OGLE-2014-BLG-1112LB: A Microlensing Brown Dwarf Detected through the Channel of a Gravitational Binary-lens Event
Due to the nature of the gravitational field, microlensing, in principle, provides an important tool for detecting faint and even dark brown dwarfs. However, the number of identified brown dwarfs is limited due to the difficulty of the lens mass measurement that is needed to check the substellar nat...
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| Veröffentlicht in: | The Astrophysical journal 2017-07, Vol.843 (2), p.87 |
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| creator | Han, C. Udalski, A. Bozza, V. Szyma ski, M. K. Soszy ski, I. Skowron, J. Mróz, P. Poleski, R. Pietrukowicz, P. Koz owski, S. Ulaczyk, K. Wyrzykowski, . Novati, S. Calchi D'Ago, G. Dominik, M. Hundertmark, M. Jorgensen, U. G. Scarpetta, G. |
| description | Due to the nature of the gravitational field, microlensing, in principle, provides an important tool for detecting faint and even dark brown dwarfs. However, the number of identified brown dwarfs is limited due to the difficulty of the lens mass measurement that is needed to check the substellar nature of the lensing object. In this work, we report a microlensing brown dwarf discovered from an analysis of the gravitational binary-lens event OGLE-2014-BLG-1112. We identify the brown dwarf nature of the lens companion by measuring the lens mass from the detections of both microlens-parallax and finite-source effects. We find that the companion has a mass of and it is orbiting a solar-type primary star with a mass of . The estimated projected separation between the lens components is 9.63 1.33 au and the distance to the lens is 4.84 0.67 kpc. We discuss the usefulness of space-based microlensing observations for detecting brown dwarfs through the channel of binary-lens events. |
| doi_str_mv | 10.3847/1538-4357/aa762f |
| format | Article |
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K. ; Soszy ski, I. ; Skowron, J. ; Mróz, P. ; Poleski, R. ; Pietrukowicz, P. ; Koz owski, S. ; Ulaczyk, K. ; Wyrzykowski, . ; Novati, S. Calchi ; D'Ago, G. ; Dominik, M. ; Hundertmark, M. ; Jorgensen, U. G. ; Scarpetta, G.</creator><creatorcontrib>Han, C. ; Udalski, A. ; Bozza, V. ; Szyma ski, M. K. ; Soszy ski, I. ; Skowron, J. ; Mróz, P. ; Poleski, R. ; Pietrukowicz, P. ; Koz owski, S. ; Ulaczyk, K. ; Wyrzykowski, . ; Novati, S. Calchi ; D'Ago, G. ; Dominik, M. ; Hundertmark, M. ; Jorgensen, U. G. ; Scarpetta, G. ; The OGLE Collaboration ; The MiNDSTEp Consortium</creatorcontrib><description>Due to the nature of the gravitational field, microlensing, in principle, provides an important tool for detecting faint and even dark brown dwarfs. However, the number of identified brown dwarfs is limited due to the difficulty of the lens mass measurement that is needed to check the substellar nature of the lensing object. In this work, we report a microlensing brown dwarf discovered from an analysis of the gravitational binary-lens event OGLE-2014-BLG-1112. We identify the brown dwarf nature of the lens companion by measuring the lens mass from the detections of both microlens-parallax and finite-source effects. We find that the companion has a mass of and it is orbiting a solar-type primary star with a mass of . The estimated projected separation between the lens components is 9.63 1.33 au and the distance to the lens is 4.84 0.67 kpc. We discuss the usefulness of space-based microlensing observations for detecting brown dwarfs through the channel of binary-lens events.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.3847/1538-4357/aa762f</identifier><language>eng</language><publisher>Philadelphia: The American Astronomical Society</publisher><subject>Astrophysics ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; binaries: general ; Brown dwarf stars ; brown dwarfs ; Companion stars ; DETECTION ; DISTANCE ; DWARF STARS ; Gravitation ; GRAVITATIONAL FIELDS ; GRAVITATIONAL LENSES ; gravitational lensing: micro ; Lenses ; MASS ; Microlenses ; Parallax ; SPACE ; Space telescopes</subject><ispartof>The Astrophysical journal, 2017-07, Vol.843 (2), p.87</ispartof><rights>2017. The American Astronomical Society. All rights reserved.</rights><rights>Copyright IOP Publishing Jul 10, 2017</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c444t-6dc8b54db446f3b4242d042cc9bb33b0de65e22d39711ce856de704092c3318b3</citedby><cites>FETCH-LOGICAL-c444t-6dc8b54db446f3b4242d042cc9bb33b0de65e22d39711ce856de704092c3318b3</cites><orcidid>0000-0002-3202-0343 ; 0000-0002-2641-9964 ; 0000-0003-4590-0136</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.3847/1538-4357/aa762f/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>230,314,780,784,885,27924,27925,38890,53867</link.rule.ids><linktorsrc>$$Uhttps://iopscience.iop.org/article/10.3847/1538-4357/aa762f$$EView_record_in_IOP_Publishing$$FView_record_in_$$GIOP_Publishing</linktorsrc><backlink>$$Uhttps://www.osti.gov/biblio/22876055$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Han, C.</creatorcontrib><creatorcontrib>Udalski, A.</creatorcontrib><creatorcontrib>Bozza, V.</creatorcontrib><creatorcontrib>Szyma ski, M. K.