45 citations · 144 across the 6 of their papers we have counts for
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astro-ph.SR2014★ 13 cited
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…
astro-ph.SR2014★ 45 cited
A spectroscopic census in young stellar regions: the Sigma Orionis cluster
Jesús Hernández, Nuria Calvet, Alice Perez +7
We present a spectroscopic survey of the stellar population of the Sigma Orionis cluster. We have obtained spectral types for 340 stars. Spectroscopic data for spectral typing come…