Predicting Photometric and Spectroscopic Signatures of Rings around Transiting Extrasolar Planets
| dc.creator | Ohta, Yasuhiro | |
| dc.creator | Taruya, Atsushi | |
| dc.creator | Suto, Yasushi | |
| dc.date | 2006-11-15 | |
| dc.date | 2008-08-25 | |
| dc.date.accessioned | 2026-07-07T12:16:28Z | |
| dc.date.available | 2026-07-07T12:16:28Z | |
| dc.description | We present theoretical predictions for photometric and spectroscopic signatures of rings around transiting extrasolar planets. On the basis of a general formulation for the transiting signature in the stellar light curve and the velocity anomaly due to the Rossiter effect, we compute the expected signals analytically for a face-on ring system, and numerically for more general configurations. We study the detectability of a ring around a transiting planet located at a=3AU for a variety of obliquity and azimuthal angles, and find that it is possible to detect the ring signature both photometrically and spectroscopically unless the ring is almost edge-on (i.e., the obliquity angle of the ring θis much less than unity). We also consider the detectability of planetary rings around a close-in planet, HD 209458b ($θ\approx 90^\circ-i_{\rm orbit} \approx 3^\circ.32$), and Saturn ($θ\approx 26^\circ.7$) as illustrative examples. While the former is difficult to detect with the current precision (photometric precision of 10^-4 and radial velocity precision of 1 m/s), a marginal detection of the latter is possible photometrically. If the future precision of the radial velocity measurement reaches even below 0.1 m/s, they will be even detectable from the ground-based spectroscopic observations. | |
| dc.description | 29 pages, 20 figures, accepted to ApJ | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0611466 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0611466 | |
| dc.identifier | Astrophys.J.690:1-12,2009 | |
| dc.identifier | doi:10.1088/0004-637X/690/1/1 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/211815 | |
| dc.subject | Astrophysics | |
| dc.title | Predicting Photometric and Spectroscopic Signatures of Rings around Transiting Extrasolar Planets | |
| dc.type | text |