OGLE-2014-BLG-0319: A Sub-Jupiter-mass Planetary Event Encountered Degeneracy with Different Mass Ratios and Lens-source Relative Proper Motions
We report the discovery of a sub-Jovian-mass planet, OGLE-2014-BLG-0319Lb. The characteristics of this planet will be added into a future extended statistical analysis of the Microlensing Observations in Astrophysics (MOA) collaboration. The planetary anomaly of the light curve is characterized by M...
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| Veröffentlicht in: | The Astronomical Journal 2022-03, Vol.163 (3), p.123 |
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| creator | Miyazaki, Shota Suzuki, Daisuke Udalski, Andrzej Koshimoto, Naoki Bennett, David P. Sumi, Takahiro Rattenbury, Nicholas Cheongho, Han Abe, Fumio Barry, Richard K. Bhattacharya, Aparna Bond, Ian A. Fukui, Akihiko Fujii, Hirosane Hirao, Yuki Silva, Stela Ishitani Itow, Yoshitaka Kirikawa, Rintaro Kondo, Iona Munford, Brandon Matsubara, Yutaka Matsumoto, Sho Muraki, Yasushi Okamura, Arisa Olmschenk, Greg Ranc, Clément Satoh, Yuki K. Toda, Taiga Tristram, Paul J. Yama, Hibiki Yonehara, Atsunori Poleski, Radek Mróz, Przemek Skowron, Jan Szymański, Michal K. Soszyński, Igor Pietrukowicz, Pawel Kozłowski, Syzmon Ulaczyk, Krzysztof Wyrzykowski, Łukasz |
| description | We report the discovery of a sub-Jovian-mass planet, OGLE-2014-BLG-0319Lb. The characteristics of this planet will be added into a future extended statistical analysis of the Microlensing Observations in Astrophysics (MOA) collaboration. The planetary anomaly of the light curve is characterized by MOA and OGLE survey observations and results in three degenerate models with different planetary-mass ratios of
q
= (10.3, 6.6, 4.5) × 10
−4
. We find that the last two models require unreasonably small lens-source relative proper motions of
μ
rel
∼ 1 mas yr
−1
. Considering Galactic prior probabilities, we rule out these two models from the final result. We conduct a Bayesian analysis to estimate physical properties of the lens system using a Galactic model and find that the lens system is composed of a
0.49
−
0.27
+
0.35
M
Jup
sub-Jovian planet orbiting a
0.47
−
0.25
+
0.33
M
⊙
M dwarf near the Galactic Bulge. This analysis demonstrates that Galactic priors are useful to resolve this type of model degeneracy. This is important for estimating the mass-ratio function statistically. However, this method would be unlikely successful in shorter timescale events, which are mostly due to low-mass objects, like brown dwarfs or free-floating planets. Therefore, careful treatment is needed for estimating the mass-ratio function of the companions around such low-mass hosts, which only the microlensing can probe. |
| doi_str_mv | 10.3847/1538-3881/ac4960 |
| format | Article |
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q
= (10.3, 6.6, 4.5) × 10
−4
. We find that the last two models require unreasonably small lens-source relative proper motions of
μ
rel
∼ 1 mas yr
−1
. Considering Galactic prior probabilities, we rule out these two models from the final result. We conduct a Bayesian analysis to estimate physical properties of the lens system using a Galactic model and find that the lens system is composed of a
0.49
−
0.27
+
0.35
M
Jup
sub-Jovian planet orbiting a
0.47
−
0.25
+
0.33
M
⊙
