Limits on the D:H ratio in the interstellar medium from molecular observations
The abundance ratio of D:H in the interstellar medium can be derived either more directly from the UV absorption measurements of HD and H2 in the spectra of...
Line Identification And Equivalent Width Measurements Of Atomic Lines In Spectra Of 40 Late M Dwarfs
We present preliminary results of line identification and equivalent width measurements in spectra of late M Dwarfs. We obtained 3.5 nights on Keck NASA time to...
Line intensities of SDSS HII regions (Pilyugin+, 2010)
Spectra of high-metallicity [12+log(O/H)>~8.2] HII regions, where oxygen auroral lines are measurable in both the O+ and O++ zones, have been extracted from the...
Line ratio method applied to inter-network magnetic fields
We investigate the validity of the Stokes V amplitude ratio as an indicator of the magnetic field strength in solar inter-network regions with the help ofMHD...
Line Strength Mapping of the Stellar Populations within Elliptical Galaxies
Given the relevance of line strength gradients to study the formation and secular evolution of elliptical galaxies, we propose to measure deep line strength...
L-type ultra-cool dwarfs are known to have a dusty atmosphere. Surface heterogeneities, due to cloud patterns or rotationally-induced oblateness, would result...
Linear quadratic Gaussian predictive control for the Gran Telescopio Canarias AO system: design issues and first bench results
The Gran Telescopio Canarias (GTC) will be soon equipped with an Adaptive Optics (AO) system. The GTCAO system is currently at the Instituto de Astrofisica de...