523 citations · 4.6k across the 117 of their papers we have counts for
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The fractal spatial distribution of stars in open clusters and stellar associations
Nestor Sanchez, Emilio J. Alfaro
The Interstellar Medium has a fractal structure, in the sense that gas and dust distribute in a hierarchical and self-similar manner. Stars in new-born cluster probably follow the…
The Galactic O-Star Spectroscopic Survey (GOSSS)
J. Maíz Apellániz, A. Sota, N. R. Walborn +6
We present a massive spectroscopic survey of Galactic O stars, GOSSS, based on new, high signal-to-noise ratio, R~2500 blue-violet digital observations from both hemispheres. The s…
The fractal dimension of star-forming regions at different spatial scales in M33
Nestor Sanchez, Neyda Anez, Emilio J. Alfaro +1
We study the distribution of stars, HII regions, molecular gas, and individual giant molecular clouds in M33 over a wide range of spatial scales. The clustering strength of these c…
Early Results from the Galactic O-Star Spectroscopic Survey: C III Emission Lines in Of Spectra
Nolan R. Walborn, Alfredo Sota, Jesus Maiz Apellaniz +5
On the basis of an extensive new spectroscopic survey of Galactic O stars, we introduce the Ofc category, which consists of normal spectra with C III λ\lambda4647-4650-4652 emissio…
On the multiplicity of the zero-age main-sequence O star Herschel 36
Julia I. Arias, Rodolfo H. Barba, Roberto C. Gamen +6
We present the analysis of high-resolution optical spectroscopic observations of the zero-age main-sequence O star Herschel 36 spanning six years. This star is definitely a multipl…