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45 papers · 2 filters
Did Most High-Redshift Quasars Escape Detection?
C. Wolf, K. Meisenheimer, H. -J. Roeser +1
We present follow-up spectroscopy to the Calar Alto Deep Imaging Survey (CADIS), reporting on the quasars in the CADIS 16h-field, and including preliminary data from two other fiel…
Infrared Spectra of Meteoritic SiC Grains
A. C. Andersen, C. Jager, H. Mutschke +5
We present here the first infrared spectra of meteoritic SiC grains. The mid-infrared transmission spectra of meteoritic SiC grains isolated from the Murchison meteorite were measu…
The detection of extragalactic N: Consequences for nitrogen nucleosynthesis and chemical evolution
Yi-nan Chin, Christian Henkel, Norbert Langer +1
Detections of extragalactic N are reported from observations of the rare hydrogen cyanide isotope HCN toward the Large Magellanic Cloud (LMC) and the core of the (pos…
The time structure of Cherenkov images generated by TeV gamma-rays and by cosmic rays
HEGRA Collaboration, M. Hess et al
The time profiles of Cherenkov images of cosmic-ray showers and of gamma-ray showers are investigated, using data gathered with the HEGRA system of imaging atmospheric Cherenkov te…
Isophot Observations of Comet Hale-Bopp: Initial Data Reduction
E. Grün, S. B. Peschke, M. Stickel +17
Comet Hale-Bopp was observed five times with ISOPHOT, the photometer on board the Infrared Space Observatory (ISO). Each time broadband photometry was performed using 4 different d…
Redshifts of New Galaxies
Halton Arp
Observations increasingly demonstrate the spatial association of high redshift objects with larger, low redshift galaxies. These companion objects show a continuous range of physic…