Misplaced Pages

XO-2: Difference between revisions

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
Browse history interactively← Previous editNext edit →Content deleted Content addedVisualWikitext
Revision as of 17:19, 15 June 2014 editMike s (talk | contribs)Extended confirmed users21,551 edits update ref← Previous edit Revision as of 03:36, 2 July 2014 edit undoArtman40 (talk | contribs)2,039 edits New planets around its companion.Next edit →
Line 44: Line 44:
{{Starbox end}} {{Starbox end}}


'''XO-2''' (XO-2B to be precise, cf. next paragraph) is a cooler ]-like ] located approximately {{convert|148|pc|ly|disp=output number only}} ] away<ref name="Torres2008"/> from ] in the ]. It has a ] of 11 and cannot be seen with the naked eye but is visible through a small ]. This star is also notable for its large ].<ref name="SIMBAD"/> '''XO-2''' Is a binary star. It consists of two components '''XO2-S''' (Also known as '''XO-2A''') and '''XO2-N''' (Also known as '''XO-2B'''). <ref name="Desidera2014"/>
Both of these stars are nearly identical and are cooler ]-like ]s located approximately {{convert|148|pc|ly|disp=output number only}} ] away<ref name="Torres2008"/> from ] in the ]. It has a ] of 11 and cannot be seen with the naked eye but is visible through a small ]. These stars are also notable for their large ]s.<ref name="SIMBAD"/>
This star (XO-2B, the northernmost star) is in a very wide ] system with a nearly identical star (XO-2A, the southernmost star) at a separation of approximately {{formatnum:4600}} ].<ref name="Burke2007"/> XO-2N and XO-2S have a separation of approximately {{formatnum:4600}} ].<ref name="Burke2007"/>


== Planetary system == == Planetary systems ==
One known ], ] (or rarely XO-2Bb), which is classified as a ], was discovered by the ] using the ] orbiting XO-2 (XO-2B) in 2007.<ref name="Burke2007"/> One known ], ] (or rarely XO-2Bb), which is classified as a ], was discovered by the ] using the ] orbiting XO-2N (XO-2B) in 2007. <ref name="Burke2007"/>

Two planets were reported to orbit around XO-2S in 2014. One of them is Jupiter-mass and another has a mass comparable to Saturn. <ref name="Desidera2014"/>

{{OrbitboxPlanet begin
| table_ref = <ref name="Desidera2014"/>
}}
{{OrbitboxPlanet
| exoplanet = ]
| mass = ≥ 0.259 ± 0.014
| period = 8.157 ± 0.034
| semimajor = 0.1344 ±0.0025
| eccentricity = 0.18 ± 0.035
}}
{{OrbitboxPlanet
| exoplanet = ]
| mass = ≥ 1.37 ± 0.053
| period = 20.8 ± 0.034
| semimajor = 0.4756 ±0.0087
| eccentricity =0.1528 ± 0.01
}}
{{Orbitbox end}}


{{OrbitboxPlanet begin {{OrbitboxPlanet begin
Line 55: Line 78:
}} }}
{{OrbitboxPlanet {{OrbitboxPlanet
| exoplanet = ] | exoplanet = ]
| mass = 0.62 ± 0.02 | mass = 0.62 ± 0.02
| radius = 0.973 ± 0.03
| period = 2.61586178 ± 0.00000075 | period = 2.61586178 ± 0.00000075
| semimajor = 0.0369 ±0.002 | semimajor = 0.0369 ±0.002
| eccentricity = 0.045 ± 0.024 | eccentricity = 0.045 ± 0.024
| inclination = 88.7 ± 1.3
}} }}
{{Orbitbox end}} {{Orbitbox end}}



== See also == == See also ==
Line 87: Line 113:


<ref name="Torres2008">{{cite journal | title=Improved Parameters for Extrasolar Transiting Planets | url=http://iopscience.iop.org/0004-637X/677/2/1324/fulltext/ | last1=Torres | first1=Guillermo | last2=Winn | first2=Joshua N. | last3=Holman | first3=Matthew J. | display-authors=1 | journal=The Astrophysical Journal | year=2008 | volume=677 | issue=2 | pages=1324–1342 | arxiv=0801.1841 | bibcode=2008ApJ...677.1324T | doi=10.1086/529429 }}</ref> <ref name="Torres2008">{{cite journal | title=Improved Parameters for Extrasolar Transiting Planets | url=http://iopscience.iop.org/0004-637X/677/2/1324/fulltext/ | last1=Torres | first1=Guillermo | last2=Winn | first2=Joshua N. | last3=Holman | first3=Matthew J. | display-authors=1 | journal=The Astrophysical Journal | year=2008 | volume=677 | issue=2 | pages=1324–1342 | arxiv=0801.1841 | bibcode=2008ApJ...677.1324T | doi=10.1086/529429 }}</ref>

<ref name="Desidera2014">{{cite web | url=http://arxiv.org/abs/1407.0251 | The GAPS programme with HARPS-N@TNG IV: A planetary system around XO-2S | accessdate=2014-07-02 }}</ref>


