61 citations · 334 across the 18 of their papers we have counts for
5 papers · 1 filter
pyUPMASK: an improved unsupervised clustering algorithm
M. S. Pera, G. I. Perren, A. Moitinho +2
Aims. We present pyUPMASK, an unsupervised clustering method for stellar clusters that builds upon the original UPMASK package. Its general approach makes it plausible to be applie…
Weak and Extended H2 Emission in NGC 6369
Gerardo Ramos-Larios, Martin A. Guerrero, Roberto Vazquez +1
NGC 6369 is a double-shell PN with a filamentary outer shell or envelope and faint bipolar extensions. We have used ground- and space-based narrowband optical and near-IR images, b…
Comments on the "Monoceros" affair
M. Lopez-Corredoira, A. Moitinho, S. Zaggia +5
This is a brief note to comment on some recent papers addressing the Monoceros ring. In our view, nothing new was delivered on the matter: No new evidence or arguments are presente…
Discovery of Multiple Shells Around the Planetary Nebula IC 418
Gerardo Ramos-Larios, Roberto Vazquez, Martin A. Guerrero +3
We have analysed optical, near-, and mid-IR images of the bright planetary nebula (PN) IC 418. These images probe unambiguously for the first time a number of low surface brightnes…
CCD UBVRI Photometry of the Galactic open clusters: Be~89, Ru~135, and Be~10
Inci Akkaya, William J. Schuster, Raul Michel +4
The fundamental parameters of reddening, metallicity, age, and distance are presented for the poorly studied open clusters Be~89, Ru~135, and Be~10, derived from their CCD UBVRI ph…