Results 121 to 130 of about 33,843 (285)
The 2023 Flight of the Faint Intergalactic-medium Redshifted Emission Balloon
The Astrophysical Journal Supplement SeriesThe second iteration of the Faint Intergalactic-medium Redshifted Emission Balloon (FIREBall-2) is a UV multiobject spectrograph designed to detect emission from the circumgalactic and circumquasar medium at low redshifts ( z < 1).
Drew M. Miles +36 more
doaj +1 more source
Autonomous spectrographic system to analyse the main elements of fireballs and meteors
Earth, Planets and Space, 2018 We present a meteor observation system based on imaging CCD cameras, wide-field optics and a diffraction grating. This system is composed of two independent spectrographs with different configurations, which allows us to capture images of fireballs and ...
Francisco Ángel Espartero +4 more
doaj +1 more source
Diagnosing GRB Prompt Emission Site with Spectral Cut-Off Energy
, 2007 The site and mechanism of gamma-ray burst (GRB) prompt emission is still unknown. Although internal shocks have been widely discussed as the emission site of GRBs, evidence supporting other emission sites have been also suggested recently, including the ...
Bing Zhang +4 more
core +1 more source
Rise of the south: How Arab‐led maritime trade transformed China, 671–1371 CE
Asia‐Pacific Economic History Review, Volume 65, Issue 1, Page 3-38, March 2025.Abstract China's center of socioeconomic activities was in the North prior to the Tang dynasty but is in the South today. We demonstrate that Arab and Persian Muslim traders triggered that transition when they came to China in the late seventh century, by lifting maritime trade along the South Coast and re‐creating the South.
Zhiwu Chen, Zhan Lin, Kaixiang Peng
wiley +1 more source
Events in the life of a cocoon surrounding a light, collapsar jet
, 2002 According to the collapsar model, gamma-ray bursts are thought to be produced in shocks that occur after the relativistic jet has broken free from the stellar envelope.
A. Celotti +4 more
core +1 more source
Writing about a Prime Minister: Reflections on How Malcolm Fraser PM Happened
Australian Journal of Politics &History, EarlyView.In 1989 I published Malcolm Fraser PM, a study of the way that prime minister Fraser worked. In this note I muse about the back story, about the processes involved in writing a study of a recently defeated prime minister, explaining how the book was written and what could be learnt from the interactions with Fraser.
Patrick Weller
wiley +1 more source
The Astrophysical Journal LettersThe spectral properties of a composite thermal emission arising from a relativistic expanding fireball can be remarkably different from the Planck function.
Soumya Gupta, Sunder Sahayanathan
doaj +1 more source
Measurements of fireball onset
Physics of Plasmas, 2018 Laser-based measurements of the characteristic features of fireball onset and stabilization in response to a stepped voltage applied to an anode immersed in a low pressure (100 mTorr) helium afterglow are reported. These include spatial and temporal evolution of metastable species, electron density, and electric field magnitude as measured by planar ...
Scheiner, Brett +4 more
openaire +2 more sources
Creativity and Innovation Management, EarlyView.ABSTRACT This paper explores the limits of mission‐directed entrepreneurial states by drawing on the theory of recombinant innovation and F.A. Hayek's insights on the spontaneous growth of knowledge in society. First, the use of discretionary policymaking curtails the range of knowledge generated in the process of social interaction, limiting the scope
Bryan Cheang, Praharsh Mehrotra
wiley +1 more source