SED analysis and Hydro binary simulation diagnosis

L2pup is the a binary system that is located only 64 parsec away from earth. It has an AGB star and secondary that maybe a RG. Assume a 3000 K AGB star (blackbody) with 1140 solar luminosity (SL), we can calculate its radius to be 126 solar radius (SR) by standard procedures. The Spectrum Energy Distribution (SED) at 64 parsec away is shown in the picture below. It peaks at 1 um with intensity.

Red line is result from Radmc3d with the same condition of pure blackbody radiation in vacuum. Blue line is SED of blackbody radiation. Simulation is "Redder".

Compare to the results from other simulations by eye, the difference in magnitude is not very significant. Thus much of the light reaches earth.

Where can I get the data in Kervella's 2015 paper?

I find the accreting secondary has accreted too much gas material. In other papers talking about L2pup, they usually guestimate the mass of the dust is on order of 1E-7 solar mass with 1% dust gas ratio. In my simulation, the total mass of ejected gas is 1E-5 solar mass but the secondary accreted 50% of the gas as time goes on and another about 40% escape so the total mass in the disk is only about 1E-6 solar mass which make the simulation not realistic.

Attachments (3)

Download all attachments as: .zip

Comments

No comments.