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Alignment in star-debris disc systems seen by Herschel

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Greaves_2014_MNRAS_Alignment.pdf (320.4Kb)
Date
11/02/2014
Author
Greaves, Jane Sophia
Kennedy, G. M.
Thureau, N.
Eiroa, C.
Marshall, J. P.
Maldonado, J.
Matthews, B. C.
Olofsson, G.
Barlow, M. J.
Moro-Martin, A.
Sibthorpe, B.
Absil, O.
Ardila, D. R.
Booth, M.
Broekhoven-Fiene, H.
Brown, David John Alexander
Collier Cameron, A.
del Burgo, C.
Di Francesco, J.
Duchene, G.
Eisloffel, J.
Ertel, S.
Holland, W. S.
Horner, J.
Kalas, P.
Kavelaars, J. J.
Lestrade, J. -F.
Vican, L.
Wilner, D. J.
Wolf, S.
Wyatt, M. C.
Keywords
Circumstellar matter
Planetary systems
Infrared: stars
QB Astronomy
Metadata
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Abstract
Many nearby main-sequence stars have been searched for debris using the far-infrared Herschel satellite, within the DEBRIS, DUNES and Guaranteed-Time Key Projects. We discuss here 11 stars of spectral types A–M where the stellar inclination is known and can be compared to that of the spatially resolved dust belts. The discs are found to be well aligned with the stellar equators, as in the case of the Sun's Kuiper belt, and unlike many close-in planets seen in transit surveys. The ensemble of stars here can be fitted with a star–disc tilt of ≲ 10°. These results suggest that proposed mechanisms for tilting the star or disc in fact operate rarely. A few systems also host imaged planets, whose orbits at tens of au are aligned with the debris discs, contrary to what might be expected in models where external perturbers induce tilts.
Citation
Greaves , J S , Kennedy , G M , Thureau , N , Eiroa , C , Marshall , J P , Maldonado , J , Matthews , B C , Olofsson , G , Barlow , M J , Moro-Martin , A , Sibthorpe , B , Absil , O , Ardila , D R , Booth , M , Broekhoven-Fiene , H , Brown , D J A , Collier Cameron , A , del Burgo , C , Di Francesco , J , Duchene , G , Eisloffel , J , Ertel , S , Holland , W S , Horner , J , Kalas , P , Kavelaars , J J , Lestrade , J -F , Vican , L , Wilner , D J , Wolf , S & Wyatt , M C 2014 , ' Alignment in star-debris disc systems seen by Herschel ' , Monthly Notices of the Royal Astronomical Society: Letters , vol. 438 , no. 1 , pp. L31-L35 . https://doi.org/10.1093/mnrasl/slt153
Publication
Monthly Notices of the Royal Astronomical Society: Letters
Status
Peer reviewed
DOI
https://doi.org/10.1093/mnrasl/slt153
ISSN
1745-3925
Type
Journal article
Rights
© 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society
Description
This work was supported by ERC grant 279973 (GMK, MCW) and Spanish grant AYA 2011-26202 (CE, JPM, JM).
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/5139

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