Caltech \u00dcniversitesi’nin sitesinde yer alan habere g\u00f6re, The Astronomical Journal’da iki ayr\u0131 makalede yay\u0131mlanan bulgular, \u00fcniversitenin liderli\u011findeki bir g\u00f6kbilimci ekibi taraf\u0131ndan ke\u015ffedildi.<\/p>\n
Yeni \u00e7al\u0131\u015fmalarda, 103 \u0131\u015f\u0131k y\u0131l\u0131 uzakl\u0131kta bulunan TOI 560 adl\u0131 y\u0131ld\u0131z sistemindeki iki mini Nept\u00fcn gezegeninden birini incelemek i\u00e7in Hawaii’deki Maunakea’n\u0131n tepesinde yer alan W. M. Keck G\u00f6zlemevi ve 73 \u0131\u015f\u0131k y\u0131l\u0131 uzakl\u0131kta bulunan HD 63433 y\u00f6r\u00fcngesinde d\u00f6nen iki mini Nept\u00fcn’e bakmak i\u00e7in NASA’n\u0131n Hubble Uzay Teleskobu kullan\u0131ld\u0131.<\/p>\n
Elde edilen sonu\u00e7lar, atmosferik gaz\u0131n TOI 560’taki TOI 560.01 olarak adland\u0131r\u0131lan en i\u00e7teki mini Nept\u00fcn’den ve HD 63433’teki HD 63433 c olarak adland\u0131r\u0131lan en d\u0131\u015ftaki mini Nept\u00fcn’den ka\u00e7t\u0131\u011f\u0131n\u0131 g\u00f6steriyor. Bu da, mini Nept\u00fcnlerin s\u00fcper D\u00fcnyalara d\u00f6n\u00fc\u015febileceklerine i\u015faret ediyor.
\nHer iki \u00e7al\u0131\u015fman\u0131n da ba\u015f yazar\u0131 ve Caltech’te y\u00fcksek lisans \u00f6\u011frencisi olan Michael Zhang, “G\u00f6kbilimcilerin \u00e7o\u011fu gen\u00e7, k\u00fc\u00e7\u00fck mini Nept\u00fcnlerin buharla\u015fan atmosferleri olmas\u0131 gerekti\u011finden \u015f\u00fcpheleniyordu. Ancak \u015fimdiye kadar kimse bunu g\u00f6zlemlememi\u015fti.” dedi.<\/p>\n
\u00c7al\u0131\u015fma ayr\u0131ca \u015fa\u015f\u0131rt\u0131c\u0131 bir \u015fekilde, TOI 560.01 \u00e7evresindeki gaz\u0131n a\u011f\u0131rl\u0131kl\u0131 olarak y\u0131ld\u0131za do\u011fru ka\u00e7t\u0131\u011f\u0131n\u0131 buldu.<\/p>\n
Zhang’\u0131n dan\u0131\u015fman\u0131 ve \u00e7al\u0131\u015fman\u0131n ortak yazar\u0131 Gezegen Bilimi Profes\u00f6r\u00fc Heather Knutson, “\u00c7o\u011fu model gaz\u0131n y\u0131ld\u0131zdan uza\u011fa akmas\u0131 gerekti\u011fini tahmin etti\u011finden bu beklenmedik bir durumdu. Bu \u00e7\u0131k\u0131\u015flar\u0131n pratikte nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131 hakk\u0131nda hala \u00f6\u011frenecek \u00e7ok \u015feyimiz var.” diye konu\u015ftu.<\/p>\n
Knutson, “D\u0131\u015f gezegen bilimciler olarak, beklenmeyeni beklemeyi \u00f6\u011frendik. Bu egzotik d\u00fcnyalar, G\u00fcne\u015f Sistemimizde g\u00f6zlemlediklerimizin \u00f6tesine ge\u00e7en yeni fizik ile bizi s\u00fcrekli \u015fa\u015f\u0131rt\u0131yor.” ifadesini kulland\u0131.<\/p>\n
“TOI 560.01’den Ka\u00e7an Helyum, Gen\u00e7 Bir Mini Nept\u00fcn” ba\u015fl\u0131kl\u0131 \u00e7al\u0131\u015fma, NASA taraf\u0131ndan finanse edildi.<\/p>\n
“HD 63433c, Gen\u00e7 Mini Nept\u00fcn’den Devam Eden K\u00fctle Kayb\u0131n\u0131n Tespiti” ba\u015fl\u0131kl\u0131 \u00e7al\u0131\u015fma, NASA’n\u0131n yan\u0131 s\u0131ra Avrupa Ara\u015ft\u0131rma Konseyi, Bilim ve Teknoloji Tesisleri Konseyi (\u0130ngiltere), Ulusal Uzay Ara\u015ft\u0131rmalar\u0131 Merkezi (Frans\u0131z Uzay Ajans\u0131), Ulusal Bilim Vakf\u0131, Tennessee Eyalet \u00dcniversitesi ve Tennessee M\u00fckemmellik Merkezleri Program\u0131 taraf\u0131ndan finanse edildi.
\n\u00d6te gezegenler<\/p>\n
\u00d6te gezegenler ve y\u0131ld\u0131zlar<\/span><\/p>\n G\u00fcne\u015f benzeri y\u0131ld\u0131zlar\u0131n y\u00f6r\u00fcngesinde d\u00f6nen ilk \u00f6te gezegenler 1990’lar\u0131n ortalar\u0131nda ke\u015ffedildi.<\/p>\n Mini Nept\u00fcnler ve s\u00fcper D\u00fcnyalar olarak ikiye ayr\u0131lan bu gezegenler g\u00fcne\u015f sisteminde bulunmuyor.<\/p>\n S\u00fcper D\u00fcnyalar\u0131n, D\u00fcnya’n\u0131n 1,6 kat\u0131 b\u00fcy\u00fckl\u00fc\u011f\u00fcnde (ve bazen D\u00fcnya’n\u0131n 1,75 kat\u0131 b\u00fcy\u00fckl\u00fc\u011f\u00fcnde), mini Nept\u00fcnlerin ise D\u00fcnya’n\u0131n iki ila d\u00f6rt kat\u0131 b\u00fcy\u00fckl\u00fc\u011f\u00fcnde oldu\u011fu biliniyor.<\/p>\n Gezegenlerin y\u0131ld\u0131zlar\u0131ndan gelen radyasyon, atmosferlerini soyarak, kaynar su dolu bir tencereden \u00e7\u0131kan buhar gibi s\u0131cak gaz\u0131n ka\u00e7mas\u0131na neden oluyor.<\/p>\n Mini Nept\u00fcnler, g\u00fcne\u015f sisteminin d\u0131\u015f\u0131ndaki y\u0131ld\u0131zlar\u0131n y\u00f6r\u00fcngesinde d\u00f6nen gezegenler olan bir d\u0131\u015f gezegen s\u0131n\u0131f\u0131 olarak biliniyor. Nept\u00fcn gezegeninin daha k\u00fc\u00e7\u00fck, daha yo\u011fun versiyonlar\u0131 olan bu d\u00fcnyalar, kal\u0131n gaz \u00f6rt\u00fcleriyle \u00e7evrili b\u00fcy\u00fck kayal\u0131k \u00e7ekirdeklerden olu\u015fuyor.<\/p>\n