A METHANE IMAGING SURVEY FOR T DWARF CANDIDATES IN {rho} OPHIUCHI
We report on the results of the first deep, wide-field, near-infrared methane imaging survey of the {rho} Ophiuchi cloud core to search for T dwarfs. Among the 6587 objects detected, 22 were identified as T dwarf candidates. Brown dwarf models indicate that at the age and distance of the {rho} Ophiu...
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| Veröffentlicht in: | Astrophysical journal. Letters 2010-08, Vol.719 (1) |
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| creator | Haisch, Karl E. Barsony, Mary Tinney, Chris |
| description | We report on the results of the first deep, wide-field, near-infrared methane imaging survey of the {rho} Ophiuchi cloud core to search for T dwarfs. Among the 6587 objects detected, 22 were identified as T dwarf candidates. Brown dwarf models indicate that at the age and distance of the {rho} Ophiuchi cloud, these T dwarf candidates have masses between 1 and 2 Jupiter masses. If confirmed as genuine T dwarfs, these objects would be the youngest, lowest mass, and lowest gravity free-floating objects ever directly observed. The existence of these candidates suggests that the initial mass function of the {rho} Ophiuchi cloud extends well into the regime of planetary mass objects. A large fraction (59% {+-} 16%) of our T dwarf candidates appear to be surrounded by circumstellar disks, and thus represents the lowest mass objects yet found to harbor circumstellar disks. |
| doi_str_mv | 10.1088/2041-8205/719/1/L90 |
| format | Article |
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Letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Haisch, Karl E.</au><au>Barsony, Mary</au><au>Tinney, Chris</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A METHANE IMAGING SURVEY FOR T DWARF CANDIDATES IN {rho} OPHIUCHI</atitle><jtitle>Astrophysical journal. Letters</jtitle><date>2010-08-10</date><risdate>2010</risdate><volume>719</volume><issue>1</issue><issn>2041-8205</issn><eissn>2041-8213</eissn><abstract>We report on the results of the first deep, wide-field, near-infrared methane imaging survey of the {rho} Ophiuchi cloud core to search for T dwarfs. Among the 6587 objects detected, 22 were identified as T dwarf candidates. Brown dwarf models indicate that at the age and distance of the {rho} Ophiuchi cloud, these T dwarf candidates have masses between 1 and 2 Jupiter masses. If confirmed as genuine T dwarfs, these objects would be the youngest, lowest mass, and lowest gravity free-floating objects ever directly observed. The existence of these candidates suggests that the initial mass function of the {rho} Ophiuchi cloud extends well into the regime of planetary mass objects. A large fraction (59% {+-} 16%) of our T dwarf candidates appear to be surrounded by circumstellar disks, and thus represents the lowest mass objects yet found to harbor circumstellar disks.</abstract><cop>United States</cop><doi>10.1088/2041-8205/719/1/L90</doi></addata></record> |
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| subjects | ALKANES ASTROPHYSICS, COSMOLOGY AND ASTRONOMY GRAVITATION HYDROCARBONS JUPITER PLANET MASS METHANE ORGANIC COMPOUNDS PLANETS STARS |
| title | A METHANE IMAGING SURVEY FOR T DWARF CANDIDATES IN {rho} OPHIUCHI |
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