View source for OGLE-2003-BLG-235L

{{short description|Microlensing event in the constellation Sagittarius}}
{{Starbox begin
| name = [[Optical Gravitational Lensing Experiment|OGLE]]-2003-BLG-235L
}}
{{Starbox observe
| epoch = [[J2000.0]]
| constell = [[Sagittarius (constellation)|Sagittarius]]
| ra = {{RA|18|05|16.35}}<ref name="SIMBAD">{{cite web
| url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=EWS+2003-BUL-235
| title =SIMBAD query result: NAME OGLE 2003-BLG-235 -- Star
| publisher=[[Centre de Données astronomiques de Strasbourg]]
| access-date=2009-04-30 }}</ref>
| dec = {{DEC|–28|53|42.0}}<ref name="SIMBAD" />
| appmag_v = 19.7
}}
{{Starbox character
| class = K5<ref name="SIMBAD" />
| variable=
}}
{{Starbox astrometry
| dist_ly = ~19000
| dist_pc = ~5800
}}
{{Starbox detail
| mass = 0.63 ±0.08
| radius =
}}
{{Starbox reference
| Simbad = EWS+2003-BUL-235
| EPE = OGLE235-MOA53
}}
{{Starbox end}}
'''OGLE-2003-BLG-235L''' ('''MOA-2003-BLG-53L''') is a star in the [[constellation]] of [[Sagittarius (constellation)|Sagittarius]].  The first [[gravitational microlensing]] event for which a planet orbiting the lens was detected around this star. The event occurred in  during July 2003. Two groups observed and independently detected the event: the [[Optical Gravitational Lensing Experiment]] (OGLE) and the [[Microlensing Observations in Astrophysics]] (MOA), hence, the double designation.<ref name="Bond2004"/>  It is an [[orange dwarf]] star of spectral type K, which is accompanied by a [[giant planet]].<ref name="bennett2006"/>
==Lens system==
OGLE-2003-BLG-235L and MOA-2003-BLG-53L is the designation given to the star in the lens system.<ref>{{cite web|url=http://planetquest.jpl.nasa.gov/NavigatorForum/documents/May18-2007/10-AnExtrasolarPlanetCensusMicrolensingPlanetFinder-Bennett.pdf|title=The Microlensing Planet Finder (MPF)|author=David Bennett|work=Navigator Program Forum-2007: Small- and Mid-Scale Exoplanet Space Missions|url-status=dead|archive-url=https://web.archive.org/web/20110608231902/http://planetquest.jpl.nasa.gov/NavigatorForum/documents/May18-2007/10-AnExtrasolarPlanetCensusMicrolensingPlanetFinder-Bennett.pdf|archive-date=2011-06-08}}</ref> In 2004, analysis of the light curve produced as it passed in front of the source star allowed detection of an [[exoplanet]] orbiting the star with a mass 0.0039 times that of the host star (this would put it in the [[Jupiter|jovian]] mass range). The star was originally assumed to be a [[red dwarf]] star, since they are the most common type of star in the galaxy.<ref name="Bond2004"/>
By 2006, the source and lens star had moved far enough apart (as viewed from Earth) that their light could be separated. Observations by the [[Hubble Space Telescope]] revealed that in fact the lens star was actually brighter and less red than expected, matching the expected spectra for a K dwarf of about 0.63 [[solar mass]]es, more massive than the average star in the galaxy.<ref name="bennett2006"/> This enables an estimate of the distance to the lens star, which puts it at around 5.8 kiloparsecs (19,000 light years) away.
===Planetary system===
The OGLE-2003-BLG-235L/MOA-2003-BLG-53L system consists of one planet as determined by the discovery team and the follow-up confirmation observations.
{{OrbitboxPlanet begin
| name = OGLE-2003-BLG-235L/MOA-2003-BLG-53L
| table_ref = <ref name="bennett2006"/>
}}
{{OrbitboxPlanet
| exoplanet = [[OGLE-2003-BLG-235Lb/MOA-2003-BLG-53Lb|b]]
| mass = 2.6{{±|0.8|0.6}}
| semimajor = 4.3{{±|2.5|0.8}}
}}
{{Orbitbox end}}
== See also ==
* [[Optical Gravitational Lensing Experiment]] or OGLE
* [[List of extrasolar planets]]
==References==
{{Reflist|refs=
<ref name="bennett2006">{{cite journal | title=Identification of the OGLE-2003-BLG-235/MOA-2003-BLG-53 Planetary Host Star | last1=Bennett | first1=David P. | last2=Anderson | first2=Jay | last3=Bond | first3=Ian A. | last4=Udalski | first4=Andrzej | last5=Gould  | first5=Andrew | display-authors=1 | journal=The Astrophysical Journal Letters | volume=647 | issue=2 | pages=L171–L174 | year=2006 | bibcode=2006ApJ...647L.171B | doi=10.1086/507585 | arxiv=astro-ph/0606038 | s2cid=11294425 }}</ref>
<ref name="Bond2004">{{cite journal | title=OGLE 2003-BLG-235/MOA 2003-BLG-53: A Planetary Microlensing Event | last1=Bond | first1=I. A. | last2=Udalski | first2=A. | last3=Jaroszyński | first3=M. | last4=Rattenbury | first4=N. J. | last5=Paczyński  | first5=B. | last6=Soszyński  | first6=I. | last7=Wyrzykowski | first7=L. | last8=Szymański | first8=M. K. | last9=Kubiak | first9=M. | display-authors=1 | year=2004 | journal=The Astrophysical Journal Letters | volume=606 | issue=2 | pages=L155–L158 | doi=10.1086/420928 | bibcode=2004ApJ...606L.155B|arxiv = astro-ph/0404309 | s2cid=17610640 }}</ref>
}}
==External links==
* {{cite web
| url=http://media4.obspm.fr/exoplanets/base/etoile.php?nom=OGLE235-MOA53
| title=OGLE235-MOA53
| work=Exoplanets
| access-date=2009-04-30
| archive-url=https://web.archive.org/web/20160303192233/http://media4.obspm.fr/exoplanets/base/etoile.php?nom=OGLE235-MOA53
| archive-date=2016-03-03
| url-status=dead
}}
{{Sky|18|05|16.35|-|28|53|42.0|19000}}
{{Stars of Sagittarius}}
{{DEFAULTSORT:OGLE-2003-BLG-235}}
[[Category:K-type main-sequence stars]]
[[Category:Sagittarius (constellation)]]
[[Category:Planetary systems with one confirmed planet]]
[[Category:Gravitational lensing]]
{{main-star-stub}}
[[ru:OGLE-2003-BLG-235Lb]]