523 citations · 4.6k across the 117 of their papers we have counts for
6 papers · 1 filter
On the Fractal Distribution of HII Regions in Disk Galaxies
Nestor Sanchez, Emilio J. Alfaro
In this work we quantify the degree to which star-forming events are clumped. We apply a precise and accurate technique to calculate the correlation dimension Dc of the distributio…
First results from the ALHAMBRA-Survey
A. Fernandez-Soto, J. A. L. Aguerri, E. J. Alfaro +17
We present the first results from the ALHAMBRA survey. ALHAMBRA will cover a relatively wide area (4 square degrees) using a purposely-designed set of 20 medium-band filters, down…
The Fractal Distribution of HII Regions in Disk Galaxies
Nestor Sanchez, Emilio J. Alfaro
It is known that the gas has a fractal structure in a wide range of spatial scales with a fractal dimension that seems to be a constant around Df = 2.7. It is expected that stars f…
Accurate distances to nearby massive stars with the new reduction of the Hipparcos raw data
J. Maíz Apellániz, E. J. Alfaro, A. Sota
We use the new reduction of the Hipparcos data (van Leeuwen 2007) and a self-consistent distance determination technique for Lutz-Kelker limited samples to obtain distances to the…
Determining the Fractal Dimension of the Interstellar Medium
Nestor Sanchez, Emilio J. Alfaro, Enrique Perez
The Interstellar Medium seems to have an underlying fractal structure, which can be characterized through its fractal dimension (Df). However, several factors may affect the determ…
Spectroscopic monitoring of Southern Galactic O and WN stars: State of the Art in 2007
R. Gamen, R. Barba, N. Morrell +5
We are conducting a spectroscopic monitoring of O and WN -type stars in our Galaxy. In this work, we summarize some of our first results related to the search for radial-velocity v…