Poster Open Access
Thanathibodee, Thanawuth;
Calvet, Nuria;
Molina, Brandon;
Bae, Jaehan;
Serna, Javier;
Reynolds, Mark;
Muzerolle, James;
Hernández, Jesús;
Franco Hernández, Ramiro
Theoretical studies and simulations suggest that giant planets can create gaps in circumstellar disks around young, pre-main-sequence stars. As a result, the mass accretion rate from the disk onto the star decreases significantly. Here, we evaluate that prediction and its implications by measuring the mass accretion rates onto the star PDS 70 and its proto-planets. We applied magnetospheric models to fit the multi-epoch H-alpha profiles of PDS 70 and the H-alpha fluxes of PDS 70 b/c. We found that the star's mass accretion rate varies with its rotation period, with an average of 1.3x10-10 Msun/yr. The total mass accretion rate onto the planets is only 10% of that of the star. Given the size of the gap in the disk around PDS 70, these estimates of the mass accretion rate are consistent with: (1) the disk has a high viscosity, or (2) the disk has an inner mass reservoir and a low viscosity. More observations of systems with young, accreting planets are needed to discern between these scenarios.
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Zhu, Z. et al. 2011, ApJ, 729, 47 DOI:10.1088/0004-637X/729/1/47
Bae, J. et al. 2017, ApJ, 850, 201 DOI:10.3847/1538-4357/aa9705
Keppler, M. et al. 2018, A&A, 617, A44 DOI:10.1051/0004-6361/201832957
Haffert, S. et al. 2019, NatAs, 3, 749 DOI:10.1038/s41550-019-0780-5
Hartmann, L. et al. 1994, ApJ, 246, 669 DOI:10.1086/174104
Muzerolle, J. et al. 1998, ApJ, 492, 743 DOI:10.1086/305069
Muzerolle, J. et al. 2001, ApJ, 550, 944 DOI:10.1086/319779
Hartmann, L. et al. 2016, ARA&A, 54, 135 DOI:10.1146/annurev-astro-081915-023347
Batygin, K. 2018, AJ, 155, 178 DOI:10.3847/1538-3881/aab54e
Rigliaco, E. et al. 2012, A7A, 548, A56 DOI:10.1051/0004-6361/201219832
Ingleby, L. et al. 2013, ApJ, 767, 112 DOI:10.1088/0004-637X/767/2/112
Natta, A. et al. 2004, A&A, 424, 603 DOI:10.1051/0004-6361:20040356
Manara, C. F. et al. 2019, A&A, 631, L2 DOI:10.1051/0004-6361/201936488
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