelle Spectrograph (UVES) at the VLT UT2 telescope. The emission redshift measured from \ion{[O}{iii]} is z_em =1.0003. In our spectra, the we…

2004 • Astronomy and Astrophysics

eHST 4

High-resolution near-infrared speckle interferometry and radiative transfer modeling of the OH/IR star OH 104.9+2.4

DOI: 10.1051/0004-6361:20040352 Bibcode: 2004A&A...424..165R

Weigelt, G.; Hofmann, K. -H.; Men'shchikov, A. B. +3 more

We present near-infrared speckle interferometry of the OH/IR star OH 104.9+2.4 in the K' band obtained with the 6 m telescope of the Special Astrophysical Observatory (SAO). At a wavelength of λ = 2.12 µm the diffraction-limited resolution of 74 mas was attained. The reconstructed visibility reveals a spherically symmetric…

2004 • Astronomy and Astrophysics

ISO 4

Analysis of RGU Photometry in Selected Area 51

DOI: 10.48550/arXiv.astro-ph/0407046 Bibcode: 2004TJPh...28..289B

Bilir, S.; Karaali, S.; Buser, R.

A low-latitude anticenter field (l=189 °, b=+21 °) is investigated by using the full calibration tools of RGU photometry. The observed RGU data are reduced to the standard system and the separation of dwarfs and evolved stars is carried out by an empirical method. Stars are categorized into three metallicity classes, i.e. -0.25<[M/H]≤+0.50, $-1…

2004 • Turkish Journal of Physics

Hipparcos 4

Cluster observes formation of high-beta plasma blobs

DOI: 10.5194/angeo-22-2391-2004 Bibcode: 2004AnGeo..22.2391H

Glassmeier, K.; Klecker, B.; Rème, H. +4 more

Available from http://www.copernicus.org/site/EGU/annales/22/7/2391.htm?FrameEngine=false;

2004 • Annales Geophysicae

Cluster 4

Rapid Variations in RS Oph Observed by OMC/INTEGRAL

Bibcode: 2004IBVS.5562....1S

Hudec, R.; Hroch, F.; Simon, V.

2004 • Information Bulletin on Variable Stars

INTEGRAL 4

XX Ophiuchi in Deep Minimum after 37 Years

Bibcode: 2004IBVS.5571....1S

Sobotka, P.

XX Ophiuchi is a unique object, which is very difficult to classify. This star only slowly varied around the maximum magnitude (V approx 9 mag) during the past 37 years. In March 2004, the brightness started to fade by 0.2 mag per month. I stress the urgent need of the spectroscopic observations during this minimum.

2004 • Information Bulletin on Variable Stars

INTEGRAL 3

Photometry of 20 eclipsing and ellipsoidal binary systems

Bibcode: 2004JAD....10....1S

Shobbrook, R. R.

A total of almost 2000 V observations of 20 eclipsing and ellipsoidal bright binary stars was collected between 1991 and 2001 for the purpose of determining more recent epoch ephemerides for the light curves than are available in the literature. The original purpose was to provide the Sydney University Stellar Interferometer (SUSI) with orbital pe…

2004 • Journal of Astronomical Data

Hipparcos 3

Physical structure of the local interstellar medium

DOI: 10.1016/j.asr.2003.02.053 Bibcode: 2004AdSpR..34...41R

Linsky, J. L.; Redfield, S.; Wood, B. E.

The physical structure and morphology of the interstellar medium that surrounds our solar system directly effects the heliosphere and the interplanetary environment. High resolution ultraviolet absorption spectra of nearby stars and the intervening interstellar medium, observed by the Hubble Space Telescope, provide important information about the…

2004 • Advances in Space Research

eHST 3