سميرة سنيد محمد الحربي

 


      
 
الاسم الاول: 
سميرة
اسم العائلة: 
الحربي
الدرجة العلمية: 
دكتوراة
مجال الدراسة: 
العلوم والتقنية
المؤسسة التعليمية: 
University of Manchester

مجال التميز

تميز دراسي و بحثي

 

 

البحوث المنشورة

 

البحث (1):

 

عنوان البحث:

Flickering In AGB Stars: Probing The Nature Of Accreting Companions

رابط إلى البحث:

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تاريخ النشر:

19/01/2018

موجز عن البحث:

Binary companions to asymptotic giant branch (AGB) stars are an important aspect of their evolution. Few AGB companions have been detected, and in most cases it is difficult to distinguish between main-sequence and white dwarf companions. Detection of photometric flickering, a tracer of compact accretion discs around white dwarfs, can help identify the nature of these companions. In this work, we searched for flickering in four AGB stars suggested to have likely accreting companions. We found no signs for flickering in two targets: R Aqr and V1016 Cyg. Flickering was detected in the other two stars: Mira and Y Gem. We investigated the true nature of Mira’s companion using three different approaches. Our results for Mira strongly suggest that its companion is a white dwarf.

 

 

المؤتمرات العلمية:

 

المؤتمر (1):

 

عنوان المؤتمر:

Asymmetric Planetary Nebulae VII          

تاريخ الإنعقاد:

04/12/2017

مكان الإنعقاد:

Hong Kong

طبيعة المشاركة:

Oral presentation

عنوان المشاركة:

Flickering In AGB Stars: Probing The Nature Of Accreting Companions    Talk   

ملخص المشاركة:

Binary companions to asymptotic giant branch (AGB) stars are an important aspect of their evolution. Few AGB companions have been detected, and in most cases it is difficult to distinguish between main-sequence and white dwarf companions. Detection of photometric flickering, a tracer of compact accretion discs around white dwarfs, can help identify the nature of these companions. In this work, we searched for flickering in four AGB stars suggested to have likely accreting companions. We found no signs for flickering in two targets: R Aqr and V1016 Cyg. Flickering was detected in the other two stars: Mira and Y Gem.

الرابط:

Click here

 

 

المؤتمر (2):

 

عنوان المؤتمر:

Asymmetric Planetary Nebulae VII       

تاريخ الإنعقاد:

04/12/2017

مكان الإنعقاد:

Hong Kong

طبيعة المشاركة:

Poster presentation

عنوان المشاركة:

Probing The True Nature Of Mira’s Companion       

ملخص المشاركة:

Detection of photometric flickering, a tracer of compact accretion disks around white dwarfs, can help identify the nature of these companions. In this work, we searched for flickering at very low timescales (minutes or less) in the well-known AGB star: Mira. Flickering was detected in all light curves of Mira. We investigated the true nature of Mira's companion using three different approaches. Our results for Mira strongly suggest that its companion is a White dwarf.

الرابط:

Click here

المرفقالحجم
Conference Attendance Letter_0.pdf‏190.17 ك.بايت