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