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Cheshire Cat 1 nfw model - inc geo-z systems - but not image G2

  • Writer: jackychc
    jackychc
  • Jul 25, 2019
  • 2 min read

Everything is par with previous 1 nfw model run - posted https://www.jackyastronomy.org/post/cheshire-cat-1-nfw-model-with-geo-z-system



except that image G2, which located somewhat between two BCGs is not used as constrain.


Without using G2, you can see there is a major difference in the mass distribution.

Left: all lensed images used ; Right; all except G2


And this model's mass distribution is very close to 1nfw - spec-z systems only model.




In this model run :

nfw: 9e13 solar mass ; position : x 2.29; y 0.7.

jaffe 400 for left eye

jaffe 200 for right eye

all other members: 158


In the all geo-z model:

nfw: 6.5 e13 solar masses ; position x 1.54 ; y -0.8

jaffe 419 for left eye

jaffe 464 for right eye

all other member : 150 *Note: hit the lower bound i set to glafic.


in the fiducial spec-z only model:

nfw: 1e14 solar mass, x:2.3 y:0.73

jaffe 402 for left eye

jaffe 147 for right eye

all other member : 150: *Note: hit the lower bound i set to glafic.


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For spec-z system, I use spec-z in producing this model, for those that don't, I let glafic fit the best result.

In this run, the fitted redshifts: E1, E2 ,E3 ; z=2.2638 (same as fiducial run)

G1, G3 ; z=2.2531 (in fiducial run, it is z=2.02)

Z1, Z2 ; z=1.326 ( in fiducial run it is z=1.38)

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In this model run, most of the delens-relens image provide good result.

For A:

Critical Curve

A1:

A2

A3:


All produce satisfactory positional agreement.


Geo-z is consistent with spec-z


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B:

Critical Curve:

B1 : It doesn't produce an counterpart in the right hand side. which is good.

Delens relens left part in the middle of the arc

right part, middle image

right part, upper image



Geo-z is also consistent with spec-z


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C:


C1a ; brightest spot in the lower right

C1b : upper left


C2a: lower right


C2b lower left of C2a


Geo-z is consistent with spec-z


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For E: z=2.2638


E1:

E3:


both consistent with data


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For G : z= 2.2531


G1:


in the relens result: G2 position is ~0.9 arcsec from data(green circle)

G2 : relens:

Relens of G2 is poor in positional agreement

G3 relens:

similar to G1

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For Z : z=1.326



Z1

Z2

Both relens of Z1 and Z2 produce a dim counterpart very close to right eye


The brightness of Z2 is comparable to predicted brightness of the counterimage near the eye.

However, I checked 390nm filter image, where Z2 is clearly visible. I can't find the counterpart Z3



 
 
 

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©2019 by Jacky Astronomy Research.

Some images are owned by respective observatories or telescope, not by me

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