2023AJ....166..161G

Query : 2023AJ....166..161G

2023AJ....166..161G - Astron. J., 166, 161 (2023/October-0)

TU Tau B: The Peculiar “Eclipse” of a Possible Proto-barium Giant.

GRAY R.O., CORBALLY C.J., BRILEY M.M., McKAY A., SIMS F., BOYD D., BOUSSIN C., McGAHEE C.E., BUCHHEIM R., WALKER G., IADEVAIA D., CEJUDO FERNANDEZ D., LEMAY D., MARTIN J., GRUBB J., STIEWING A., DAGLEN J., SHANK K., ANDREWS S., BARNHARDT N., CLARK R., CORMAN H., GOMES S., JONNALAGADDA A., McDARIES T., MILLS A., NEWSOM W., SLATE A. and WATTS M.

Abstract (from CDS):

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.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Eclipsing binary stars - Barium stars - A stars - Carbon stars - N stars - S-process

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* TU Tau C* 05 45 13.7252280696 +24 25 12.448555140 12.69 11.33 8.46     C-N4+ 127 0
2 TYC 1866-990-1 * 05 45 24.3590451792 +24 31 39.060935256   11.70 10.81     ~ 1 0
3 TYC 1866-2430-1 * 05 45 29.1009469584 +24 29 44.887684524   10.74 9.71     ~ 1 0
4 HD 38334 ** 05 45 56.5876048368 +24 13 29.723388240   8.14 7.92     A3 14 0

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