Results 41 to 50 of about 239,171 (281)
Turbulence in the Orion Nebula [PDF]
International Astronomical Union Colloquium, 1989 We have examined the radial and turbulent velocities of the Orion Nebula at the seeing limit, observing the [OIII]λ5007 line and the [OII]λ3727 doublet with the coudé feed system of the Kitt Peak National Observatory, at very high spatial and spectral resolution.
C. R. O’Dell, H. O. Castañeda
openaire +2 more sources
Prussian Blue: Chemistry, Commerce, and Colour in Eighteenth‐Century Paris
Art History, Volume 46, Issue 1, Page 154-186, February 2023., 2023 This essay reconsiders the story of a pigment. Prussian blue, discovered at the beginning of the eighteenth century, is often described as a revolutionary colour that instantly transformed painters’ palettes and practices. Grounded in a ‘thick description’ of the pigment's history in Paris, this article challenges the legendary account of Prussian blue
Charlotte Guichard +2 more
wiley +1 more source
Odessa Astronomical Publications, 2020 Recombination radio lines (RRLs) of hydrogen (H), helium (He-4), and carbon (C) are a powerful tool for studying the interstellar medium (ISM) in space.
A. P. Tsivilev
doaj +1 more source
Intrusive Magmatism Strongly Contributed to the Volatile Release Into the Atmosphere of Early Earth
Geochemistry, Geophysics, Geosystems, Volume 23, Issue 12, December 2022., 2022 Abstract Magmatic volatile release was crucial for the build‐up and composition of the early atmosphere and thus for the origin and evolution of life. Even though the rate of intrusive to extrusive magma production on Earth is high, intrusive volatile release is commonly neglected in studies modeling the composition of the early atmosphere.
Sara Vulpius, Lena Noack
wiley +1 more source
Deciphering the 3D Orion Nebula-I: Expanding Shells in the Huygens Region [PDF]
Astrophysical Journal, 2020 Based on imaging and spectroscopic data, we develop a 3D model for the Huygens Region of the Orion Nebula. Ori C, the hottest star in the Trapezium, is surrounded by a wind-blown Central Bubble that opens SW into the Extended Orion Nebula.
C. O’Dell, N. Abel, G. Ferland
semanticscholar +1 more source
Iron Hydride in the Earth's Inner Core and Its Geophysical Implications
Geochemistry, Geophysics, Geosystems, Volume 23, Issue 12, December 2022., 2022 Abstract Hydrogen is potentially a key light element in the Earth's core. Determining the stability of iron hydride is essential for Earth's core mineralogy applications. We investigated the thermal stabilities of a range of Fe‐H binaries at core P‐T conditions. It is concluded that face‐centered cubic phase FeH is stable in the Earth's inner core. The
Hua Yang, Joshua M. R. Muir, Feiwu Zhang
wiley +1 more source
Cloud fragmentation and proplyd-like features in HII regions imaged by HST [PDF]
, 2006 We have analyzed HST ACS and WFPC2 new and archival images of eight HII regions to look for new proto-planetary disks (proplyds) similar to those found in the Orion Nebula.
Allen D. A. +13 more
core +1 more source
A New Look at the Molecular Gas in M42 and M43: Possible Evidence for Cloud–Cloud Collision that Triggered Formation of the OB Stars in the Orion Nebula Cluster [PDF]
Astrophysical Journal, 2017 The Orion Nebula Cluster toward the H ii region M42 is the most outstanding young cluster at the smallest distance (410 pc) among the rich high-mass stellar clusters.
Y. Fukui +12 more
semanticscholar +1 more source
Hubble Space Telescope Astrometry in the Orion Nebula Cluster: Census of Low-mass Runaways [PDF]
Astronomical Journal, 2020 We present a catalog of high-precision proper motions in the Orion Nebula Cluster (ONC), based on Treasury Program observations with the Hubble Space Telescope’s (HST) ACS/WFC camera.
I. Platais +8 more
semanticscholar +1 more source
Secular Evolution of Continents and the Earth System
Reviews of Geophysics, Volume 60, Issue 4, December 2022., 2022 Abstract Understanding of secular evolution of the Earth system is based largely on the rock and mineral archive preserved in the continental lithosphere. Based on the frequency and range of accessible data preserved in this record, we divide the secular evolution into seven phases: (a) “Proto‐Earth” (ca. 4.57–4.45 Ga); (b) “Primordial Earth” (ca. 4.45–
Peter A. Cawood +6 more
wiley +1 more source