Science Archives Publication System

Properties of a bifurcated current sheet observed on 29 August 2001

DOI: 10.5194/angeo-22-2535-2004 Bibcode: 2004AnGeo..22.2535R

Balogh, A.; Klecker, B.; Nakamura, R. +7 more

Available from http://www.copernicus.org/site/EGU/annales/22/7/2535.htm?FrameEngine=false;

2004 • Annales Geophysicae

Cluster 18

Abundances in planetary nebulae: Me 2-1

DOI: 10.1051/0004-6361:20047041 Bibcode: 2004A&A...421.1051S

Pottasch, S. R.; García-Lario, P.; Surendiranath, R.

ISO and IUE spectra of the round planetary nebula Me 2-1 are combined with visual spectra taken from the literature to obtain for the first time a complete extinction-corrected spectrum. With this, the physico-chemical characteristics of the nebula and its central star are determined by various methods including photoionization …

2004 • Astronomy and Astrophysics

ISO IUE eHST 18

A study of the electrical charging of the Rosetta orbiter: 1. Numerical model

DOI: 10.1029/2003JA009836 Bibcode: 2004JGRA..109.1104R

Berthelier, Jean-Jacques; Roussel, Jean-FrançOis

Charging of spacecraft in terrestrial or planetary ionospheres and magnetospheres is a well-known effect which may have detrimental consequences for in-situ plasma measurements. The case of the Rosetta mission is of particular importance because the expected temperatures of cometary ions and electrons in the inner coma of comet Wirtanen are very l…

2004 • Journal of Geophysical Research (Space Physics)

Rosetta 18

Astrometric Star Catalogues as Combination of Hipparcos/Tycho Catalogues with Ground-Based Observations

Bibcode: 2004SerAJ.168....1V

Vondrak, J.

The successful ESA mission Hipparcos provided very precise parallaxes, positions and proper motions of many stars in optical wavelength. Therefore, it is a primary representation of International Celestial Reference System in this wavelength. However, the shortness of the mission (less than four years) causes some problems with proper motions of t…

2004 • Serbian Astronomical Journal

Hipparcos 18

X-Ray Measurement of Dark Matter ``Temperature'' in A1795

DOI: 10.1086/421986 Bibcode: 2004ApJ...611..175I

Kitayama, Tetsu; Böhringer, Hans; Ikebe, Yasushi

We present a method from an X-ray observation of a galaxy cluster to measure the radial profile of the dark matter velocity dispersion, σ_DM, and to compare the dark matter ``temperature'' defined as µm_pσ²_DM/k_B with the gas temperature. The method is applied to the XMM-Newton observation …

2004 • The Astrophysical Journal

XMM-Newton 18

A high resolution spectroscopic study of the extraordinary planetary nebula LMC-N66

DOI: 10.1051/0004-6361:20035884 Bibcode: 2004A&A...419..583P

Hamann, W. -R.; Ruiz, M. T.; Peña, M. +2 more

The planetary nebula N66 in the Large Magellanic Cloud is an extraordinary object, as it is the only confirmed PN where the central star is a Wolf-Rayet star of the nitrogen sequence, i.e. of type [WN]. Moreover, the star showed a dramatic brightness outburst in 1993-1994. In a previous paper (Hamann et al. \cite{Hamann03}) we analyzed the changin…

2004 • Astronomy and Astrophysics

eHST 18

Dust production and coma morphology of 67P/Churyumov-Gerasimenko during the 2002/2003 apparition. II. A comparative study of dust production in 46P/Wirtanen and 67P/Churyumov-Gerasimenko during their 2002/2003 apparition

DOI: 10.1051/0004-6361:20035877 Bibcode: 2004A&A...420..389K

Kidger, M. R.

A comparison is made of the light curves and and dust production of the initial target for the ROSETTA mission, 46P/Wirtanen and the new target 67P/Churyumov-Gerasimenko during their recent 2002/2003 apparition. The study is based on amateur CCD monitoring using a standardised method to produce consistent photometry in Johnson-Kron-Cousins system.…

2004 • Astronomy and Astrophysics

Rosetta 18

Search for 1-10 Hz modulations in coronal emission with SECIS during the August 11, 1999 eclipse

DOI: 10.1051/0004-6361:20031737 Bibcode: 2004A&A...416.1179R

Keenan, F. P.; Phillips, K. J. H.; Williams, D. R. +3 more

Results of the search of the periodic changes of the 530.3 nm line intensity emitted by selected structures of the solar corona in the frequency range 1-10 Hz are presented. A set of 12 728 images of the section of the solar corona extending from near the north pole to the south-west were taken simultaneously in the 530.3 nm (``green'') line and w…

2004 • Astronomy and Astrophysics

SOHO 18

Photochemical Concepts on the Origin of Biomolecular Asymmetry

DOI: 10.1023/B:ORIG.0000009832.71546.1d Bibcode: 2004OLEB...34..111M

Meierhenrich, Uwe J.; Thiemann, Wolfram H. -P.

Biopolymers like DNA and proteins are strongly selective towards the chirality of their monomer units. The use of homochiral monomers is regarded as essential for the construction and function of biopolymers; the emergence of the molecular asymmetry is therefore considered as a fundamental step in Chemical Evolution. This work focuses on physicoch…

2004 • Origins of Life and Evolution of the Biosphere

Rosetta 18

Structure and Evolution of Starburst and Normal Galaxies

DOI: 10.1086/378180 Bibcode: 2004ApJ...600L.143M

Grogin, Norman A.; Lucas, Ray A.; de Mello, Duilia +5 more

A comparative study of the rest-frame morphology and structural properties of optically selected starburst galaxies at redshift z<~1 is carried out using multi-wave-band (BViz) high-resolution images taken by the Advanced Camera for Surveys as part of the Great Observatories Origins Deep Survey. We classify galaxies into starburst, early, and l…

2004 • The Astrophysical Journal

eHST 18