Improved orbital solution and masses for the very low-mass multiple system LHS 1070 - AstrophysicsReportar como inadecuado




Improved orbital solution and masses for the very low-mass multiple system LHS 1070 - Astrophysics - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: We present a refined orbital solution for the components A, B, and C of thenearby late-M type multiple system LHS 1070. By combining astrometricdatapoints from NACO-VLT, CIAO-SUBARU, and PUEO-CFHT, as well as a radialvelocity measurement from the newly commissioned near infrared high-resolutionspectrograph CRIRES-VLT, we achieve a very precise orbital solution for the Band C components and a first realistic constraint on the much longer orbit ofthe A-BC system. Both orbits appear to be co-planar. Masses for the B and Ccomponents calculated from the new orbital solution M B+C = 0.157 +- 0.009M sun are in excellent agreement with theoretical models, but do not matchempirical mass-luminosity tracks. The preliminary orbit of the A-BC systemreveals no mass excess for the A component, giving no indication for apreviously proposed fourth D component in LHS 1070.



Autor: A. Seifahrt 1 and 2, T. Roell 2, R. Neuhaeuser 2, A. Reiners 1, F. Kerber 3 H. U. Kaeufl 3, R. Siebenmorgen 3, A. Smette 4 1 Univ

Fuente: https://arxiv.org/







Documentos relacionados