Astrophysics (Index)About

radio source

(RS, source)
(astronomical object producing observable radio)

A radio source (RS, and within radio astronomy, sometimes just the word, source) is an object, or a location in the celestial sphere from which radio is detected. The term radio source avoids interpretation (i.e., any declaration what kind of object is producing the radio), though it is also often used even when a certain type of source is assumed. The Sun, Jupiter, and the galactic center are sources. Some other source types:

In the case of galaxies, the word "source" may be used to indicate the location within the galaxy or adjacent to the galaxy (as in the case of radio stemming from jets) from which the radio signal is observed.

The terms extended source versus point source or unresolved source indicate whether it is resolved. The term giant radio source (GRS) may refer to the physical size of the source, which generally assumes at least some notion of the distance, or possibly may be based on the angular area across the celestial sphere.

The term GHz-peaked spectrum (GPS) refers to some extragalactic sources showing a peak in the gigahertz (microwave) range. They are presumed to be a type of active galactic nucleus (AGN).

Analogous terms are used for other bands, such as microwave source, infrared source (IR source), ultraviolet source (UV source), X-ray source, and gamma-ray source, and within context, the word source may mean any one of these.


(radio,object type)
Further reading:
https://en.wikipedia.org/wiki/Astronomical_radio_source
https://en.wiktionary.org/wiki/radio_source
https://dictionary.obspm.fr/index.php?formSearchTextfield=radio+source&showAll=1
https://www.britannica.com/science/radio-source

Referenced by pages:
1 Jansky Empty Field Survey (1 Jy)
3C 273
3C 327
3C 348
3C 397
87GB Catalog of Radio Sources (87GB)
ALFALFA
angular resolution
Arecibo Occultation Survey (AO)
Badgerys Creek Interferometer 101-MHz Survey (Mills)
Becker, White, and Edwards Catalog (BWE)
black hole (BH)
Bologna Survey of Radio Sources
brightness temperature (TB)
Canadian Hydrogen Intensity Mapping Experiment (CHIME)
Cosmic Lens All-sky Survey (CLASS)
counterpart
CRATES
Cygnus A (3C 405)
Cygnus Loop
Dominion Observatory 10.03 MHz Source Catalog (DB)
Dominion Observatory 1420 MHz Source Catalog (DA)
Dominion Radio Astrophysical Observatory (DRAO)
Fanaroff-Riley classification
Faraday rotation
flux density
Fourth Cambridge Catalog of Radio Sources (4C)
FRB121102
G1.9+0.3
galactic coordinate system (GCS)
galaxy cluster (CL)
Gould's Belt Distances Survey (GOBELINS)
Green Bank 6-cm Radio Source Catalog (GB6)
interferometer
International Celestial Reference System (ICRS)
Molonglo Reference Catalog (MRC)
MSH Catalog (MSH)
NRAO Catalog (NRAO)
NRAO VLA Sky Survey (NVSS)
occultation observations
Ohio Radio Survey (OSS)
pulsar (PSR)
quasar (QSO)
radio source counts
radio star
radio telescope
rare designator prefixes
Sag A*
signal-to-noise ratio (SNR)
SN 1572
source
spectral correlator
spectral flux density (S)
Spektr-R
Strong Source Surveys
Texas Survey of Radio Sources at 365 MHz (TXS)
Third Cambridge Catalogue of Radio Sources (3C)
transit telescope
USS Sources
VERA
very-long-baseline interferometry (VLBI)
visible light
VLASS
W51
Westerbork Synthesis Radio Telescope (WSRT)
Westerhout Radio Survey (W)
Wilkinson Microwave Anisotropy Probe (WMAP)
young stellar object (YSO)

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