Updates 07/20

What do we have for the CEJet project

Runs:

source code
completed, Super Jet, stp_run_002, RGB+Jet, M2=1, mj = 2, end_frame = 173 astrobear_1008
completed, Normal Jet, stp_run_006, RGB+Jet, M2=1, mj = 2d-3, end_frame = 142 astrobear_1008
completed, Half-mass P2+Jet, stp_run_009, RGB+Jet, M2=1, mj = 2d-3, end_frame = 73 astrobear_1008
1. Rerun the super jet model, fix tracer, add tracer for ambient Redo stp_run_002, with fixed tracer
2. Rerun the no-jet fiducial, M2 = 1 Msun, use the CEjet module, this is like CE run 152 (or 143, but don't change softening radius), use the initial orbit conditions for the jet runs, add tracer for ambient Redo CE run 152
3. Half-solar mass companion, fiducial, no jet run No-jet counterpart for stp_run_009

Code:

  • I'm testing the tracer on ambient. otherwise the astrobear_1008 version is good to go for the remaining runs.
code version note
_1014_C particle buffer on both P1 and P2
_1212 use Shape to define refinement region
_1008 updated to fix tracer on jet, good for stp_run_006 & _009
_0112 refine on density criteria

Analysis:

  • Orbits, average separation plot. ——> working on the script
  • Mass, bind vs. unbind, find a best way to present this. ——→ working on script to read the totals data file
    • maybe something like Fig. 8 in the AGB paper, where more mass gets elevated but still not unbind
  • Energy, use data from the totals, do post-process if necessary
    • maybe analyze drag force as well, but orbit plot also shows the effect of drag force
  • Present figures similar to the AGB paper
    • Fig. 6, 7, 8
  • Update the separation plot
    • use CE run 152 for high mass fiducial, which doesn't change the softening radius

From thermal bomb meeting, 2020-7-16

Emily's new PN project:

  • Inject for a brief period but strong energy into the outflow
  • over free-fall / orbital time scale
  • how much energy does it take to destroy the torus?
  • calculate reasonable parameters for the CE binary used in my PN simulation (Emily)
  • launch the wind with new parameters in the current PN module for ~6 days (free-fall timescale) (Amy)

○ pressure support for the central region after shutting down the outflow?

GEE reading notes

Soker (2020) "Shaping PNe with jets and the GEE"

General properties of jets in shaping PNe

  1. Vjet ~ V_esc, MS V_esc ~ 600 km/s —> V_jet ~ (0.5~2) V_esc = 300 ~ 1200 km/s
  1. Jets deposit energy + momentum by heating/expelling ambient —> less mass to accrete

negative feedback cycle —> quench/re-start —> many ejection episodes

  1. "Pressure release valve" —> high accretion rates

positive feedback cycle

  1. might have a wide open angle —> theta~90 degrees

GEE: companion grazes the giant envelope (~photosphere)

  • BHL accretion of surrounding gas
  • RLOF from inner dense envelope

ILOT (intermediate-luminosity optical transients)

(​https://phsites.technion.ac.il/soker/ilot-club/)

t_photon_diffusion .le. t_gas_expansion —→ large amount of E_th —→ Radiation lost

GEE forming SNe IIb (?)

  • SNe IIb = core collapse, almost no H
  • jets remove H in the giant envelop during GEE
  • jets are on the MS companion, the giant will end in core collapse SN

Five phases of Jets' launching —- companion launches the jets

  1. Jets in wind accretion zone
    • Hillel+2020
    • P2 has jet before enter P1 envelope
    • BHL accretion from slow wind
    • Jets being dragged/bent behind, can't penetrate the accreting wind
  2. Jets from pre-CEE RLOF accretion
    • equatorial accretion flow, RLOF mass gain much greater than that from BHL
    • jets penetrate (likely) the wind, form bipolar lobes/point-symmetric
    • can also occur earlier in wind-RLOF
      • Harpaz+1992
      • Mohamed+Podsiadlowski 2007
  1. Jets during the GEE (too delicate??!)
    • Eta Carinae?
    • P2 accretes near periastron
    • BHL+RLOF
    • Shiber+2017
  1. Jets during the CEE
    • BHL from inside the envelope
      • Shiber+2019
      • jets don't break out the envelope
    • what is jets' role in helping mass removal?
  1. Jets during the post-CEE
    • P2 accretes from circumbinary disk
      • Soker2019, Kashi+Soker2011, Chen+Podsiodlowski2017
    • P2 launches jets w/ variable directions + intensities

Comments

No comments.