M dwarf near the Galactic Bulge. This analysis demonstrates that Galactic priors are useful to resolve this type of model degeneracy. This is important for estimating the mass-ratio function statistically. However, this method would be unlikely successful in shorter timescale events, which are mostly due to low-mass objects, like brown dwarfs or free-floating planets. Therefore, careful treatment is needed for estimating the mass-ratio function of the companions around such low-mass hosts, which only the microlensing can probe.</description><identifier>ISSN: 0004-6256</identifier><identifier>EISSN: 1538-3881</identifier><identifier>DOI: 10.3847/1538-3881/ac4960</identifier><language>eng</language><publisher>Madison: The American Astronomical Society</publisher><subject>Astronomical models ; Astronomy ; Astrophysics ; Bayesian analysis ; Binary lens microlensing ; Exoplanet astronomy ; Exoplanet detection methods ; Exoplanets ; Extrasolar planets ; Galactic bulge ; Gravitational microlensing ; Jupiter ; Lenses ; Light curve ; Mass ratios ; Microlenses ; Modelling ; Physical properties ; Planets ; Proper motion ; Rogue planets ; Sciences of the Universe ; Statistical analysis</subject><ispartof>The Astronomical Journal, 2022-03, Vol.163 (3), p.123</ispartof><rights>2022. The American Astronomical Society. All rights reserved.</rights><rights>2022. The American Astronomical Society. All rights reserved. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). 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J</addtitle><description>We report the discovery of a sub-Jovian-mass planet, OGLE-2014-BLG-0319Lb. The characteristics of this planet will be added into a future extended statistical analysis of the Microlensing Observations in Astrophysics (MOA) collaboration. The planetary anomaly of the light curve is characterized by MOA and OGLE survey observations and results in three degenerate models with different planetary-mass ratios of
q
= (10.3, 6.6, 4.5) × 10
−4
. We find that the last two models require unreasonably small lens-source relative proper motions of
μ
rel
∼ 1 mas yr
−1
. Considering Galactic prior probabilities, we rule out these two models from the final result. We conduct a Bayesian analysis to estimate physical properties of the lens system using a Galactic model and find that the lens system is composed of a
0.49
−
0.27
+
0.35
M
Jup
sub-Jovian planet orbiting a
0.47
−
0.25
+
0.33
M
⊙
M dwarf near the Galactic Bulge. This analysis demonstrates that Galactic priors are useful to resolve this type of model degeneracy. This is important for estimating the mass-ratio function statistically. However, this method would be unlikely successful in shorter timescale events, which are mostly due to low-mass objects, like brown dwarfs or free-floating planets. Therefore, careful treatment is needed for estimating the mass-ratio function of the companions around such low-mass hosts, which only the microlensing can probe.</description><subject>Astronomical models</subject><subject>Astronomy</subject><subject>Astrophysics</subject><subject>Bayesian analysis</subject><subject>Binary lens microlensing</subject><subject>Exoplanet astronomy</subject><subject>Exoplanet detection methods</subject><subject>Exoplanets</subject><subject>Extrasolar planets</subject><subject>Galactic bulge</subject><subject>Gravitational microlensing</subject><subject>Jupiter</subject><subject>Lenses</subject><subject>Light curve</subject><subject>Mass ratios</subject><subject>Microlenses</subject><subject>Modelling</subject><subject>Physical properties</subject><subject>Planets</subject><subject>Proper motion</subject><subject>Rogue planets</subject><subject>Sciences of the Universe</subject><subject>Statistical 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A Sub-Jupiter-mass Planetary Event Encountered Degeneracy with Different Mass Ratios and Lens-source Relative Proper Motions</title><author>Miyazaki, Shota ; Suzuki, Daisuke ; Udalski, Andrzej ; Koshimoto, Naoki ; Bennett, David P. ; Sumi, Takahiro ; Rattenbury, Nicholas ; Cheongho, Han ; Abe, Fumio ; Barry, Richard K. ; Bhattacharya, Aparna ; Bond, Ian A. ; Fukui, Akihiko ; Fujii, Hirosane ; Hirao, Yuki ; Silva, Stela Ishitani ; Itow, Yoshitaka ; Kirikawa, Rintaro ; Kondo, Iona ; Munford, Brandon ; Matsubara, Yutaka ; Matsumoto, Sho ; Muraki, Yasushi ; Okamura, Arisa ; Olmschenk, Greg ; Ranc, Clément ; Satoh, Yuki K. ; Toda, Taiga ; Tristram, Paul J. ; Yama, Hibiki ; Yonehara, Atsunori ; Poleski, Radek ; Mróz, Przemek ; Skowron, Jan ; Szymański, Michal K. ; Soszyński, Igor ; Pietrukowicz, Pawel ; Kozłowski, Syzmon ; Ulaczyk, Krzysztof ; Wyrzykowski, Łukasz</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c338t-157e8b0a42cf4462889ff70ddb1f33fbe19abefb8ed039c5fae0d88e7ce04fb53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Astronomical models</topic><topic>Astronomy</topic><topic>Astrophysics</topic><topic>Bayesian analysis</topic><topic>Binary lens microlensing</topic><topic>Exoplanet astronomy</topic><topic>Exoplanet detection methods</topic><topic>Exoplanets</topic><topic>Extrasolar planets</topic><topic>Galactic bulge</topic><topic>Gravitational microlensing</topic><topic>Jupiter</topic><topic>Lenses</topic><topic>Light curve</topic><topic>Mass ratios</topic><topic>Microlenses</topic><topic>Modelling</topic><topic>Physical properties</topic><topic>Planets</topic><topic>Proper motion</topic><topic>Rogue planets</topic><topic>Sciences of the Universe</topic><topic>Statistical 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Krzysztof</creatorcontrib><creatorcontrib>Wyrzykowski, Łukasz</creatorcontrib><creatorcontrib>MOA Collaboration</creatorcontrib><creatorcontrib>OGLE Collaboration</creatorcontrib><creatorcontrib>Leading Authors</creatorcontrib><collection>IOP Publishing Free Content</collection><collection>IOPscience (Open Access)</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><jtitle>The Astronomical Journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Miyazaki, Shota</au><au>Suzuki, Daisuke</au><au>Udalski, Andrzej</au><au>Koshimoto, Naoki</au><au>Bennett, David P.</au><au>Sumi, Takahiro</au><au>Rattenbury, Nicholas</au><au>Cheongho, Han</au><au>Abe, Fumio</au><au>Barry, Richard K.</au><au>Bhattacharya, Aparna</au><au>Bond, Ian A.</au><au>Fukui, Akihiko</au><au>Fujii, Hirosane</au><au>Hirao, Yuki</au><au>Silva, Stela Ishitani</au><au>Itow, Yoshitaka</au><au>Kirikawa, Rintaro</au><au>Kondo, Iona</au><au>Munford, Brandon</au><au>Matsubara, Yutaka</au><au>Matsumoto, Sho</au><au>Muraki, Yasushi</au><au>Okamura, Arisa</au><au>Olmschenk, Greg</au><au>Ranc, Clément</au><au>Satoh, Yuki K.</au><au>Toda, Taiga</au><au>Tristram, Paul J.</au><au>Yama, Hibiki</au><au>Yonehara, Atsunori</au><au>Poleski, Radek</au><au>Mróz, Przemek</au><au>Skowron, Jan</au><au>Szymański, Michal K.</au><au>Soszyński, Igor</au><au>Pietrukowicz, Pawel</au><au>Kozłowski, Syzmon</au><au>Ulaczyk, Krzysztof</au><au>Wyrzykowski, Łukasz</au><aucorp>MOA Collaboration</aucorp><aucorp>OGLE Collaboration</aucorp><aucorp>Leading Authors</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>OGLE-2014-BLG-0319: A Sub-Jupiter-mass Planetary Event Encountered Degeneracy with Different Mass Ratios and Lens-source Relative Proper Motions</atitle><jtitle>The Astronomical Journal</jtitle><stitle>AJ</stitle><addtitle>Astron. J</addtitle><date>2022-03-01</date><risdate>2022</risdate><volume>163</volume><issue>3</issue><spage>123</spage><pages>123-</pages><issn>0004-6256</issn><eissn>1538-3881</eissn><abstract>We report the discovery of a sub-Jovian-mass planet, OGLE-2014-BLG-0319Lb. The characteristics of this planet will be added into a future extended statistical analysis of the Microlensing Observations in Astrophysics (MOA) collaboration. The planetary anomaly of the light curve is characterized by MOA and OGLE survey observations and results in three degenerate models with different planetary-mass ratios of
