Recent transits of the super-Earth exoplanet GJ 1214b

Pedro V. Sada, Drake Deming, Brian Jackson, Donald E. Jennings, Steven W. Peterson, Flynn Haase, Kevin Bays, Eamon O'Gorman, Alan Lundsford

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

We report recent ground-based photometry of the transiting super-Earth exoplanet GJ 1214b at several wavelengths, including the infrared near 1.25 μm (J band).We observed a J-band transit with the FLAMINGOS infrared imager and the 2.1 m telescope on Kitt Peak, and we observed several optical transits using a 0.5 m telescope on Kitt Peak and the 0.36 m Universidad de Monterrey Observatory telescope. Our high-precision J-band observations exploit the brightness of the M dwarf host star at this infrared wavelength as compared with the optical and are significantly less affected by stellar activity and limb darkening. We fit the J-band transit to obtain an independent determination of the planetary and stellar radii. Our radius for the planet (2.61 -011 +0.30. R⊕) is in excellent agreement with the discovery value reported by Charbonneau et al. based on optical data. We demonstrate that the planetary radius is insensitive to degeneracies in the fitting process. We use all of our observations to improve the transit ephemeris, finding P = 1.5804043 ± 0.0000005 days and T 0 = 2454964.94390 ± 0.00006 BJD.

Original languageEnglish
Pages (from-to)L215-L218
JournalAstrophysical Journal Letters
Volume720
Issue number2 PART 2
DOIs
Publication statusPublished - 10 Sep 2010

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'Recent transits of the super-Earth exoplanet GJ 1214b'. Together they form a unique fingerprint.

  • Cite this

    Sada, P. V., Deming, D., Jackson, B., Jennings, D. E., Peterson, S. W., Haase, F., Bays, K., O'Gorman, E., & Lundsford, A. (2010). Recent transits of the super-Earth exoplanet GJ 1214b. Astrophysical Journal Letters, 720(2 PART 2), L215-L218. https://doi.org/10.1088/2041-8205/720/2/L215