Uzun y\u0131llard\u0131r d\u00fcnya d\u0131\u015f\u0131 ya\u015famla ili\u015fkilendirilen ve insanl\u0131\u011f\u0131 heyecanland\u0131ran gizemli radyo sinyallerinin kayna\u011f\u0131 b\u00fcy\u00fck \u00f6l\u00e7\u00fcde ayd\u0131nlat\u0131ld\u0131. Ara\u015ft\u0131rmac\u0131lar, bir d\u00f6nem uzayl\u0131lar\u0131n ileti\u015fim kurma \u00e7abas\u0131 olabilece\u011fi y\u00f6n\u00fcnde spek\u00fclasyonlara yol a\u00e7an bu sinyallerin, asl\u0131nda birbirleriyle etkile\u015fim halindeki iki y\u0131ld\u0131zdan geldi\u011fini belirledi. Yeni ara\u015ft\u0131rmalar, s\u00f6z konusu sinyallerin tamamen do\u011fal bir astronomik s\u00fcre\u00e7ten kaynakland\u0131\u011f\u0131n\u0131 ortaya koyuyor.<\/p>\n\n\n\n
\u0130ngiliz gazetesi The Independent’\u0131n haberine g\u00f6re, bilim insanlar\u0131n\u0131n uzun s\u00fcredir \u00e7\u00f6zmeye \u00e7al\u0131\u015ft\u0131\u011f\u0131 bu gizemli sinyaller, astronomi literat\u00fcr\u00fcnde ‘uzun s\u00fcreli ge\u00e7ici radyo olaylar\u0131’ (Long-Period Radio Transients) olarak adland\u0131r\u0131l\u0131yor.<\/p>\n\n\n\n
G\u00fc\u00e7l\u00fc radyo dalgalar\u0131 ve X-\u0131\u015f\u0131n\u0131 patlamalar\u0131 \u015feklinde ortaya \u00e7\u0131kan bu kozmik hareketler, yakla\u015f\u0131k her 1,4 saatte bir tekrarlan\u0131yor ve Samanyolu Galaksisi’nin uzak b\u00f6lgelerinden D\u00fcnya’ya ula\u015f\u0131yor.<\/p>\n\n\n\n
Ara\u015ft\u0131rmac\u0131lar art\u0131k bu sinyallerin kayna\u011f\u0131n\u0131 net bir \u015fekilde belirlediklerine inan\u0131yor. Bilim insanlar\u0131na g\u00f6re sinyaller, ‘beyaz c\u00fcce’ olarak bilinen son derece yo\u011fun ve k\u00fc\u00e7\u00fck bir y\u0131ld\u0131zdan kaynaklan\u0131yor.<\/p>\n\n\n\n
Bu beyaz c\u00fcce, yak\u0131n\u0131ndaki daha b\u00fcy\u00fck ancak daha d\u00fc\u015f\u00fck yo\u011funlu\u011fa sahip e\u015f y\u0131ld\u0131zdan madde \u00e7ekiyor. \u00c7ekilen bu madde beyaz c\u00fccenin etraf\u0131nda spiral \u015fekilde d\u00f6nerek ilerliyor ve bu s\u00fcre\u00e7te g\u00fc\u00e7l\u00fc radyo dalgalar\u0131 ile X-\u0131\u015f\u0131nlar\u0131 \u00fcretiyor.<\/p>\n\n\n\n
Ara\u015ft\u0131rmay\u0131 y\u00f6neten Koffi Rose, ke\u015ffin \u00f6nemini \u015fu s\u00f6zlerle de\u011ferlendirdi:<\/p>\n\n\n\n
\n“\u0130lk kez bu sinyallerin kayna\u011f\u0131n\u0131 kesin olarak belirledik. Bunlar\u0131n, \u00fczerinde madde biriken bir beyaz c\u00fcceden kaynakland\u0131\u011f\u0131n\u0131 do\u011frulad\u0131k.”<\/p>\n<\/blockquote>\n\n\n\n
Koffi Rose, uzun periyotlu ge\u00e7ici radyo olaylar\u0131n\u0131n y\u0131llard\u0131r astronomlar\u0131 \u015fa\u015fk\u0131na \u00e7evirdi\u011fini belirterek, \u015fimdiye kadar d\u00fcnya genelinde yaln\u0131zca yakla\u015f\u0131k 12 benzer olay\u0131n tespit edildi\u011fini ve k\u00f6kenlerinin bug\u00fcne kadar bilinmedi\u011fini de s\u00f6zlerine ekledi.<\/p>\n\n\n\n
ASKAP J1745\u22125051 Sisteminde \u0130ki Y\u0131ld\u0131zl\u0131 Dans<\/h3>\n\n\n\n
Ara\u015ft\u0131rmada mercek alt\u0131na al\u0131nan ve ASKAP J1745\u22125051<\/strong> olarak adland\u0131r\u0131lan sistem, birbirine son derece yak\u0131n y\u00f6r\u00fcngelerde d\u00f6nen iki y\u0131ld\u0131zdan olu\u015fuyor.<\/p>\n\n\n\n
Y\u0131ld\u0131zlar aras\u0131ndaki bu yak\u0131n etkile\u015fim s\u0131ras\u0131nda e\u015f y\u0131ld\u0131zdan kopan madde y\u00fcksek s\u0131cakl\u0131klara ula\u015f\u0131yor ve X-\u0131\u015f\u0131nlar\u0131 yay\u0131yor. Ayn\u0131 zamanda her iki y\u0131ld\u0131z\u0131n sahip oldu\u011fu g\u00fc\u00e7l\u00fc manyetik alanlar, D\u00fcnya’dan alg\u0131lanan d\u00fczenli radyo darbelerini \u00fcretiyor.<\/p>\n\n\n\n
Daha \u00f6nce ara\u015ft\u0131rmac\u0131lar, bu t\u00fcr sinyallerin yava\u015f d\u00f6nen n\u00f6tron y\u0131ld\u0131zlar\u0131ndan, yani pulsarlardan kaynakland\u0131\u011f\u0131n\u0131 tahmin ediyordu. Ancak son teorik \u00e7al\u0131\u015fmalar, bu kadar yava\u015f d\u00f6nen y\u0131ld\u0131zlar\u0131n s\u00f6z konusu sinyalleri \u00fcretememesi gerekti\u011fini ortaya koydu. Yeni ke\u015fif, bu y\u00f6n\u00fcyle astronomi d\u00fcnyas\u0131nda uzun s\u00fcredir devam eden b\u00fcy\u00fck bir tart\u0131\u015fmay\u0131 da sonland\u0131rm\u0131\u015f oldu.<\/p>\n\n\n\n
Gelecekteki Kozmik Gizemlerin Anahtar\u0131<\/h3>\n\n\n\n
Bilim insanlar\u0131, Nature Astronomy dergisinde yay\u0131mlanan bu \u00f6nemli ara\u015ft\u0131rman\u0131n sonu\u00e7lar\u0131n\u0131n yaln\u0131zca tek bir sinyal kayna\u011f\u0131n\u0131 a\u00e7\u0131klamakla kalmayaca\u011f\u0131n\u0131 vurguluyor. Bu ke\u015fif, uzay\u0131n farkl\u0131 b\u00f6lgelerinden gelen ve hen\u00fcz gizemi \u00e7\u00f6z\u00fclememi\u015f benzer sinyallerin de de\u015fifre edilmesine do\u011frudan katk\u0131 sa\u011flayacak.<\/p>\n\n\n\n