The Herschel-Heterodyne Instrument for the Far-Infrared (HIFI)
نویسندگان
چکیده
منابع مشابه
THz Instrumentation for the Herschel Space Observatory's Heterodyne Instrument for Far Infrared
The Heterodyne Instrument for Far Infrared (HIFI) on ESA's Herschel Space Observatory utilizes a variety of novel RF components in its five SIS receiver channels covering 4801250 GHz and two HEB receiver channels covering 14101910 GHz. The local oscillator unit will be passively cooled while the focal plane unit is cooled by superfluid helium and cold helium vapors. HIFI employs W-band GaAs amp...
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Highly compensated Ge:Ga photoconductors have been fabricated and evaluated for high bandwidth heterodyne detection. Bandwidths up to 60 MHz have been obtained with corresponding current responsivity of 0.01 A/W.
متن کاملThe far - infrared / radio correlation as probed by Herschel ⋆
We set out to determine the ratio, qIR, of rest-frame 8–1000-μm flux, SIR, to monochromatic radio flux, S1.4GHz, for galaxies selected at far-infrared (-IR) and radio wavelengths, to search for signs that the ratio evolves with redshift, luminosity or dust temperature, Td, and to identify any far-IR-bright outliers – useful laboratories for exploring why the far-IR/radio correlation (FIRRC) is ...
متن کاملThe far-infrared/radio correlation as probed by Herschel*
We set out to determine the ratio, qIR, of rest-frame 8–1000-μm flux, S IR, to monochromatic radio flux, S 1.4 GHz, for galaxies selected at far-infrared (IR) and radio wavelengths, to search for signs that the ratio evolves with redshift, luminosity or dust temperature, Td, and to identify any farIR-bright outliers – useful laboratories for exploring why the far-IR/radio correlation (FIRRC) is...
متن کاملThe effect of sideband ratio on line intensity for Herschel/HIFI
The Heterodyne Instrument for the Far Infrared (HIFI) on board the Herschel Space Observatory is composed of a set of fourteen double sideband mixers. We discuss the general problem of the sideband ratio (SBR) determination and the impact of an imbalanced sideband ratio on the line calibration in double sideband heterodyne receivers. The HIFI SBR is determined from a combination of data taken d...
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ژورنال
عنوان ژورنال: EAS Publications Series
سال: 2008
ISSN: 1633-4760,1638-1963
DOI: 10.1051/eas:0934001