HII Region Luminosity Functions: Derivation of a New Standard Candle for Extragalactic Distances
We propose the use of the break in the HII region luminosity function (LF) as a possible refined powerful standard candle for extragalactic distances. The...
HII Regions Feeding the Interstellar Medium in M 83
We analyse the internal dynamics of star-forming H ii regions and their efficiency in interacting with the ISM. We have selected the nearby (4.5 Mpc) spiral...
HII regions in NGC 5457 and NGC 4395 (Cedres+, 2002)
Line intensities, visual extinction, abundances and ionization hardness parameter for HII regions in two spiral galaxies are presented. The following galaxies...
Hilbert scanning arithmetic coding for multispectral image compression
We consider the compression of multispectral images using Hilbert scanning and adaptive arithmetic coding. The Hilbert scan is a general technique for...
Hinode Observations of Flux Emergence in Quiet and Active Regions
We review briefly the observational understanding of emergence of flux in both the quiet Sun and active regions in the light of first results from the joint...
Hints of the Star Formation History in a SMC Field
We present here a part of the project aimed to study the SFH in different parts of the SMC. We observed 12 fields during a four year campaign (2001-2004) using...
In the framework of a long-term program aimed at studying stellar populations in the Carina dSph galaxy, we present the photometric calibration of the two...