Measurement of Galactic Logarithmic Spiral Arm Pitch Angle Using Two-Dimensional Fast Fourier Transform Decomposition
A logarithmic spiral is a prominent feature appearing in a majority of observed galaxies. This feature has long been associated with the traditional Hubble...
Measurement of Rotational State-To Relaxation Coefficients by Raman-Raman Double Resonance. Application to Self-Collisions in Acetylene.
We have developed a technique for the measurement of state-to-state rotational relaxation rates due to collisions in the gas phase. A single J state of the v_{2...
Measurements and Simulations of Regolith Surface Roughness Effects in XRF
Analyses of fluorescent soft X-ray spectra from planetary surfaces obtained by orbiting spacecraft use the intensities of elemental emission lines and their...
Measurements of 4He in metal-poor extragalactic H ii regions: the primordial Helium abundance and the ΔY/ΔO ratio
We present a review on the determination of the primordial helium abundance Yp, based on the study of hydrogen and helium recombination lines in extragalactic H...
Measurements of the solar aureole at the Teide Observatory
Daily measurements of the solar aureole were made at the Vacuum Newton Telescope (/D=40 cm) at the Teide Observatory (Tenerife) for various airmasses. We use...
Measuring brown dwarf properties from deep surveys .
We discuss brown dwarf properties that can be measured from current and future deep surveys, and how fundamental parameters, such as the mass function and...