Accurate number densities and environment for compact and relic massive galaxies
The quest to find relic galaxies is ongoing, i.e. galaxies that seem to remain untouched from the primeval Universe. These galaxies are usually massive (> 8×10^...
Accurate wavelengths in the Sun spectrum (Allende Prieto+ 1998)
Central line wavelengths in the spectrum of the Sun observed at the centre of the disc, and in the flux spectrum, line identification and solar log(gf). (1 data...
Achieving a few cm/sec calibration repeatability for high resolution spectrographs: the laser frequency comb on HARPS
The laser frequency comb, with its extreme precision, opens a new window for high precision spectroscopy for current facilities, as well as for the ELT's. We...
ACO 1825 and AC 114 EROs photometry (Hempel+, 2008)
New z-band (F850LP, denoted z850 hereafter) imaging was obtained with the ACS camera onboard HST in November 2004 (AC114) and July 2005 (Abell 1835). The 3.6, 4...
Acoustic Oscillations in Main-Sequence Stars: HD155543
High-speed photometric techniques have been found useful as a way to study the acoustic mode signature in low main sequence stars. In this work, the discovery...
Simultaneous spectrometric and photometric observations have been performed on the red giant star Arcturus, in a search for radial velocity or luminosity...
Acquisition cameras and wavefront sensors for the GTC 10-m telescope
The GTC Acquisition Cameras and Wavefront Sensors are based on a modular design with remote, low-profile and lightweight CCD heads and a compact CCD controller...