Search Publications
GaBoDS: the Garching-Bonn Deep Survey. III. Lyman-break galaxies in the Chandra Deep Field South
Simon, P.; Schrabback, T.; Bomans, D. J. +10 more
We present first results of our search for high-redshift galaxies in deep CCD mosaic images. As a pilot study for a larger survey, very deep images of the Chandra Deep Field South (CDFS), taken with WFI@MPG/ESO2.2m, are used to select large samples of 1070 U-band and 565 B-band dropouts with the Lyman-break method. The data of these Lyman-break ga…
Magnetic network dynamics: Activity level, feature size and anchoring depth
Meunier, N.
A large data set of MDI magnetograms is studied in order to analyze the global dynamics of magnetic structures from network to active regions. Two complementary techniques are used: feature tracking and correlation tracking. The very large data set allows the variation of their dynamics (angular rotation velocity and meridional circulation) to be …
The ISO-2MASS AGN survey: on the type-1 sources
Cesarsky, C.; Siebenmorgen, R.; Haas, M. +9 more
We combined the ISOCAM Parallel Mode Survey at 6.7 µm (LW2 filter) with the Two Micron All Sky Survey in order to obtain a powerful tool to search for AGN independent of dust extinction. Using moderate colour criteria H-K>0.5 and K-LW2>2.7 we have selected a sample of 77 AGN candidates in an effective area of ~10 square degrees. By mea…
Absolute spectrophotometry of northern compact planetary nebulae
Corradi, R. L. M.; Wright, S. A.; Perinotto, M.
We present medium-dispersion spectra and narrowband images of six northern compact planetary nebulae (PNe):
Early signatures of large-scale field line opening. Multi-wavelength analysis of features connected with a "halo" CME event
Vilmer, N.; Pohjolainen, S.; Khan, J. I. +1 more
A fast "halo"-type coronal mass ejection (CME) associated with a two-ribbon flare, GOES class M 1.3, was observed on February 8, 2000. Soft X-ray and EUV images revealed several loop ejections and one wave-like moving front that started from a remote location, away from the flare core region. A radio type-II burst was observed near the trajectory …
The widths of vacuum-ultraviolet spectral lines in the equatorial solar corona observed with CDS and SUMER
Dwivedi, B. N.; Harrison, R. A.; Wilhelm, K. +3 more
Observations of the solar equatorial corona between heights of 36 Mm and 184 Mm above the limb obtained by the SOHO spectrometers CDS and SUMER in December 2003 are presented and discussed with special emphasis on the widths of the spectral lines Mg x at 62.50 nm, Al xi at 55.00 nm and 56.82 nm, Ca x at 55.78 nm, and Si xi at 58.09 nm. SUMER obser…
The disrupted molecular envelope of Frosty Leo
Sahai, R.; Sánchez Contreras, C.; Alcolea, J. +2 more
We present maps of CO emission in the protoplanetary nebula Frosty Leo. Observations of the rotational transitions 12CO J=2{-}1 and 1 0 have been obtained with the IRAM interferometer and the OVRO array. The molecular envelope of Frosty Leo is found to be complex and compact; most of the gas extends ⪉6´´ and shows a structure that is ve…
Very long period activity at the base of solar wind streams
Doyle, J. G.; Xia, L. D.; Banerjee, D. +2 more
Using time series data of spectral lines originating from a wide range of temperatures in the solar transition region, above a polar coronal hole, from SUMER (Solar Ultraviolet Measurements of Emitted Radiation) on SoHO (Solar and Heliospheric Observatory), we report on the detection of very long (≈170 min) periodic intensity fluctuations, above t…
Millisecond radio spikes in the decimetre band and their related active solar phenomena
Siarkowski, M.; Falewicz, R.; Rudawy, P. +2 more
We present here a brief description of thirteen events of the narrowband solar millisecond radio spike emissions observed between February 2000 and December 2001. The total observing time was 1990.4 h, collected during the 357 observing days. The data were collected with the 15-m radio telescope and fast radiospectrograph of Toruń Observatory, Pol…
HST and spectroscopic observations of the L1551 IRS5 jets (HH154)
Liseau, R.; White, G. J.; Favata, F. +4 more
We have carried out a thorough optical study of the closest star formation jet. The inner arcminute surrounding the class 0/I binary protostar L1551 IRS5 and its associated jet (HH154) have been observed using the Hubble Space Telescope with the WFPC2 camera, the ESO New Technology Telescope with the EMMI spectrograph and the Nordic Optical Telesc…