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Modeling the (upper) solar atmosphere including the magnetic field

Peter, H.

The atmosphere of the Sun is highly structured and dynamic in nature. From the photosphere and chromosphere into the transition region and the corona plasma- β changes from above to below one, i.e., while in the lower atmosphere the energy density of the plasma dominates, in the upper atmosphere the magnetic field plays the governing role - one mi…

The Ultraviolet Spectra of the Weak Emission Line Central Stars of Planetary Nebulae

Marcolino, W. L. F.; de Araújo, F. X.; Junior, H. B. M. +1 more

The UV spectra of all "weak emission line central stars of planetary nebulae" (WELSs) with available IUE data are presented and discussed. We performed line identifications and equivalent-width and flux measurements for several features in the spectra. We found that the WELSs can be divided into three different groups regarding their UV spectra: (…

Response of the Solar Atmosphere to Magnetic Flux Emergence from Hinode Observations

Tsuneta, Saku; Shibasaki, Kiyoto; Li, Hui +14 more

A molecular gas study of low luminosity radio galaxies

Prandoni, I.; Wilson, T. L.; de Ruiter, H. R. +3 more

We discuss CO spectral line data of a volume-limited sample of 23 nearby ( z < 0.03) low luminosity radio galaxies, selected from the B2 catalogue. We investigate whether the CO properties of our sample are correlated with the properties of the host galaxy, and in particular with the dust component. We find strong evidences for a physical link …

Rest-Frame R-band Light Curve of a z ~ 1.3 Supernova Obtained with Keck Laser Adaptive Optics

Lidman, C.; Rubin, D.; Aldering, G. +24 more

We present Keck diffraction-limited H-band photometry of a z~1.3 Type Ia supernova (SN) candidate, first identified in a Hubble Space Telescope search for SNe in massive high-redshift galaxy clusters. The adaptive optics (AO) data were obtained with the Laser Guide Star facility during four observing runs from 2005 September to November. In the an…

Compositional dependence of infrared absorption spectra of crystalline silicates. III. Melilite solid solution

Koike, C.; Tsuchiyama, A.; Chihara, H.

The infrared optical properties and absorption spectra of the melilite solid solution series are reported. Melilite is a high-temperature condensate, and is expected to condense during the early phase of the condensation sequence. In this study, samples of the melilite solid solution series were newly synthesized between the aluminium end member (…

The Spitzer IRS Infrared Spectrum and Abundances of the Planetary Nebula IC 2448

Pottasch, S. R.; Bernard-Salas, J.; Roellig, T. L. +1 more

We present the mid-infrared spectrum of the planetary nebula IC 2448. In order to determine the chemical composition of the nebula, we use the infrared line fluxes from the Spitzer spectrum along with optical line fluxes from the literature and ultraviolet line fluxes from archival IUE spectra. We determine an extinction of C_Hβ=0.27 fro…

Asteroseismology of exoplanets host stars: the special case of ι Horologii (HD 17051)

Vauclair, S.; Laymand, M.

Aims:This paper presents detailed analysis and modelisation of the star HD 17051 (alias ι Hor), which appears to be a specially interesting case among exoplanet host stars. Like most of these stars, ι Hor presents a metallicity excess that has been measured by various observers who give different results, ranging from [ Fe/H] = 0.11 to 0.26 and as…

Swift and Suzaku Observations of the X-Ray Afterglow from the GRB 060105

Maeda, Yoshitomo; Kelley, Richard L.; Yamaoka, Kazutaka +34 more

Results are presented of early X-ray afterglow observations of GRB 060105 by Swift and Suzaku. The bright, long gamma-ray burst GRB 060105 triggered the Swift Burst Alert Telescope at 06:49:28 on 2006 January 5 (T₀). The Suzaku team commenced a pre-planned target of opportunity observation at 19ks (5.3hr) after the Swift trigger. The X-…

Erratum to “Cassini observations of Saturn's inner plasmasphere: Saturn orbit insertion results”. [Planetary and Space Science 54 (2006) 1197 1210]

Coates, A. J.; Johnson, R. E.; Thomsen, M. +13 more