5,702 research outputs found

    Report on Ornithology

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    Inaugural Address of the President

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    Corresponding Secretary\u27s Report for the Years 1878-9

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    Report of Ornithology for 1877

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    Report of Ornithology

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    General Orders No. 49, Florida Soldier and Citizens must Surrender Captured Horses, Jacksonville, Florida

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    General Orders No. 49, Florida Soldier and Citizens must Surrender Captured Horses, Jacksonville, Florida; August 28, 186

    Hydrogen Two-Photon Continuum Emission from the Horseshoe Filament in NGC 1275

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    Far ultraviolet emission has been detected from a knot of Halpha emission in the Horseshoe filament, far out in the NGC 1275 nebula. The flux detected relative to the brightness of the Halpha line in the same spatial region is very close to that expected from Hydrogen two-photon continuum emission in the particle heating model of Ferland et al. (2009) if reddening internal to the filaments is taken into account. We find no need to invoke other sources of far ultraviolet emission such as hot stars or emission lines from CIV in intermediate temperature gas to explain these data.Comment: 9 pages, 8 figures. Accepted for publication in MNRA
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