Background radiation

Cosmic background radiation

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Background radiation

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Astronomy 01 Entry

Background radiation

CMBR dipole anisotropy

From the CMB data it is seen that our local group of

galaxies (the galactic cluster that includes the Solar

System's Milky Way Galaxy) appears to be moving at

627±22 km/s relative to the reference frame of the CMB

(also called the CMB rest frame, or the frame of

reference in which there is no motion through the CMB)

in the direction of galactic longitude l = 276±3°,

b = 30±3°.[60] This motion results in an anisotropy of

the data (CMB appearing slightly warmer in the direction

of movement than in the opposite direction).[61] The

standard interpretation of this temperature variation is

a simple velocity redshift and blueshift due to motion

relative to the CMB, but alternative cosmological models

can explain some fraction of the observed dipole

temperature distribution in the CMB.[62]

Uredigeret Google-oversættelse heraf:

CMBR dipol anisotropi

Fra CMB data ses det, at vores lokale gruppe af

galakser (det galaktiske klynge, der inkluderer Solar

Systemets Milky Way Galaxy) synes at være bevæger sig med

627 ± 22 km / s forhold til referenceramme for CMB

(også kaldet CMB resten ramme, eller ramme

henvisning, hvor der ikke er nogen bevægelse gennem CMB)

i retning af galaktisk længde l = 276 ± 3 °,

b = 30 ± 3 °. [60] Denne bevægelse resulterer i en anisotropi af

dataene (CMB optræder lidt varmere i den retning,

bevægelighed end i den modsatte retning). [61] Den

standard fortolkning af denne temperatur variation

en enkel hastighed rødforskydning og blueshift på grund af bevægelse

i forhold til CMB, men alternative kosmologiske modeller

kan forklare nogle brøkdel af de observerede dipol

temperaturfordeling i CMB. [62]

Vor bevægelse i forhold til Baggrundsstråling må da i så fald være i retningen ...

Galactic

longitude 276°

latitude +30°

600-talsystemet

Noa-longitude 460 ± 5

Noa-latitude 50 ± 5