1 / 14

Alternative Supernova Energy Sources

Alternative Supernova Energy Sources. Jason Dexter (with Dan Kasen ) UC Berkeley & LBNL. Weird Supernovae. scp06f6. 2005ap. ptf09cnd. 2008es. 2006gy. 2007bi. Type Ia. core collapse supernovae. 2002bj. ptf10bhp. 2008ha. a fter Dan Kasen. Supernova Explosions. Diffusion:

afram
Download Presentation

Alternative Supernova Energy Sources

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Alternative Supernova Energy Sources Jason Dexter (with Dan Kasen) UC Berkeley & LBNL

  2. Weird Supernovae scp06f6 2005ap ptf09cnd 2008es 2006gy 2007bi Type Ia core collapse supernovae 2002bj ptf10bhp 2008ha after Dan Kasen Physics of Astronomical Transients

  3. Supernova Explosions • Diffusion: • Peak luminosity (Lp) from energy deposition at peak time (tp) Physics of Astronomical Transients

  4. Powering Supernova Light Curves Kasen & Woosley (2009) • Thermal • Radioactive (56Ni) Efficiency Branch & Tammann (1992) Physics of Astronomical Transients

  5. Interactions • Interaction of ejecta with material at large radius resets internal energy • Large if Rsh >> R0 Efficiency Woosley+07 Physics of Astronomical Transients

  6. MagnetarSpindown Power Physics of Astronomical Transients

  7. MagnetarSpindown Power Kasen & Bildsten (2010) Physics of Astronomical Transients

  8. Accretion Energy • Powers brightest sources in the Universe (AGN, GRBs) • Need: disk, Mfb, outflow Alexander Tchekhovskoy Physics of Astronomical Transients

  9. Accretion in core-collapse SNe Zhang et al. (2008) • Collapsars (“failed”) • Type I (long GRBs, Woosley 1993) • Type II/III (long gamma-ray transients, Quataert & Kasen 2012, Woosley 2012) • Fallback (successful) • Early: nucleosynthesis & neutrinos (Fryer et al.), type Ibc? (Lindner et al.) • Late: still significant energy? Physics of Astronomical Transients

  10. Semi-analytic Fallback Model • “Explosion” • Matzner & McKee (1999) shock velocity evolution • Free-fall: t6/n-3 for power law density profile • Asymptotic: t-5/3 • Reverse shock at H/He • Analogous to SNR Physics of Astronomical Transients

  11. Possible Outcomes • Stellar progenitors from Woosley et al. (2002) • Range of explosion energies Solar Ultra Zero Physics of Astronomical Transients

  12. Possible Outcomes Physics of Astronomical Transients

  13. Possible Outcomes Reverse Shocks “Collapsars” “Standard” No H and/or He Physics of Astronomical Transients

  14. Caveats • Pressure effects? • Angular momentum • Outflow turns on when J> Jc? • Outflow disrupts remaining material? • Collimation? Accretionturns off after disk forms? • Energy deposition in ejecta? • Similar to magnetar case Physics of Astronomical Transients

More Related