GSC 03549-02811
GSC 03549-02811 (sometimes referred to as Kepler-1, or either TrES-2A or TrES-2 parent star in reference to its exoplanet TrES-2b)[7] is a binary star containing a yellow main-sequence star similar to the Sun. This star is located approximately 750 light-years away in the constellation of Draco. The apparent magnitude of this star is 11.41, which means it is not visible to the naked eye but can be seen with a medium-sized amateur telescope on a clear dark night. The age of this star is about 5 billion years.[4]
Planetary system
[edit ]In 2006 the exoplanet TrES-2b was discovered by the TrES program using the transit method. It is also within the field of view of the previously operational Kepler Mission planet-hunter spacecraft.[3] This system continues to be studied by other projects and the parameters are continuously improved.[6] The planet orbits the primary star.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 1.199(52) MJ | 0.03555(75) | 2.4706133738(187) | 0 (assumed) | 83.908(9)° | 1.189(25) RJ |
Though TrES-2b is currently the darkest known exoplanet, reflecting less than 1 percent of local sunlight, it shows a faint red glow. This is because its surface is 1,100 °C, it is so hot that it glows red. It is assumed to be tidally locked to its parent star.[9]
Binary star
[edit ]In 2008 a study was undertaken of fourteen stars with exoplanets that were originally discovered using the transit method through relatively small telescopes. These systems were re-examined with the 2.2M reflector telescope at the Calar Alto Observatory in Spain. This star system, along with two others, was determined to be a previously unknown binary star system. The previously unknown secondary star is a dim magnitude 15 K-type star separated by about 232 AU from the primary, appearing offset from the primary by about one arc second in the images. This discovery resulted in a significant recalculation of parameters for both the planet and the primary star.[2]
The Kepler mission
[edit ]
In March 2009 NASA launched the Kepler spacecraft. This spacecraft was a dedicated mission to discover extrasolar planets by the transit method from solar orbit. In April 2009 the project released the first light images from the spacecraft and TrES-2b was one of two objects highlighted in these images. Although TrES-2b is not the only known exoplanet in the field of view of this spacecraft it is the only one identified in the first-light images. This object is important for calibration and check-out.[10]
See also
[edit ]References
[edit ]- ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics . 649: A1. arXiv:2012.01533 . Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657 . S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c d e f g h i j k l Daemgen, S.; et al. (2009). "Binarity of transit host stars. Implications for planetary parameters". Astronomy and Astrophysics. 498 (2): 567–574. arXiv:0902.2179 . Bibcode:2009A&A...498..567D . doi:10.1051/0004-6361/200810988 . S2CID 9893376.
- ^ a b c O'Donovan, Francis T.; et al. (2006). "TrES-2: The First Transiting Planet in the Kepler Field". The Astrophysical Journal Letters. 651 (1): L61 – L64. arXiv:astro-ph/0609335 . Bibcode:2006ApJ...651L..61O . doi:10.1086/509123 .
- ^ a b c d "Kepler-1". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2009年04月22日.
- ^ a b c Skrutskie, Michael F.; et al. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S . doi:10.1086/498708 . Vizier catalog entry
- ^ a b c d e Alessandro Sozzetti; Torres, Guillermo; Charbonneau, David; Latham, David W.; Holman, Matthew J.; Winn, Joshua N.; Laird, John B.; o’Donovan, Francis T. (August 1, 2007). "Improving Stellar and Planetary Parameters of Transiting Planet Systems: The Case of TrES-2". The Astrophysical Journal. 664 (2): 1190–1198. arXiv:0704.2938 . Bibcode:2007ApJ...664.1190S. doi:10.1086/519214. S2CID 17078552.
- ^ D. Mislis; S. Schroter; J.H.M.M. Schmitt; O. Cordes; K. Reif (December 2009). "Multi-band transit observations of the TrES-2b exoplanet". arXiv:0912.4428v1 [astro-ph.EP].
- ^ Raetz, St.; et al. (2014). "Transit timing of TrES-2: A combined analysis of ground- and space-based photometry". Monthly Notices of the Royal Astronomical Society. 444 (2): 1351–1368. arXiv:1408.7022 . Bibcode:2014MNRAS.444.1351R . doi:10.1093/mnras/stu1505 .
- ^ "Coal-Black Alien Planet is Darkest Ever Seen". 11 August 2011.
- ^ "Kepler Eyes Cluster and Known Planet". NASA. 2009年04月16日. Retrieved 2009年05月09日.
External links
[edit ]- "Host to 'Hot Jupiter' (labeled)". multimedia/images. NASA. 2009年04月16日. Retrieved 2009年04月28日.
- "TrES-2". Exoplanets. Archived from the original on 2009年11月25日. Retrieved 2009年04月28日.
- KIC 11446443