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High energy & Gravitational wave detectors: New windows on the universe Eli Waxman Weizmann Institute, ISRAEL
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Non electro-magnetic “messengers” MeV detectors: Solar & SN1987A ’ s Stellar physics (Sun ’ s core, SNe core collapse) physics High energy n & GW detectors New, non-EM windows Penetrate deep into the source Travel unhindered across the universe This talk The Astrophysics case for HEN detectors Relation to GW detectors Fundamental physics
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High energy ’ s: A new window >0.1 TeV detectors: Extend horizon to extra-Galactic scale MeV detectors limited to local (~Galactic) sources [10kt @ 1MeV 1Gton @ TeV, TeV / MeV ~10 6 ] Study “ Cosmic accelerators ” [p , pp ’s ’s] physics
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HEN detector motivation: Cosmic accelerators Cosmic-ray E [GeV] log [dJ/dE] 1 10 6 10 E -2.7 E -3 Heavy Nuclei Protons Light Nuclei? Galactic X-Galactic (?) [Blandford & Eichler, Phys. Rep. 87; Axford, ApJS 94; Nagano & Watson, Rev. Mod. Phys. 00] Source: Supernovae(?) Source? Lighter
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The 10 20 eV challenge R B v v 2R t RF =R/ c) l =R/ 22 22 [Waxman 95, 04, Norman et al. 95]
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What do we know about >10 19 eV CRs? X-Galactic - R L = /eB=40 p,20 kpc >> h disk =0.1kpc (kpc=3 light yr) - L>10 12 ( 2 / ) L sun Composition
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Composition clues HiRes 2005
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What do we know about >10 19 eV CRs? X-Galactic - R L = /eB=30 p,20 kpc >> hdisk=0.1kpc (kpc=3 light yr) - L>10 12 ( 2 / ) L sun Composition- light nuclei? Spectrum
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[Waxman 1995; Bahcall & Waxman 03] [Katz & Waxman 09] E 2 (dN/dE)=E 2 (dQ/dE) t eff. (t eff. : p + CMB N + Assume: p, dQ/dE~(1+z) m E - >10 19.3 eV: consistent with protons, E 2 (dQ/dE) ~10 43.7 erg/Mpc 3 yr + GZK E 2 (dQ/dE) ~Const.: Consistent with shock acceleration [Krimsky 77; Bednarz & Ostrowski 98; Keshet & Waxman 05 cf. Lemoine & Revenu 06] Flux & Spectrum ct eff [Mpc] GZK (CMB) suppression log(E 2 dQ/dE) [erg/Mpc 2 yr]
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What do we know about >10 19 eV CRs? X-Galactic - R L = /eB=30 p,20 kpc >> hdisk=0.1kpc (kpc=3 light yr) - L>10 12 ( 2 / ) L sun Composition- light nuclei? Spectrum >10 19.3 eV: consistent with protons, E 2 (dQ/dE) ~10 43.7 erg/Mpc 3 yr + GZK Sources: - L>10 12 ( 2 / ) L sun - E 2 (dQ/dE) ~10 43.7 erg/Mpc 3 yr - d(10 20 eV)<d GZK ~100Mpc !! No L>10 12 L sun at d<d GZK Transient Sources
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Anisotropy clues Galaxy density integrated to 75Mpc CR intensity map ( source ~ gal ) [Waxman, Fisher & Piran 1997] Biased ( source ~ gal for gal > gal ) [Kashti & Waxman 08] Cross-correlation signal in the > 10 19.7 eV Auger data: Anisotropy @ 98% CL; Consistent with LSS (Few fold increase >99% CL, but not 99.9% CL) Correlation (~1.5 ) suggests astrophysical ( “ bottom up ” ) accelerators
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Suspects - L>10 12 ( 2 / ) L sun - E 2 (dQ/dE) ~10 43.7 erg/Mpc 3 yr Gamma-ray Bursts (GRBs) ~ 10 2.5, L ~ 10 19 L Sun L/ 2 >10 12 L sun (dn/dVdt)*E~10 -9.5 /Mpc 3 yr *10 53.5 erg ~10 44 erg/Mpc 3 yr Transient: T ~10s, T p / T ~10 11 Active Galactic Nuclei (AGN, Steady): ~ 10 1 L>10 14 L Sun = few brightest !! Non at d<d GZK Invoke: “ Dark ” (proton only) AGN L~ 10 14 L Sun, t~1month flares from stellar disruptions [Blandford 76; Lovelace 76] [Waxman 95, Vietri 95, Milgrom & Usov 95] [Waxman 95] [Boldt & Loewenstein 00] [Farrar & Gruzinov 08]
