Voyager EUV and FUV Observations
نویسندگان
چکیده
منابع مشابه
Reanalyses of Voyager Ultraviolet Spectrometer Limits to the EUV and FUV Diffuse Astronomical Flux
We re-examine Voyager Ultraviolet Spectrograph data used to establish upper limits to the λ 500–900 Å and λ 900–1100 Å cosmic diffuse background. The measurement of diffuse flux with the Voyager UVS data requires complex corrections for noise sources which are far larger than the astronomical signal. In the analyses carried out to date, the upper limits obtained on the diffuse background show s...
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Voyager 2 has crossed through 20 AU of the heliosheath; assuming the same heliosheath thickness as at Voyager 1, it is now two-thirds of the way to the heliopause. The plasma data are generally of good quality, although the increasing flow angle of the plasma makes analysis more difficult. The average plasma speed has remained constant but the flow angles have increased to almost 60◦ in the RT ...
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We calculate the rate of photoevaporation of a circumstellar disk by energetic radiation (FUV, 6eV < hν <13.6eV; EUV, 13.6eV < hν <0.1keV; and Xrays, hν > 0.1keV) from its central star. We focus on the effects of FUV and X-ray photons since EUV photoevaporation has been treated previously, and consider central star masses in the range 0.3 − 7M⊙. Contrary to the EUV photoevaporation scenario, wh...
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The extreme ultraviolet (EUV) airglow has yet to be studied extensively due to observational difficulties in this range of the spectrum. EURD is an instrument designed to study diffuse EUV radiation flown on the Spanish MINISAT-01 satellite. In this paper we present observations of the terrestrial night airglow as observed from EURD in the range of 400 to 1060 Å. The high sensitivity and high r...
متن کاملObservations of the Diffuse FUV Background with FUSE
We have used observations taken under the FUSE S405/S505 channel realignment program to explore the diffuse FUV (1000 1200 Å) radiation field. Of the 71 independent locations in that program, we have observed a diffuse signal in 32, ranging in brightness from 1600 photons cm sr s Å to a maximum of 2.9× 10 photons cm sr s Å in Orion. The FUSE data confirm that the diffuse FUV sky is patchy with ...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1984
ISSN: 0252-9211
DOI: 10.1017/s0252921100098055