Inferring the size scales of planetary systems using resolved debris discs

Article

Marshall, J. P., Pawellek, N., Kennedy, G. M., Scicluna, P. and Krivov, A. V.. 2019. "Inferring the size scales of planetary systems using resolved debris discs." Journal of the Italian Astronomical Society. 90 (4), pp. 543-548.
Article Title

Inferring the size scales of planetary systems using resolved debris discs

ERA Journal ID1073
Article CategoryArticle
AuthorsMarshall, J. P. (Author), Pawellek, N. (Author), Kennedy, G. M. (Author), Scicluna, P. (Author) and Krivov, A. V. (Author)
Journal TitleJournal of the Italian Astronomical Society
Journal Citation90 (4), pp. 543-548
Number of Pages6
Year2019
Place of PublicationItaly
ISSN0037-8720
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.

KeywordsStars: circumstellar matter; stars: planetary systems
Contains Sensitive ContentDoes not contain sensitive content
ANZSRC Field of Research 2020510109. Stellar astronomy and planetary systems
519999. Other physical sciences not elsewhere classified
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Institution of OriginUniversity of Southern Queensland
Byline AffiliationsComputational Engineering and Science Research Centre
Max Planck Society, Germany
University of Warwick, United Kingdom
Academia Sinica, Taiwan
Friedrich Schiller University Jena, Germany
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Mustill, Alexander J., Marshall, Jonathan P., Villaver, Eva, Veras, Dimitri, Davis, Philip J., Horner, Jonathan and Wittenmyer, Robert A.. 2013. "Main-sequence progenitor configurations of the NN ser candidate circumbinary planetary system are dynamically unstable." Monthly Notices of the Royal Astronomical Society. 436 (3), pp. 2515-2521. https://doi.org/10.1093/mnras/stt1754
A dynamical analysis of the proposed circumbinary HWVirginis planetary system
Horner, J., Hinse, T. C., Wittenmyer, R. A., Marshall, J. P. and Tinney, C. G.. 2012. "A dynamical analysis of the proposed circumbinary HWVirginis planetary system." Monthly Notices of the Royal Astronomical Society. 427 (4), pp. 2812-2823. https://doi.org/10.1111/j.1365-2966.2012.22046.x
A detailed dynamical investigation of the proposed QS Virginis planetary system
Horner, J., Wittenmyer, R. A., Hinse, T. C., Marshall, J. P., Mustill, A. J. and Tinney, C. G.. 2013. "A detailed dynamical investigation of the proposed QS Virginis planetary system." Monthly Notices of the Royal Astronomical Society. 435 (3), pp. 2033-2039. https://doi.org/10.1093/mnras/stt1420
Evolution from protoplanetary to debris discs: the transition disc around HD 166191
Kennedy, G. M., Murphy, S. J., Lisse, C. M., Menard, F., Sitko, M. L., Wyatt, M. C., Bayliss, D. D. R., DeMeo, F. E., Crawford, K. B., Kim, D. L., Rudy, R. J., Russell, R. W., Sibthorpe, B., Skinner, M. A. and Zhou, G.. 2014. "Evolution from protoplanetary to debris discs: the transition disc around HD 166191." Monthly Notices of the Royal Astronomical Society. 438 (4), pp. 3299-3309. https://doi.org/10.1093/mnras/stt2435