Ziyosfera

2M1207

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. [6]

2M1207

European Southern Observatory infrared image of 2M1207 (bluish) and companion planet 2M1207b (reddish), taken in 2004.
Kuzatuv maʼlumotlari
Epoch J2000.0      Equinox J2000.0 (ICRS)
Yulduz turkumi Sentavr
Right ascension 12soat 07daq 33.47s[1]
Deklensiya {{{dek}}}
Koʻrinuvchi kattaligi (V) {{{Koʻrinuvchi kattaligi}}}
Characteristics
Spectral type M8p[1]
V−R color index +2.1[2]
R−I color index +2.1[2]
Astrometry
Proper motion (μ) RA: −64.040±0.087[3] mas/yr
Dec.: −23.678±0.072[3] mas/yr
Parallax (π)15.4624±0.1163 mas[3]
DistanceAndoza:ErrorBar2 ly
(Andoza:ErrorBar2 pc)
Details
Mass~0.025[4] M☉
Radius~0.25[5] R☉
Luminosity~0.002[5] L☉
Temperature2550 ± 150[5] K
Age5·106 to 10·106[5] years
Other designations
2MASSW J1207334−393254, 2MASS J12073346-3932539, TWA 27[1]
Maʼlumotlar baʼzasi uchun havolalar
SIMBADmaʼlumot

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

bilan o'ralgan. [7] 2M1207 keng H a chizig'i tufayli birinchi bo'lib bunday diskga ega ekanligiga shubha qilingan edi. Keyinchalik bu ultrabinafsha spektroskopiya bilan tasdiqlangan.[7] Chang diskining mavjudligi infraqizil kuzatuvlar bilan ham tasdiqlangan.[8] 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.[9] 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.[10] Bu esa juda zavqli, shunday emasmi?!

2M1207gacha bo'lgan masofa uchun dastlabki fotometrik taxmin 70 parsek edi.[4] 2005 yil dekabr oyida amerikalik astronom Eric Mamajek [fr] harakatlanuvchi klaster usuli yordamida 2M1207gacha aniqroq masofani (53 ± 6 parsek) xabar qildi.[11] 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

Klassik yulduzlar singari, ko'plab jigarrang mittilar jigarrang mitti ustiga to'plangan gaz va chang radius bilan o'ralgan. [12] 2M1207 keng H a chizig'i tufayli birinchi bo'lib bunday diskga ega ekanligiga shubha qilingan edi. Keyinchalik bu ultrabinafsha spektroskopiya bilan tasdiqlangan.[12] Chang diskining mavjudligi infraqizil kuzatuvlar bilan ham tasdiqlangan.[13] 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.[14] 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.[15]Andoza:OrbitboxOnePlanet

  1. ↑ 1,0 1,1 1,2 „TWA 27“. SIMBAD. Centre de données astronomiques de Strasbourg. Qaraldi: 2008-yil 15-iyun.
  2. ↑ 2,0 2,1 2,2 An accurate distance to 2M1207Ab, C. Ducourant, R. Teixeira, G. Chauvin, G. Daigne, J.-F. Le Campion, Inseok Song, and B. Zuckerman, Astronomy and Astrophysics 477, #1 (January 2008), pp. L1–L4. Bibcode:2008A&A...477L...1D doi:10.1051/0004-6361:20078886.
  3. ↑ 3,0 3,1 3,2 Andoza:Cite Gaia EDR3
  4. ↑ 4,0 4,1 "The Distance to the 2M1207 System" Webarxiv andozasida xato: |url= qiymatini tekshiring. Boʻsh., Eric Mamajek, November 8, 2007.
  5. ↑ 5,0 5,1 5,2 5,3 The Planetary Mass Companion 2MASS 1207-3932B: Temperature, Mass, and Evidence for an Edge-on Disk, Subhanjoy Mohanty, Ray Jayawardhana, Nuria Huelamo, and Eric Mamajek, Astrophysical Journal 657, #2 (March 2007), pp. 1064–1091. Bibcode:2007ApJ...657.1064M doi:10.1086/510877.
  6. ↑ 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. 
  7. ↑ 7,0 7,1 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.
  8. ↑ Spitzer Observations of Two TW Hydrae Association Brown Dwarfs, Basmah Riaz, John E. Gizis, and Abraham Hmiel, Astrophysical Journal 639, #2 (March 2006), pp.
  9. ↑ WhelanUnrecognized 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. 
  10. ↑ Small Stars Create Big Fuss, Ker Than, May 28, 2007, space.com.
  11. ↑ 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. https://archive.org/details/sim_astrophysical-journal_2005-12-01_634_2/page/n688. 
  12. ↑ 12,0 12,1 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.
  13. ↑ Spitzer Observations of Two TW Hydrae Association Brown Dwarfs, Basmah Riaz, John E. Gizis, and Abraham Hmiel, Astrophysical Journal 639, #2 (March 2006), pp.
  14. ↑ WhelanUnrecognized 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. 
  15. ↑ Small Stars Create Big Fuss, Ker Than, May 28, 2007, space.com.

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