Cool dwarfs in wide multiple systems. Paper 3: Two common-proper-motion, late-type stars separated by over 11 arcmin

Autor:	Caballero, J. A., Genebriera, J., Miret, F. X., Tobal, T., Cairol, J.
Rok vydání:	2012
Předmět:	Astrophysics - Galaxy Astrophysics
Druh dokumentu:	Working Paper
Popis:	LP 209-28 and LP 209-27 have similar proper motions as tabulated by several catalogues. Using seven astrometric epochs spanning 59 years, we confirm a common tangential velocity by measuring a constant angular separation of rho = 666.62+/-0.09 arcsec. Accurate SDSS and 2MASS photometry indicates that they are normal dwarfs of approximate spectral types K7 V and M3 V. However, from their apparent magnitudes, both LP 209-28 and LP 209-27 are located at 200-250 pc, from where one can deduce an astonishing projected physical separation of 0.6-0.8 pc. The system Koenigstuhl 6 AB represents another world record among the least-bound systems with low-mass star components. Comment: The Observatory, in press, to appear in August 2012
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1205.5572 Zobrazit plný text záznamu View this record from Arxiv