MAYDANAK BALANDTOG‘ OBSERVATORIYASIDA OJ 287 VA BL LAC BLAZARLARINING FOTOMETRIK KUZATUVLARI VA YORQINLIK O‘ZGARUVCHANLIGI TAHLILI
Abstract
Ushbu maqolada Maydanak balandtog‘ observatoriyasining yuqori aniqlikdagi optik teleskoplari yordamida olingan ma’lumotlar asosida BL Lac turidagi faol galaktika yadrosi — OJ 287 blazarining fotometrik kuzatuvlari natijalari keltirilgan. Kuzatuv materiallariga standart fotometrik ishlov berish usullari qo‘llanilib, obektning turli vaqt miqyoslaridagi (tunlararo va uzoq muddatli) yorqinlik o‘zgaruvchanligi tahlil qilingan. Tadqiqot davomida OJ 287 blazarining yorug‘lik egri chizig‘idagi chaqnashlar (flares) va minimal faollik davrlari aniqlangan hamda uning yadrosidagi o‘ta og‘ir qo‘shaloq qora tuynuk modeliga xos bo‘lgan davriy o‘zgarishlar tabiati muhokama etilgan. Maydanak observatoriyasining yuqori astroiqlimiy imkoniyatlari obekt yorqinligining kichik amplitudali mikromonitoring (intra-night) o‘zgarishlarini ham aniqlash imkonini berganligi ko‘rsatib o‘tilgan. Olingan natijalar blazarlardagi relyativistik oqimlar (jet) va nurlanish mexanizmlarini tushunishda muhim ahamiyatga ega.
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