Electronic Resource
Probing dusty circumstellar environments with polarimetric aperture-masking interferometry
| العنوان: | Probing dusty circumstellar environments with polarimetric aperture-masking interferometry |
|---|---|
| المؤلفون: | Norris, Barnaby R M, Tuthill, Peter G, Lacour, Sylvestre, Zijlstra, Albert A, Lykou, Foteini, Evans, Thomas M, Stewart, Paul, Bedding, Timothy Russell, Guyon, Olivier, Martinache, Frantz, Ireland, Michael |
| المصدر: | Proceedings of SPIE - The International Society for Optical Engineering |
| بيانات النشر: | SPIE - The International Society for Optical Engineering 2012 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | Aperture-masking interferometry allows diffraction-limited images to be recovered despite the turbulent atmosphere. Here, this approach has been combined with polarimetry to form a novel technique allowing the dusty environments of mass-losing stars (so-called AGB stars) and proto-planetary and debris disks to be imaged, the characterisation of which is key to understanding the recycling of matter and the formation of new planetary systems. Polarimetric aperture-masking interferometry produces images by exploiting the fact that starlight scattered by circumstellar dust becomes strongly polarised. Essentially, aperture-masking allows access to the small spatial scales (∼10mas) necessary while polarimetry allows light from the dust and star to be differentiated. Furthermore, measurements at multiple wavelengths allow dust grain sizes to be calculated using Mie scattering theory. Excellent results have already been obtained at near-IR wavelengths using the NACO instrument at the VLT. The next step is to leverage the higher spatial resolution and polarisation signal found in the visible, rather than near-IR. To this end, a new instrument allowing precision polarimetric aperture masking interferometry at 600-800nm is being developed for an 8m class telescope, details of which will also be presented. |
| مصطلحات الفهرس: | Keywords: AGB stars; Aperture masking interferometry; Circumstellar; Circumstellar dust; Debris disk; Diffraction limited; Dust grains; Mie scattering theory; Multiple wavelengths; Near-IR; New instrument; Novel techniques; Optical interferometric polarimetries; Op AGB stars; Aperture masking; Optical interferometric polarimetry; Optical interferometry; Transition disks, Conference paper |
| URL: | Optical and Infrared Interferometry III |
| الاتاحة: | Open access content. Open access content |
| ملاحظة: | Amsterdam |
| Other Numbers: | AUANP oai:openresearch-repository.anu.edu.au:1885/67240 9780819491466 1291793964 |
| المصدر المساهم: | AUSTRALIAN NAT UNIV - PRINT REPOSITORY From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1291793964 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |