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Title: Hubble Space Telescope imaging and spectroscopy of the sirius-like triple star system HD 217411
Authors: Holberg, J. B.
Casewell, Sarah L.
Bond, H. E.
Burleigh, M. R.
Barstow, M. A.
First Published: 8-Sep-2014
Publisher: Oxford University Press (OUP)
Citation: Monthly Notices Of The Royal Astronomical Society, 2014, 444 (3), pp. 2022-2030 (9)
Abstract: We present Hubble Space Telescope imaging and spectroscopy of HD 217411, a G3 V star associated with the extreme ultraviolet (UV) excess source (EUV 2RE J2300­­–07.0). This star is revealed to be a triple system with a G 3V primary (HD 217411 A) separated by ∼1.1 arcsec from a secondary that is in turn composed of an unresolved K0 V star (HD 217411 Ba) and a hot DA white dwarf (HD 217411 Bb). The hot white dwarf dominates the UV flux of the system. However, it is in turn dominated by the K0 V component beyond 3000 Å. A revised distance of 143 pc is estimated for the system. A low level photometric modulation having a period of 0.61 d has also been observed in this system along with a rotational velocity of the order of 60 km s−1 in the K0 V star. Together both observations point to a possible wind induced spin-up of the K0 V star during the AGB phase of the white dwarf. The nature of all three components is discussed as are constraints on the orbits, system age and evolution.
DOI Link: 10.1093/mnras/stu1431
ISSN: 0035-8711
eISSN: 1365-2966
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. The file associated with this record is distributed under the Creative Commons “Attribution Non-Commercial No Derivatives” licence, further details of which can be found via the following link:
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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