jansky
Sign in to saveThe jansky (symbol Jy, plural janskys) is a non-SI unit of spectral flux density, or spectral irradiance, used especially in radio astronomy. It is equivalent to 10−26 watts per square metre per hertz.
Key facts
- Unit.name
- jansky
- Unit.standard
- non-SI metric unit
- Unit.quantity
- spectral flux density
- Unit.symbol
- Jy
- Unit.namedafter
- Karl Guthe Jansky
- Unit.units1
- SI units
- Unit.units2
- CGS units
via Wikipedia infobox
Wikidata facts
- Named after
- Karl Guthe Jansky
Show 2 more facts
- unit symbol
- Jy
- conversion to SI unit
- 0.00000000000000000000000001
Sources (2)
via Wikidata · CC0
~6 min read
Encyclopedic overview
7 sectionsContents
- Unit conversions
- AB magnitude
- dBW·m<sup>−2</sup>·Hz<sup>−1</sup>
- Temperature units
- Usage
- Orders of magnitude
- References
The jansky (symbol Jy, plural janskys) is a non-SI unit of spectral flux density, or spectral irradiance, used especially in radio astronomy. It is equivalent to 10−26 watts per square metre per hertz.
The spectral flux density or monochromatic flux, , of a source is the integral of the spectral radiance, , over the source solid angle: S = \iint\limits_\text{source} B(\theta,\phi) \,\mathrm{d}\Omega.
Excerpted from Wikipedia’s “jansky” article, available under the CC BY-SA 4.0 licence.