q
= (10.3, 6.6, 4.5) × 10
−4
. We find that the last two models require unreasonably small lens-source relative proper motions of
μ
rel
∼ 1 mas yr
−1
. Considering Galactic prior probabilities, we rule out these two models from the final result. We conduct a Bayesian analysis to estimate physical properties of the lens system using a Galactic model and find that the lens system is composed of a
0.49
−
0.27
+
0.35
M
Jup
sub-Jovian planet orbiting a
0.47
−
0.25
+
0.33
M
⊙
M dwarf near the Galactic Bulge. This analysis demonstrates that Galactic priors are useful to resolve this type of model degeneracy. This is important for estimating the mass-ratio function statistically. However, this method would be unlikely successful in shorter timescale events, which are mostly due to low-mass objects, like brown dwarfs or free-floating planets. Therefore, careful treatment is needed for estimating the mass-ratio function of the companions around such low-mass hosts, which only the microlensing can probe.</abstract><cop>Madison</cop><pub>The American Astronomical Society</pub><doi>10.3847/1538-3881/ac4960</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0001-5207-5619</orcidid><orcidid>https://orcid.org/0000-0002-4035-5012</orcidid><orcidid>https://orcid.org/0000-0003-4916-0892</orcidid><orcidid>https://orcid.org/0000-0001-9818-1513</orcidid><orcidid>https://orcid.org/0000-0001-5069-319X</orcidid><orcidid>https://orcid.org/0000-0002-2641-9964</orcidid><orcidid>https://orcid.org/0000-0003-4776-8618</orcidid><orcidid>https://orcid.org/0000-0003-2267-1246</orcidid><orcidid>https://orcid.org/0000-0003-2388-4534</orcidid><orcidid>https://orcid.org/0000-0003-2302-9562</orcidid><orcidid>https://orcid.org/0000-0002-8198-1968</orcidid><orcidid>https://orcid.org/0000-0003-1978-2092</orcidid><orcidid>https://orcid.org/0000-0002-2335-1730</orcidid><orcidid>https://orcid.org/0000-0002-4909-5763</orcidid><orcidid>https://orcid.org/0000-0002-0548-8995</orcidid><orcidid>https://orcid.org/0000-0001-8472-2219</orcidid><orcidid>https://orcid.org/0000-0002-2339-5899</orcidid><orcidid>https://orcid.org/0000-0002-7777-0842</orcidid><orcidid>https://orcid.org/0000-0001-6364-408X</orcidid><orcidid>https://orcid.org/0000-0001-8043-8413</orcidid><orcidid>https://orcid.org/0000-0002-3401-1029</orcidid><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0004-6256 |
| ispartof | The Astronomical Journal, 2022-03, Vol.163 (3), p.123 |
| issn | 0004-6256 1538-3881 |
| language | eng |
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| source | IOP Publishing Free Content; DOAJ Directory of Open Access Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; IOPscience extra; Alma/SFX Local Collection |
| subjects | Astronomical models Astronomy Astrophysics Bayesian analysis Binary lens microlensing Exoplanet astronomy Exoplanet detection methods Exoplanets Extrasolar planets Galactic bulge Gravitational microlensing Jupiter Lenses Light curve Mass ratios Microlenses Modelling Physical properties Planets Proper motion Rogue planets Sciences of the Universe Statistical analysis |
| title | OGLE-2014-BLG-0319: A Sub-Jupiter-mass Planetary Event Encountered Degeneracy with Different Mass Ratios and Lens-source Relative Proper Motions |
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