Keck Spectroscopy of Z ~ 3 Galaxies in the Hubble Deep Field
We have obtained spectra with the 10-m Keck telescope of a sample of 24 galaxies having colors consistent with star-forming galaxies at redshifts 2 ≲ z ≲ 4.5 in...
Kelvin-Helmholtz and Rayleigh-Taylor instabilities in partially ionised prominences
We study the modification of the classical criterion for the linear onset and growing rate of the Kelvin-Helmholtz Instability (KHI) and the Rayleigh-Taylor...
Kepler observations: Light shed on the hybrid γ Doradus - δ Scuti pulsation phenomenon
Through the observational study of stellar pulsations, the internal structure of stars can be probed and theoretical models can be tested. The main sequence γ...
KIC 6761539, a fast rotating γ Dor - δ Sct hybrid star
KIC 6761539 is one of many fast rotating γ Doradus - δ Scuti hybrid pulsators. A search for possible regularities in the frequency spectrum is performed and a...
KIC 9163796 - Age determination by asteroseismic grid modelling for an oscillating red giant binary
The age of a star cannot be measured but only inferred from observational quantities related to age. A wellknown stellar age greatly impacts our understanding...
Several kiloparsec-scale X-ray jets have now been discovered with the Chandra X-ray Observatory, extending up to ~50 kpc (projected distance) from the active...
Kinematic Analysis of the Double-Barred Galaxy NGC 357
We present a kinematic analysis of the double-barred early-type galaxy NGC 357. The radial velocity and velocity dispersion profiles along both the nuclear bar...