Results 51 to 60 of about 191,657 (282)
Catalogue of candidate emission-line objects in the Small Magellanic Cloud [PDF]
, 1999 H\alpha and [O III] narrow band, wide field (7 * 7 degree), CCD images of the Small Magellanic Cloud were compared and a catalogue of candidate planetary nebulae and H\alpha emission-line stars was compiled.
Bessell, Michael S., Murphy, Michael T.
core +3 more sources
(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
The dynamics of Planetary Nebulae [PDF]
Symposium - International Astronomical Union, 1997 In this review we focus on new observations and theory that directly pertain to understanding the hydrodynamic evolution of planetary nebulae (PNe). The recent history of the field lead us to break the review into two parts, macroscopic and microscopic structures, since both the size scales and the dominant physics appear to cleave nicely into more-or ...
Bruce Balick, Adam Frank
openaire +2 more sources
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
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
Planetary Nebulae Embryo after a Common Envelope Event
Galaxies, 2018 In the centers of some planetary nebulae are found close binary stars. The formation of those planetary nebulae was likely through a common envelope event, which transformed an initially-wide progenitor binary into the currently observed close binary ...
Natalia Ivanova, Jose L. A. Nandez
doaj +1 more source
Molecules in planetary nebulae [PDF]
The Astrophysical Journal, 1978 The study of molecules in planetary nebulae is still in its infancy; therefore, it is appropriate both to review existing knowledge and to anticipate developments that will arise as the subject matures. Briefly stated, this subject consists of observations of hydrogen, H2, and carbon monoxide, CO, molecules in a very few nebulae; the tentative ...
openaire +2 more sources
On the Origin of Planetary Nebulae [PDF]
Publications of the Astronomical Society of the Pacific, 1966 [No abstract]
Abell, G. O., Goldreich, P.
openaire +4 more sources
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