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Alignment in star–debris disc systems seen by Herschel

Greaves, J. S. and Ardila, D. R. (2014) Alignment in star–debris disc systems seen by Herschel. Monthly Notices of the Royal Astronomical Society, 438 (1). L31-L35. ISSN 0035-8711. doi:10.1093/mnrasl/slt153.

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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.

Item Type:Article
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URLURL TypeDescription Paper
Greaves, J. S.0000-0002-3133-413X
Additional Information:© 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society Accepted 2013 October 24. Received 2013 October 24; in original form 2013 August 4. First published online: November 25, 2013. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA. This work was supported by ERC grant 279973 (GMK, MCW) and Spanish grant AYA 2011-26202 (CE, JPM, JM).
Funding AgencyGrant Number
European Research Council (ERC)279973
Ministerio de Ciencia e Innovación (MCINN)AYA 2011-26202
Subject Keywords:circumstellar matter; planetary systems; infrared: stars
Issue or Number:1
Record Number:CaltechAUTHORS:20140228-100734343
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Official Citation:Greaves, J. S., Kennedy, G. M., Thureau, N., Eiroa, C., Marshall, J. P., Maldonado, J., . . . Wyatt, M. C. (2014). Alignment in star–debris disc systems seen by Herschel. Monthly Notices of the Royal Astronomical Society: Letters, 438(1), L31-L35. doi: 10.1093/mnrasl/slt153
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:44058
Deposited By: Jason Perez
Deposited On:28 Feb 2014 18:58
Last Modified:10 Nov 2021 16:47

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