Results 111 to 120 of about 174,483 (232)

Identification Charts for Planetary Nebulae

open access: yesJournal of Mathematical and Fundamental Sciences, 2019
. At Dr. L. Perek's request, identification charts for 12 known planetary nebulae, of which the locations were not certain, are given.   Ichtisar. Atas permintaan Dr. L. Perek, peta pengenal untuk 12 kabut planit jang letaknja diragukan, disadjikan dalam
Pik Sin The
doaj  

PyEMILI: A New Generation Computer-aided Spectral Line Identifier

open access: yesThe Astrophysical Journal Supplement Series
Deep high-dispersion spectroscopy of Galactic photoionized gaseous nebulae, mainly planetary nebulae and H ii regions, has revealed numerous emission lines.
Zhijun Tu   +3 more
doaj   +1 more source

The Secular Evolution of Planetary Nebula IC 418 and Its Implications for Carbon Star Formation

open access: yesThe Astrophysical Journal Letters
The rate of stellar evolution can rarely be measured in real time. The fastest evolution (excluding event-driven evolution), where stars may evolve measurably over decades, is during the post–Asymptotic Giant Branch (AGB) phase. In this Letter we provide
Albert A. Zijlstra, Quentin A. Parker
doaj   +1 more source

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