Correlation of GRB and CMB peaks ( view from the CMB frame )
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Correlation of GRB and CMB peaks (view from the CMB frame) Oleg Verkhodanov, Vladimir Sokolov, Margarita Khabibullina Special astrophysical observatory Nizhnij Arkhyz, Russia
description
Oleg Verkhodanov, Vladimir Sokolov, Margarita Khabibullina Special astrophysical observatory Nizhnij Arkhyz, Russia. Correlation of GRB and CMB peaks ( view from the CMB frame ). GRBs: BeppoSAX (red) + BATSE (white). BATSE. BeppoSAX. t
Transcript of Correlation of GRB and CMB peaks ( view from the CMB frame )
Correlation of GRB and CMB peaks (view from the CMB frame)
Oleg Verkhodanov, Vladimir Sokolov, Margarita Khabibullina
Special astrophysical observatory
Nizhnij Arkhyz, Russia
GRBs: BeppoSAX (red) + BATSE (white)
BeppoSAX BATSE
t<2s
t >2s
t<2s
t >2s
WMAP5 ILC CMB map
Multipole expansion
L = 2 (quadrupole) L =3 (octupole)
L = 4 L = 5
ILC map: different resolution
Lmax=20, w=260'x260' Lmax=150, w=36'x36'
ILC map: Lmax=150
t < 2s
t > 2s
t < 2s
t > 2s
BeppoSAX BATSE
ILC map: Lmax=20
t < 2s
t > 2s
t < 2s
t > 2s
BeppoSAX BATSE
What could we await from correlation ?
What could we await from correlation ?
1) GRBs as cosmological star formation regions
a) Sunyaev-Zeldovich effect (< ~4')
b) Sachs-Wolfe effect (>200')
2) Something else
3) Nothing
What could we await from correlation ?
1) GRBs as cosmological star formation regions
a) Sunyaev-Zeldovich effect (< ~4')
b) Sachs-Wolfe effect (>200')
2) Something else
3) Nothing
Let us look at statistics
First way:
measuring pixel values of CMB in the GRB pixels
First way:
measuring pixel values of CMB in the GRB pixels
T Mission Lmax Nt Ne Model
t<2s BATSE 150 497 244 249+/-11
t>2s BATSE 150 1540 763 769+/-19
t<2s BATSE 20 497 250 248+/-13
t>2s BATSE 20 1540 781 768+/-32
t<2s BeppoSAX 150 87 43 44+/- 5
t>2s BeppoSAX 150 694 339 347+/-15
t<2s BeppoSAX 20 87 50 44+/- 5 ?
t>2s BeppoSAX 20 694 346 348+/-18
Look at pictures...
ILC map statistics: Lmax=20
t < 2s
t > 2s
t < 2s
t > 2s
BeppoSAX BATSE
ILC map statistics: Lmax=150
t < 2s
t > 2s
t < 2s
t > 2s
BeppoSAX BATSE
Where are these pixels from ?
Put pixels on a sphere...
Put pixels on a sphere...
Put pixels on a sphere...
Put pixels on a sphere and
add ecliptic coordinate system...
Put pixels on a sphere and
and intergrate them in 700'x700' pix
Pixel integration
Smoothed
Map of CMB pixels in GRB positions
Quadrupole
Ecliptic C.S.
Quadrupole of CMB pixels in GRB positions
Ecliptic C.S.
Equatorial C.S.
Quadrupole of CMB pixels in GRB positions
OR
(both ?)
So, what do we see ?
Small extra-pixel statistics knows about ecliptic
or/and equatorial coordinate system...
Second way:
correlation of CMB and GRB maps
GRBs maps, pixel w=200'x200'
t < 2s
t > 2s
t < 2s
t > 2s
BeppoSAX BATSE
BATSE correlation 500' with
t < 2s
t > 2s
t < 2s
t > 2s
BeppoSAX CMB
BATSE correlation with
t < 2s
t > 2s
t < 2s
t > 2s
BeppoSAX CMB
smoothed
BATSE correlation with
Spectrum, max at L=3
t > 2s
Spectrum, max at L=2
t > 2s
BeppoSAX CMB
BATSE correlation with
L=3
t > 2s
L=2
t > 2s
BeppoSAX CMB
BATSE correlation with
L=3
t > 2s
L=2
t > 2s
BeppoSAX CMB
Equatorial coord. system
What do we see ?
There are some non-gaussian features in the GRB-CMB
correlations in:
1) Ecliptic coordinate system – solar wind in Ecl.Poles ?
2) Equatorial Coor. S. - cosmic rays around Earth?
3) Small strange statistics ?
Not only GRBs know coordinate systems,
but CMB knows equatorial system too !... ?
Interesting information can be obtained from GRBs redshifts.
