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Determination of intrinsic color indices of globular clusters and the coefficients of differential absorption
Other Title(s)
تعيين العاملات اللونية الذاتية للحشود الكروية و معاملات الامتصاص الجزئية
Joint Authors
Sharaf, Muhammad Adil Abd al-Aziz
Juharji, Adnan Abd Allah
al-Mliaky, Yasin M.
Mallawi, Abd al-Rahman
Basurah, Hasan M.
Source
Journal of King Abdulaziz University : Sciences
Issue
Vol. 13, Issue 1 (30 Jun. 2001), pp.31-48, 18 p.
Publisher
King Abdulaziz University Scientific Publishing Center
Publication Date
2001-06-30
Country of Publication
Saudi Arabia
No. of Pages
18
Main Subjects
Topics
Abstract AR
لقد تم في هذا البحث استنتاج علاقة خطية للمعامل اللوني المرصود للحشود الكروية في مجرتنا و ذلك باستخدام نموذج مبسط لطبقة الامتصاص المجرية o كما تمكنا باستخدام معيار الاختيار و الحل من تعيين معاملات اللون للحشود الكروية بدقة عالية جدا و هي : (B-v)o = 0.582344 mag.
; (U-B)o = 0.033909 mag; (V-I)o = 0.798231 mag; (V-R)o = 0.413043 mag بالإضافة إلى أنه من ميل هذه العلاقة الخطية قمنا بحساب (1) السمك الحقيقي لطبقة الامتصاص المجري و التي تصل قيمتها 200 PC و هي نفس القيمة المختارة عالميا، (2) قيم معاملات الامتصاص الجزئي و هي : ku-kb = 0.724 mag / kpc, kv-ki = 0.81549 mag / kpc and kv-kr = 0.33189 mag / kpc.
Abstract EN
A simple model for the galactic absorbing layer is used to derive linear representation of the observed color index of a globular cluster.
Selection and solution criteria enable us to determine very accurately the mean intrinsic color indices of globular clusters as (B-V)o = 0.582344 mag; (U-B)o = 0.033909 mag; (V-I)o = 0.798231 mag; (V- R)o 0.413043 mag.
Also, from the slope of such linear representation we compute : (1) the effective thickness of the galactic absorbing layer which turn out to be 200 pc, is the value currently adopted, and (2) the values of the coefficients of differential absorption as ku kb = 0.724 mag / kpc, kv ki = 0.81549 mag / kpc and kv kr = 0.33189 mag/kpc.
American Psychological Association (APA)
al-Mliaky, Yasin M.& Sharaf, Muhammad Adil Abd al-Aziz& Mallawi, Abd al-Rahman& Basurah, Hasan M.& Juharji, Adnan Abd Allah. 2001. Determination of intrinsic color indices of globular clusters and the coefficients of differential absorption. Journal of King Abdulaziz University : Sciences،Vol. 13, no. 1, pp.31-48.
https://search.emarefa.net/detail/BIM-370534
Modern Language Association (MLA)
al-Mliaky, Yasin M.…[et al.]. Determination of intrinsic color indices of globular clusters and the coefficients of differential absorption. Journal of King Abdulaziz University : Sciences Vol. 13, no. 1 (2001), pp.31-48.
https://search.emarefa.net/detail/BIM-370534
American Medical Association (AMA)
al-Mliaky, Yasin M.& Sharaf, Muhammad Adil Abd al-Aziz& Mallawi, Abd al-Rahman& Basurah, Hasan M.& Juharji, Adnan Abd Allah. Determination of intrinsic color indices of globular clusters and the coefficients of differential absorption. Journal of King Abdulaziz University : Sciences. 2001. Vol. 13, no. 1, pp.31-48.
https://search.emarefa.net/detail/BIM-370534
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 46-47
Record ID
BIM-370534