XO-1
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Corona Borealis [1] |
| Right ascension | 16h 02m 11.840s [2] |
| Declination | +28° 10′ 10.43″ [2] |
| Apparent magnitude (V) | 11.19 ± 0.03 [3] |
| Characteristics | |
| Spectral type | G1V [3] |
| Apparent magnitude (B) | 11.85 ± 0.04 [3] |
| Apparent magnitude (V) | 11.19 ± 0.03 [3] |
| Apparent magnitude (J) | 9.939 ± 0.022 [4] |
| Apparent magnitude (H) | 9.601 ± 0.017 [4] |
| Apparent magnitude (K) | 9.527 ± 0.015 [4] |
| Variable type | Planetary transit variable [3] |
| Astrometry | |
| Proper motion (μ) | RA: -19.7 ± 2.0 [2] mas/yr Dec.: 15.0 ± 1.9 [2] mas/yr |
| Distance | 560 ± 39 [5] ly (172 ± 12 [5] pc) |
| Absolute magnitude (MV) | 5.02+0.14 −0.16 [5] |
| Details | |
| Mass | 1.027+0.057 −0.061 [5] M☉ |
| Radius | 0.94 ± 0.02 [6] R☉ |
| Luminosity | 0.86+0.12 −0.10 [5] L☉ |
| Surface gravity (log g) | 4.53 ± 0.06 [5] |
| Temperature | 5750 ± 75 [5] K |
| Metallicity [Fe/H] | 0.02 ± 0.08 [5] dex |
| Age | 1.0+3.1 −0.9 [5] Gyr |
| Other designations | |
XO-1 is a magnitude 11 yellow dwarf star located approximately 560 light-years away[5] in the constellation Corona Borealis. XO-1 has a mass and radius similar to the Sun. In 2006 the extrasolar planet XO-1b was discovered orbiting XO-1 by the transit method using the XO Telescope.[3]
Contents |
[edit] Planetary system
The XO Project is an international team of professional and amateur astronomers which discovered the Jupiter-sized planet orbiting around XO-1. The team, led by Peter McCullough of the Space Telescope Science Institute in Baltimore, includes four amateur astronomers from North America and Europe. The planet was confirmed using the Harlan J. Smith Telescope and Hobby-Eberly Telescope at McDonald Observatory of the University of Texas.[3]
Further observations with the NICMOS instrument on board the Hubble Space Telescope detected the presence of water vapor, methane, and carbon dioxide in the atmosphere of XO-1b.[8] However a independent reinvestigation of the same data was unable to reproduce these results.[9]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| XO-1b | 0.92 ± 0.08 MJ | 0.049 ± 0.001 | 3.94150685 ± 0.00000091 | 0(assumed) [note 1] |
[edit] See also
- XO Telescope or XO
- SuperWASP or WASP
- List of extrasolar planets
[edit] Notes
[edit] References
- ^ Roman (1987). "Constellation boundaries". Identification of a Constellation From Position. http://vizier.u-strasbg.fr/vizier/VizieR/constellations.htx. Retrieved 2012-01-05.
- ^ a b c d Hog et al. (2000). "Tyc 2041-1657-1". The Tycho-2 Catalogue. http://vizier.u-strasbg.fr/viz-bin/VizieR-S?TYC%202041-1657-1. Retrieved 2012-01-05.
- ^ a b c d e f g h McCullough, P. R. et al (2006). "A Transiting Planet of a Sun-like Star". The Astrophysical Journal 648 (2): 1228–1238. arXiv:astro-ph/0605414. Bibcode 2006ApJ...648.1228M. doi:10.1086/505651. http://iopscience.iop.org/0004-637X/648/2/1228/fulltext/.
- ^ a b c Cutri et al. (2003). "2MASS===16021184+2810105". 2MASS All-Sky Catalog of Point Sources. http://vizier.u-strasbg.fr/viz-bin/VizieR-S?2MASS%20J16021184%2b2810105. Retrieved 2012-01-05.
- ^ a b c d e f g h i j Torres, Guillermo et al (2008). "Improved Parameters for Extrasolar Transiting Planets". The Astrophysical Journal 677 (2): 1324–1342. arXiv:0801.1841. Bibcode 2008ApJ...677.1324T. doi:10.1086/529429. http://iopscience.iop.org/0004-637X/677/2/1324/fulltext/.
- ^ a b Burke, Christopher J. et al (2010). "NICMOS Observations of the Transiting Hot Jupiter XO-1b". The Astrophysical Journal 719 (2): 1796–1806. arXiv:1006.1953. Bibcode 2010ApJ...719.1796B. doi:10.1088/0004-637X/719/2/1796. http://iopscience.iop.org/0004-637X/719/2/1796/fulltext/.
- ^ "SIMBAD query result: TYC 2041-1657-1 -- Variable Star". Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=GSC02041-01657. Retrieved 2009-04-24.
- ^ Tinetti, G. et al (2010). "Probing the Terminator Region Atmosphere of the Hot-Jupiter XO-1b with Transmission Spectroscopy". The Astrophysical Journal Letters 712 (2): L139–L142. arXiv:1002.2434. Bibcode 2010ApJ...712L.139T. doi:10.1088/2041-8205/712/2/L139. http://iopscience.iop.org/2041-8205/712/2/L139/fulltext/.
- ^ Gibson, N. P. et al (2011). "A new look at NICMOS transmission spectroscopy of HD 189733, GJ-436 and XO-1: no conclusive evidence for molecular features". Monthly Notices of the Royal Astronomical Society 411 (4): 2199–2213. arXiv:1010.1753. Bibcode 2011MNRAS.411.2199G. doi:10.1111/j.1365-2966.2010.17837.x.
[edit] External links
- SpaceDaily: Astronomers Catch Planet By Unusual Means (May 19, 2006)
- "XO-1". Exoplanets. http://media4.obspm.fr/exoplanets/base/etoile.php?nom=XO-1. Retrieved 2009-04-28.
