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Profilo di velocità

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Profilo di velocità

Le curve di rotazione di velocità verso il raggio secondo la legge di Newton:

mv

2

/r = mM(<r)G

N

/r

2

Dentro un volume a densità costante

M  r

3

e v  r mentre ai margini M ~costante e

v  r

1/2

m

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Dark matter profile

(r) = r

0

/((r/R

s

)x(1+r/R

s

)

2

) profilo di Navarro-Frenk-White

soddisfa la relazione v(r).

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Bullet cluster

Rosa: gas riscaldato dalla collisione.

Materia luminosa separate.

'Dark matter' da gravitational lensing assieme alle galssie.

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Baryonic dark matter?

lum

~ 0.01 mentre

B

~ 0.04

Parte della DM è barionica.

- Mini BH? Emissione di  -ray da radiazione di Hawking - Nubi di gas extragalattico in cluster di galassie

- MACHO? Parte

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Lab CM

M

W

M

N

M

W

M

N

2

2

1 M v

E

W N

N W

N

W

M

M M

M v M

P

 

  

*

v = velocità del sole nella galassia ≈ 10

-3

CM M

N

M

W

Massimo rinculo

nel Lab v

P

*

P

*

KeV A

v M M

E P P

P

N

N

lab

2 2

2

2 4

2

*

* max

2

 ≈

Energia massima di rinculo di un nucleo

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σ ρ σ

ρ

W W

W W W

W

W W

v n

v M

v n

cm GeV

 Φ

 Φ

 Ω

 ⇒

Ndt dN

10 x 5 . 0 /

3 .

0

3 5

Rate di interazioni in un rivelatore

2 2

N F

M

G

σ Per M

W

= 100 GeV e A = 20

R ≈1÷10 / Tonnellata/ giorno

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8.8 σ 136 ±7

0.996 ±0.002 0.0194 ±0.0022

(2÷4) keV DAMA/NaI+ DAMA/LIBRA

DAMA/LIBRA (6 years)

7.2 σ 135 ±8

0.996 ±0.002 0.0180 ±0.0025

(2÷4) keV

7.4 σ 140 ±8

0.997 ±0.002 0.0134 ±0.0018

(2÷5) keV

6.5 σ 146 ±9

0.999 ±0.002 0.0098 ±0.0015

(2÷6) keV

5.5 σ 140 ±30

1.01 ±0.02 0.0215 ±0.0039

(2÷5) keV

5.0 σ 125 ±30

1.01 ±0.02 0.0252 ±0.0050

(2÷4) keV DAMA/NaI (7 years)

146 ±7 142 ±7 140 ±22

t0 (day)

8.9 σ 0.999 ±0.002

0.0116 ±0.0013 (2÷6) keV

9.3 σ 0.997 ±0.002

0.0149 ±0.0016 (2÷5) keV

6.3 σ 1.00 ±0.01

0.0200 ±0.0032 (2÷6) keV

C.L.

T=2 π / ω (yr) A (cpd/kg/keV)

8.8 σ 136 ±7

0.996 ±0.002 0.0194 ±0.0022

(2÷4) keV DAMA/NaI+ DAMA/LIBRA

DAMA/LIBRA (6 years)

7.2 σ 135 ±8

0.996 ±0.002 0.0180 ±0.0025

(2÷4) keV

7.4 σ 140 ±8

0.997 ±0.002 0.0134 ±0.0018

(2÷5) keV

6.5 σ 146 ±9

0.999 ±0.002 0.0098 ±0.0015

(2÷6) keV

5.5 σ 140 ±30

1.01 ±0.02 0.0215 ±0.0039

(2÷5) keV

5.0 σ 125 ±30

1.01 ±0.02 0.0252 ±0.0050

(2÷4) keV DAMA/NaI (7 years)

146 ±7 142 ±7 140 ±22

t0 (day)

8.9 σ 0.999 ±0.002

0.0116 ±0.0013 (2÷6) keV

9.3 σ 0.997 ±0.002

0.0149 ±0.0016 (2÷5) keV

6.3 σ 1.00 ±0.01

0.0200 ±0.0032 (2÷6) keV

C.L.

T=2 π / ω (yr) A (cpd/kg/keV)

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