A systematic survey of grain growth in discs around post-AGB binaries with PACS and SPIRE photometry. Issue Volume 14:Issue S343(2019) (August 2018)

• Record Type: Journal Article
• Authors: Dsilva, K.; Van Winckel, H.; Kluska, J.
• Editors: Kerschbaum, Franz; Groenewegen, Martin; Olofsson, Hans
• Is Part Of: Proceedings of the International Astronomical Union. Volume 14:Issue S343(2019)
• Page Start: 387
• Page End: 388
• Publication Date: 2018-08
• Subjects: stars: AGB and post-AGB, -- circumstellar matter, -- binaries: general, -- techniques: photometric, -- infrared: stars; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921318006968
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: Post-AGB stars are the final stage of evolution of low-intermediate mass stars (M < 8 Mʘ ). Those in binary systems have stable circumbinary discs. Using data from Herschel (PACS/SPIRE), we extend the SEDs of 50 galactic post-AGB binary systems to sub-millimetre wavelengths and use the slope of the SED as a diagnostic tool to probe the presence of large grains. Using a Monte Carlo radiative transfer code (MCMax), we create a large grid of models to quantify the observed spectral indices, and use the presence of large grains in the disc as a proxy for evolution.