قطر-1

(تم التحويل من Qatar-1b)
قطر-1
بيانات الرصـد
الحقبة J2000      اعتدال
الكوكبة Draco
الصعود المستقيم 20س 13د 31.6176ث
الميل 65° 09′ 43.4909″
القدر الظاهري (V)12.84
الخـصـائص
النوع الطيفيK3V
B-V دليل الألوان1.06
V-R دليل الألوان0.19
النوع المتغيرplanetary transit variable
علم القياسات الفلكية
السرعة القطرية (Rv)-37.835+0.063−{{{2}}} كم/ث
الحركة الحقيقية (μ) RA: 12.636+0.048−{{{2}}} mas/yr
Dec.: 58.170+0.041−{{{2}}} mas/س
اختلاف المنظر (π)5.3587 ± 0.0231 mas
المسافةس ض
( ف ن)
التـفـاصـيل[1][2]
الكتلة0.85+0.03−{{{2}}} M☉
نصف القطر0.823+0.025−{{{2}}} R☉
جاذبية السطح (ج)4.536+0.024−{{{2}}} س.ج.ث.
درجة الحرارة4861+125−{{{2}}} ك
المعدنية [Fe/H]0.2+0.1−{{{2}}} العشرية
تسارع الدوران (v sin i)1.7+0.3−{{{2}}} كم/ث
العمر4.5 م.س.
تسميات أخرى
Qatar-1, 2MASS J20133160+6509433, Gaia DR2 2244830490514284928, V592 Dra[3]
مراجع قواعد البيانات
SIMBADdata

Qatar-1 is an orange main sequence star in the constellation of Draco.

خصائص النجم

Qatar-1 has an average to high metallicity of 160% of solar,[1] and is of similar age to Sun.[2] The star has significant starspot activity.[4]

النظام الكوكبي

The "Hot Jupiter" class planet Qatar-1b was discovered by the Qatar Exoplanet Survey in 2010.[1] The planetary orbit is likely aligned with the rotational axis of the star, with the misalignment measurement based on the Rossiter-McLaughlin effect equal to −8.4+7.1−{{{2}}} degrees.[2] The planet has a large measured temperature difference between dayside (1696+39−{{{2}}} K) and nightside (1098+158−{{{2}}} K).[5] A spectroscopic study in 2017 does suggest that Qatar-1b has relatively clear skies with a few clouds.[6]

Additional planets or a brown dwarf in the system were suspected in 2013,[7] but were refuted in 2015.[8][9]

The transit-timing variation search in 2020 has also resulted in no detection of additional planets in the system,[10][11] although by 2022 additional transit-timing variation data have suggested the planetary system is accelerating under influence of the unseen long-period companion.[12]

نظام Qatar-1 [1][2][10]
المرافق
(بالترتيب من النجم) 		الكتلة نصف المحور الرئيسي
(و.ف.) 		الدور المداري
(يوم) 		الانحراف الميل نصف القطر
b 1.33+0.05−{{{2}}} MJ 0.02343+0.0012−{{{2}}} 1.4200236+0.0000001−{{{2}}}[11] 0.020+0.011−0.01 1.19+0.09−{{{2}}} RJ

