HD141569A: Disk Dissipation Caught in Action

J. Pericaud (1) , E. Di Folco (1) , Anne Dutrey (1) , J.-C., Augereau , V., Piétu , S. Guilloteau (1)

1 AMOR 2016

Debris disks are usually thought to be gas-poor, the gas being dissipated by accretion or evaporation during the protoplanetary phase. HD141569A is a 5 Myr old star harboring a famous debris disk, with multiple rings and spiral features. I present here the first PdBI maps of the 12CO(2-1), 13CO(2-1) gas and dust emission at 1.3 mm in this disk. The analysis reveals there is still a large amount of (primordial) gas extending out to 250 AU, i.e. inside the rings observed in scattered light. HD141569A is thus a hybrid disk with a huge debris component, where dust has evolved and is produced by collisions, with a large remnant reservoir of gas.

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]

J. Pericaud, E. Di Folco, Anne Dutrey, J.-C., Augereau, V., Piétu, et al.. HD141569A: Disk Dissipation Caught in Action. Young Stars & Planets Near the Sun, Proceedings of the International Astronomical Union, IAU Symposium, Volume 314, pp. 201-202- held 11 - 15 May 2015 / U.S.A, Atlanta, GA (Cambridge University Press), J.H. Kastner, B. Stelzer, S.A. Metchev, eds, May 2015, Atlanta, United States. pp.201 - 202, ⟨10.1017/S1743921315006432⟩. ⟨hal-01225760⟩