HAT-p-28b and HAT-p-29b: Two sub-Jupiter mass transiting planets

L. A. Buchhave, G. Bakos, J. D. Hartman, G. Torres, D. W. Latham, J. Andersen, G. Kovács, R. W. Noyes, A. Shporer, G. A. Esquerdo, D. A. Fischer, J. A. Johnson, G. W. Marcy, A. W. Howard, B. Béky, D. D. Sasselov, G. Frész, S. N. Quinn, R. P. Stefanik, T. SzklenrP. Berlind, M. L. Calkins, J. Lázár, I. Papp, P. Sri

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Abstract

We present the discovery of two transiting exoplanets. HAT-P-28b orbits a V = 13.03 G3 dwarf star with a period P = 3.2572days and has a mass of 0.63 0.04MJ and a radius of 1.21+0.11-0.08R J yielding a mean density of 0.44 0.09g cm-3. HAT-P-29b orbits a V = 11.90 F8 dwarf star with a period P = 5.7232days and has a mass of 0.78+0.08- 0.04MJ and a radius of 1.11 +0.14- 0.08RJ yielding a mean density of 0.71 ± 0.18g cm-3. We discuss the properties of these planets in the context of other known transiting planets.

Original languageEnglish (US)
Article number116
JournalAstrophysical Journal
Volume733
Issue number2
DOIs
StatePublished - Jun 1 2011

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • planetary systems
  • stars: individual (HAT-P-28, GSC 2284-00503, HAT-P-29, GSC 3293-01539)
  • techniques: photometric
  • techniques: spectroscopic

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