المصادر

  1. ^ أ ب ت ث Alsubai, K. A.; Parley, N. R.; Bramich, D. M.; West, R. G.; Sorensen, P. M.; Collier Cameron, A.; Latham, D. W.; Horne, K.; Anderson, D. R.; Bakos, G. Á.; Brown, D. J. A.; Buchhave, L. A.; Esquerdo, G. A.; Everett, M. E.; Fűrész, G.; Hartman, J. D.; Hellier, C.; Miller, G. M.; Pollacco, D.; Quinn, S. N.; Smith, J. C.; Stefanik, R. P.; Szentgyorgyi, A. (2011). "Qatar-1b: A hot Jupiter orbiting a metal-rich K dwarf star". Monthly Notices of the Royal Astronomical Society. 417 (1): 709–716. arXiv:1012.3027. Bibcode:2011MNRAS.417..709A. doi:10.1111/j.1365-2966.2011.19316.x. S2CID 55675165.
  2. ^ أ ب ت ث Covino, E.; Esposito, M.; Barbieri, M.; Mancini, L.; Nascimbeni, V.; Claudi, R.; Desidera, S.; Gratton, R.; Lanza, A. F.; Sozzetti, A.; Biazzo, K.; Affer, L.; Gandolfi, D.; Munari, U.; Pagano, I.; Bonomo, A. S.; Collier Cameron, A.; Hébrard, G.; Maggio, A.; Messina, S.; Micela, G.; Molinari, E.; Pepe, F.; Piotto, G.; Ribas, I.; Santos, N. C.; Southworth, J.; Shkolnik, E.; Triaud, A. H. M. J.; et al. (2013). "The GAPS programme with HARPS-N at TNG". Astronomy & Astrophysics. 554: A28. arXiv:1304.0005. doi:10.1051/0004-6361/201321298. S2CID 54793301.
  3. ^ Qatar 1 -- High proper-motion Star
  4. ^ Mislis, D.; Mancini, L.; Tregloan-Reed, J.; Ciceri, S.; Southworth, J.; d'Ago, G.; Bruni, I.; Baştürk, Ö.; Alsubai, K. A.; Bachelet, E.; Bramich, D. M.; Henning, Th.; Hinse, T. C.; Iannella, A. L.; Parley, N.; Schroeder, T. (2015). "High-precision multiband time series photometry of exoplanets Qatar-1b and TrES-5b". Monthly Notices of the Royal Astronomical Society. 448 (3): 2617–2623. arXiv:1503.02246. Bibcode:2015MNRAS.448.2617M. doi:10.1093/mnras/stv197. S2CID 53561305.
  5. ^ May, Erin; Stevenson, Kevin; Bean, Jacob; Bell, Taylor; Cowan, Nicolas; Dang, Lisa; Desert, Jean-Michel; Fortney, Jonathan; et al. (2022), "A New Analysis of Eight Spitzer Phase Curves and Hot Jupiter Population Trends: Qatar-1b, Qatar-2b, WASP-52b, WASP-34b, and WASP-140b", The Astronomical Journal 163 (6): 256, doi:10.3847/1538-3881/ac6261, Bibcode: 2022AJ....163..256M 
  6. ^ von Essen, C.; Cellone, S.; Mallonn, M.; Albrecht, S.; Miculán, R.; Müller, H. M. (2017). "Testing connections between exo-atmospheres and their host stars". Astronomy & Astrophysics. 603: A20. arXiv:1703.10647. doi:10.1051/0004-6361/201730506. S2CID 119452420.
  7. ^ von Essen, C.; Schröter, S.; Agol, E.; Schmitt, J. H. M. M. (2013). "Qatar-1: Indications for possible transit timing variations". Astronomy & Astrophysics. 555: A92. arXiv:1309.1457. Bibcode:2013A&A...555A..92V. doi:10.1051/0004-6361/201321407. S2CID 119174903.
  8. ^ MacIejewski, G.; Fernández, M.; Aceituno, F. J.; Ohlert, J.; Puchalski, D.; Dimitrov, D.; Seeliger, M.; Kitze, M.; Raetz, St.; Errmann, R.; Gilbert, H.; Pannicke, A.; Schmidt, J.-G.; Neuhäuser, R. (2015). "No variations in transit times for Qatar-1 B". Astronomy & Astrophysics. 577: A109. arXiv:1503.07191. Bibcode:2015A&A...577A.109M. doi:10.1051/0004-6361/201526031. S2CID 118638934.
  9. ^ Collins, Karen A.; Kielkopf, John F.; Stassun, Keivan G. (2015). "TRANSIT TIMING VARIATION MEASUREMENTS OF WASP-12b AND QATAR-1b: NO EVIDENCE OF ADDITIONAL PLANETS". The Astronomical Journal. 153 (2): 78. arXiv:1512.00464. doi:10.3847/1538-3881/153/2/78. S2CID 55191644.
  10. ^ أ ب Thakur, Parijat; Mannaday, Vineet Kumar; Sahu, Devendra Kumar; Chand, Swadesh; Jiang, Ing-Guey (2020), "Investigating Extra-solar Planetary System Qatar-1 through Transit Observations", Bulletin de la Société Royale des Sciences de Liège: 132–136, doi:10.25518/0037-9565.7577 
  11. ^ أ ب Su, Li-Hsin; Jiang, Ing-Guey; Sariya, Devesh P.; Lee, Chiao-Yu; Yeh, Li-Chin; Mannaday, Vineet Kumar; Thakur, Parijat; Sahu, D. K.; et al. (2021), "Are There Transit Timing Variations for the Exoplanet Qatar-1b?", The Astronomical Journal 161 (3): 108, doi:10.3847/1538-3881/abd4d8, Bibcode: 2021AJ....161..108S 
  12. ^ Mannaday, Vineet Kumar; Thakur, Parijat; Southworth, John; Jiang, Ing-Guey; Sahu, D. K.; Mancini, L.; Vaňko, M.; Kundra, Emil; et al. (2022), "Revisiting the Transit Timing Variations in the TrES-3 and Qatar-1 Systems with TESS Data", The Astronomical Journal 164 (5): 198, doi:10.3847/1538-3881/ac91c2, Bibcode: 2022AJ....164..198M 
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