A Layered Debris Disk around M Star TWA 7 in Scattered Light
Bin Ren, \'Elodie Choquet, Marshall D. Perrin, Dimitri P. Mawet,, Christine H. Chen, Julien Milli, John H. Debes, Isabel Rebollido, Christopher, C. Stark, J. B. Hagan, Dean C. Hines, Maxwell A. Millar-Blanchaer, Laurent, Pueyo, Aki Roberge, Glenn H. Schneider, Eugene Serabyn

TL;DR
This study presents detailed multi-instrument observations of the layered debris disk around M star TWA 7, revealing a complex architecture with rings, a spiral, and a clump, and discusses implications for dust properties and potential planet detection.
Contribution
First detailed multi-wavelength scattered light imaging of TWA 7's debris disk, revealing its layered structure and dynamic features, advancing understanding of M star debris disks.
Findings
Discovery of a tertiary ring and a clump in the disk.
Identification of a spiral structure with possible Keplerian motion.
Evidence of small dust particles based on polarization and color analysis.
Abstract
We have obtained Hubble Space Telescope (HST) coronagraphic observations of the circumstellar disk around M star TWA 7 using the STIS instrument in visible light. Together with archival observations including HST/NICMOS using the F160W filter and Very Large Telescope/SPHERE at -band in polarized light, we investigate the system in scattered light. By studying this nearly face-on system using geometric disk models and Henyey--Greenstein phase functions, we report new discovery of a tertiary ring and a clump. We identify a layered architecture: three rings, a spiral, and an au elliptical clump. The most extended ring peaks at au, and the other components are on its outskirts. Our point source detection limit calculations demonstrate the necessity of disk modeling in imaging fainter planets. Morphologically, we witness a clockwise spiral motion, and the motion…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
