OGLE-TR-113 b

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OGLE-TR-113 b is an exoplanet discovered in 2004 as part of the OGLE research project using the transit method , which orbits the main sequence star OGLE-TR-113 every 1.432 days . The major orbital half-axis is given as 0.0232 ± 0.0038 astronomical units (about 3.5 million km), with an unknown, but probably close to 0, orbital eccentricity . Its radius is given as 1.084 ± 0.029 Jupiter radii (about 78,000 kilometers). Based on its 1.32 ± 0.19 Jupiter masses (about 420 masses of earth ) estimated mass and the resulting average density of 1.26 ± 0.50 g / cm³ is concluded that it is a gas planetary type Hot Jupiter is . Its equilibrium temperature is given as 1355 ± 35 K (approx. 1100 ° C).

According to observations from the period 2007–2009, the orbital time has decreased by around 60 ± 15 milliseconds annually since its discovery. Should this value prove to be permanent, the planet would crash into its central star within two million years. However, it is also possible that another companion of the central star with an orbital period that clearly exceeds the previous observation period causes a periodic variation here.

Web links

Individual evidence

  1. ^ François Bouchy, F. Pont, NC Santos, C. Melo, M. Mayor, D. Queloz, S. Udry: Two new "very hot Jupiters" among the OGLE transiting candidates . In: Astronomy and Astrophysics . 421, 2004, pp. L13-L16. doi : 10.1051 / 0004-6361: 20040170 .
  2. ↑ a b Maciej Konacki, Guillermo Torres, Dimitar D. Sasselov, Grzegorz Pietrzynski, Andrzej Udalski, Saurabh Jha, Maria Teresa Ruiz, Gieren and others: The Transiting Extrasolar Giant Planet around the Star OGLE-TR-113 . In: The Astrophysical Journal Letters . 609, No. 1, 2004, pp. L37-L40. arxiv : astro-ph / 0404541 . bibcode : 2004ApJ ... 609L..37K . doi : 10.1086 / 422600 .
  3. ↑ a b c Rodrigo F. Díaz, Sebastián Ramírez, José Miguel Fernández, José Gallardo, Wolfgang Gieren, Valentin D. Ivanov, Pablo Mauas, Dante journal = The Astrophysical Journal Minniti and others: Millimagnitude Photometry for Transiting Extrasolar Planetary Candidates. II. Transits of OGLE-TR-113-b in the Optical and Near-IR . In: The Astrophysical Journal . 660, No. 1, 2007, pp. 850-857. arxiv : astro-ph / 0701345 . bibcode : 2007ApJ ... 660..850D . doi : 10.1086 / 512721 .
  4. ↑ a b c E. R. Adams, M. López-Morales, JL Elliot1,3, S. Seager, DJ Osip: Six High-Precision Transits of OGLE-TR-113b . In: The Astrophysical Journal . 721, 2010, pp. 1829-1834. doi : 10.1088 / 0004-637X / 721/2/1829 .
  5. ^ John Southworth: Homogeneous studies of transiting extrasolar planets - III. Additional planets and stellar models. In: Monthly Notes of the Royal Astronomical Society vol. 408 June 16, 2010, pp. 1689-1713 , accessed March 20, 2015 . , doi : 10.1111 / j.1365-2966.2010.17231.x
  6. ↑ Chris Kitchin: Exoplanets: Finding, Exploring, and Understanding Alien Worlds , pp. 198–199, New York 2012, ISBN 978-1-4614-0643-3 , doi : 10.1007 / 978-1-4614-0644-0