أوميكرون النهر

لمعلومات عن other stars with this Bayer designation، انظر Omicron Eridani.
ο1 Eridani
Omicron1EriLightCurve.png
A light curve for Omicron1 Eridani, plotted from TESS data[1]
بيانات الرصـد
الحقبة J2000.0 (ICRS)      اعتدال J2000.0 (ICRS)
الكوكبة Eridanus
الصعود المستقيم 04h 11m 51.93956s[2]
الميل −06 ° 50′ 15.2864″[2]
القدر الظاهري (V)4.04[3]
الخـصـائص
النوع الطيفيF0 III[4]
U-B دليل الألوان+0.10[3]
B-V دليل الألوان+0.32[3]
النوع المتغيرδ Scuti[5]
علم القياسات الفلكية
الحركة الحقيقية (μ) RA: +10.76[2] mas/yr
Dec.: +81.92[2] mas/س
اختلاف المنظر (π)26.80 ± 0.32[2] mas
المسافةس ض
( ف ن)
القدر المطلق (MV)+1.18[6]
التـفـاصـيل
الكتلة1.95[5] M☉
نصف القطر3.7±0.1[5] R☉
جاذبية السطح (log g)3.39[4]
الضياء27[5] L☉
درجة الحرارة6,963[4] ك
سرعة الدوران (v sin i)108.1[7] كم/ث
تسميات أخرى
Beid, ο1 Eri, 38 Eri, BD−07°764, FK5 154, HD 26574, HIP 19587, HR 1298, SAO 131019[8]
مراجع قواعد البيانات
SIMBADdata

أوميكرون النهر Omicron-1 Eridani أو البيض،[9][10] هو نجم متغير في كوكبة النهر. With an average apparent visual magnitude of 4.04,[3] it is visible to the naked eye on a clear, dark night. Based upon parallax measurements, it lies approximately 122 light-years from the Sun.


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التسمية

ο1 Eridani (Latinised to Omicron1 Eridani) is the star's Bayer designation.

The system bears the traditional name Beid derived from the Arabic word بيض bayḍ meaning "eggs" (cf. neighboring Keid "(egg)shells"). In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[11] to catalogue and standardize proper names for stars. The WGSN approved the name Beid for this star on 12 September 2016 and it is now so included in the List of IAU-approved Star Names.[10]

In Chinese, 九州殊口 (Jiǔ Zhōu Shū Kǒu), meaning Interpreters of Nine Dialects, refers to an asterism consisting of Omicron1 Eridani, 39 Eridani, Xi Eridani, Nu Eridani, 56 Eridani and 55 Eridani.[12] Consequently, the Chinese name for Omicron1 Eridani itself is 九州殊口二 (Jiǔ Zhōu Shū Kǒu èr, إنگليزية: the Second Star of Interpreters of Nine Dialects).[13]


الخصائص

قدره الضوئي الظاهري 4,4 ومن الفئة الطيفية F2 وبعده عن الأرض نحو 277 سنة ضوئية وهو واحد من عدد من النجوم أطلق عليها العرب اسم (البيض).

Omicron1 Eridani is an evolved F-type giant star with a stellar classification of F0 III.[4] It is a Delta Scuti variable star that undergoes non-radial pulsations,[5] with a variation of just 0.03 magnitude over a period of 0.0747 days.[14] The star is spinning rapidly with a projected rotational velocity of 108.1 km/s[7] and a rotation period of less than around 1.9 days.[5] This is creating an equatorial bulge that is 11% wider than the polar radius.[15] Omicron1 Eridani has nearly double the mass of the Sun, 3.7 times the Sun's radius, and shines with 27 times the solar luminosity[5] from an outer atmosphere at an effective temperature of 6,963 K.[4]

المراجع

  1. ^ MAST: Barbara A. Mikulski Archive for Space Telescopes, Space Telescope Science Institute, https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html, retrieved on 3 September 2022. 
  2. ^ أ ب ت ث ج van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V. 
  3. ^ أ ب ت ث Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data, Bibcode: 1986EgUBV........0M. 
  4. ^ أ ب ت ث ج Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal 132 (1): 161–170, doi:10.1086/504637, Bibcode: 2006AJ....132..161G. 
  5. ^ أ ب ت ث ج ح خ Balona, Luis A. (October 2000), "The δ Scuti star 38 o1 Eri", Monthly Notices of the Royal Astronomical Society 318 (1): 289–293, doi:10.1046/j.1365-8711.2000.03776.x, Bibcode: 2000MNRAS.318..289B. 
  6. ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A. 
  7. ^ أ ب Schröder, C.; Reiners, Ansgar; Schmitt, Jürgen H. M. M. (January 2009), "Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo", Astronomy and Astrophysics 493 (3): 1099–1107, doi:10.1051/0004-6361:200810377, Bibcode: 2009A&A...493.1099S 
  8. ^ قالب:Cite simbad
  9. ^ Davis, George A. (1944), "The pronunciations, derivations, and meanings of a selected list of star names", Popular Astronomy 52: 8–30, Bibcode: 1944PA.....52....8D. 
  10. ^ أ ب Naming Stars, IAU.org, https://www.iau.org/public/themes/naming_stars/, retrieved on 16 December 2017. 
  11. ^ IAU Division C Working Group on Star Names (WGSN), International Astronomical Union, https://www.iau.org/science/scientific_bodies/working_groups/280/, retrieved on 22 May 2016. 
  12. ^ (in صينية) 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.
  13. ^ (in صينية) 香港太空館 - 研究資源 - 亮星中英對照表 Archived 2010-08-11 at the Wayback Machine, Hong Kong Space Museum. Accessed on line November 23, 2010.
  14. ^ Rodríguez, E.; López-González, M. J.; López de Coca, P. (June 2000), "A revised catalogue of δ Sct stars", Astronomy and Astrophysics Supplement 144 (3): 469–474, doi:10.1051/aas:2000221, Bibcode: 2000A&AS..144..469R. 
  15. ^ Van Belle, Gerard T. (2012), "Interferometric observations of rapidly rotating stars", The Astronomy and Astrophysics Review 20 (1): 51, doi:10.1007/s00159-012-0051-2, Bibcode: 2012A&ARv..20...51V. 

انظر أيضا

المصادر

  • مؤمن, عبد الأمير (2006). قاموس دار العلم الفلكي. بيروت، لبنان: دار العلم للملايين. {{cite book}}: Cite has empty unknown parameter: |طبعة أولى coauthors= (help)

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