Discovery of the benchmark metal-poor T8 dwarf BD +01° 2920B
We have searched the Wide-field Infrared Survey Explorer first data release for widely separated (≤10 000 au) late T dwarf companions to Hipparcos and Gliese stars. We have discovered a new binary system containing a K-band suppressed T8p dwarf WISEP J142320.86+011638.1 and the mildly metal poor ([F...
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| Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2012-05, Vol.422 (3), p.1922-1932 |
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| creator | Pinfield, D. J. Burningham, B. Lodieu, N. Leggett, S. K. Tinney, C. G. van Spaandonk, L. Marocco, F. Smart, R. Gomes, J. Smith, L. Lucas, P. W. Day-Jones, A. C. Murray, D. N. Katsiyannis, A. C. Catalan, S. Cardoso, C. Clarke, J. R. A. Folkes, S. Gálvez-Ortiz, M. C. Homeier, D. Jenkins, J. S. Jones, H. R. A. Zhang, Z. H. |
| description | We have searched the Wide-field Infrared Survey Explorer first data release for widely separated (≤10 000 au) late T dwarf companions to Hipparcos and Gliese stars. We have discovered a new binary system containing a K-band suppressed T8p dwarf WISEP J142320.86+011638.1 and the mildly metal poor ([Fe/H] =−0.38 ± 0.06) primary BD +01° 2920 (HIP 70319), a G1 dwarf at a distance of 17.2 pc. This new benchmark has T
eff= 680 ± 55 K and a mass of 20-50M
Jup. Its spectral properties are well modelled except for known discrepancies in the Y and K bands. Based on the well-determined metallicity of its companion, the properties of BD +01° 2920B imply that the currently known T dwarfs are dominated by young low-mass objects. We also present an accurate proper motion for the T8.5 dwarf WISEP J075003.84+272544.8. |
| doi_str_mv | 10.1111/j.1365-2966.2012.20549.x |
| format | Article |
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eff= 680 ± 55 K and a mass of 20-50M
Jup. Its spectral properties are well modelled except for known discrepancies in the Y and K bands. Based on the well-determined metallicity of its companion, the properties of BD +01° 2920B imply that the currently known T dwarfs are dominated by young low-mass objects. We also present an accurate proper motion for the T8.5 dwarf WISEP J075003.84+272544.8.</description><identifier>ISSN: 0035-8711</identifier><identifier>EISSN: 1365-2966</identifier><identifier>DOI: 10.1111/j.1365-2966.2012.20549.x</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject>Astrophysics ; brown dwarfs ; Dwarf stars ; stars: low‐mass ; surveys</subject><ispartof>Monthly notices of the Royal Astronomical Society, 2012-05, Vol.422 (3), p.1922-1932</ispartof><rights>2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS 2012</rights><rights>2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c5029-9b08c83f8233d617d4c1861177fb5c6b5ffdd05fbb5c70d1b7ea41373e483b143</citedby><cites>FETCH-LOGICAL-c5029-9b08c83f8233d617d4c1861177fb5c6b5ffdd05fbb5c70d1b7ea41373e483b143</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fj.1365-2966.2012.20549.x$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fj.1365-2966.2012.20549.x$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,27901,27902,45550,45551</link.rule.ids></links><search><creatorcontrib>Pinfield, D. J.</creatorcontrib><creatorcontrib>Burningham, B.</creatorcontrib><creatorcontrib>Lodieu, N.</creatorcontrib><creatorcontrib>Leggett, S. K.</creatorcontrib><creatorcontrib>Tinney, C. G.</creatorcontrib><creatorcontrib>van Spaandonk, L.</creatorcontrib><creatorcontrib>Marocco, F.</creatorcontrib><creatorcontrib>Smart, R.</creatorcontrib><creatorcontrib>Gomes, J.</creatorcontrib><creatorcontrib>Smith, L.</creatorcontrib><creatorcontrib>Lucas, P. W.</creatorcontrib><creatorcontrib>Day-Jones, A. C.</creatorcontrib><creatorcontrib>Murray, D. N.</creatorcontrib><creatorcontrib>Katsiyannis, A. C.