BANYAN. II. VERY LOW MASS AND SUBSTELLAR CANDIDATE MEMBERS TO NEARBY, YOUNG KINEMATIC GROUPS WITH PREVIOUSLY KNOWN SIGNS OF YOUTH
We present Bayesian Analysis for Nearby Young AssociatioNs II (BANYAN II), a modified Bayesian analysis for assessing the membership of later-than-M5 objects to any of several Nearby Young Associations (NYAs). In addition to using kinematic information (from sky position and proper motion), this ana...
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| Veröffentlicht in: | The Astrophysical journal 2014-03, Vol.783 (2), p.1-35 |
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| container_title | The Astrophysical journal |
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| creator | Gagne, Jonathan Lafreniere, David Doyon, Rene Malo, Lison ARTIGAU, ETIENNE |
| description | We present Bayesian Analysis for Nearby Young AssociatioNs II (BANYAN II), a modified Bayesian analysis for assessing the membership of later-than-M5 objects to any of several Nearby Young Associations (NYAs). In addition to using kinematic information (from sky position and proper motion), this analysis exploits 2MASS-WISE color-magnitude diagrams in which old and young objects follow distinct sequences. We find that Bayesian probabilities are generally representative of contamination rates, except when a parallax measurement is considered. In this case contamination rates become significantly smaller and hence Bayesian probabilities for NYA memberships are pessimistic. We apply this new algorithm to a sample of 158 objects from the literature that are either known to display spectroscopic signs of youth or have unusually red near-infrared colors for their spectral type. Based on our analysis, we identify 25 objects as new highly probable candidates to NYAs, including a new M7.5 bona fide member to Tucana-Horologium, making it the latest-type member. |
| doi_str_mv | 10.1088/0004-637X/783/2/121 |
| format | Article |
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II. VERY LOW MASS AND SUBSTELLAR CANDIDATE MEMBERS TO NEARBY, YOUNG KINEMATIC GROUPS WITH PREVIOUSLY KNOWN SIGNS OF YOUTH</title><source>IOP Publishing Free Content</source><source>Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals</source><source>Alma/SFX Local Collection</source><creator>Gagne, Jonathan ; Lafreniere, David ; Doyon, Rene ; Malo, Lison ; ARTIGAU, ETIENNE</creator><creatorcontrib>Gagne, Jonathan ; Lafreniere, David ; Doyon, Rene ; Malo, Lison ; ARTIGAU, ETIENNE</creatorcontrib><description>We present Bayesian Analysis for Nearby Young AssociatioNs II (BANYAN II), a modified Bayesian analysis for assessing the membership of later-than-M5 objects to any of several Nearby Young Associations (NYAs). In addition to using kinematic information (from sky position and proper motion), this analysis exploits 2MASS-WISE color-magnitude diagrams in which old and young objects follow distinct sequences. We find that Bayesian probabilities are generally representative of contamination rates, except when a parallax measurement is considered. In this case contamination rates become significantly smaller and hence Bayesian probabilities for NYA memberships are pessimistic. We apply this new algorithm to a sample of 158 objects from the literature that are either known to display spectroscopic signs of youth or have unusually red near-infrared colors for their spectral type. 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II. VERY LOW MASS AND SUBSTELLAR CANDIDATE MEMBERS TO NEARBY, YOUNG KINEMATIC GROUPS WITH PREVIOUSLY KNOWN SIGNS OF YOUTH</title><title>The Astrophysical journal</title><description>We present Bayesian Analysis for Nearby Young AssociatioNs II (BANYAN II), a modified Bayesian analysis for assessing the membership of later-than-M5 objects to any of several Nearby Young Associations (NYAs). In addition to using kinematic information (from sky position and proper motion), this analysis exploits 2MASS-WISE color-magnitude diagrams in which old and young objects follow distinct sequences. We find that Bayesian probabilities are generally representative of contamination rates, except when a parallax measurement is considered. In this case contamination rates become significantly smaller and hence Bayesian probabilities for NYA memberships are pessimistic. We apply this new algorithm to a sample of 158 objects from the literature that are either known to display spectroscopic signs of youth or have unusually red near-infrared colors for their spectral type. Based on our analysis, we identify 25 objects as new highly probable candidates to NYAs, including a new M7.5 bona fide member to Tucana-Horologium, making it the latest-type member.