Inferring the size scales of planetary systems using resolved debris discs
Article
Article Title | Inferring the size scales of planetary systems using resolved debris discs |
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ERA Journal ID | 1073 |
Article Category | Article |
Authors | Marshall, J. P. (Author), Pawellek, N. (Author), Kennedy, G. M. (Author), Scicluna, P. (Author) and Krivov, A. V. (Author) |
Journal Title | Journal of the Italian Astronomical Society |
Journal Citation | 90 (4), pp. 543-548 |
Number of Pages | 6 |
Year | 2019 |
Place of Publication | Italy |
ISSN | 0037-8720 |
1824-016X | |
Web Address (URL) | http://sait.oat.ts.astro.it/MSAIt900419/index.html |
Abstract | Circumstellar debris discs are tenuous remnant rings of icy and rocky material left over from planet(esimal) formation processes around their host stars. Possible relationships between stellar luminosity and disc parameters have been examined. Based on analysis of a sample of 39 spatially resolved debris discs at infrared wavelengths by Herschel, a trend between stellar luminosities (L_star ) and the ratio of the discs' resolved radii (R_d) to blackbody radii (R_bb) was noted. We have examined a larger sample of resolved debris discs from archival far-infrared Herschel observations in order to determine the fidelity of that trend. We further examine whether the inferred extents of these discs are consistent with self-stirring models or may be indicative of dynamical perturbation by a planetary companion. Disc radii were determined by fitting the source brightness profiles with simple annular disc models convolved with a PSF. We obtain good agreement between the resolved extent of debris discs as measured at millimetre wavelengths and the estimates based on L_star and R_d/R_bb at far-infrared wavelengths, suggesting that the measured trend is a fair, albeit imperfect, predictor of actual disc extent. In future work we will apply this revised relationship to the larger sample of unresolved debris discs in an attempt to identify systems that exhibit evidence of stirring by a planetary companion. |
Keywords | Stars: circumstellar matter; stars: planetary systems |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
519999. Other physical sciences not elsewhere classified | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | Computational Engineering and Science Research Centre |
Max Planck Society, Germany | |
University of Warwick, United Kingdom | |
Academia Sinica, Taiwan | |
Friedrich Schiller University Jena, Germany |
https://research.usq.edu.au/item/q777y/inferring-the-size-scales-of-planetary-systems-using-resolved-debris-discs
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