A Caltech Library Service

A Precise Estimate of the Radius of HD 149026b

Nutzman, Philip and Charbonneau, David and Winn, Joshua N. and Knutson, Heather A. and Fortney, Jonathan J. and Holman, Matthew J. and Agol, Eric (2008) A Precise Estimate of the Radius of HD 149026b. In: Transiting Planets. IAU Symposium Proceedings Series. Vol.4. No.253. Cambridge University Press , Cambridge, pp. 466-469. ISBN 9780521889841.

[img] PDF - Published Version
See Usage Policy.

[img] PDF - Accepted Version
See Usage Policy.


Use this Persistent URL to link to this item:


We present Spitzer 8 μm transit observations of the extrasolar planet system HD 149026b. At this wavelength, transit light curves are weakly affected by stellar limb-darkening, allowing for a simpler and more accurate determination of planetary parameters. We measure a planet-star radius ratio of R_p/R∗=0.05158±0.00077, and in combination with ground-based data and independent constraints on the stellar mass and radius, we derive an orbital inclination of i = 85°.4^(+0°.9)_(−0°.8) and a planet radius of 0.755 ± 0.040 R_J. These measurements further support models in which the planet is greatly enriched in heavy elements.

Item Type:Book Section
Related URLs:
URLURL TypeDescription Paper
Charbonneau, David0000-0002-9003-484X
Winn, Joshua N.0000-0002-4265-047X
Knutson, Heather A.0000-0002-0822-3095
Fortney, Jonathan J.0000-0002-9843-4354
Holman, Matthew J.0000-0002-1139-4880
Agol, Eric0000-0002-0802-9145
Additional Information:© 2009 International Astronomical Union.
Series Name:IAU Symposium Proceedings Series
Issue or Number:253
Record Number:CaltechAUTHORS:20190521-112359091
Persistent URL:
Official Citation:Nutzman, P., Charbonneau, D., Winn, J., Knutson, H., Fortney, J., Holman, M., & Agol, E. (2008). A Precise Estimate of the Radius of HD 149026b. Proceedings of the International Astronomical Union, 4(S253), 466-469. doi:10.1017/S1743921308026951
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95643
Deposited By: Tony Diaz
Deposited On:21 May 2019 18:33
Last Modified:09 Mar 2020 13:18

Repository Staff Only: item control page