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The pre-main-sequence binary HK Ori: spectro-astrometry and EXPORT data

Baines, D. and Oudmaijer, R. D. and Mora, A. and Eiroa, C. and Porter, J. M. and Merín, B. and Montesinos, B. and de Winter, D. and Cameron, A. and Davies, J. K. and Deeg, H. J. and Ferlet, R. and Grady, C. A. and Harris, A. W. and Hoare, M. G. and Horne, K. and Lumsden, S. L. and Miranda, L. F. and Penny, A. and Quirrenbach, A. (2004) The pre-main-sequence binary HK Ori: spectro-astrometry and EXPORT data. Monthly Notices of the Royal Astronomical Society, 353 (2), pp. 697-704.

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Abstract

In this paper we present multi-epoch observations of the pre-main-sequence binary HK Ori. These data have been drawn from the EXPORT data base and are complemented by high-quality spectro-astrometric data of the system. The spectroscopic data appear to be very well represented by a combination of an A dwarf star spectrum superposed on a (sub)giant G-type spectrum. The radial velocity of the system is consistent with previous determinations, and does not reveal binary motion, as expected for a wide binary. The spectral, photometric and polarimetric properties and variability of the system indicate that the active object in the system is a T Tauri star with UX Ori characteristics. The spectro-astrometry of HK Ori is sensitive down to milliarcsecond scales and confirms the speckle interferometric results from Leinert et al. The spectro-astrometry allows the identification, with fair certainty, of the active star within the binary, which we suggest to be a G-type T Tauri star based on its spectral characteristics.

Item URL in elib:https://elib.dlr.de/10961/
Document Type:Article
Additional Information: LIDO-Berichtsjahr=2004,
Title:The pre-main-sequence binary HK Ori: spectro-astrometry and EXPORT data
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Baines, D.U.K. Gemini Support Group,Dept. of Astrophysics, Oxford University, Oxford, UK; School of Physics and Astronomy, University of Leeds, Leeds, UKUNSPECIFIED
Oudmaijer, R. D.School of Physics and Astronomy, University of Leeds, Leeds, UKUNSPECIFIED
Mora, A.Departamento de Fisica Teórica, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, SpainUNSPECIFIED
Eiroa, C.Departamento de Fisica Teórica, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, SpainUNSPECIFIED
Porter, J. M.Astrophysics Research Institute, Liverpool John Moores University, Birkenhead, UKUNSPECIFIED
Merín, B.Laboratorio de Astrofisica Espacial y Fisica Fundamental, Madrid, SpainUNSPECIFIED
Montesinos, B.Laboratorio de Astrofisica Espacial y Fisica Fundamental, Madrid, Spain; Instituto de Astrofisica de Andalucia-CSIC, Granada, SpainUNSPECIFIED
de Winter, D.TNO/TPD-Space Instrumentation, Delft, The NetherlandsUNSPECIFIED
Cameron, A.Department of Physics and Astronomy, University of St. Andrews, St. Andrews, Scotland, UKUNSPECIFIED
Davies, J. K.Astronomy Technology Center, Royal Observatory, Edinburgh, UKUNSPECIFIED
Deeg, H. J.Instituto de Astrofisica de Canarias, La Laguna, Tenerife, SpainUNSPECIFIED
Ferlet, R.CNRS, Institute d'Astrophysique de Paris, Paris, FranceUNSPECIFIED
Grady, C. A.NOAO/STIS, Goddard Space Flight Center, Greenbelt, MD, USAUNSPECIFIED
Harris, A. W.UNSPECIFIEDUNSPECIFIED
Hoare, M. G.School of Physics and Astronomy, University of Leeds, Leeds, UKUNSPECIFIED
Horne, K.Department of Physics and Astronomy, University of St. Andrews, St. Andrews, Scotland, UKUNSPECIFIED
Lumsden, S. L.School of Physics and Astronomy, University of Leeds, Leeds, UKUNSPECIFIED
Miranda, L. F.Instituto de Astrofisica de Andalucia-CSIC, Granada, SpainUNSPECIFIED
Penny, A.Rutherford Appleton Laboratory, Oxfordshire, UKUNSPECIFIED
Quirrenbach, A.Sterrewacht Leiden, Leiden, The NetherlandsUNSPECIFIED
Date:2004
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:353
Page Range:pp. 697-704
Status:Published
Keywords:techniques: spectroscopic, binaries: spectroscopic, stars: individual: HK Ori, stars: pre-main-sequence
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):UNSPECIFIED
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Deposited By: DLR-Beauftragter, elib
Deposited On:08 Dec 2005
Last Modified:14 Jan 2010 16:34

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