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26 April 2024 |
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A novel method for identifying exoplanetary rings | | Jorge I. Zuluaga
; David Kipping
; Mario Sucerquia
; Jaime A. Alvarado
; | | Date: |
27 Feb 2015 | | Abstract: | The discovery of rings around extrasolar planets ("exorings") is one of the
next breakthroughs in exoplanetary research. Previous studies have explored the
feasibility of detecting exorings with present and future photometric
sensitivities by seeking anomalous deviations in the residuals of a standard
transit light curve fit, at the level of ~100 ppm for Kronian rings. In this
work, we explore two much larger observational consequences of exorings: (1)
the significant increase in transit depth that may lead to misclassification of
ringed planetary candidates as false-positives and/or the underestimation of
planetary density; and (2) the so-called "photo-ring" effect, a new
asterodensity profiling effect, revealed by a comparison of the light curve
derived stellar density to that measured with independent methods (e.g.
asteroseismology). Whilst these methods do not provide an unambiguous discovery
of exorings, we show that the large amplitude of these effects combined with
their relatively simple analytic description, makes them highly suited to large
scale surveys to identify candidate ringed planets worthy of more detailed
investigation. Moreover, these methods lend themselves to ensemble analyses
seeking to uncover evidence for a population of ringed planets. We describe the
method in detail, develop the basic underlying formalism and test it in the
parameter space of rings and transit configuration. We discuss the prospects of
using the method for the first systematic search of exoplanetary rings in the
Kepler database and provide basic computational code for implementing it. | | Source: | arXiv, 1502.7818 | | Services: | Forum | Review | PDF | Favorites | |
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