Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Shigewa: Kusan dukkanin ƙananan taurari da matsakaici (ƙasa da kimanin 9 M<unk>) zasu ƙare a matsayin fararen dwarfs da zarar sun ƙare da samar da man fetur na thermonuclear. Irin waɗannan taurari suna ciyar da mafi yawan rayuwarsu masu samar da makamashi a matsayin tauraron babban tsari. Lokacin da tauraruwa ke ciyarwa a kan babban jerin ya dogara ne akan nauyinsa, tare da tsawon rayuwar da ke raguwa tare da ƙara yawan taro. Don haka, don IK Pegasi B ya zama farin dwarf kafin bangaren A, dole ne ya kasance ya fi girma fiye da bangaren A. A zahiri, an yi imanin cewa magajin IK Pegasi B yana da taro tsakanin 5 da 8 M<unk>. Kamar yadda aka cinye man fetur na hydrogen a cikin zuciyar magajin IK Pegasi B, ya samo asali a cikin jan giant. Ƙarƙashin ciki ya ƙulla har sai hydrogen ya fara ƙonewa a cikin wani harsashi da ke kewaye da helium core. Don daidaita yawan zafin jiki, murfin waje ya fadada zuwa sau da yawa radius da yake da shi a matsayin babban jerin taurari. Lokacin da tsakiya ta kai zafin jiki da yawa inda helium zai iya fara fushin wannan tauraron ya ƙulla kuma ya zama abin da ake kira tauraron rassan kwance. Wato, yana cikin rukunin taurari da suke faɗuwa a kan layi mai faɗi a kan zane-zane na H-R. Haɗuwa da helium ya samar da tsakiya na carbon da oxygen. Lokacin da helium ya ƙare a cikin tsakiya an samar da murfin mai ƙona helium ban da wanda ke ƙona hydrogen kuma tauraron ya koma abin da masanan taurari suka kira asymptotic giant reshe, ko AGB. (Wannan hanya ce da ke kaiwa zuwa kusurwar dama ta sama na zane-zanen H-R.) Idan tauraron yana da isasshen taro, a cikin lokaci za a iya fara hadawar carbon a cikin tsakiya, samar da oxygen, neon da magnesium. Rufin waje na jan giant ko AGB star na iya fadada zuwa sau ɗari na radius na Sun, yana mamaye radius na kimanin 5 × 108 km (3 AU) a cikin yanayin tauraron AGB na Mira. Wannan ya wuce matsakaicin rabuwa na yanzu tsakanin taurari biyu a IK Pegasi, don haka a wannan lokacin taurari biyu sun raba envelope ɗaya. Sakamakon haka, yanayin waje na IK Pegasi A na iya samun...  Tambaya: Ta yaya ya biya diyya ga karuwar yawan zafin jiki?
da waje envelope fadada zuwa sau da yawa da radius