TU Tau B: The Peculiar "Eclipse" of a Possible Proto-barium Giant

Gray, Richard O. and Corbally, Christopher J. and Briley, Michael M. and McKay, Adam and Sims, Forrest and Boyd, David and Boussin, Christophe and McGahee, Courtney E. and Buchheim, Robert and Walker, Gary and Iadevaia, David and Fernandez, David Cejudo and Lemay, Damien and Martin, Jack and Grubb, Jim and Stiewing, Albert and Daglen, Joseph and Shank, Keith and Andrews, Sydney and Barnhardt, Nick and Clark, Rebekah and Corman, Hunter and Gomes, Sabina and Jonnalagadda, Agastya and McDaries, Theo and Mills, Ava and Newsom, Will and Slate, Andrew and Watts, Michael (2023) TU Tau B: The Peculiar "Eclipse" of a Possible Proto-barium Giant. The Astronomical Journal, 166 (4). p. 161. ISSN 0004-6256

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Official URL: https://doi.org/10.3847/1538-3881%2Facf1fe

Abstract

TU Tau (=HD 38218 = HIP 27135) is a binary system consisting of a C-N carbon star primary and an A-type secondary. We report on new photometry and spectroscopy which tracked the recent disappearance of the A-star secondary. The dimming of the A star was gradual and irregular, with one or more brief brightenings, implying the presence of nonhomogeneities in the carbon star outflow. We also present evidence that the A star is actively accreting s-process enriched material from the carbon star and suggest that it will therefore eventually evolve into a Barium giant. This is an important system as well because the A-type star can serve as a probe of the outer atmosphere of the carbon star.

Item Type:	Article
Subjects:	STM Library > Physics and Astronomy
Depositing User:	Managing Editor
Date Deposited:	15 Nov 2023 07:15
Last Modified:	15 Nov 2023 07:15
URI:	http://open.journal4submit.com/id/eprint/3229

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