Results 71 to 80 of about 27,938 (255)
37 pages, 25 figures; this is a pre-print of a chapter for the Encyclopedia of Astrophysics (edited by I. Mandel, section editor F.R.N.
De Marco, Orsola +2 more
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, 2008 We present new radial velocity measurements of 586 stars in a one-degree field centered on the open cluster M46, and the planetary nebula NGC 2438 located within a nuclear radius of the cluster.
Aller +45 more
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Clumps in the Planetary Nebulae [PDF]
Symposium - International Astronomical Union, 1993 The effect of density and temperature fluctuations on the intensity of the recombination and collisionally excited lines is investigated.
A. F. Kholtygin, T. Kh. Feklistova
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Spitzer observations of planetary nebulae [PDF]
Proceedings of the International Astronomical Union, 2011 AbstractThe Spitzer Space Telescope has three science instruments (IRAC, MIPS, and IRS) that can take images at 3.6, 4.5, 5.8, 8.0, 24, 70, and 160 μm, spectra over 5–38 μm, and spectral energy distribution over 52–100 μm. The Spitzer archive contains targeted imaging observations for more than 100 PNe.
Chu, You-Hua, Chu, You-Hua
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More evidence for an intracluster planetary nebulae population in the Virgo cluster
, 1997 We surveyed a 50 sq arcmin region in the Virgo cluster core to search for intergalactic planetary nebulae, and found 11 candidates in the surveyed area.
Caon N. +18 more
core +1 more source
Meteoritics &Planetary Science, Volume 60, Issue 3, Page 616-631, March 2025.Abstract Results of microanalysis study of NWA 869 meteorite, an ordinary chondrite, where silicates, Fe‐Ni alloys, and troilite are major constituents, are reported. The presented study of microtextures in metallic and sulfide grains provides information on processes occurring from the asteroid's accretion, through the impacts until cooling.
Paulina Skirak +4 more
wiley +1 more source
Molecular Envelopes of Planetary Nebulae and Proto-Planetary Nebulae [PDF]
International Astronomical Union Colloquium, 1994 As stars evolve up the asymptotic giant branch (AGB), they begin to lose mass at a high rate, and in the process they create extended circumstellar molecular envelopes. Since the transition from AGB to planetary nebula stages is of the order of 1000 yr, the remnant of such molecular envelopes should still be observable in pro to-planetary nebulae (PPN)
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The Spatial and Emission Properties of the Large [O iii] Emission Nebula Near M31
The Astrophysical Journal, 2023 Drechsler et al. reported the unexpected discovery of a 1.°5 long [O iii ] emission nebula 1.°2 southeast of the M31 nucleus. Here we present additional images of this large emission arc, called the Strottner–Drechsler–Sainty Object (SDSO), along with ...
Robert A. Fesen +10 more
doaj +1 more source
Discovery of an OVI Emitting Nebula around the Hot White Dwarf KPD 0005+5106
, 2004 A survey of diffuse interstellar sight lines observed with the Far Ultraviolet Spectroscopic Explorer has led to the serendipitous discovery of a high-ionization nebula around the hot white dwarf KPD 0005+5106.
Birgit Otte +7 more
core +1 more source