Справжня маса

Термін справжня маса є синонімом терміну маси, але використовується в астрономії, щоб відрізняти виміряну масу небесного тіла від нижньої межі його маси, отриманої зазвичай в результаті вимірювання його променевої швидкості.[1] Методи, які використовуються для визначення дійсної маси планети, включають вимірювання відстані до одного з її супутників і його періоду обертання,[2] розширені методи астрометрії з використанням руху інших планет в тій же зоряній системі,[1] поєднання методу вимірювання променевих швидкостей зі спостереженнями транзитів (при дуже низьких кутах нахилу орбіти)[3] або вимірюваннями зоряного паралаксу (які також визначають нахилення).[4]

Див. також

Посилання

  1. а б "McDonald Observatory astronomers discover Neptune-sized planet with Hobby-Eberly Telescope". University of Texas at Austin. 31 серпня 2004.(англ.)
  2. Brown, Michael E.; Schaller, Emily L. (15 червня 2007). "The Mass of Dwarf Planet Eris". Science. 316 (5831): 1585. Bibcode:2007Sci...316.1585B. doi:10.1126/science.1139415. PMID 17569855.(англ.)
  3. "How do we know the density of some extrasolar planets?" Curious About Astronomy?(англ.)
  4. Han, Inwoo; Black, David C.; Gatewood, George (2001). "Preliminary Astrometric Masses for Proposed Extrasolar Planetary Companions". The Astrophysical Journal Letters. 548 (1): L57–L60. Bibcode:2001ApJ...548L..57H. doi:10.1086/318927.(англ.)

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