CaltechAUTHORS
Published May 2008 | Version Published + Accepted Version
Book Section - Chapter Open

A Precise Estimate of the Radius of HD 149026b

Creators

  • 1. ROR icon Harvard-Smithsonian Center for Astrophysics
  • 2. ROR icon Massachusetts Institute of Technology
  • 3. ROR icon University of California, Santa Cruz
  • 4. ROR icon University of Washington

Contributors

Abstract

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.

Additional Information

© 2009 International Astronomical Union.

Attached Files

Published - precise_estimate_of_the_radius_of_hd_149026b.pdf

Accepted Version - 0807.1318.pdf

Files

0807.1318.pdf

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Additional details

Identifiers

Eprint ID
95643
Resolver ID
CaltechAUTHORS:20190521-112359091

Related works

Describes
https://arxiv.org/abs/0807.1318 (URL)

Dates

Created
2019-05-21
Created from EPrint's datestamp field
Updated
2021-11-16
Created from EPrint's last_modified field

Caltech Custom Metadata

Caltech groups
Division of Geological and Planetary Sciences (GPS)
Series Name
IAU Symposium Proceedings Series
Series Volume or Issue Number
253