Feasibility Study of Lense-Thirring Precession in LS I +61303

Abstract

Very recent analysis of the radio spectral index and high energy observations have shown that the two-peak accretion/ejection microquasar model applies for LSI+61303. The fast variations of the position angle observed with MERLIN and confirmed by consecutive VLBA images must therefore be explained in the context of the microquasar scenario. We calculate what could be the precessional period for the accretion disk in LSI+61303 under tidal forces of the Be star (P_{tidal-forces}) or under the effect of frame dragging produced by the rotation of the compact object (P_{Lense-Thirring}). P_{tidal-forces}$ismorethanoneyear.P_{Lense-Thirring}dependsonthetruncatedradiusoftheaccretiondisk,$R_{tr}$.Wedetermined{R}_{tr}=300r_{g}forobservedQPOat2Hz.Thisvalueismuchabovethefew$r_g$, where the Bardeen-Petterson effect should align the midplane of the disk. For this truncated radius of the accretion disk P_{Lense-Thirring} for a slow rotator results in a few days. Therefore, Lense-Thirring precession induced by a slowly rotating compact object could be compatible with the daily variations of the ejecta angle observed in LSI+61303.

6 pages, 5 figures, accepted for publication in Astronomy and Astrophysics

References in corpus (8)

• Global General Relativistic MHD Simulation of a Tilted Black-Hole Accretion Disk
• Periodic very high energy gamma-ray emission from LS I +61 303 observed with the MAGIC telescope
• INTEGRAL and XMM-Newton observations of LSI +61 303
• Warping and precession in galactic and extragalactic accretion disks
• The 2000 Periastron Passage of PSR B1259-63
• Correlated X-ray and Very High Energy emission in the gamma-ray binary LS I +61 303
• Radio Spectral Index Analysis and Classes of Ejection in LS I +61 303
• On the correlation between the X-ray and gamma-ray emission in TeV blazars

Cited by in corpus (15)

• Precession-induced Variability in AGN Jets and OJ 287
• VERITAS Observations of the TeV Binary LS I +61 303 During 2008-2010
• VLBA images of the precessing jet of LSI+61303
• Long-term periodicity in LSI+61303 as beat frequency between orbital and precessional rate
• Long-term X-ray monitoring of LS I +61 303: analysis of spectral variability and flares
• Intrinsic physical properties and Doppler boosting effects in LSI+61303
• The twisted jets of Circinus X-1
• H-alpha observations of the gamma-ray-emitting Be/X-ray binary LSI+61303: orbital modulation, disk truncation, and long-term variability
• V4641 Sgr: a candidate precessing microblazar
• Long-term OVRO monitoring of LSI+61303: confirmation of the two close periodicities
• Evidence for periodic accretion-ejection in LSI+61303
• Limitations in Testing the Lense-Thirring Effect with LAGEOS and the Newly Launched Geodetic Satellite LARES 2
• A Precessing Jet Scenario for the Multi-Wavelength Long-Term Modulation of LS I +61${}^{\circ }$303
• Implications of the radio spectral index transition in LS I +61°303 for its INTEGRAL data analysis
• Rapid X-ray variability of the gamma-ray binary LS I+61 303