Английская Википедия:Cosmos Redshift 7

Материал из Онлайн справочника
Перейти к навигацииПерейти к поиску

Шаблон:Short description Шаблон:Use dmy dates Шаблон:Use British English Шаблон:Infobox galaxy Cosmos Redshift 7 (also known as COSMOS Redshift 7, Galaxy Cosmos Redshift 7, Galaxy CR7 or CR7) is a high-redshift Lyman-alpha emitter galaxy. At a redshift z = 6.6,[1] the galaxy is observed as it was about 800 million years after the Big Bang, during the epoch of reionisation.[1] With a light travel time of 12.9 billion years, it is one of the oldest, most distant galaxies known.

CR7 shows some of the expected signatures of Population III stars i.e. the first generation of stars produced during early galaxy formation.[1][2][3][4][5] These signatures were detected in a bright pocket of blue stars; the rest of the galaxy contains redder Population II stars.[3] However, recent studies show no evidence for population III stars in CR7.[6]

Description

Galaxy Cosmos Redshift 7 contains old Population II (metal-poor) and possibly Population III (stars with extremely poor metallicity), according to astronomers,[1][2] and is three times brighter than the brightest distant galaxies (redshift, z > 6)[1][7] detected up to the time of its discovery.[3][5]

Discovery

Astronomers led by David Sobral, a Reader in Astrophysics at the University of Lancaster, used the Very Large Telescope (VLT) at the European Southern Observatory—with help from the W. M. Keck Observatory, Subaru Telescope and the NASA/ESA Hubble Space Telescope—made the discovery.[5] The research team included members of the University of California, Riverside,[5] University of Geneva, University of Leiden and University of Lisbon.[1] The name of the galaxy (Cosmos Redshift 7 Galaxy) was inspired by football player Cristiano Ronaldo, also popularly known as CR7. [3][8][9][10]

See also

References

Шаблон:Reflist

External links

Шаблон:Galaxy Шаблон:Stars of Sextans Шаблон:European Southern Observatory Шаблон:Portal bar Шаблон:Sky

  1. 1,0 1,1 1,2 1,3 1,4 1,5 Ошибка цитирования Неверный тег <ref>; для сносок AJ-20150604 не указан текст
  2. 2,0 2,1 Ошибка цитирования Неверный тег <ref>; для сносок NYT-20150617 не указан текст
  3. 3,0 3,1 3,2 3,3 Ошибка цитирования Неверный тег <ref>; для сносок eso1524 не указан текст
  4. Ошибка цитирования Неверный тег <ref>; для сносок ES-20150617 не указан текст
  5. 5,0 5,1 5,2 5,3 Ошибка цитирования Неверный тег <ref>; для сносок UCR-20150617 не указан текст
  6. Ошибка цитирования Неверный тег <ref>; для сносок rtder не указан текст
  7. Ошибка цитирования Неверный тег <ref>; для сносок MNRAS-20150721 не указан текст
  8. Ошибка цитирования Неверный тег <ref>; для сносок Uorye не указан текст
  9. Ошибка цитирования Неверный тег <ref>; для сносок G8uQI не указан текст
  10. Ошибка цитирования Неверный тег <ref>; для сносок nR9Hl не указан текст