PULSAR TIMING ARRAYS SKY FULL OF STARS STARS SKY FULL OF STARS - PowerPoint PPT Presentation

STEFAN OS Ł 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: Andrew Truscott Randall Hulet

NEUTRON STARS SUPERNOVA ====>> NEUTRON STAR P spin ≈ 27 days B ≈ 1G R ≈ 7 * 10 8 m P spin ≈ 0.5 ms R ≈ 10 4 m B ≈ 10 12 G

P-P DOT DIAGRAM PULSAR POPULATION

TEXT Binary stars

MSPS

s r a s l u p s d f n o u o s e h T Vela

s r a s l u p s d f n o u o s e h T J0437-4715

a pulsar s i a

Pulsar timing slide from D. Champion Fold Fold TOA TOA Residual Residual

Time model • Components of 7me transforma7on: [ Edwards et al. 2006 ] u i L o u K t : i d e r C

e - e - Pulsar timing e - e - e - e - e - e - e - e e e e e e e e e e - e - e e - - e e - - e - e e - - e e e - - - e - e e - - e - e - e -

A S A N : t d i e C r

C r e d i t : V I R G O c o n s o r t i u m Millenium Simulation

C r e d i t : N A S A / E S A C r e d i t : M a y e r e t a l . 2 0 0 7

C r e d i t : K a s p i e t a l . 1 9 9 4

Pulsar timing

k c i l a G t : i d e r C

C r e d i t : E s t a b r o o k & W a h l q u i s t 1 9 7 5

Clearly the detection of gravitational waves […] still lies well outside the realm of possible. 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 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. C r e d i t : S a z h i n 1 9 7 8

C r e d i t : D e t w e i l e r 1 9 7 9

3 8 9 1 s n w o D & s g n i l l e H : t d i e r C

C r e d i t : F o s t e r & B a c k e r 1 9 9 0

C r e d i t : J e n e t e t a l . 2 0 0 5

in GR only two polarisations

3 8 9 1 s n w o D & s g n i l l e H : t d i e r C

h s i n r o C t : i d e r C

8 0 0 2 . a l t e e e L t : i d e r C

0 1 0 2 . a l t e e e L t : i d e r C

1 1 0 2 . a l t e y e l d r a Y t : i d e r C

C r e d i t : Siemens et al 2013

6 1 0 2 . a l t e o d a s o R t : i d e r C

3 1 0 2 l . a t e l i e l r a g n i M : t d i e C r

a n a s e S t : i d e r C

: t d i e C r a n a s e S & s i s c o K 4 1 0 2

expected measured C r e d i t : J e n e 3C66B cannot exist! t e t a l . 2 0 0 4

https://nanograv.github.io/11yr_stochastic_analysis/ NANOgrav 11 year dataset

https://nanograv.github.io/11yr_stochastic_analysis/ NANOgrav 11 year dataset

5 1 0 2 l . a t e g n a W : t d i e C r

5 1 0 2 l . a t e g n a W : t d i e C r

https://nanograv.github.io/11yr_stochastic_analysis/ NANOgrav 11 year dataset

2 1 0 2 l . a t e s a d i n a S : t d i e C r

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