Skip to main content Accessibility help
×
Home
Hostname: page-component-6c8bd87754-5d2lc Total loading time: 0.273 Render date: 2022-01-19T06:09:36.437Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "metricsAbstractViews": false, "figures": true, "newCiteModal": false, "newCitedByModal": true, "newEcommerce": true, "newUsageEvents": true }

Detection and Characterization of Transiting Systems with Smaller Exoplanets

Published online by Cambridge University Press:  29 April 2014

Teruyuki Hirano
Affiliation:
Department of Physics, The University of Tokyo, Tokyo 113-0033, Japan email: hirano@utap.phys.s.u-tokyo.ac.jp
Norio Narita
Affiliation:
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan
Akihiko Fukui
Affiliation:
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan
Roberto Sanchis-Ojeda
Affiliation:
Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Joshua N. Winn
Affiliation:
Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Yasushi Suto
Affiliation:
Department of Physics, The University of Tokyo, Tokyo 113-0033, Japan email: hirano@utap.phys.s.u-tokyo.ac.jp
Atsushi Taruya
Affiliation:
Department of Physics, The University of Tokyo, Tokyo 113-0033, Japan email: hirano@utap.phys.s.u-tokyo.ac.jp
Rights & Permissions[Opens in a new window]

Abstract

HTML view is not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We present our effort to detect and characterize transiting systems with small exoplanets. First we present our on-going project to detect transiting exoplanets around late-type stars. As many authors point out, late-type stars can host potentially habitable rocky planets, whose transits are detectable with 2-meter class telescopes. We aim at detecting (small-sized) transiting exoplanets around M-type stars and are conducting a survey using the Okayama 1.88m telescope. We introduce our campaign at Okayama. Next we discuss the characterization of small-sized exoplanets. We focus on the measurement of the spin-orbit angle, the angle between the stellar spin axis and planetary orbital axis. The spin-orbit relations are of great importance in discussing planetary formations, evolutions, and migrations. To this point, the Rossiter-McLaughlin (RM) effect, an apparent radial velocity anomaly during a planetary transit, has been mainly investigated to measure the projected spin-orbit angles. However, as the size of the transiting planet becomes smaller, the detection of the RM effect becomes challenging because of the small RM signal. We have newly developed a technique to investigate spin-orbit relations for smaller planets by combining Kepler's ultra-precise photometry and spectroscopic measurements. We show that, contrary to planetary systems with close-in giant planets, most of the systems with small-sized planets (including Earth-sized ones) have smaller spin-orbit angles, which implies a different evolutional history of the planetary systems. We also discuss future prospects on the detection and characterization of smaller transiting exoplanets.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2014 

References

Borucki, W. J., et al. 2010, Science, 327, 977CrossRefGoogle Scholar
Bouchy, F., et al. 2008, A&A, 482, L25Google Scholar
Hirano, T., Sanchis-Ojeda, R., Takeda, Y., Narita, N., Winn, J. N., Taruya, A., & Suto, Y. 2012, ApJ, 756, 66CrossRefGoogle Scholar
Lin, D. N. C., Bodenheimer, P., & Richardson, D. C. 1996, Nature, 380, 606CrossRefGoogle Scholar
Nagasawa, M., Ida, S., & Bessho, T. 2008, ApJ, 678, 498CrossRefGoogle Scholar
Ohta, Y., Taruya, A., & Suto, Y. 2005, ApJ, 622, 1118CrossRefGoogle Scholar
Pollacco, D. L., et al. 2006, PASP, 118, 1407CrossRefGoogle Scholar
Queloz, D., Eggenberger, A., Mayor, M., Perrier, C., Beuzit, J. L., Naef, D., Sivan, J. P., & Udry, S. 2000, A&A, 359, L13Google Scholar
Rasio, F. A. & Ford, E. B. 1996, Science, 274, 954CrossRefGoogle Scholar
Takeda, Y., Ohkubo, M., & Sadakane, K. 2002, PASJ, 54, 451CrossRefGoogle Scholar
Winn, J. N., et al. 2005, ApJ, 631, 1215CrossRefGoogle Scholar
Yi, S., Demarque, P., Kim, Y.-C., Lee, Y.-W., Ree, C. H., Lejeune, T., & Barnes, S. 2001, ApJS, 136, 417CrossRefGoogle Scholar
You have Access

Send article to Kindle

To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Detection and Characterization of Transiting Systems with Smaller Exoplanets
Available formats
×

Send article to Dropbox

To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

Detection and Characterization of Transiting Systems with Smaller Exoplanets
Available formats
×

Send article to Google Drive

To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

Detection and Characterization of Transiting Systems with Smaller Exoplanets
Available formats
×
×

Reply to: Submit a response

Please enter your response.

Your details

Please enter a valid email address.

Conflicting interests

Do you have any conflicting interests? *