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
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
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
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
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
(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
H 2 in low-ionization structures of planetary nebulae [PDF]
, 2016 We report the detection of near-IR H$_2$ emission from the low-ionization structures (knots) in two planetary nebulae. The deepest ever, high-angular resolution H$_2$ 1-0 S(1) at 2.122$\mu$, H$_2$ 2-1 S(1) at 2.248$\mu$ and Br$\gamma$ images of K 4-47 ...
S. Akras +2 more
semanticscholar +1 more source
A search for hydrogenated fullerenes in fullerene-containing planetary nebulae [PDF]
, 2016 Detections of C60 and C70 fullerenes in planetary nebulae (PNe) of the Magellanic Clouds and of our own Galaxy have raised the idea that other forms of carbon such as hydrogenated fullerenes (fulleranes like C60H36 and C60H18), buckyonions, and carbon ...
J. J. D'iaz-Luis +3 more
semanticscholar +1 more source
Planetary nebulae in the Small Magellanic Cloud [PDF]
, 2016 We analyse the planetary nebulae (PNe) population of the Small Magellanic Cloud (SMC), based on evolutionary models of stars with metallicities in the range $10^{-3} \leq Z \leq 4\times 10^{-3}$ and mass $0.9 M\odot < M < 8M\odot$, evolved through the ...
P. Ventura +5 more
semanticscholar +1 more source
The Hα surface brightness–radius relation: a robust statistical distance indicator for planetary nebulae [PDF]
, 2015 Measuring the distances to Galactic planetary nebulae (PNe) has been an intractable problem for many decades. We have now established a robust optical statistical distance indicator, the Hα surface brightness–radius or SHα–r relation, which addresses ...
D. Frew +7 more
semanticscholar +1 more source