Results 11 to 20 of about 212,521 (235)
Confirmation of the link between central star binarity and extreme abundance discrepancy factors in planetary nebulae [PDF]
Monthly notices of the Royal Astronomical Society, 2018 It has recently been noted that there seems to be a strong correlation between planetary nebulae with close binary central stars, and highly enhanced recombination line abundances.
R. Wesson +4 more
semanticscholar +1 more source
Binary Central Stars of Planetary Nebulae
Galaxies, 2020 It is now clear that a vast majority of intermediate-mass stars have stellar and/or sub-stellar companions, therefore it is no longer appropriate to consider planetary nebulae as a single-star phenomenon, although some single, isolated stars may well ...
David Jones
doaj +1 more source
The survey of planetary nebulae in Andromeda (M 31) [PDF]
Astronomy & Astrophysics, 2019 Context.The age–velocity dispersion relation is an important tool to understand the evolution of the disc of the Andromeda galaxy (M 31) in comparison with the Milky Way.Aims.We use planetary nebulae (PNe) to obtain the age–velocity dispersion relation ...
S. Bhattacharya +9 more
semanticscholar +1 more source
A new radio molecular line survey of planetary nebulae [PDF]
Astronomy & Astrophysics, 2019 Certain planetary nebulae (PNe) contain shells, filaments, or globules of cold gas and dust whose heating and chemistry are likely driven by UV and X-ray emission from their central stars and from wind-collision-generated shocks.
J. Bublitz +5 more
semanticscholar +1 more source
Properties of central stars of planetary nebulae with distances in Gaia DR2 [PDF]
Astronomy & Astrophysics, 2019 Context. We have compiled a catalogue of central stars of planetary nebulae (CSPN) with reliable distances and positions obtained from Gaia Data Release 2 (DR2) astrometry.
I. González-Santamaría +4 more
semanticscholar +1 more source
Shaping of Planetary Nebulae by Exoplanets
Galaxies, 2020 (1) Background: We investigate the hypothesis that exoplanet engulfment can help explain the observed non-spherical planetary nebula population, as a complementary shaping mechanism to the binary hypothesis.
Nicola Keaveney +2 more
doaj +1 more source
Common Envelope Shaping of Planetary Nebulae [PDF]
Astrophysical Journal, 2018 The morphology of planetary nebulae emerging from the common envelope phase of binary star evolution is investigated. Using initial conditions based on the numerical results of hydrodynamical simulations of the common envelope phase, it was found that ...
G. García-Segura, P. Ricker, R. Taam
semanticscholar +1 more source
Observing the signatures of AGB s-process nucleosynthesis in planetary nebulae: An origins story
Frontiers in Astronomy and Space Sciences, 2022 I relate an anecdotal history of the beginnings of a new initiative in studies of the chemical composition of planetary nebulae: namely, investigating abundances of elements beyond the iron-peak through infrared spectroscopy.
Harriet L. Dinerstein
doaj +1 more source
Galactic Planetary Nebulae as Probes of Radial Metallicity Gradients and Other Abundance Patterns [PDF]
Astrophysical Journal, 2018 We use planetary nebulae (PNe) as probes to determine the Galactic radial oxygen gradients and other abundance patterns. We select data homogeneously from recent data sets, including PNe at large Galactocentric distances.
L. Stanghellini, M. Haywood
semanticscholar +1 more source
Extended Structures of Planetary Nebulae Detected in H2 Emission [PDF]
Astrophysical Journal, 2018 We present narrowband near-infrared images of a sample of 11 Galactic planetary nebulae (PNe) obtained in the H2 2.122 μm and Brγ 2.166 μm emission lines and the Kc 2.218 μm continuum.
X. Fang +6 more
semanticscholar +1 more source