</creatorcontrib><creatorcontrib>Soszy ski, I.</creatorcontrib><creatorcontrib>Skowron, J.</creatorcontrib><creatorcontrib>Mróz, P.</creatorcontrib><creatorcontrib>Poleski, R.</creatorcontrib><creatorcontrib>Pietrukowicz, P.</creatorcontrib><creatorcontrib>Koz owski, S.</creatorcontrib><creatorcontrib>Ulaczyk, K.</creatorcontrib><creatorcontrib>Wyrzykowski, .</creatorcontrib><creatorcontrib>Novati, S. Calchi</creatorcontrib><creatorcontrib>D'Ago, G.</creatorcontrib><creatorcontrib>Dominik, M.</creatorcontrib><creatorcontrib>Hundertmark, M.</creatorcontrib><creatorcontrib>Jorgensen, U. G.</creatorcontrib><creatorcontrib>Scarpetta, G.</creatorcontrib><creatorcontrib>The OGLE Collaboration</creatorcontrib><creatorcontrib>The MiNDSTEp Consortium</creatorcontrib><title>OGLE-2014-BLG-1112LB: A Microlensing Brown Dwarf Detected through the Channel of a Gravitational Binary-lens Event</title><title>The Astrophysical journal</title><addtitle>APJ</addtitle><addtitle>Astrophys. J</addtitle><description>Due to the nature of the gravitational field, microlensing, in principle, provides an important tool for detecting faint and even dark brown dwarfs. However, the number of identified brown dwarfs is limited due to the difficulty of the lens mass measurement that is needed to check the substellar nature of the lensing object. In this work, we report a microlensing brown dwarf discovered from an analysis of the gravitational binary-lens event OGLE-2014-BLG-1112. We identify the brown dwarf nature of the lens companion by measuring the lens mass from the detections of both microlens-parallax and finite-source effects. We find that the companion has a mass of and it is orbiting a solar-type primary star with a mass of . The estimated projected separation between the lens components is 9.63 1.33 au and the distance to the lens is 4.84 0.67 kpc. We discuss the usefulness of space-based microlensing observations for detecting brown dwarfs through the channel of binary-lens events.</description><subject>Astrophysics</subject><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>binaries: general</subject><subject>Brown dwarf stars</subject><subject>brown dwarfs</subject><subject>Companion stars</subject><subject>DETECTION</subject><subject>DISTANCE</subject><subject>DWARF STARS</subject><subject>Gravitation</subject><subject>GRAVITATIONAL FIELDS</subject><subject>GRAVITATIONAL LENSES</subject><subject>gravitational lensing: micro</subject><subject>Lenses</subject><subject>MASS</subject><subject>Microlenses</subject><subject>Parallax</subject><subject>SPACE</subject><subject>Space telescopes</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNp1kEtPwzAQhC0EEqVw52iJK6Z-xUm49UVACuoFJG6W4zitqxIX223FvydRET1xWu1qZjT7AXBL8APLeDoiCcsQZ0k6UioVtDkDg7_TORhgjDkSLP24BFchrPuV5vkA-EVRzhHFhKNJWSBCCC0nj3AMX632bmPaYNslnHh3aOHsoHwDZyYaHU0N48q73XLVTQOnK9W2ZgNdAxUsvNrbqKJ1rdrAiW2V_0Z9FJzvTRuvwUWjNsHc_M4heH-av02fUbkoXqbjEmnOeUSi1lmV8LriXDSs4pTTuiutdV5VjFW4NiIxlNYsTwnRJktEbVLMcU41YySr2BDcHXNdiFYGbbveK-26njpKSrNU4CQ5qbbefe1MiHLtdr4rHiRlIslEzmivwkdVByUEbxq59faz-0sSLHv-socte9jyyL-z3B8t1m1Pmf_KfwBNqIMC</recordid><startdate>20170710</startdate><enddate>20170710</enddate><creator>Han, C.</creator><creator>Udalski, A.</creator><creator>Bozza, V.</creator><creator>Szyma ski, M. 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G.</creator><creator>Scarpetta, G.</creator><general>The American Astronomical Society</general><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0002-3202-0343</orcidid><orcidid>https://orcid.org/0000-0002-2641-9964</orcidid><orcidid>https://orcid.org/0000-0003-4590-0136</orcidid></search><sort><creationdate>20170710</creationdate><title>OGLE-2014-BLG-1112LB: A Microlensing Brown Dwarf Detected through the Channel of a Gravitational Binary-lens Event</title><author>Han, C. ; Udalski, A. ; Bozza, V. ; Szyma ski, M. K. ; Soszy ski, I. ; Skowron, J. ; Mróz, P. ; Poleski, R. ; Pietrukowicz, P. ; Koz owski, S. ; Ulaczyk, K. ; Wyrzykowski, . ; Novati, S. Calchi ; D'Ago, G. ; Dominik, M. ; Hundertmark, M. ; Jorgensen, U. 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In this work, we report a microlensing brown dwarf discovered from an analysis of the gravitational binary-lens event OGLE-2014-BLG-1112. We identify the brown dwarf nature of the lens companion by measuring the lens mass from the detections of both microlens-parallax and finite-source effects. We find that the companion has a mass of and it is orbiting a solar-type primary star with a mass of . The estimated projected separation between the lens components is 9.63 1.33 au and the distance to the lens is 4.84 0.67 kpc. 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| subjects | Astrophysics ASTROPHYSICS, COSMOLOGY AND ASTRONOMY binaries: general Brown dwarf stars brown dwarfs Companion stars DETECTION DISTANCE DWARF STARS Gravitation GRAVITATIONAL FIELDS GRAVITATIONAL LENSES gravitational lensing: micro Lenses MASS Microlenses Parallax SPACE Space telescopes |
| title | OGLE-2014-BLG-1112LB: A Microlensing Brown Dwarf Detected through the Channel of a Gravitational Binary-lens Event |
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