Results 41 to 50 of about 335 (184)
Spectroscopic Survey of Faint Planetary-nebula Nuclei. IV. The A35-type Central Star of Pa 27
The Astrophysical JournalWe present optical spectroscopy of the 12th-magnitude central star of the planetary nebula (PN) Patchick 27 (Pa 27), obtained during a survey of faint PN nuclei (PNNs) with the Low-Resolution Spectrograph of the Hobby–Eberly Telescope.
Howard E. Bond, Gregory R. Zeimann
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Constraints on Noble Gas Variability in OIB and MORB From Non‐Equilibrium Magmatic Degassing Models
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.Abstract Noble gas concentrations in ocean island basalts (OIB) and mid‐ocean ridge basalts (MORB) are affected by degassing processes, obscuring their pre‐eruptive characteristics. Degassing corrections commonly assume near‐equilibrium partitioning of noble gases between melt and vapor.
Thomas Williams +2 more
wiley +1 more source
The ionization of galaxies by their planetary nebulae
, 2011 International audienceRecent studies have shown that nuclei of planetary nebulae and their remnants (dubbed HOLMES for ``hot low-mass evolved stars'') can easily explain two long-standing problems of extragalactic astronomy: the observed emission-line ...
Stasinska, Grazyna
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Formation of Asteroid (16) Psyche by a Giant Impact
Journal of Geophysical Research: Planets, Volume 131, Issue 1, January 2026.Abstract Asteroid (16) Psyche is the largest likely metal‐rich asteroid in the Solar System and the target of the NASA Psyche mission. The mission aims to determine whether the asteroid is the core of a differentiated planetesimal that lost its mantle via a giant impact.
Saverio Cambioni +14 more
wiley +1 more source
Meteoritics &Planetary Science, Volume 61, Issue 1, Page 122-139, January 2026.Abstract The O‐, N‐, Mo‐, Ru‐, Os‐, Cr‐, Ti‐, Ni‐, Fe‐, Nd‐, Ca‐, Zn‐, Sr‐, and Mg‐isotopic compositions of enstatite chondrites are essentially identical to those of the Earth and Moon. These correspondences suggest enstatite chondrites formed at ≈1 AU as the only known chondrite groups that accreted in the vicinity of a major planet. Bulk Earth has a
Alan E. Rubin
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Planetary Nebulae and How to Observe Them
, 2012 Astronomers' Observing Guides provide up-to-date information for amateur astronomers who want to know all about what is it they are observing. This is the basis of the first part of the book.
Griffiths, Martin
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The Astrophysical JournalA consensus has been reached in recent years that binarity plays an important role in the formation and evolution of a significant fraction of planetary nebulae (PNe).
Pinjian Chen +3 more
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Physiology of nitrogen: A life or death matter
Experimental Physiology, Volume 111, Issue 1, Page 270-282, 1 January 2026.Abstract With each breath, four out of every five molecules we inspire are nitrogen (N2), since this gas constitutes ∼80% of the atmospheric air that surrounds us. Despite its abundance and unlike molecular oxygen, N2 has traditionally held less appeal among physiologists given its lack of reactivity and corresponding inability to support combustion or
Damian M. Bailey +2 more
wiley +1 more source
Determination of mass-loss rates of planetary nebulae nuclei using the first order moment of P Cygni line profiles. [PDF]
, 1986 The authors conclude that the mass-loss rates of planetary nebulae nuclei derived by Cerruti-Sola, Perinotto (1985) have been systematically underestimated by one or nearly two orders of ...
Surdej, Jean, Hutsemekers, Damien
core
The Astronomical JournalPlanetary nebulae (PNe) shown to be members of star clusters provide information on their properties and evolutionary histories that cannot be determined for PNe in the field, in particular the initial masses of their progenitor stars.
Andrea Bellini +2 more
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