مجال التميز |
تميز دراسي و بحثي |
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البحوث المنشورة |
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البحث (1): |
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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. |
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المؤتمرات العلمية: |
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المؤتمر (1): |
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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: |
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المؤتمر (2): |
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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: |
سميرة سنيد محمد الحربي
دكتوراه
العلوم والتقنية
University of Manchester