St Andrews Research Repository

St Andrews University Home
View Item 
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  • Login
JavaScript is disabled for your browser. Some features of this site may not work without it.

On the structure of the transition disk around TW Hydrae

Thumbnail
View/Open
Greaves_2014_A_A_OnTheStructure.pdf (1.208Mb)
Date
14/04/2014
Author
Menu, J.
Van Boekel, R.
Henning, T.
Chandler, C.J.
Linz, H.
Benisty, M.
Lacour, S.
Min, M.
Waelkens, C.
Andrews, S.M.
Calvet, N.
Carpenter, J.M.
Corder, S.A.
Deller, A.T.
Greaves, J.S.
Harris, R.J.
Isella, A.
Kwon, W.
Lazio, J.
Le Bouquin, J.-B.
Ménard, F.
Mundy, L.G.
Pérez, L.M.
Ricci, L.
Sargent, A.I.
Storm, S.
Testi, L.
Wilner, D.J.
Funder
Science & Technology Facilities Council
Grant ID
ST/J001651/1
Keywords
Protoplanetary disks
Techniques: interferometric
Stars: individual: TW Hya
QB Astronomy
Metadata
Show full item record
Altmetrics Handle Statistics
Altmetrics DOI Statistics
Abstract
Context. For over a decade, the structure of the inner cavity in the transition disk of TW Hydrae has been a subject of debate. Modeling the disk with data obtained at different wavelengths has led to a variety of proposed disk structures. Rather than being inconsistent, the individual models might point to the different faces of physical processes going on in disks, such as dust growth and planet formation. Aims. Our aim is to investigate the structure of the transition disk again and to find to what extent we can reconcile apparent model differences. Methods. A large set of high-angular-resolution data was collected from near-infrared to centimeter wavelengths. We investigated the existing disk models and established a new self-consistent radiative-transfer model. A genetic fitting algorithm was used to automatize the parameter fitting, and uncertainties were investigated in a Bayesian framework. Results. Simple disk models with a vertical inner rim and a radially homogeneous dust composition from small to large grains cannot reproduce the combined data set. Two modifications are applied to this simple disk model: (1) the inner rim is smoothed by exponentially decreasing the surface density in the inner ~3 AU, and (2) the largest grains (>100 μm) are concentrated towards the inner disk region. Both properties can be linked to fundamental processes that determine the evolution of protoplanetary disks: the shaping by a possible companion and the different regimes of dust-grain growth, respectively. Conclusions. The full interferometric data set from near-infrared to centimeter wavelengths requires a revision of existing models for the TW Hya disk. We present a new model that incorporates the characteristic structures of previous models but deviates in two key aspects: it does not have a sharp edge at 4 AU, and the surface density of large grains differs from that of smaller grains. This is the first successful radiative-transfer-based model for a full set of interferometric data.
Citation
Menu , J , Van Boekel , R , Henning , T , Chandler , C J , Linz , H , Benisty , M , Lacour , S , Min , M , Waelkens , C , Andrews , S M , Calvet , N , Carpenter , J M , Corder , S A , Deller , A T , Greaves , J S , Harris , R J , Isella , A , Kwon , W , Lazio , J , Le Bouquin , J-B , Ménard , F , Mundy , L G , Pérez , L M , Ricci , L , Sargent , A I , Storm , S , Testi , L & Wilner , D J 2014 , ' On the structure of the transition disk around TW Hydrae ' , Astronomy & Astrophysics , vol. 564 , A93 . https://doi.org/10.1051/0004-6361/201322961
Publication
Astronomy & Astrophysics
Status
Peer reviewed
DOI
https://doi.org/10.1051/0004-6361/201322961
ISSN
0004-6361
Type
Journal article
Rights
© ESO, 2014
Description
J. Menu acknowledges an FWO travel grant for a long research stay abroad (V448412N). F. Ménard acknowledges support from the Millennium Science Initiative (Chilean Ministry of Economy), through grant “Nucleus P10-022-F”. F. Ménard also acknowledges funding from the EU FP7-2011 under Grant Agreement No 284405.
Collections
  • University of St Andrews Research
URL
http://www.scopus.com/inward/record.url?eid=2-s2.0-84898432816&partnerID=8YFLogxK
URI
http://hdl.handle.net/10023/5273

Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

Advanced Search

Browse

All of RepositoryCommunities & CollectionsBy Issue DateNamesTitlesSubjectsClassificationTypeFunderThis CollectionBy Issue DateNamesTitlesSubjectsClassificationTypeFunder

My Account

Login

Open Access

To find out how you can benefit from open access to research, see our library web pages and Open Access blog. For open access help contact: openaccess@st-andrews.ac.uk.

Accessibility

Read our Accessibility statement.

How to submit research papers

The full text of research papers can be submitted to the repository via Pure, the University's research information system. For help see our guide: How to deposit in Pure.

Electronic thesis deposit

Help with deposit.

Repository help

For repository help contact: Digital-Repository@st-andrews.ac.uk.

Give Feedback

Cookie policy

This site may use cookies. Please see Terms and Conditions.

Usage statistics

COUNTER-compliant statistics on downloads from the repository are available from the IRUS-UK Service. Contact us for information.

© University of St Andrews Library

University of St Andrews is a charity registered in Scotland, No SC013532.

  • Facebook
  • Twitter