The long-period binary central stars of the planetary nebulae NGC 1514 and LoTr 5 [PDF]
, 2017 The importance of long-period binaries for the formation and evolution of planetary nebulae is still rather poorly understood, which in part is due to the lack of central star systems that are known to comprise such long-period binaries.
David Jones +4 more
semanticscholar +1 more source
Nebular Spectroscopy: A Guide on H ii Regions and Planetary Nebulae [PDF]
, 2017 We present a tutorial on the determination of the physical conditions and chemical abundances in gaseous nebulae. We also include a brief review of recent results on the study of gaseous nebulae, their relevance for the study of stellar evolution ...
M. Peimbert +2 more
semanticscholar +1 more source
Planetary Nebulae that Cannot Be Explained by Binary Systems [PDF]
, 2016 We examine the images of hundreds of planetary nebulae (PNe) and find that for about one in six PNe the morphology is too “messy” to be accounted for by models of stellar binary interaction.
Ealeal Bear, N. Soker
semanticscholar +1 more source
MULTI-STAGES OPTIMIZED PHOTOIONIZATION MODELLING OF PLANETARY NEBULA LMC SMP-21
Odessa Astronomical Publications, 2012 The new approximation expression for the representation of gas density distribution in planetary nebulae envelopes was proposed. The new multi-stages method for the caclulation of the chemical composition and physical parameters of planetary nebulae ...
B. Ya. Melekh +5 more
doaj +1 more source
On the Age of Galactic Bulge CSPNe: Too Young and Complicated?
Galaxies, 2020 We present preliminary results of our study of a small sample of planetary nebulae in the Galactic Bulge for which high-angular resolution Hubble Space Telescope imaging is available.
Foteini Lykou +2 more
doaj +1 more source
(Sub)mm-Wavelength Observations of Pre-Planetary Nebulae and Young Planetary Nebulae
Galaxies, 2020 This is a non-comprehensive review of observations of pre-Planetary Nebulae (pPNe) and young Planetary Nebulae (yPNe) at (sub)mm-wavelengths, a valuable window for probing multi-phased gas and dust in these objects.
Carmen Sánchez Contreras
doaj +1 more source
BINARY CENTRAL STARS OF PLANETARY NEBULAE DISCOVERED THROUGH PHOTOMETRIC VARIABILITY. V. THE CENTRAL STARS OF HaTr 7 AND ESO 330-9 [PDF]
, 2016 We find the central stars (CSs) of the planetary nebulae (PNe) HaTr 7 and ESO 330-9 to be close-binary systems. Both have orbital periods of less than half a day and contain an irradiated cool companion to the hot CS.
T. Hillwig +5 more
semanticscholar +1 more source
Common Envelope Shaping of Planetary Nebulae. IV. From Proto-planetary to Planetary Nebula [PDF]
, 2022 We present 2D hydrodynamical simulations of the transition of a proto-planetary nebula to a planetary nebula for central stars in binary systems that have undergone a common envelope event. After 1,000 yr of magnetically driven dynamics (proto-planetary nebula phase), a line-driven stellar wind is introduced into the computational domain and the ...
arxiv +1 more source
IFU spectroscopy of Southern Planetary Nebulae: III [PDF]
, 2016 In this paper we describe integral field spectroscopic observations of four southern Galactic Planetary Nebulae (PNe), M3-4, M3-6, Hen2-29 and Hen2-37 covering the spectral range, 3400-7000 A.
A. Ali +5 more
semanticscholar +1 more source
Planetary nebula or symbiotic Mira? Near infrared colours mark the difference [PDF]
Astron.Astrophys.377:L18,2001, 2001 Nebulae around symbiotic Miras look very much like genuine planetary nebulae, although they are formed in a slightly different way. We present near infrared photometry of known and suspected symbiotic nebulae obtained with the Deep Near Infrared Southern Sky Survey (DENIS).
arxiv +1 more source