Results 1 to 10 of about 43 (43)

The Next Generation Virgo Cluster Survey. XVII. A Search for Planetary Nebulae in Virgo Cluster Globular Clusters [PDF]

The Astrophysical Journal, 2019
Abstract The occurrence of planetary nebulae (PNe) in globular clusters (GCs) provides an excellent chance to study low-mass stellar evolution in a special (low-metallicity, high stellar density) environment. We report a systematic spectroscopic survey for the [O iii] 5007 Å emission line of PNe in 1469 Virgo GCs and 121 Virgo ultra ...
Weijia Sun, Eric W. Peng, Youkyung Ko, Patrick Côté, Laura Ferrarese, Myung Gyoon Lee, Chengze Liu, Alessia Longobardi, Igor V. Chilingarian, Chelsea Spengler, Ann I. Zabludoff, Hong-Xin Zhang, Jean-Charles Cuillandre, Stephen D. J. Gwyn   +13 more
openaire   +4 more sources

On the Physical Differences Between the Planetary Nebulae of the Galactic Centre Group and the Planetaries of the General Galactic Field [PDF]

Symposium - International Astronomical Union, 1978
The mean physical parameters were estimated for the planetary nebulae of the two groups, regarded as a whole: planetaries of a general Galactic field (GGF), and those, belonging to a large group seen in the Galactic centre direction (CG).
openaire   +1 more source

A New Generation of Photoionization Codes: Three‐dimensional Models. The Bipolar Planetary Nebula IC 4406

The Astrophysical Journal, 1997
A three-dimensional self-consistent photoionization code is developed in order to build more realistic models for asymmetric and/or inhomogeneous photoionized nebulae. With these models the assumption of spherical or plane-parallel symmetry can be dropped and models with various geometries can be treated.
R. Gruenwald, S. M. Viegas, D. Broguiere
openaire   +1 more source

From Flybys to Sample Return: A Review of Space Probes and Robotic Sampling Technologies for Small Bodies

Journal of Field Robotics, EarlyView.
ABSTRACT As a crucial puzzle piece of deep space exploration, exploring small bodies can provide significant scientific insights and valuable mineral resources. Unlike missions to the Moon and Mars, small‐body missions pose distinct technical challenges, including communication delays, weak gravity, and uncertain environments. This paper reviews a full
Xin Zhang, Hao Zhou, Dalin Zhou, Zhaojie Ju   +3 more
wiley   +1 more source

Conceptualising post‐growth to advance corporate sustainability research: A comparative literature review

International Journal of Management Reviews, EarlyView.
Abstract This comparative literature review explores how an expanding body of interdisciplinary post‐growth literature aligns, extends or challenges ecocentric Corporate Sustainability (eCS) research in management (i.e., rooted in systems thinking, emphasising planetary boundaries, ecological limits and embeddedness).
Gianluigi Narciso, Yanfei Hu
wiley   +1 more source

Advanced aqueous alteration in primitive meteorites: Micro‐ to nanoscale studies of CR1 iron sulfides

Meteoritics &Planetary Science, EarlyView.
Abstract This study documents micro‐ to nanoscale observations of primary nebular and secondary parent body iron sulfides in the CR1 GRO 95577. Despite the extensive alteration of the bulk sample, some primary sulfides managed to avoid alteration, having originally formed in the solar nebula during chondrule formation by either fission‐sulfidization or
S. A. Singerling
wiley   +1 more source

Mineralogy, mineral chemistry, and redox equilibria in ten aggregate particles from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract Examination of 10 Bennu aggregate particles has revealed the presence of many phases which taken together can provide constraints on the oxygen fugacity (fO2) of Bennu samples. Phyllosilicates (saponite and serpentine), carbonates, oxides (magnetite, chromite), sulfides (pyrrhotite, pentlandite), phosphate (hydroxyapatite, Na‐Mg‐phosphate ...
K. Righter, J. Gorce, L. Le, K. Thomas‐Keprta, Z.E. Wilbur, L.P. Keller, Z. Gainsforth, T.J. McCoy, T.J. Zega, S.S. Russell, H.C. Connolly Jr., D.S. Lauretta   +11 more
wiley   +1 more source

Origin and formation of a chondritic xenolith in Krymka (LL3.2, breccia): Indications for a late formation of the accretionary breccia

Meteoritics &Planetary Science, EarlyView.
Abstract An unusual chondritic xenolith was found in two sequentially prepared thin sections of a sample from the Krymka (LL3.2) chondrite. The xenolith has a rounded, slightly deformed shape of about 5 mm in apparent diameter and is partially surrounded by a double rim made of an inner fine‐grained silicate‐rich rim and an outer sulfide‐rich rim.
Aelita Girich, Addi Bischoff, Samuel Ebert, Kazuhide Nagashima, Andreas Morlok, Harald Hiesinger, Jasper Berndt   +6 more
wiley   +1 more source

Aggregation and the Structure of Value

Noûs, EarlyView.
ABSTRACT Roughly, the view I call “Additivism” sums up value across time and people. Given some standard assumptions, I show that Additivism follows from two principles. The first says that how lives align in time cannot, in itself, matter. The second says, roughly, that a world cannot be better unless it is better within some period or another.
Weng Kin San
wiley   +1 more source

Decisions Under Radical Uncertainty: The Role of Volitional Liminality in Radical Innovation

Journal of Product Innovation Management, Volume 43, Issue 4, Page 592-615, July 2026.
ABSTRACT Academic Summary Radical innovation management can be understood as an organizational practice that enacts distant futures, which are open‐ended and unknowable. Such radical innovation endeavors are thus characterized by radical uncertainty, where possible futures are not only quantitatively but qualitatively different from the present, and ...
José Antonio Rosa, Marcelo F. de la Cruz Jara, Jelena Spanjol   +2 more
wiley   +1 more source