61 citations · 334 across the 18 of their papers we have counts for
18 papers
The Planetary Nebula in the 500 Myr old Open Cluster M37
Vasiliki Fragkou, Quentin A. Parker, Albert A. Zijlstra +3
We report confirmation of a large, evolved, bipolar planetary nebula and its blue, white dwarf central star as a member of the ~500 Myr old Galactic open star cluster M37 (NGC 2099…
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…
History of the mass ejection in K 4-37: from the AGB to the evolved planetary nebula phase
L. F. Miranda, P. F. Guillén, L. Olguín +1
We present narrow-, broad-band, and WISE archive images, and high- and intermediate-resolution long-slit spectra of K 4-37, a planetary nebula that has never been analyzed in detai…
NGC 6309, a Planetary Nebula that Shifted from Round to Multipolar
Gabriel Rubio, Roberto Vazquez, Gerardo Ramos-Larios +4
We present new narrow-band Ha, [N II], and [O III] high-resolution images of the quadrupolar planetary nebula (PN) NGC 6309 that show in great detail its bipolar lobes and reveal n…
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…