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Virgo cluster: 50 million light yrs M87 Extra-galactic Jets: some pic ’ s
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Multi-wavelength observations X-ray Radio
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Chandra, Cen A
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GRB: 10 19 L Sun, M BH ~1M sun, M~1M sun /s, ~10 2.5 AGN: 10 14 L Sun, M BH ~10 9 M sun, M~1M sun /yr, ~10 1 MQ: 10 5 L Sun, M BH ~1M sun, M~10 -8 M sun /yr, ~10 0.5 Source physics challenges Particle acceleration
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Collapse of a massive star (>20M sun ) Long bursts (10s)? The GRB “ engine ” Progenitor: Compact Binary Merger (NS-NS, NS-BH) Short (0.1s) bursts? [Woosley 93; Paczynski 98] [Goodman 86; Paczynski 86 Narayan, Paczynski & Piran 02] E ~10 51.5 erg (E ,apparent ~10 53.5 erg) + t~1ms Grav. Collapse of few M sun to BH (E~Mc 2, t~GM/c 3 ) T~0.1-10s >> t~1ms Accretion disk 100MeV photons >100
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Long GRBs and SNe 4 long GRBs associated with SN Ib/c (core collapse of massive He, C/O progenitors) - 3 have E ,apparent ~10 48 erg~10 -5 x10 53 erg, 1 intermediate - 2 SN-less long GRBs “SN Ib/c origin of long GRBs definitively established” Some (<10 -2 ) SN Ib/c produce (low L?) GRBs - What determines whether to GRB or not to GRB? (“failed” vs. “successful” jets?) - Do all core-collapse SN produce jets? - Do jets play a major role in ejecting the envelopes in all core-collapse SNe? (envelope ejection- major open Q) [Woosley & Bloom 06]
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Massive BHs @ Galactic centers Existence inferred from - AGN activity - Stellar motions - Disk Water Masers M BH ~10 6.5 M sun M BH ~10 7.5 M sun R obs ~10 4 R S Really BHs? [Genzel et al.][Miyoshi et al. 95] [Salpeter 64; Zel’dovich & Novikov 64]
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MBH “ progenitor ” Q ’ s MBH “ seeds ” - ~100M sun from 1 st generation massive stars - ~10 4 M sun from direct collapse What is the outcome of galaxy mergers? (BH merger by gas/stellar drag?) The role of accretion vs. mergers? [e.g. Madau & Rees 01] [e.g. Rees 78]
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GRB: 10 19 L Sun, M BH ~1M sun, M~1M sun /s, ~10 2.5 AGN: 10 14 L Sun, M BH ~10 9 M sun, M~1M sun /yr, ~10 1 MQ: 10 5 L Sun, M BH ~1M sun, M~10 -8 M sun /yr, ~10 0.5 Source physics challenges Energy extraction Jet acceleration Jet content (kinetic/Poynting) Particle acceleration Radiation mechanisms
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HE Astronomy p + N + 0 2 ; + e + + e + + Identify UHECR sources Study BH accretion/acceleration physics E 2 dQ/dE=10 44 erg/Mpc 3 yr & p <1: ~1 Giga-ton (~1 km 3 ) detector required If X-G p ’ s: Identify primaries, determine f(z) [Waxman & Bahcall 99] [Berezinsky & Zatsepin 69 ]
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HE experiments Optical Cerenkov - South Pole Amanda: 677 OM, 0.05 km 3 IceCube: +~800/yr OM (05/06 … ) 4800 OM=1 km 3 s - Mediterranean Antares: 12 lines (5/08), 900 OM, ~0.1 km 3 Nestor: (?) 0.1 km 3 km3Net: R&D 1 km 3 UHE: Radio Air shower Aura, Ariana (in Ice) Auger ( ) ANITA (Balloon) EUSO (?) LOFAR
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GRB ’ s “ Generic ” baryonic jet ’ s Background free (Successful/failed) Jet penetration of massive stellar envelope Enhanced TeV emission [Waxman & Bahcall 97, 99; Rachen & Meszaros 98; Alvarez-Muniz & F. Halzen 99; Guetta et al. 04; Hooper, Alvarez-Muniz, Halzen & E. Reuveni 04] [Meszaros & Waxman 01; Razzaque, Meszaros & Waxman 03, 04; Guetta & Granot 03; Dermer & Atoyan 03; Horiuchi & Ando 08]
