HD141569A: Disk Dissipation Caught in Action. Issue Volume 10:Issue S314(2015) (November 2015)

• Record Type: Journal Article
• Authors: Péricaud, J.; Di Folco, E.; Dutrey, A.; Augereau, J.-C.; Piétu, V.; Guilloteau, S.
• Editors: Kastner, J. H.; Stelzer, B.; Metchev, S. A.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 10:Issue S314(2015)
• Page Start: 201
• Page End: 202
• Publication Date: 2015-11
• Subjects: stars: circumstellar matter, -- protoplanetary disks, -- radio-lines: stars; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921315006432
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: 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 12 CO(2−1), 13 CO(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.