11/02/2006NS/LSC meeting, MIT1/11 Searches for Young Pulsars Tania Regimbau OCA/Nice.

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Presentation transcript:

11/02/2006NS/LSC meeting, MIT1/11 Searches for Young Pulsars Tania Regimbau OCA/Nice

11/02/2006NS/LSC meeting, MIT2/11 Gravitational Wave polarization amplitudes from a triaxial rotating NS: Triaxial Emission The ideal pulsar is fast, close, with large equatorial deformation!  milliseconds are fast but have small ellipticities (  < )  magnetars have large ellipticities but are slowed down very quickly  young normal pulsars

11/02/2006NS/LSC meeting, MIT3/11 Population Synthesis Recover the statistical properties of the total population hidden from radio observation by selection effects.  initial period: gaussian distribution with mean ~ ms and dispertion  ~ ms (Regimbau & de Freitas Pacheco, A&A, 2000, 359, 242 and confirmed by Faucher-Giguere & Kaspi, 2006, 643, 332)  pulsars with P<80 ms (Regimbau & de Freitas Pacheco, A&A, 401, 385, 2002)

11/02/2006NS/LSC meeting, MIT4/11 Detectable pulsars: frequency (Regimbau & de Freitas Pacheco, A&A, 447, 1, 2006)

11/02/2006NS/LSC meeting, MIT5/11 Detectable pulsars: frequency (Regimbau & de Freitas Pacheco, A&A, 447, 1, 2006)

11/02/2006NS/LSC meeting, MIT6/11 Population Synthesis Recover the statistical properties of the total population hidden from radio observation by selection effects.  initial magnetic field: log-gaussian distribution with mean ~13 G and dispertion  ~0.8 G (Regimbau & de Freitas Pacheco, A&A, 2000, 359, 242 and confirmed by Faucher-Giguere & Kaspi, 2006, 643, 332)  ~10% with B >10 14 G (magnetars) incompressible fluid (Ferraro, 1954): superconductiong interior of type I (Bonazzola & Gourgoulhon 1996):

11/02/2006NS/LSC meeting, MIT7/11 Magnetars (Regimbau & de Freitas Pacheco, A&A, 447, 1, 2006)

11/02/2006NS/LSC meeting, MIT8/11 milliseconds magnetars young fast pulsars

11/02/2006NS/LSC meeting, MIT9/11 Collaboration with Nancay  Millisecond pulsars (SKA) : detection of the GW stochastic background at ~nHz  Binary systems (Virgo/LIGO)  Young and glitching pulsars (Virgo/LIGO) (timing for continuous signal searches, coincidence for oscillation modes)

11/02/2006NS/LSC meeting, MIT10/11 Observed Pulsars PSRfgw (Hz)dP/dt D(kpc)association glitches obs. time (hrs/month) B * ** * 10 B * ** * 5 J E * 14 1 B E-13 2 SNR:Crab 11 4 J E SNR:W28(?) 6 2 J E SNR:G (?) 3 2 J E-14 1* 3 2 J E * 3 2 B E * 2 4 J E * 2 2 J E * 2 1 J E * 2 2 J E * 2 2

11/02/2006NS/LSC meeting, MIT11/11 Merci!

11/02/2006NS/LSC meeting, MIT12/11 Observed Pulsars PSRPeriod (s)dP/dt D(kpc)association glitches obs. time (hrs/month) B * ** * 10 B * ** * 5 J E * 14 1 J E-13 2 SNR:Crab 11 4 J E SNR:W28(?) 6 2 J E SNR:G (?) 3 2 J E-14 1* 3 2 J E * 3 2 J E * 2 4 J E * 2 2 J E * 2 1 J E * 2 2 J E * 2 2

11/02/2006NS/LSC meeting, MIT13/11 Starquakes Link, Franco, Epstein, astro/ph/ )