The Distance To The Hyades Cluster Based On Hubble Space Telescope Fine Guidance Sensor Parallaxes

dc.contributor.utaustinauthorMcArthur, B.en_US
dc.contributor.utaustinauthorBenedict, G. Fritzen_US
dc.contributor.utaustinauthorDuncombe, R. L.en_US
dc.contributor.utaustinauthorHemenway, P. D.en_US
dc.contributor.utaustinauthorJefferys, William H.en_US
dc.contributor.utaustinauthorKing, J. R.en_US
dc.contributor.utaustinauthorNelan, Eden_US
dc.contributor.utaustinauthorShelus, P. S.en_US
dc.contributor.utaustinauthorStory, D.en_US
dc.contributor.utaustinauthorWhipple, A.en_US
dc.creatorvanAltena, W. F.en_US
dc.creatorLu, C. L.en_US
dc.creatorLee, J. T.en_US
dc.creatorGirard, T. M.en_US
dc.creatorGuo, X.en_US
dc.creatorDeliyannis, C. P.en_US
dc.creatorPlatais, I.en_US
dc.creatorKozhurinaPlatais, V.en_US
dc.creatorMcArthur, B.en_US
dc.creatorBenedict, G. Fritzen_US
dc.creatorDuncombe, R. L.en_US
dc.creatorHemenway, P. D.en_US
dc.creatorJefferys, William H.en_US
dc.creatorKing, J. R.en_US
dc.creatorNelan, Eden_US
dc.creatorShelus, P. S.en_US
dc.creatorStory, D.en_US
dc.creatorWhipple, A.en_US
dc.creatorFranz, O. G.en_US
dc.creatorWasserman, L.en_US
dc.creatorFrederick, L. W.en_US
dc.creatorHanson, Russell B.en_US
dc.creatorKlemola, A. R.en_US
dc.creatorJones, B. F.en_US
dc.creatorMendez, R.en_US
dc.creatorTsay, W. S.en_US
dc.description.abstractTrigonometric parallax observations made with the Hubble Space Telescope (HST) Fine Guidance Sensor (FGS) 3 of seven Hyades members in six fields of view have been analyzed along with their proper motions to determine the distance to the cluster. Knowledge of the convergent point and mean proper motion of the Hyades is critical to the derivation of the distance to the center of the cluster. Depending on the choice of the proper-motion system, the derived cluster center distance varies by 9%. Adopting a reference distance of 46.1 pc or m - M = 3.32, which is derived from the ground-based parallaxes in the General Catalogue of Trigonometric Stellar Parallaxes (1995 edition), the FK5/PPM proper-motion system yields a distance 4% larger, while the Hanson system yields a distance 2% smaller. The HST FGS parallaxes reported here yield either a 14% or 5% larger distance, depending on the choice of the proper-motion system. Orbital parallaxes (Torres et al.) yield an average distance 4% larger than the reference distance. The variation in the distance derived from the HST data illustrates the importance of the proper-motion system and the individual proper motions to the derivation of the distance to the Hyades center; therefore, a full utilization of the HST FGS parallaxes awaits the establishment of an accurate and consistent proper-motion system.en_US
dc.description.sponsorshipNASA HST GTO, HF-1042.01-93A, HF-1046.01-93A, NAS526555en_US
dc.identifier.citationVan Altena, W. F., C-L. Lu, J. T. Lee, T. M. Girard, X. Guo, C. P. Deliyannis, I. Platais et al. "The Distance to the Hyades Cluster Based on Hubble Space Telescope Fine Guidance Sensor Parallaxes." The Astrophysical Journal Letters, Vol. 486, No. 2 (Sep., 1997): L123.en_US
dc.relation.ispartofserialAstrophysical Journalen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.subjectstars, distancesen_US
dc.subjectstars, fundamental parametersen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleThe Distance To The Hyades Cluster Based On Hubble Space Telescope Fine Guidance Sensor Parallaxesen_US

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