The AB Doradus System Revisited: The Dynamical Mass of AB Dor A

The AB Doradus System Revisited: The Dynamical Mass of AB Dor A
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重温 AB Doradus 系统:AB Doradus 的动态质量

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发表时间:
2010
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通讯作者:
J. Reynolds
J. Reynolds
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作者:
J. Guirado;I. Martí;J. Marcaide;L. Close;J. Lestrade;D. Jauncey;S. Jiménez;Dayton L. Jones;R. A. Preston;J. Reynolds

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我们报道了四重预主序列(PMS)系统AB Doradus的新的射电干涉观测。通过这些观测,结合现有的VLT近红外相对天体测量,我们改进了对该系统动力学质量的估计。特别是,我们发现AB DOOR A和AB DOOR C的组元质量分别为0:86̇0:09 Mˇ和0:090̇0:003 Mˇ。这些动态质量,再加上温度和光度,可以与理论恒星模型进行比较。在低质量年轻恒星演化模型的校准方面,AB Dor C的情况已经得到了广泛的报道,J.C.Guirado,I.Martı́-Vdal,J.M.Marcaide和S.Jiménez-Monferrer University de Valencia,Moliner博士50,46100 Burjassot,西班牙巴伦西亚,电子邮件:Jose.C.Guirado@uv.es,J.M.Marcaide@uv.es,Sergio.jimenez@uv.es I.Martı́-Vidal Max-Planck-Institut Für Radio天文,Auf Dem HüGel 69,D-53121 Bonn,德国电子邮件:imartiv@mifr-bonn.mpg.de L.M.Close Steward天文台,亚利桑那州图森市,亚利桑那州85721,美国,电子邮件:lClose@as.arizona.edu J.-F.莱斯特雷德天文台巴黎天文台/莱尔马,L观测台61,75014,法国巴黎,电子邮件:jean-franccois.lestrade@obspm.fr D.L.Jauncey和J.E.Reynold澳大利亚望远镜国家设施,P.O.Box 76,Eping,N西南2121,澳大利亚约翰.雷诺兹@atnf.csiro.au D.L.Jones和R.A.Preston喷气推进实验室,地址:加州帕萨迪纳市橡树林路4800号,邮编:91109,美国邮编:Dayton.jones@jpl.nasa.gov,rap@sgra.jpl.nasa.gov J.M.Diego等人。(主编),《西班牙天体物理学概要》第五期,天体物理和空间科学论文集,DOI 10.1007/978-3-642-11250-8 13,c Springer-Verlag柏林,海德堡,2019139 140,J.C.Guirado等人。在之前的研究中。在这一贡献中,我们比较了AB Dor A的测量性质与几个PMS恒星的太阳组成模型。在这个比较中使用的模型预测动力学质量在引用的不确定范围内。
We report new radio interferometric observations of the quadruple premain-sequence (PMS) system AB Doradus. From these observations, combined with existing VLT near-infrared relative astrometry, we have refined the estimates of the dynamical masses of the system. In particular, we find component masses of 0:86 ̇ 0:09 Mˇ and 0:090 ̇ 0:003 Mˇ for AB Dor A and AB Dor C, respectively. These dynamical masses, coupled with temperatures and luminosities, allow for comparison with theoretical stellar models. The case of AB Dor C, in terms of calibration of evolutionary models of low-mass young stars has been widely reported J.C. Guirado, I. Martı́-Vidal, J.M. Marcaide, and S. Jiménez-Monferrer Universidad de Valencia, Dr. Moliner 50, 46100 Burjassot, Valencia, Spain e-mail: Jose.C.Guirado@uv.es, J.M.Marcaide@uv.es, sergio.jimenez@uv.es I. Martı́-Vidal Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany e-mail: imartiv@mpifr-bonn.mpg.de L.M. Close Steward Observatory, University of Arizona, Tucson, Arizona 85721, USA e-mail: lclose@as.arizona.edu J.-F. Lestrade Observatoire de Paris/LERMA, Rue de l’Observatoire 61, 75014 Paris, France e-mail: jean-francois.lestrade@obspm.fr D.L. Jauncey and J.E. Reynolds Australian Telescope National Facility, P.O. Box 76, Epping, NSW 2121, Australia e-mail: David.Jauncey@atnf.csiro.au, John.Reynolds@atnf.csiro.au D.L. Jones and R.A. Preston Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA e-mail: dayton.jones@jpl.nasa.gov, rap@sgra.jpl.nasa.gov J.M. Diego et al. (eds.), Highlights of Spanish Astrophysics V, Astrophysics and Space Science Proceedings, DOI 10.1007/978-3-642-11250-8 13, c Springer-Verlag Berlin Heidelberg 2010 139 140 J.C. Guirado et al. in previous studies. In this contribution, we compare the measured properties of AB Dor A with several solar-composition models for PMS stars. The models used in this comparison predict the dynamical mass to within the quoted uncertainties.