Nopea radiopurske Lähteet | Aiheesta muualla | NavigointivalikkoVoimakas radiopurske herätti uumoilut avaruuden älystäFRBCAT: FRB CatalogueFast Radio Bursts (FRB)SETI Institute: FRB 121102: Radio Calling Cards from a Distant Civilization?Science: Mysterious radio bursts may be coming from neutron star orbiting black holeEarthSky: Fast radio bursts: A mystery unfolds

Tähtitieteelliset tapahtumatRadiotähtitiede


radioaaltopurskepulsareistaengl.kvintiljoonajouleamustien aukkojensupernovajäänteidenavaruussumujen







Ensimmäisen havaitun nopean radiopurskeen havainto jonka Lorimer ja Narkovic löysivät vuonna 2007.


Nopea radiopurske on avaruuden tuntemattomasta sijainnista tuleva suurienerginen radioaaltopurske. Ensimmäisen radioaaltopurskeen havaitsivat vuonna 2007 tutkija Duncan Lorimer ja opiskelija David Narkovic tutkiessaan arkistoitua dataa pulsareista. Tämän jälkeen on havaittu useita kerran tapahtuvia radioaaltopurskeita ja yksi toistuva radioaaltopurske. Niitä kutsutaan myös Lorimer Burstiksi. Radioaaltopurskeiden alkuperää ei tiedetä.[1]


FRB 121102 nimellä tunnettu radiopurske on kolmen miljardin valovuoden päässä maapallosta sijaitseva toistuva radiopurske. Nimi FRB tarkoittaa nopeaa radiopursketa (engl. fast radio burst) ja numerot tulevat päivämäärästä ja vuodesta jolloin radiopurske havaittiin ensimmäisen kerran. Yhdessä purskeessa vapautuu energiaa noin kvintiljoona joulea.[1]


Kansainvälinen tutkimusryhmä on saanut selville että nopeita radiopurskeita syntyy ympäristössä, jossa on voimakkaita magneettikenttiä. Tutkimusryhmä otaksuu että purskeet syntyvät mustien aukkojen, supernovajäänteiden tai poikkeuksellisten avaruussumujen lähellä.[2]



Lähteet |



  1. ↑ ab Voimakas radiopurske herätti uumoilut avaruuden älystä Tiede -lehti. 5.9.2017. Viitattu 20.04.2018.


  2. ↑ Tähdet ja avaruus 2/2018 s. 10



Aiheesta muualla |



  • FRBCAT: FRB Catalogue (englanniksi) Lista nopeista radiopurskeista.


  • Fast Radio Bursts (FRB) (englanniksi)


  • SETI Institute: FRB 121102: Radio Calling Cards from a Distant Civilization? (englanniksi)


  • Science: Mysterious radio bursts may be coming from neutron star orbiting black hole (englanniksi)


  • EarthSky: Fast radio bursts: A mystery unfolds (englanniksi)


Käännös suomeksi
Tämä artikkeli tai sen osa on käännetty tai siihen on haettu tietoja muunkielisen Wikipedian artikkelista.
Alkuperäinen artikkeli: en:Fast radio burst








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