25 citations · 49 across the 3 of their papers we have counts for
5 papers
The born-again planetary nebula A78: an X-ray twin of A30
J. A. Toalá, M. A. Guerrero, H. Todt +8
We present the XMM-Newton discovery of X-ray emission from the planetary nebula (PN) A78, the second born-again PN detected in X-rays apart from A30. These two PNe share similar sp…
The Present and Future of Planetary Nebula Research. A White Paper by the IAU Planetary Nebula Working Group
K. B. Kwitter, R. H. Méndez, M. Peña +10
We present a summary of current research on planetary nebulae and their central stars, and related subjects such as atomic processes in ionized nebulae, AGB and post-AGB evolution.…
Spectroscopic Observations of Planetary Nebulae in the Northern Spur of M31
X. Fang, Y. Zhang, R. Garcia-Benito +2
We present spectroscopy of three planetary nebulae (PNe) in the Northern Spur of the Andromeda Galaxy (M31) obtained with the Double Spectrograph on the 5.1 m Hale Telescope at the…
[Fe III] emission lines in the planetary nebula NGC 2392
Y. Zhang, X. Fang, W. Chau +4
NGC 2392 is a young double-shell planetary nebula (PN). Its intrinsic structure and shaping mechanism are still not fully understood. In this paper we present new spectroscopic obs…
Very deep spectroscopy of the bright Saturn Nebula NGC 7009 -- I. Observations and plasma diagnostics
X. Fang, X. -W. Liu
We present very deep CCD spectrum of the bright, medium-excitation planetary nebula NGC 7009, with a wavelength coverage from 3040 to 11000 A. Traditional emission line identificat…