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The current limit [Achterberg et al. 07 (The IceCube collaboration)]
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Jets driving core collapse SNe? Mildly relativistic, ~3, E~10 51.5 erg jet driving a core-collapse SN N (>100GeV)~1 (D/20Mpc) -2 /km 2 SN rate within 20Mpc ~10/yr [Razzaque, Meszaros & Waxman 04; Ando & Beacom 05; Horiuchi & Ando 08]
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AGN models BBR05 Individual sources unlikely to be identified
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- physics & astro-physics decay e : : = 1:2:0 (Osc.) e : : = 1:1:1 appearance experiment GRBs: - timing (10s over Hubble distance) LI to 1:10 16 ; WEP to 1:10 6 EM energy loss of ’ s (and ’ s) e : : = 1:1:1 (E>E 0 ) 1:2:2 GRBs: E 0 ~10 15 eV [Rachen & Meszaros 98; Kashti & Waxman 05] [Waxman & Bahcall 97; Amelino-Camelia,et al.98; Coleman &.Glashow 99; Jacob & Piran 07] [Waxman & Bahcall 97]
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GW Astronomy NS-NS(BH) merger Rapid mass motion (changing quadrapole moment) GW: g = +h , u~( ch) 2 /G P~G 2 (mv 2 ) 2 /c 5 h~(v/c) 2 R s /D ~ R s 2 /d*D (R s =2GM/c 2 ) Detection: R s (1M sun )=3*10 5 cm=3km D*h~10 5 cm Lisa science paper
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Km-scale detectors LIGO (x3), Virgo (GEO600, TAMA) NS-NS(BH): D*h~10 5 cm D~30Mpc GRB rate ~1/100yr x10 improvement required (Advanced LIGO) Core-collapse SNe (~10/yr out to 20Mpc)? If driven by Proto-NS oscillations (+ coupling of l=1 & l=2 modes) v/c~0.1, ~0.1M, h*D~10 2.5 cm LIGO detector noise [Ott et al. 06]
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MBHs @ Galactic centers 10 10 galaxies in Hubble volume Each undergone a merger in Hubble time 1 [x log(M max /M min )] MBH merger/yr Open Q ’ s reminder: Seed mass, Merger/accretion R s (10 6.5 M sun )=10 12 cm=10 7 km [Volonteri 06]
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LISA: ~10 12 cm space detector MBH In-spiral, merger & relaxation Confirm: GR MBH Study: MBH formation history MBH properties Stellar dynamics near MBH MBH-10M sun BH merger Test GR MBH Lisa science paper
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GR & Cosmology tests Detect GW (directly) Confirm GR BHs BH-BH mergers: “ clean ”, signal (should be) precisely calculable Precision tests of strong field GR Absolute D L (z): h~R s /D L, ~(1+z) -1 c/R s Requires: Optical z; Challenge: >1 o Constrain geometry, Dark energy EOS..
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Outlook HEN & GW detectors: New non-EM windows (unknown unknowns?) Open Q ’ s (known unknowns) - Composition, origin & acceleration of CRs - GRB progenitors - Core collapse supernovae mechanism - Formation, evolution & properties of MBHs - Accretion, energy extraction & jet formation by BHs - The environment of MBHs - D L (z) - Oscillations appearance) - Timing LI to 1:10 16 ; WEP to 1:10 6 - Confirm: GW, GR BH - Test strong field GR [DM annihilation detection, relic GW background] EM identification crucial - Reduce backgrounds - Astro and fundamental physics implications
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AMANDA & IceCube
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The Mediterranean effort ANTARES (NESTOR, NEMO) KM3NeT
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Back up slides
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