2M1207

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|}2M1207, 2M1207A yoki 2MASSW J12073346–3932539 - Centaurus yulduz turkumida joylashgan jigarrang mitti ; 2M1207b hamroh ob'ekti to'g'ridan-to'g'ri tasvirlangan birinchi Quyoshdan tashqari sayyora massasi bo'lishi mumkin va jigarrang mitti atrofida aylanib yurgan birinchi kashf etilgan. [1]

Klassik singari, ko'plab jigarrang mittilar jigarrang mitti ustiga to'plangan gaz va chang halqalari

bilan o'ralgan. [2] 2M1207 keng H a chizig'i tufayli birinchi bo'lib bunday diskga ega ekanligiga shubha qilingan edi. Keyinchalik bu ultrabinafsha spektroskopiya bilan tasdiqlangan.[2] Chang diskining mavjudligi infraqizil kuzatuvlar bilan ham tasdiqlangan.[3] Umuman olganda, disklarning to'planishi diskka perpendikulyar ravishda chiqarilgan materialdan tez harakatlanuvchi oqimlarni hosil qilishi ma'lum. Bu 2M1207 uchun ham kuzatilgan; 2007 yil aprel oyida Astrophysical Journal jurnalida chop etilgan maqolada bu jigarrang mitti o'z qutblaridan zarrachalar otayotgani haqida xabar berilgan.[4] Kosmosga taxminan 10 9 kv. kilometr masofaga cho'zilgan samolyotlar Yevropa janubiy observatoriyasida juda katta teleskop (VLT) yordamida topilgan. Samolyotlardagi materiallar kosmosga soniyasiga bir necha kilometr tezlikda oqadi.[5] Bu esa juda zavqli, shunday emasmi?!

2M1207gacha bo'lgan masofa uchun dastlabki fotometrik taxmin 70 parsek edi.[6] 2005 yil dekabr oyida amerikalik astronom Eric Mamajek [fr] harakatlanuvchi klaster usuli yordamida 2M1207gacha aniqroq masofani (53 ± 6 parsek) xabar qildi.[7] Yangi masofa 2M1207 uchun zaifroq yorqinlikni beradi. Oxirgi trigonometrik parallaks natijalari bu harakatlanuvchi klaster masofasini tasdiqladi, bu esa 53 ± 1 parsek yoki 172 ± 3 yorug'lik yiliga teng masofani baholashga olib keldi.

Sayyora tizimi[tahrir | manbasini tahrirlash]

Klassik yulduzlar singari, ko'plab jigarrang mittilar jigarrang mitti ustiga to'plangan gaz va chang radius bilan o'ralgan. [8] 2M1207 keng H a chizig'i tufayli birinchi bo'lib bunday diskga ega ekanligiga shubha qilingan edi. Keyinchalik bu ultrabinafsha spektroskopiya bilan tasdiqlangan.[8] Chang diskining mavjudligi infraqizil kuzatuvlar bilan ham tasdiqlangan.[9] Umuman olganda, disklarning to'planishi diskka perpendikulyar ravishda chiqarilgan materialdan tez harakatlanuvchi oqimlarni hosil qilishi ma'lum. Bu 2M1207 uchun ham kuzatilgan; 2007 yil aprel oyida Astrophysical Journal jurnalida chop etilgan maqolada bu jigarrang mitti o'z qutblaridan zarrachalar otayotgani haqida xabar berilgan.[10] Kosmosga taxminan 10 9 kilometr masofaga cho'zilgan samolyotlar Yevropa janubiy observatoriyasida juda katta teleskop (VLT) yordamida topilgan. Samolyotlardagi materiallar kosmosga soniyasiga bir necha kilometr tezlikda oqadi.[11]Andoza:OrbitboxOnePlanet

  1. ↑ Chauvin, G.; Lagrange, A.-M.; Dumas, C.; Zuckerman, B.; Mouillet, D.; Song, I.; Beuzit, J.-L.; Lowrance, P. (2004). "A Giant Planet Candidate near a Young Brown Dwarf". Astron. Astrophys. 425 (2): L29–L32. doi:10.1051/0004-6361:200400056. 
  2. ↑ 2,0 2,1 First Ultraviolet Spectrum of a Brown Dwarf: Evidence for H2 Fluorescence and Accretion, John E. Gizis, Harry L. Shipman, and James A. Harvin, Astrophysical Journal 630, #1 (September 2005), pp.
  3. ↑ Spitzer Observations of Two TW Hydrae Association Brown Dwarfs, Basmah Riaz, John E. Gizis, and Abraham Hmiel, Astrophysical Journal 639, #2 (March 2006), pp.
  4. ↑ WhelanExpression error: Unrecognized word "etal". (April 10, 2007). "Discovery of a Bipolar Outflow from 2MASSW J1207334-393254, a 24 MJup Brown Dwarf". The Astrophysical Journal 659 (1): L45 – L48. doi:10.1086/516734. 
  5. ↑ Small Stars Create Big Fuss, Ker Than, May 28, 2007, space.com.
  6. ↑ "The Distance to the 2M1207 System" Webarxiv andozasida xato: |url= qiymatini tekshiring. Boʻsh., Eric Mamajek, November 8, 2007.
  7. ↑ Mamajek (2005). "A Moving Cluster Distance to the Exoplanet 2M1207b in the TW Hydrae Association". The Astrophysical Journal 634 (2): 1385–1394. doi:10.1086/468181. 
  8. ↑ 8,0 8,1 First Ultraviolet Spectrum of a Brown Dwarf: Evidence for H2 Fluorescence and Accretion, John E. Gizis, Harry L. Shipman, and James A. Harvin, Astrophysical Journal 630, #1 (September 2005), pp.
  9. ↑ Spitzer Observations of Two TW Hydrae Association Brown Dwarfs, Basmah Riaz, John E. Gizis, and Abraham Hmiel, Astrophysical Journal 639, #2 (March 2006), pp.
  10. ↑ WhelanExpression error: Unrecognized word "etal". (April 10, 2007). "Discovery of a Bipolar Outflow from 2MASSW J1207334-393254, a 24 MJup Brown Dwarf". The Astrophysical Journal 659 (1): L45 – L48. doi:10.1086/516734. 
  11. ↑ Small Stars Create Big Fuss, Ker Than, May 28, 2007, space.com.

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