XO-5b "Makropulos"is anextrasolar planetapproximately 910light yearsaway in theconstellationofLynx.This planet was found by thetransit methodusing theXO Telescopeand announced in May 2008. It was also independently discovered by theHATNet Project.The planet has a mass and radius just slightly larger than that ofJupiter.This planet orbits very close to theG-typeparent star, as it is typical for transiting planets, classing this asHot Jupiter.It takes only 4.188 days (or 100.5 hours) to orbit at an orbital distance of 0.0488AU).[1][2]
 Size comparison of Jupiter (left) with XO-5b (right). | |
| Discovery | |
|---|---|
| Discovered by | XO Project[1] |
| Discovery site | XO TelescopeatMaui,Hawaii[1] |
| Discovery date | 2008 |
| Transit[1] | |
| Orbital characteristics | |
| 0.0488 ± 0.0006 AU (7,300,000 ± 90,000 km)[2] | |
| Eccentricity | 0[note 1] |
| 4.1877545 ± 0.0000016[3]d | |
| Inclination | 86.7 ± 0.4[2] |
| Semi-amplitude | 144.9 ± 2.0[2] |
| Star | XO-5 |
| Physical characteristics | |
| 1.109 ± 0.050[2]RJ | |
| Mass | 1.059 ± 0.028[2]MJ |
Meandensity | 0.96+0.14 −0.11[2]gcm−3 |
| 22 ± 5m/s2(72 ± 16ft/s2)[1] | |
| Temperature | 1221 ± 27 K[2] |
The planet XO-5b is named Makropulos. The name was selected in theNameExoWorldscampaign by theCzech Republic,during the 100th anniversary of theIAU.Makropulos is the name fromKarel Čapek's playVěc Makropulos(The Makropulos Affair).[4][5]
Discovery
editXO-5b was the fifth hot Jupitertransitingplanet discovered by theXO Projectand was identified as a possible candidate extrasolar planet from two seasons of observations, November 2003 to March 2004 and November 2004 to March 2005. Follow-upphotometrywas provided by the extended team, a collaboration of professional and amateur astronomers. The team obtained better-qualitylight curvesto guide the photometric andspectroscopicfollow-up necessary to classify a candidate as an actual planetary companion.[1]
To confirm XO-5b's planetary natureradial velocityobservations of XO-5 were made with the high-resolutionspectrographon the 11-meterHobby–Eberly Telescopelocated atMcDonald Observatory,in order to measure the mass of the planet. Commencing on December 7, 2007, a total of ten radial velocity measurements were made which confirmed XO-5b's status as a planet.[1]
Notes
editSee also
editReferences
edit- ^abcdefgBurke, Christopher J.; et al. (2008). "XO-5b: A Transiting Jupiter-sized Planet with a 4 day Period".The Astrophysical Journal.686(2): 1331–1340.arXiv:0805.2399.Bibcode:2008ApJ...686.1331B.doi:10.1086/591497.S2CID14043772.
- ^abcdefghiPál, A.; et al. (2009). "Independent Confirmation and Refined Parameters of the Hot Jupiter XO-5b".The Astrophysical Journal.700(1): 783–790.arXiv:0810.0260.Bibcode:2009ApJ...700..783P.doi:10.1088/0004-637X/700/1/783.S2CID18318327.
- ^Sada, Pedro V.; et al. (2012). "Extrasolar Planet Transits Observed at Kitt Peak National Observatory".Publications of the Astronomical Society of the Pacific.124(913): 212–229.arXiv:1202.2799.Bibcode:2012PASP..124..212S.doi:10.1086/665043.S2CID29665395.
- ^"Approved names".NameExoworlds.Retrieved2020-01-02.
- ^"International Astronomical Union | IAU".www.iau.org.Retrieved2020-01-02.
External links
edit
Media related toXO-5bat Wikimedia Commons
- "XO-5".Exoplanets.Archived fromthe originalon 2016-03-03.Retrieved2008-08-06.
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