A simple model for superluminal motion and state transition of microquasars
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A simple model for superluminal motion and state transition of microquasars. Huazhong University of Science and technology. Gong Biping. Bulk motion. M. Rees 1966. Mirabel et al., 1994, Nature, 371, 46. XTE J1550-564 in 2000 and 2002. 2002, Science, 298, 196. GRS 1915+105

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A simple model for superluminal motion and state transition of microquasars
A simple model for superluminal motion and state transition of microquasars

Huazhong University of Science and technology

Gong Biping


Bulk motion
Bulk motion of microquasars

M. Rees 1966



Xte j1550 564 in 2000 and 2002
XTE J1550-564 of microquasars in 2000 and 2002

2002, Science, 298, 196.


GRS 1915+105 of microquasars

in 1994 and 1997

2004, ARA&A, 42, 317.


Miller-Jones et al of microquasars

2005


Position angle variation
Position angle variation of microquasars

1999, ApJ, 511, 398.


Difficult questions on slm
Difficult questions on SLM of microquasars

(a) why the ratio of the displacement of the approaching blob to the receding blob is not a constant.

(b) why the receding jet appears later than the approaching jet in XTEJ1550-564 (for months) and GRS 1915+105 (for days).

(c) why deceleration appeared in XTE J1550-564 but not in GRS 1915+105.

(d) why the position angle changes 10 deg in 20-30 days in GRS 1915+105.

(e) why there is obvious oscillation in the receding blob.

(f) why 20% discrepancy in proper motion between the ejection of 1994 and 1997.

(g) why the size of condensations do not increase rapidly as expected from adiabatic expansion.


Other possibility

Other possibility? of microquasars

Bulk motion

precession



Jet precession model
Jet precession model of microquasars


Primary precession
Primary precession of microquasars



Nutation
Nutation of microquasars



(a) why the ratio of the displacement of the approaching blob to the receding blob is not a constant.

is not a constant under precession model

It is a constant under bulk motion


(b) why the receding jet appears later than the approaching jet in XTEJ1550-564 .



(d) why the decrease in flux density with angular separation from the core on GRS 1915+105 is remarkably similar with that of SS 433.

(e) why 20% discrepancy in proper motion between the ejection of 1994 and 1997.


(f) why the position angle changes 10 deg in 20-30 days in GRS 1915+105.

(g) why there is obvious oscillation in the receding blob.


Observations which are difficult to understand GRS 1915+105.

under the bulk motion scenario can be interpreted

by the jet precession model naturally.


The state evolution of grs 1915 105
The state evolution of GRS 1915+105 GRS 1915+105.

Fender et al. 2004


Fender et al. 2004 GRS 1915+105.


Structured jet GRS 1915+105.



Summary

Summary GRS 1915+105.

Simple

Unified

Easy to test



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