Results 141 to 150 of about 4,018,158 (274)

Evolution and Mass Distribution of Central Stars of Planetary Nebulae [PDF]

, 1983
D. Schoênberner, V. Weidemann
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Ultra–Efficient and Selective Gold Separation via Second–Sphere Coordination of Aurous Dihalide Using a Nonporous Amorphous Superadsorbent

Advanced Science, EarlyView.
A covalent organic superphane cage serves as a nonporous amorphous superadsorbent for highly efficient and selective gold separation. This material uniquely captures linear aurous dihalide ions, achieving exceptional uptake capacity and selectivity, and proving effective even in seawater, offering a scalable, eco–friendly solution to gold scarcity ...
Wei Zhou, Xiao Cai, Yiyao Xu, Min Zhou, Jialian Li, Qiang Liu, Qing He   +6 more
wiley   +1 more source

X-ray Shaping of Planetary Nebulae

Galaxies, 2018
The stellar winds of the central stars of planetary nebulae play an essential role in the shaping of planetary nebulae. In the interacting stellar winds model, the fast stellar wind injects energy and momentum, which are transferred to the nebular ...
Martín A. Guerrero
doaj   +1 more source

Disks around young free-floating planetary-mass objects: Ultradeep Spitzer imaging of IC348 [PDF]

arXiv
Protoplanetary disks have been found around free-floating objects with masses comparable to those of giant planets. The frequency and properties of these disks around planetary-mass objects are still debated. Here we present ultradeep mid-infrared images for the young cluster IC348, obtained through stacking of time series images from Spitzer.
arxiv  

A Powerful Method for Deriving Mass-Loss Rates from Planetary Nebulae and Other Objects: The First Order Moment W₁ of Unsaturated P Cygni Line Profiles [PDF]

, 1983
Jean Surdej
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Overcoming Extreme Ammonia Inhibition on Methanogenesis by Artificially Constructing a Synergistically Community with Acidogenic Bacteria and Hydrogenotrophic Archaea

Advanced Science, EarlyView.
This study proposes a two‐step biological strategy to synergistically enhance the three stages of anaerobic digestion, ultimately eliminating the extreme ammonia inhibition and breaking through the inefficiency bottleneck of conventional biotechnology.
Heng Wu, Huaiwen Zhang, Taili Dong, Zhenyu Li, Xiaohui Guo, Heyu Chen, Yiqing Yao   +6 more
wiley   +1 more source

Mass-loss rates and C/He ratios in the winds of the WC central stars of planetary nebulae [PDF]

, 1993
J. A. de Freitas Pacheco, R. D. D. Costa, F. X. de Araújo, D. Petrini   +3 more
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A Soft‐Soft Contact Triboelectric Nanogenerator with a Ternary Four‐Phase Structure for Self‐Powered High‐Efficiency Dust Removal on Mars

Advanced Science, EarlyView.
The frequent dust storms and charged dust particles on Mars pose significant challenges to the power generation efficiency and service life of solar panels during exploration missions. This paper proposes a novel wind‐driven ternary four‐phase soft‐soft contact triboelectric nanogenerator (FPS‐TENG) for dust removal.
Fei Yang, Zheping Wang, Boyi Xu, Yifan Lu, Xuyan Hou, Jinsui Xu, Zhijie Xie   +6 more
wiley   +1 more source

Tilted Circumbinary Planetary Systems as Efficient Progenitors of Free-floating Planets

The Astrophysical Journal Letters
The dominant mechanism for generating free-floating planets has so far remained elusive. One suggested mechanism is that planets are ejected from planetary systems due to planet–planet interactions.
Cheng Chen, Rebecca G. Martin, Stephen H. Lubow, C. J. Nixon   +3 more
doaj   +1 more source

EROS and MACHO Combined Limits on Planetary-Mass Dark Matter in the Galactic Halo [PDF]

, 1998
C. Alcock, R. A. Allsman, D. R. Alves, R. Ansari, É. Aubourg, T. S. Axelrod, P. Bareyre, Jean‐Philippe Beaulieu, A. C. Becker, D. P. Bennett, S. Bréhin, F. Cavalier, S. Char, K. H. Cook, R. Ferlet, J. Fernandez, K. C. Freeman, K. Griest, P. Grison, M. Gros, C. Gry, J. Guibert, M. Lachièze-Rey, B. Laurent, M. J. Lehner, É. Lesquoy, C. Magneville, S. L. Marshall, É. Maurice, A. Milsztajn, D. Minniti, M. Moniez, O. Moreau, L. Moscoso, N. Palanque‐Delabrouille, B. A. Peterson, M. R. Pratt, L. Prévôt, F. Quéinnec, P. J. Quinn, C. Renault, J. Rich, M. Spiro, C. W. Stubbs, William J. Sutherland, A. Tomaney, T. Vandehei, A. Vidal‐Madjar, L. Vigroux, S. Zylberajch   +49 more
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