Far infrared astronomy
نویسندگان
چکیده
منابع مشابه
Low-background Far-infrared Telescope for Balloon-borne Infrared Astronomy
The design and performance of a new type of far-infrared telescope is discussed. The instrument is only 20cm in diameter, but its performance exceeds that of other telescopes at lOOp. The performance of far-infrared telescopes is limited not only by size but also by design and environment. The 30cm infrared telescope flown in the Nasa-Ames Lear Jet (Aumann, Low and Gillespie 1970) was limited b...
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We present a low noise SIS mixer developed for the 1.2 THz band of the heterodyne spectrometer of the Herschel Space Observatory. The device of this design will be among the first SIS mixers flown in space at Herschel. The developed SIS mixer has a quasi-optical design, with a double slot planar antenna and an extended spherical lens made of pure Si. The SIS junctions are Nb/AlN/NbTiN with the ...
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We examined the sky confusion noise in 40 sky regions by analysing 175 far-infrared (90–200 µm) maps obtained with ISOPHOT, the photometer on-board the Infrared Space Observatory. For cirrus fields with B > 5 MJysr −1 the formula based on IRAS data (Helou & Be-ichman, (1990)) predicts confusion noise values within a factor of 2 to our measurements. The dependence of the sky confusion noise on t...
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We revisit the nature of the far infrared (FIR)/Radio correlation by means of the most recent models for star forming galaxies, focusing in particular on the case of obscured starbursts. We model the IR emission with our population synthesis code, GRASIL (Silva et al. 1998). As for the radio emission, we revisit the simple model of Condon & Yin (1990). We find that a tight FIR/Radio correlation...
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ژورنال
عنوان ژورنال: Nature
سال: 1975
ISSN: 0028-0836,1476-4687
DOI: 10.1038/256458b0