</creatorcontrib><creatorcontrib>Catalan, S.</creatorcontrib><creatorcontrib>Cardoso, C.</creatorcontrib><creatorcontrib>Clarke, J. R. A.</creatorcontrib><creatorcontrib>Folkes, S.</creatorcontrib><creatorcontrib>Gálvez-Ortiz, M. C.</creatorcontrib><creatorcontrib>Homeier, D.</creatorcontrib><creatorcontrib>Jenkins, J. S.</creatorcontrib><creatorcontrib>Jones, H. R. A.</creatorcontrib><creatorcontrib>Zhang, Z. H.</creatorcontrib><title>Discovery of the benchmark metal-poor T8 dwarf BD +01° 2920B</title><title>Monthly notices of the Royal Astronomical Society</title><addtitle>Monthly Notices of the Royal Astronomical Society</addtitle><description>We have searched the Wide-field Infrared Survey Explorer first data release for widely separated (≤10 000 au) late T dwarf companions to Hipparcos and Gliese stars. We have discovered a new binary system containing a K-band suppressed T8p dwarf WISEP J142320.86+011638.1 and the mildly metal poor ([Fe/H] =−0.38 ± 0.06) primary BD +01° 2920 (HIP 70319), a G1 dwarf at a distance of 17.2 pc. This new benchmark has T
eff= 680 ± 55 K and a mass of 20-50M
Jup. Its spectral properties are well modelled except for known discrepancies in the Y and K bands. Based on the well-determined metallicity of its companion, the properties of BD +01° 2920B imply that the currently known T dwarfs are dominated by young low-mass objects. We also present an accurate proper motion for the T8.5 dwarf WISEP J075003.84+272544.8.</description><subject>Astrophysics</subject><subject>brown dwarfs</subject><subject>Dwarf stars</subject><subject>stars: low‐mass</subject><subject>surveys</subject><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqNkNtKAzEQhoMoWKvvEPBSdp1J9pC9ULCtJ6gKUq_DHhLatW3WbGu7b-Uz-GRmu-KNCOYimTD__w_zEUIRfHTnvPSRR6HHkijyGSBzVxgk_naP9H4a-6QHwENPxIiH5KiuSwAIOIt65GI0q3PzrmxDjaarqaKZWubTRWpf6UKt0rlXGWPpRNBik1pNByN6Bvj5QVnCYHBMDnQ6r9XJ99snLzfXk-GdN366vR9ejb08BJZ4SQYiF1wLxnkRYVwEOYoIMY51FuZRFmpdFBDqzP1iKDCLVRogj7kKBM8w4H1y2uVW1rytVb2SpVnbpRspERATgQiJU4lOlVtT11ZpWdmZ26RxItnCkqVsmciWiWxhyR0suXXWy866mc1V82-ffHh83pUugHcBZl39Yfd-j_0Cqzx8Dw</recordid><startdate>201205</startdate><enddate>201205</enddate><creator>Pinfield, D. 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H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Discovery of the benchmark metal-poor T8 dwarf BD +01° 2920B</atitle><jtitle>Monthly notices of the Royal Astronomical Society</jtitle><stitle>Monthly Notices of the Royal Astronomical Society</stitle><date>2012-05</date><risdate>2012</risdate><volume>422</volume><issue>3</issue><spage>1922</spage><epage>1932</epage><pages>1922-1932</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><abstract>We have searched the Wide-field Infrared Survey Explorer first data release for widely separated (≤10 000 au) late T dwarf companions to Hipparcos and Gliese stars. We have discovered a new binary system containing a K-band suppressed T8p dwarf WISEP J142320.86+011638.1 and the mildly metal poor ([Fe/H] =−0.38 ± 0.06) primary BD +01° 2920 (HIP 70319), a G1 dwarf at a distance of 17.2 pc. This new benchmark has T
eff= 680 ± 55 K and a mass of 20-50M
Jup. Its spectral properties are well modelled except for known discrepancies in the Y and K bands. Based on the well-determined metallicity of its companion, the properties of BD +01° 2920B imply that the currently known T dwarfs are dominated by young low-mass objects. We also present an accurate proper motion for the T8.5 dwarf WISEP J075003.84+272544.8.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1111/j.1365-2966.2012.20549.x</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Astrophysics brown dwarfs Dwarf stars stars: low‐mass surveys |
| title | Discovery of the benchmark metal-poor T8 dwarf BD +01° 2920B |
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