Stephen C.-Y. Ng HKU. Outline What are pulsar wind nebulae? Physical properties and evolution Why...
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- Slide 1
- Stephen C.-Y. Ng HKU
- Slide 2
- Outline What are pulsar wind nebulae? Physical properties and
evolution Why study PWNe? Common TeV sources, particle accelerators
Multiwavelength observations of PWNe Broadband SED Surprise from
Fermi: Crab flaring FAN 4, Jul 9 2013Stephen Ng
- Slide 3
- Pulsar Winds Where does pulsar rotational energy go? >10 35
erg/s < 10% in radiation (mostly -rays) > 90% in pulsar winds
FAN 4, Jul 9 2013Stephen Ng Credit: D. Page
- Slide 4
- Pulsar Wind FAN 4, Jul 9 2013Stephen Ng Credit:
CXC/D.Berry
- Slide 5
- Termination Shock FAN 4, Jul 9 2013Stephen Ng Termination shock
c c/3 Free -streaming pulsar wind Ejecta/ISM Credit: P. Slane
Shocked pulsar wind Pulsar wind nebulae: broadband synchrotron
bubbles (see reviews by Gaensler & Slane 2006; Cheng 2009)
Gaensler & Slane (2006)
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- Pulsar Wind Nebula Stephen NgFAN 4, Jul 9 2013
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- NASA/CXC/ESA/2MASS/NRAO Broadband Emission FAN 4, Jul 9
2013Stephen Ng
- Slide 8
- Crab Nebula FAN 4, Jul 9 2013 Abdo et al. (2010) Synchrotron IC
Fermi LAT
- Slide 9
- Why study PWNe? Relativistic shock physics Cosmic ray
acceleration Important TeV sources FAN 4, Jul 9 2013Stephen Ng
Sironi & Spitkovsky (2011)
- Slide 10
- Why study PWNe? Relativistic shock physics Cosmic ray
acceleration Important TeV sources FAN 4, Jul 9 2013Stephen Ng
Aguilar et al. (2013) e + excess: dark matter decay? Or
pulsars/PWNe?
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- Why study PWNe Relativistic shock physics Cosmic ray
acceleration Important TeV sources FAN 4, Jul 9 2013Stephen Ng 35
TeV PWNe: largest group, ~1/4 identified TeV sources
- Slide 12
- PWN Evolution FAN 4, Jul 9 2013Stephen Ng van der Swaluw et al.
(2003)
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- Free Expansion FAN 4, Jul 9 2013Stephen Ng van der Swaluw et
al. (2003)
- Slide 14
- Axisymmetric Structure FAN 4, Jul 9 2013Stephen Ng
CXC/D.BerryLyubarsky (2002)
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- Torus+Jet Kes 75 Gotthelf+00; Ng+ 08 Lu+02; Temim+10 G54.1+0.3
Slane+02; 04 3C 58 Weisskopf+00; Hester+02 Crab Pavlov+01;
Helfand+01 Vela
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- Torus Modelling CrabVelaB1706-44 J2221+6114 J1930+1852 /
G54.1+0.3 B0540-69J0205+6449 / 3C58 J0537-6910 / N157B B1800-21
J2021+3651 J1833+1034 / G21.5-0.9 J1124-5916 / G292.0+1.8 Stephen
Ng Ng & Romani (2004; 2008) FAN 4, Jul 9 2013
- Slide 17
- Hand of God: FAN 4, Jul 9 2013Stephen Ng Aharonian et al.
(2005) HESS TeV MSH 1552 / PSR B150958 NASA/CXC/SAO/Slane et al.
Chandra
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- Hand of God: FAN 4, Jul 9 2013Stephen Ng MSH 1552 / PSR B150958
NASA/CXC/SAO/Slane et al. Chandra Radio Ng et al. (2013,in
prep.)
- Slide 19
- Free Expansion FAN 4, Jul 9 2013Stephen Ng van der Swaluw et
al. (2003)
- Slide 20
- Reverse-Shock Interaction FAN 4, Jul 9 2013Stephen Ng van der
Swaluw et al. (2003)
- Slide 21
- NASA/PSU/Pavlov Vela X Stephen Ng Aharonian et al. (2006) TeV
Abdo et al. (2010) Fermi Mattana et al. (2011) NASA/SAO/CXC
X-rays
- Slide 22
- G327.11.1 FAN 4, Jul 9 2013Stephen Ng Acero et al. (2012) TeV
Temim et al. (2009) Radio + X-ray Ng et al. (2013, in prep.) Radio
preliminary No Fermi Detection
- Slide 23
- Bow Shock FAN 4, Jul 9 2013Stephen Ng van der Swaluw et al.
(2003)
- Slide 24
- Bow Shocks Supersonic motion in the ISM bow shocks Stephen Ng
CXC/Weiss ISM ram pressure Pulsar wind pressure FAN 4, Jul 9
2013
- Slide 25
- The Frying Pan G315.90.0 / PSR J14375959 ~ 2000 km/s Longest
pulsar tail > 20pc FAN 4, Jul 9 2013Stephen Ng Ng et al. (2012
)
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- PSR J15095850 / G319.90.7 Ng et al. (2010) FAN 4, Jul 9
2013Stephen Ng Kargaltsev et al. (2008); Ng et al. (2010) X-ray +
Radio Radio
- Slide 27
- Multiwavelength Studies FAN 4, Jul 9 2013Stephen Ng Crab PWN
Abdo et al. (2010) Synchrotron IC
- Slide 28
- Multiwavelength Studies FAN 4, Jul 9 2013Stephen Ng Abdo et al.
(2010) MSH 15 52 / PSR B1509 58
- Slide 29
- 1D Modelling FAN 4, Jul 9 2013Stephen Ng Gelfand et al.
(2009)
- Slide 30
- Time Variability FAN 4, Jul 9 2013Stephen Ng
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- Crab Nebula: A Standard Candle? Cospar 7/16/2012Stephen Ng
Wilson-Hodge et al. (2011)
- Slide 32
- Time Variability FAN 4, Jul 9 2013Stephen Ng
NASA/ASU/Hester
- Slide 33
- Crab PWN FAN 4, Jul 9 2013 NASA/ASU/Hester Stephen Ng
- Slide 34
- Vela Jet FAN 4, Jul 9 2013Stephen Ng NASA/CXC/PSU/Pavlov et
al.
- Slide 35
- Vela Jet FAN 4, Jul 9 2013Stephen Ng Durant et al. (2013)
- Slide 36
- Ng et al. (2008); Livingstone, Ng et al. (2011) PSR J1846 0258
/ Kes 75 FAN 4, Jul 9 2013 200020062009 Stephen Ng
- Slide 37
- Crab -ray Flares FAN 4, Jul 9 2013Stephen Ng
- Slide 38
- Crab Flares FAN 4, Jul 9 2013Stephen Ng Striani et al.
(2013)
- Slide 39
- 2013 Mar Flare FAN 4, Jul 9 2013Stephen Ng Striani et al.
(2013); Tavani et al. (2013)
- Slide 40
- Flare Spectrum FAN 4, Jul 9 2013Stephen Ng Striani et al.
(2013)
- Slide 41
- Flare Spectrum FAN 4, Jul 9 2013Stephen Ng Weisskopf et al.
(2013)
- Slide 42
- Summary What are pulsar wind nebulae? Physical properties and
evolution Why study PWNe? Common TeV sources, particle accelerators
Multiwavelength observations of PWNe Broadband SED Surprise from
Fermi: Crab flaring FAN 4, Jul 9 2013Stephen Ng