onr:"swepub:oai:DiVA.org:su-161190"
Search: onr:"swepub:oai:DiVA.org:su-161190" > Resolving faint str...
- 1 of 1
- Previous record
- Next record
- To hitlist
Resolving faint structures in the debris disk around TWA 7 Tentative detections of an outer belt, a spiral arm, and a dusty cloud
- Olofsson, J. (author)
- van Holstein, R. G. (author)
- Boccaletti, A. (author)
- show more...
- Thebault, P. (author)
- Gratton, R. (author)
- Lazzoni, C. (author)
- Kral, Q. (author)
- Bayo, A. (author)
- Canovas, H. (author)
- Caceres, C. (author)
- Ginski, C. (author)
- Pinte, C. (author)
- Chauvin, G. (author)
- Desidera, S. (author)
- Henning, Th (author)
- Langlois, M. (author)
- Milli, J. (author)
- Schlieder, J. E. (author)
- Schreiber, M. R. (author)
- Augereau, J-C (author)
- Bonnefoy, M. (author)
- Buenzli, E. (author)
- Brandner, W. (author)
- Engler, N. (author)
- Feldt, M. (author)
- Godoy, N. (author)
- Grady, C. (author)
- Hagelberg, J. (author)
- Lagrange, A-M (author)
- Lannier, J. (author)
- Ligi, R. (author)
- Maire, A-L (author)
- Mawet, D. (author)
- Menard, F. (author)
- Mesa, D. (author)
- Mouillet, D. (author)
- Peretti, S. (author)
- Perrot, C. (author)
- Salter, G. (author)
- Schmidt, T. (author)
- Sissa, E. (author)
- Thalmann, C. (author)
- Vigan, A. (author)
- Abe, L. (author)
- Feautrier, P. (author)
- Le Mignant, D. (author)
- Moulin, T. (author)
- Pavlov, A. (author)
- Rabou, P. (author)
- Rousset, G. (author)
- Roux, A. (author)
- show less...
- (creator_code:org_t)
- 2018-09-26
- 2018
- English.
- In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 617
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- Context. Debris disks are the intrinsic by-products of the star and planet formation processes. Most likely due to instrumental limitations and their natural faintness, little is known about debris disks around low mass stars, especially when it comes to spatially resolved observations. Aims. We present new VLT/SPHERE IRDIS dual-polarization imaging (DPI) observations in which we detect the dust ring around the M2 spectral type star TWA 7. Combined with additional angular differential imaging observations we aim at a fine characterization of the debris disk and setting constraints on the presence of low-mass planets. Methods. We modeled the SPHERE DPI observations and constrain the location of the small dust grains, as well as the spectral energy distribution of the debris disk, using the results inferred from the observations, and performed simple N-body simulations. Results. We find that the dust density distribution peaks at similar to 0.72 '' (25 au), with a very shallow outer power-law slope, and that the disk has an inclination of similar to 13 degrees with a position angle of similar to 91 degrees east of north. We also report low signal-to-noise ratio detections of an outer belt at a distance of similar to 1.5 '' (similar to 52 au) from the star, of a spiral arm in the southern side of the star, and of a possible dusty clump at 0.11 ''. These findings seem to persist over timescales of at least a year. Using the intensity images, we do not detect any planets in the close vicinity of the star, but the sensitivity reaches Jovian planet mass upper limits. We find that the SED is best reproduced with an inner disk at similar to 0.2 '' (similar to 7 au) and another belt at 0.72 '' (25 au). Conclusions. We report the detections of several unexpected features in the disk around TWA 7. A yet undetected 100 M-circle plus planet with a semi-major axis at 20-30 au could possibly explain the outer belt as well as the spiral arm. We conclude that stellar winds are unlikely to be responsible for the spiral arm.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- circumstellar matter
- instrumentation: high angular resolution
- instrumentation: polarimeters
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
- Astronomy and Astrophysics (Search for host publication in LIBRIS)
To the university's database
- 1 of 1
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Olofsson, J.
- van Holstein, R. ...
- Boccaletti, A.
- Janson, Markus
- Thebault, P.
- Gratton, R.
- show more...
- Lazzoni, C.
- Kral, Q.
- Bayo, A.
- Canovas, H.
- Caceres, C.
- Ginski, C.
- Pinte, C.
- Asensio-Torres, ...
- Chauvin, G.
- Desidera, S.
- Henning, Th
- Langlois, M.
- Milli, J.
- Schlieder, J. E.
- Schreiber, M. R.
- Augereau, J-C
- Bonnefoy, M.
- Buenzli, E.
- Brandner, W.
- Durkan, Stephen
- Engler, N.
- Feldt, M.
- Godoy, N.
- Grady, C.
- Hagelberg, J.
- Lagrange, A-M
- Lannier, J.
- Ligi, R.
- Maire, A-L
- Mawet, D.
- Menard, F.
- Mesa, D.
- Mouillet, D.
- Peretti, S.
- Perrot, C.
- Salter, G.
- Schmidt, T.
- Sissa, E.
- Thalmann, C.
- Vigan, A.
- Abe, L.
- Feautrier, P.
- Le Mignant, D.
- Moulin, T.
- Pavlov, A.
- Rabou, P.
- Rousset, G.
- Roux, A.
- show less...
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
- and Astronomy Astrop ...
- Articles in the publication
- Astronomy and As ...
- By the university
- Stockholm University
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
