Results 81 to 90 of about 4,999 (221)

The effect of terrestrial weathering on the mineralogy and petrologic (sub)types of CM chondrites explored by kinetic modeling and laboratory experiments

Meteoritics &Planetary Science, Volume 61, Issue 5, Page 874-897, May 2026.
Abstract Terrestrial weathering alters the chemical and isotopic composition, and mineralogy, of meteorites; its effects on ordinary chondrites are well‐studied, but relatively little is known about the susceptibility of carbonaceous chondrites. We combined laboratory experiments, whereby Chwichiya 002 (C3‐ung find), Murchison (CM2 fall) and Kolang ...
Robin L. Haller, Martin R. Lee, Mark E. Hodson   +2 more
wiley   +1 more source

First Release of the IPHAS Catalogue of Extended Planetary Nebulae

, 2013
Following a vast search for extended Planetary Nebulae (PNe) in the Galactic Plane using IPHAS, we present the first release of the "IPHAS Catalogue of Extended Nebulae".
Zijlstra, A, Morris, RAH, Guerrero, M, Collaboration, I, Mampaso, A, Frew, DJ, Sabin, L, Corradi, R, Parker, QA, Guzman-Ramirez, L   +9 more
core  

Interacting planetary nebulae

, 2012
We discuss the classification and orientation of planetary nebulae that interact with the interstellar medium throughout the Milky Way. A sample of 117 confirmed interacting planetary nebulae is used for this purpose.
H. M. Basurah, A. Ali, L. Sabin, S. Snaid   +3 more
core   +1 more source

Discovering Planetary Nebula Geometries: Explorations with a Hierarchy of Models

, 2004
Astronomical objects known as planetary nebulae (PNe) consist of a shell of gas expelled by an aging star. In cases where the gas shell can be assumed to be ellipsoidal, the PN can be easily modeled in three spatial dimensions.
Knuth, Kevin H., Schumann, Johann, Granquist-Fraser, Domhnull, Fischer, Bernd, Huyser, Karen A., Hajian, Arsen R.   +5 more
core  

A morphological study of planetary nebulae

, 1998
We have produced simulated images of 110 planetary nebulae using the ellipsoidal shell model. This process has allowed us to remove the projection effects from the morphological classification of planetary nebulae and has provided quantitative measures ...
C. Y. Zhang, Kwok, S, S. Kwok, Zhang, CY
core   +1 more source

Symmetric and asymmetric planetary nebulae and the time variation of the radial abundance gradients

, 2013
Planetary nebulae (PN) are excellent laboratories to study the chemical evolution of their host galaxies, especially concerning the radial abundance gradients and their time and spatial variations.
Maciel, Walter Junqueira
core  

Stellar evolution from AGB to planetary nebulae [PDF]

, 2008
Planetary nebulae are formed by an interacting winds process where the remnant of the AGB wind is compressed and accelerated by a later-developed fast wind from the central star.
Kwok, S
core   +1 more source

Close Binaries and the Abundance Discrepancy Problem in Planetary Nebulae

Galaxies, 2018
Motivated by the recent establishment of a connection between central star binarity and extreme abundance discrepancies in planetary nebulae, we have carried out a spectroscopic survey targeting planetary nebula with binary central stars and previously ...
R. Wesson, D. Jones, J. García-Rojas, H. M. J. Boffin, R. L. M. Corradi   +4 more
doaj   +1 more source

New Close Binary Central Stars of Planetary Nebulae from Gaia DR3 Epoch Photometry. [PDF]

Res Notes AAS, 2022
Chornay N, Walton NA.
europepmc   +1 more source

A new [OIII] lambda5007 Å Galactic Planetary Nebulae Luminosity Function

, 2010
The Planetary Nebulae Luminosity Function (PNLF) describes the collective luminosity evolution for a given population of Planetary Nebulae (PN). A major paradox in current PNLF studies is in the universality of the absolute magnitude of the brightest PNe
Miszalski, B, Kovacevic, AV, Jacoby, GH, Parker, QA   +3 more
core