The James Webb Space Telescope Mission

Twenty-six years ago a small committee report, building on earlier studies, expounded a compelling and poetic vision for the future of astronomy, calling for an infrared-optimized space telescope with an aperture of at least $4m$. With the support of their governments in the US, Europe, and Canada, 20,000 people realized that vision as the $6.5m$ James Webb Space Telescope. A generation of astronomers will celebrate their accomplishments for the life of the mission, potentially as long as 20 years, and beyond. This report and the scientific discoveries that follow are extended thank-you notes to the 20,000 team members. The telescope is working perfectly, with much better image quality than expected. In this and accompanying papers, we give a brief history, describe the observatory, outline its objectives and current observing program, and discuss the inventions and people who made it possible. We cite detailed reports on the design and the measured performance on orbit.Comment: Accepted by PASP for the special issue on The James Webb Space Telescope Overview, 29 pages, 4 figure

Abstracts from the 8th International Conference on cGMP Generators, Effectors and Therapeutic Implications

This work was supported by a restricted research grant of Bayer AG

Electronic Structure of Metal (M = Au, Pt, Pd, or Ru) Bilayer Modified α-Fe 2

Metal modified metal oxides are promising and economical catalysts for important processes such as CO oxidation and the partial oxidation of methanol. The present work is to investigate, by density functional theory, the electronic and geometric structures of metal (M = Au, Pt, Pd, or Ru) bilayer modified ∞-Fe2O3(0001) catalysts, focusing on the synergistic effect at the interface between the metal bilayer and ∞-Fe2O3( 0001) support and its connection with its catalytic activity. It is found that the synergistic effect is largely dependent on the localized electron gain, electron transfer from Fe atoms to the dz2 orbitals of the metal bilayer, and interfacial metallic/ionic bonding. Such synergistic effect is most pronounced for ∞-Fe2O3 catalysts modified with the Pt or Ru bilayer. The Au bilayer modified ∞-Fe2O3 catalyst is the most stable due to the low structural deformation of ∞-Fe2O3 support, minimal surface Fe atom spin quenching, and long Au-Fe bonds. The ∞-Fe2O3 catalyst modified with Ru bilayer displays the optimal balance of the synergistic effect and structural stability that can enhance catalytic activity