The rms-flux relations in different branches in Cyg X-2

Autor:	Li, Z. B., Song, L. M., Qu, J. L., Lei, Y. J., Nie, J. Y., Zhang, C. M.
Rok vydání:	2012
Předmět:	Astrophysics - High Energy Astrophysical Phenomena
Druh dokumentu:	Working Paper
DOI:	10.1007/s10509-012-1086-6
Popis:	In this paper, the rms-flux (root mean square-flux) relation along the Z-track of the bright Z-Source Cyg X-2 is analyzed using the observational data of Rossi X-ray Timing Explorer (RXTE). Three types of rms-flux relations, i.e. positive, negative, and 'arch'-like correlations are found in different branches. The rms is positively correlated with flux in normal branch (NB), but anti-correlated in the vertical horizontal branch (VHB). The rms-flux relation shows an 'arch'-like shape in the horizontal branch (HB). We also try to explain this phenomenon using existing models. Comment: Accepted for publication in Astrophysics & Space Science
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1204.1849 Zobrazit plný text záznamu View this record from Arxiv