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ANOMALOUS LOW STATES AND LONG TERM VARlABILITY IN THE BLACK HOLE BINARY LMC X-3
| Content Provider | Semantic Scholar |
|---|---|
| Author | Patricia Boyd, Timothy D. |
| Copyright Year | 2012 |
| Abstract | Rossi X-my Timing Explorer observations of the black hole binary LMC X-3 reveal an extended very low X-ray state lasting from 2003 December 13 lWtil 2004 March 18, unprecedented both in terms of its low luminosity (>15 times fainter than ever before seen in this source) and long duration (~3 times longer than a typical low/hard state excursion). During this event little to no source variability is observed on timescales of ""'hours-weeks, and the X-ray spectrum implies an upper limit of 1.2 x 1035 erg S-l, Five years later another extended low state occurs, lasting from 2008 December 11 until 2009 June 17. This event lasts nearly twice as long as the first, and while significant variability is observed, the source remains reliably in the low/hard spectral state for the ~ 188 day duration. These episodes share some characteristics with the "ano!llalous low states" in the neutron star binary Her X-I. The average period and amplitude of the V"Miability of LMC X-3 have different values between these episodes. We characterize the long-term variability of L11C X-3 before and after the two events using com·entional and nonlinear time series analysis methods, and show that , as is the case in Her X-I, the characteristic amplitude of the variability is related to its characteristic timescale. Furthermore, the relation is in the same direction in' both systems. This suggests that a similar mechanism gives rise to the long-term variability, whieh in the case of Her X-I 1S reliably modeled with a tilted, warped precessing accretion disk. Subject headings: accretion, accretion disks binaries: close .. black hole physics stars: individual (LI\IC X-3) X-rays: binaries |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20120015646.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Black Hole CCL16 gene Diagnostic radiologic examination Excess-3 GUCY2C protein, human Heart rate variability Little man computer Medical Subject Headings Neutrons Nonlinear system Rajiformes Spatial variability Stars, Celestial Time series |
| Content Type | Text |
| Resource Type | Article |
