SLIDE 1
EXPLORING THE SOLUTION ZOO OF A SEMI-ANALYTICAL MHD MODEL FOR SELF-SIMILAR JETS
CHIARA CECCOBELLO
Compact Objects For All Lund Observatory, 10-11 February 2020
EXPLORING THE SOLUTION ZOO OF A SEMI-ANALYTICAL MHD MODEL FOR - - PowerPoint PPT Presentation
EXPLORING THE SOLUTION ZOO OF A SEMI-ANALYTICAL MHD MODEL FOR - - PowerPoint PPT Presentation
EXPLORING THE SOLUTION ZOO OF A SEMI-ANALYTICAL MHD MODEL FOR SELF-SIMILAR JETS C HIARA C ECCOBELLO Compact Objects For All Lund Observatory, 10-11 February 2020 AGN (PPNe) (YSOs) NSXRBs MAGNETARS BHXRBs a BH Xray
SLIDE 2
SLIDE 3
MOTIVATION
MAXI J1836-194
Russell et al. 2014
a BH Xray Binary example
This is the JET spectral BREAK: shock/acceleration region
SLIDE 4
X-RAYS X
- R
A Y / U V / O P T I C A L / I R RADIO OPTICAL/UV
SHOCK JET BREAK ACCELERATION REGION
Romero+2003, Markoff+2005, Yuan+2005, Belmont+2008, Zdziarski+2012,2014, Pepe+2015, …
MOTIVATION
a BH Xray Binary example
SLIDE 5
X-RAYS X
- R
A Y / U V / O P T I C A L / I R RADIO OPTICAL/UV
SHOCK JET BREAK ACCELERATION REGION
Romero+2003, Markoff+2005, Yuan+2005, Belmont+2008, Zdziarski+2012,2014, Pepe+2015, …
MOTIVATION
a BH Xray Binary example
Connors et al. 2017
…but even with more sophisticated radiation modelling, we still have major issues with
DEGENERACY
between classes of models!
SLIDE 6
X-RAYS X
- R
A Y / U V / O P T I C A L / I R RADIO OPTICAL/UV
SHOCK JET BREAK ACCELERATION REGION
Romero+2003, Markoff+2005, Yuan+2005, Belmont+2008, Zdziarski+2012,2014, Pepe+2015, …
MOTIVATION
a BH Xray Binary example
…but even with more sophisticated radiation modelling, we still have major issues with
DEGENERACY
between classes of models!
Ceccobello et al. 2018, Ceccobello et al. in prep.
Connors,.., CC, et al. 2017, Crumley, CC, et al. 2017, Lucchini et al. 2019, Lucchini,…,CC, at al. in prep, Kantzas,…,CC, et al. in prep.
SLIDE 7
THEORY THEORY 𝜜 z
^
𝜚
⨀
^
n
^
p LAUNCHING ACCELERATION COLLIMATION THE POLOIDAL DIRECTION THE NORMAL DIRECTION THE FORCE BALANCE ALONG…
IN A MHD MODEL OF AN OUTFLOW
☜
That is a streamline
it’s the path where the matter flows
SLIDE 8
THEORY THEORY 𝜜 z
LAUNCHING ACCELERATION COLLIMATION THE POLOIDAL DIRECTION THE NORMAL DIRECTION THE FORCE BALANCE ALONG…
IN A MHD MODEL OF AN OUTFLOW
⚠ ⚠ ⚠
Sonic Point Parker HD stellar wind model
SINGULAR SURFACES
SLOW ALFVEN FAST
SLIDE 9
THEORY THEORY
FAST ALFVEN SLOW Blandford & Payne 1982
Polko, Meier, Markoff (2014)
radial self-similar relativistic MHD jet with gravity
Vlahakis et al (2000) radial self-similar non-relativistic MHD jet with gravity
TO KEEP THE COMPUTATIONAL TIME SHORT WE NEED TO MAKE SOME APPROXIMATIONS…
SELF-SIMILARITY = STREAMLINES DON’T CROSS!
🚹 🚹 🚹
(modified) (modified)
SLIDE 10
METHOD
MFP? MSP? Alfven
M 2
θ
integrating TOWARDS the singularities
OLD APPROACH
SLIDE 11
METHOD
MFP? MSP? Alfven
M 2
θ
integrating TOWARDS the singularities
∆1
∆2
M2
MSP AP MFP integrating AWAY from the singularities
OLD APPROACH NEW APPROACH
Ceccobello et al. 2018 (REL), Ceccobello et al, in prep (NR)
SLIDE 12
RESULTS
A zoo of jet solutions
- 2
- 1
1 2
- 2
- 1
1 2 y x
- 2
- 1
1 2
- 2
- 1
1 2 y x
LIGHT JETS HEAVY JETS COLD(EST), HEAVY HOT(TEST), HEAVY COLD, LIGHT HOT, LIGHT
SLIDE 13
1010 1011 1012 1013 1014 1015
Frequency (Hz)
10−3 10−2 10−1
Flux density (Jy)
Sep 03
Sep 26 Oct 12 Oct 27
2011 Sep 03 (Hard) 2011 Sep 26 (HIMS) 2011 Oct 12 (Hard) 2011 Oct 27 (Hard)
- Russell et al. 2014
EVOLVING JET BREAK FREQUENCY
DETECTED IN XRB MAXI J1836-194
APPLICATIONS
+ Lorentz factor, density, magnetic field,…
SLIDE 14
CONCLUSIONS
We want to model jets from various sources We want a more accurate way to constrain the jet configuration that produces the radiation we see
A “fast” algorithm for an efficient and comprehensive exploration of the parameter space to directly fit the MHD properties of jets
Applications to relativistic sources, i.e. XRBs and AGN Applications to non-relativistic sources, i.e. PPNe and YSOs Coupling with a radiative code
MOTIVATION GOAL
Ceccobello et al. 2018, Ceccobello et al. in prep
WHAT’S NEXT
Markoff et al. 2005, Connors,.., CC, et al. 2017, Crumley, CC, et al. 2017, Lucchini et al. 2019, Lucchini,…,CC, at al. in prep, Kantzas,…,CC, et al. in prep.