}} }}

Revision as of 03:36, 2 July 2014

XO-2
Observation data
Epoch 2000      Equinox 2000
Constellation Lynx
Right ascension 07 48 06.468
Declination +50° 13′ 32.96″
Apparent magnitude (V) 11.18 ± 0.03
Characteristics
Spectral type K0V
Apparent magnitude (B) 11.95 ± 0.11
Apparent magnitude (V) 11.18 ± 0.03
Apparent magnitude (J) 9.744 ± 0.022
Apparent magnitude (H) 9.340 ± 0.026
Apparent magnitude (K) 9.308 ± 0.021
Astrometry
Proper motion (μ) RA: -34.7 ± 2.6 mas/yr
Dec.: -153.6 ± 2.4 mas/yr
Distance483 ± 33 ly
(148 ± 10 pc)
Details
Mass0.971 ± 0.034 M☉
Radius0.976
−0.016 R☉
Temperature5340 ± 32 K
Metallicity 0.44 ± 0.02 dex
Age6.3 ± 2.4 Gyr
Other designations
TYC 3413-5-1, GSC 03413-00005, 2MASS J07480647+5013328

XO-2 Is a binary star. It consists of two components XO2-S (Also known as XO-2A) and XO2-N (Also known as XO-2B).

Both of these stars are nearly identical and are cooler Sun-like stars located approximately 480 light-years away from Earth in the Lynx constellation. It has a magnitude of 11 and cannot be seen with the naked eye but is visible through a small telescope. These stars are also notable for their large proper motions.

XO-2N and XO-2S have a separation of approximately 4,600 AU.

Planetary systems

One known exoplanet, XO-2b (or rarely XO-2Bb), which is classified as a hot Jupiter, was discovered by the XO Telescope using the transit method orbiting XO-2N (XO-2B) in 2007.

Two planets were reported to orbit around XO-2S in 2014. One of them is Jupiter-mass and another has a mass comparable to Saturn.

The XO-2 planetary system
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b ≥ 0.259 ± 0.014 MJ 0.1344 ±0.0025 8.157 ± 0.034 0.18 ± 0.035 — —
c ≥ 1.37 ± 0.053 MJ 0.4756 ±0.0087 20.8 ± 0.034 0.1528 ± 0.01 — —
The XO-2 planetary system
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b 0.62 ± 0.02 MJ 0.0369 ±0.002 2.61586178 ± 0.00000075 0.045 ± 0.024 88.7 ± 1.3° 0.973 ± 0.03 RJ


See also

References

  1. Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific. 99 (617): 695–699. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Vizier query form
  2. ^ Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27 – L30. Bibcode:2000A&A...355L..27H. Vizier catalog entry
  3. ^ Burke, Christopher J.; et al. (2007). "XO-2b: Transiting Hot Jupiter in a Metal-rich Common Proper Motion Binary". The Astrophysical Journal. 671 (2): 2115–2128. arXiv:0705.0003. Bibcode:2007ApJ...671.2115B. doi:10.1086/523087.
  4. ^ "TYC 3413-5-1 -- High proper-motion Star". Centre de Données astronomiques de Strasbourg. Retrieved 2012-01-15.
  5. ^ Cutri; et al. (2003). "2MASS===07480647+2b5013328". 2MASS All-Sky Catalog of Point Sources. Retrieved 2012-01-08. {{cite web}}: Explicit use of et al. in: |author= (help)
  6. ^ 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.
  7. ^ Fernandez, Jose M.; et al. (2009). "The Transit Light Curve Project. XII. Six Transits of the Exoplanet XO-2b". The Astronomical Journal. 137 (6): 4911–4916. arXiv:0903.2687. Bibcode:2009AJ....137.4911F. doi:10.1088/0004-6256/137/6/4911.
  8. ^ http://arxiv.org/abs/1407.0251. Retrieved 2014-07-02. {{cite web}}: Missing or empty |title= (help); Text "The GAPS programme with HARPS-N@TNG IV: A planetary system around XO-2S" ignored (help)
  9. Narita, Norio; et al. (2011). "XO-2b: a Prograde Planet with a Negligible Eccentricity and an Additional Radial Velocity Variation". Publications of the Astronomical Society of Japan. 63 (6): L67 – L71. arXiv:1110.6136. Bibcode:2011PASJ...63L..67N. doi:10.1093/pasj/63.6.l67.
  10. Sing, D. K.; et al. (2011). "Gran Telescopio Canarias OSIRIS transiting exoplanet atmospheric survey: detection of potassium in XO-2b from narrowband spectrophotometry". Astronomy and Astrophysics. 527. article number A73. arXiv:1008.4795. Bibcode:2011A&A...527A..73S. doi:10.1051/0004-6361/201015579.

External links


Constellation of Lynx
Stars
Bayer
Flamsteed
Variable
HR
HD
Other
Exoplanets
Star clusters
Nebulae
Galaxies
NGC
Other
Galaxy clusters
Astronomical events
Category
Stub icon

This main-sequence-star-related article is a stub. You can help Misplaced Pages by expanding it.

Categories: