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PULSAR TIMING ARRAYS
STEFAN OSŁOWSKI
STARS
PULSAR TIMING ARRAYS SKY FULL OF STARS STARS SKY FULL OF STARS - - PowerPoint PPT Presentation
PULSAR TIMING ARRAYS SKY FULL OF STARS STARS SKY FULL OF STARS - - PowerPoint PPT Presentation
STEFAN OS OWSKI PULSAR TIMING ARRAYS SKY FULL OF STARS STARS SKY FULL OF STARS STARS Gravity versus pressure STELLAR REMNANTS A S A N : t d i e C r DEGENERATE PRESSURE Bosons Fermions 810 nK 510 nK 240 nK Credit:
SLIDE 2 SKY FULL OF STARS
SLIDE 3 SKY FULL OF STARS
STARS
Gravity
versus
pressure
SLIDE 4 STELLAR REMNANTS
C r e d i t : N A S A
SLIDE 5 DEGENERATE PRESSURE
Bosons 810 nK 510 nK 240 nK
Credit: Andrew Truscott Randall Hulet
Fermions
SLIDE 6 NEUTRON STARS
SUPERNOVA ====>> NEUTRON STAR
Pspin≈27 days R ≈ 7*108m Pspin≈0.5 ms R ≈ 104m B ≈ 1G B ≈ 1012G
SLIDE 7 P-P DOT DIAGRAM
PULSAR POPULATION
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Binary stars
SLIDE 9 MSPS
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T h e
s
- u
n d s
- f
p u l s a r s
Vela
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T h e
s
- u
n d s
- f
p u l s a r s
J0437-4715
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a pulsar
i s
a
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Pulsar timing
slide from D. Champion
TOA Residual Fold Fold TOA Residual SLIDE 16 Time model
- Components of 7me transforma7on:
C r e d i t : K u
- L
i u
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SLIDE 22 e
- e
- e
- e
- e
- e
- e
- e
- e
- e-
- e
- e
- e
- e
- e
- e
- e
- e
- e
Pulsar timing
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C r e d i t : N A S A
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Millenium Simulation
C r e d i t : V I R G O c
- n
s
- r
t i u m
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C r e d i t : M a y e r e t a l . 2 7 C r e d i t : N A S A / E S A
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C r e d i t : K a s p i e t a l . 1 9 9 4
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Pulsar timing
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C r e d i t : G a l i c k
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C r e d i t : E s t a b r
- k
& W a h l q u i s t 1 9 7 5
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C r e d i t : S a z h i n 1 9 7 8
Clearly the detection of gravitational waves […] still lies well outside the realm of possible.
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C r e d i t : S a z h i n 1 9 7 8
[…] we would need a time standard whose relative precision is ~10-15
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C r e d i t : S a z h i n 1 9 7 8
One of the most appealing prospects in the search for ultralong gravitational waves would be to monitor the radiation of pulsars.
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C r e d i t : D e t w e i l e r 1 9 7 9
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C r e d i t : H e l l i n g s & D
- w
n s 1 9 8 3
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C r e d i t : F
- s
t e r & B a c k e r 1 9 9
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C r e d i t : J e n e t e t a l . 2 5
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in GR only two polarisations
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C r e d i t : H e l l i n g s & D
- w
n s 1 9 8 3
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C r e d i t : C
- r
n i s h
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C r e d i t : L e e e t a l . 2 8
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C r e d i t : L e e e t a l . 2 1
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C r e d i t : Y a r d l e y e t a l . 2 1 1
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C r e d i t :
Siemens et al 2013
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C r e d i t : R
- s
a d
- e
t a l . 2 1 6
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C r e d i t : M i n g a r e l l i e t a l . 2 1 3
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C r e d i t : S e s a n a
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C r e d i t : K
- c
s i s & S e s a n a 2 1 4
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C r e d i t : J e n e t e t a l . 2 4
3C66B cannot exist!
expected measured
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https://nanograv.github.io/11yr_stochastic_analysis/
NANOgrav 11 year dataset
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https://nanograv.github.io/11yr_stochastic_analysis/
NANOgrav 11 year dataset
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C r e d i t : W a n g e t a l . 2 1 5
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C r e d i t : W a n g e t a l . 2 1 5
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https://nanograv.github.io/11yr_stochastic_analysis/
NANOgrav 11 year dataset
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C r e d i t : S a n i d a s e t a l . 2 1 2
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