93 citations · 206 across the 4 of their papers we have counts for
6 papers
Lyman alpha emission in high-redshift galaxies
C. Tapken, I. Appenzeller, S. Noll +4
A significant fraction of the high-redshift galaxies show strong Lyman emission lines. For redshifts z>5, most known galaxies belong to this class. However, so far not much is know…
Medium-resolution spectroscopy of galaxies with redshifts 2.3 < z < 3.5
D. Mehlert, C. Tapken, I. Appenzeller +3
Using FORS2 at the ESO VLT we obtained medium resolution (R ~ 2000) spectra of 12 galaxies with 2.37 < z < 3.40 in the FORS Deep Field. Two individual spectra with good S/N and a c…
Lyman-alpha emission galaxies at a redshift of z = 5.7 in the FORS Deep Field
C. Tapken, I. Appenzeller, A. Gabasch +7
We present the results of a search for Lyman-alpha emission galaxies at z~ 5.7 in the FORS Deep Field. The objective of this study is to improve the faint end of the luminosity fun…
Testing the inverse-Compton catastrophe scenario in the intra-day variable blazar S5 0716+71. I. Simultaneous broadband observations during November 2003
L. Ostorero, S. J. Wagner, J. Gracia +6
Some intra-day variable, compact extra-galactic radio sources show brightness temperatures severely exceeding 10^{12} K, the limit set by catastrophic inverse-Compton (IC) cooling…
SDSS J1553+0056: A BALQSO mimicking a Lyman-break galaxy
I. Appenzeller, O. Stahl, C. Tapken +2
Using the UVES echelle spectrograph at the ESO VLT we obtained high-resolution (R = 40 000) spectra of the object SDSS J1553+0056, which has been identified in the literature alter…
The nature of the Lyman-alpha emission region of FDF-4691
C. Tapken, I. Appenzeller, D. Mehlert +2
In order to study the origin of the strong Lyman-alpha emission of high-redshift starburst galaxies we observed and modeled the emission of the z = 3.304 galaxy FDF-4691 (rest-fram…