</description><subject>ALGORITHMS</subject><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>Bayesian analysis</subject><subject>COLOR</subject><subject>Contamination</subject><subject>DATA ANALYSIS</subject><subject>DISTRIBUTION</subject><subject>Kinematics</subject><subject>MASS</subject><subject>Parallax</subject><subject>PROBABILITY</subject><subject>PROPER MOTION</subject><subject>SKY</subject><subject>Spectra</subject><subject>STARS</subject><subject>Youth</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqN0b-P0zAUwHELgUQ5-AtYLLEwkNY_ktge056vtS51TnFyJZMVXEcU9Zojzg2M_OckKmJmenrS573lC8BHjJYYcb5CCMVRStnXFeN0RVaY4FdggRPKo5gm7DVY_BNvwbsQfswrEWIBfq8z3WR6CZVawkdZNjAvDnCfGQMzfQtNvTaVzPOshJtpV7dZJeFe7teyNLAqoJZZuW6-wKao9RbeKy33WaU2cFsW9YOBB1Xt4EMpH1VRm7yB97o4aGjUVhtY3M1X1e49eNO15-A__J03oL6T1WYX5cVWbbI8cpTzMRIIszZJMab82AkmaNJ5T13K0ySORcISxAnrUHp0jrNvhFEqUCtIehRiUhO9AZ-uf_swnmxwp9G7766_XLwbLSE0wUlMJvX5qp6H_ueLD6N9OgXnz-f24vuXYDHDXBCMGfoPinAsCMdsovRK3dCHMPjOPg-np3b4ZTGyc0E7B7FzHzsVtMROBekf3oqBVA</recordid><startdate>20140310</startdate><enddate>20140310</enddate><creator>Gagne, Jonathan</creator><creator>Lafreniere, David</creator><creator>Doyon, Rene</creator><creator>Malo, Lison</creator><creator>ARTIGAU, ETIENNE</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>KL.</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>20140310</creationdate><title>BANYAN. II. VERY LOW MASS AND SUBSTELLAR CANDIDATE MEMBERS TO NEARBY, YOUNG KINEMATIC GROUPS WITH PREVIOUSLY KNOWN SIGNS OF YOUTH</title><author>Gagne, Jonathan ; Lafreniere, David ; Doyon, Rene ; Malo, Lison ; ARTIGAU, ETIENNE</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c388t-9017a561138df97935fee3c68654495750827f06dcc87b273390a926d993c6ee3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>ALGORITHMS</topic><topic>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</topic><topic>Bayesian analysis</topic><topic>COLOR</topic><topic>Contamination</topic><topic>DATA ANALYSIS</topic><topic>DISTRIBUTION</topic><topic>Kinematics</topic><topic>MASS</topic><topic>Parallax</topic><topic>PROBABILITY</topic><topic>PROPER MOTION</topic><topic>SKY</topic><topic>Spectra</topic><topic>STARS</topic><topic>Youth</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gagne, Jonathan</creatorcontrib><creatorcontrib>Lafreniere, David</creatorcontrib><creatorcontrib>Doyon, Rene</creatorcontrib><creatorcontrib>Malo, Lison</creatorcontrib><creatorcontrib>ARTIGAU, ETIENNE</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gagne, Jonathan</au><au>Lafreniere, David</au><au>Doyon, Rene</au><au>Malo, Lison</au><au>ARTIGAU, ETIENNE</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>BANYAN. II. VERY LOW MASS AND SUBSTELLAR CANDIDATE MEMBERS TO NEARBY, YOUNG KINEMATIC GROUPS WITH PREVIOUSLY KNOWN SIGNS OF YOUTH</atitle><jtitle>The Astrophysical journal</jtitle><date>2014-03-10</date><risdate>2014</risdate><volume>783</volume><issue>2</issue><spage>1</spage><epage>35</epage><pages>1-35</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><abstract>We present Bayesian Analysis for Nearby Young AssociatioNs II (BANYAN II), a modified Bayesian analysis for assessing the membership of later-than-M5 objects to any of several Nearby Young Associations (NYAs). In addition to using kinematic information (from sky position and proper motion), this analysis exploits 2MASS-WISE color-magnitude diagrams in which old and young objects follow distinct sequences. We find that Bayesian probabilities are generally representative of contamination rates, except when a parallax measurement is considered. In this case contamination rates become significantly smaller and hence Bayesian probabilities for NYA memberships are pessimistic. We apply this new algorithm to a sample of 158 objects from the literature that are either known to display spectroscopic signs of youth or have unusually red near-infrared colors for their spectral type. Based on our analysis, we identify 25 objects as new highly probable candidates to NYAs, including a new M7.5 bona fide member to Tucana-Horologium, making it the latest-type member.</abstract><cop>United States</cop><doi>10.1088/0004-637X/783/2/121</doi><tpages>35</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | The Astrophysical journal, 2014-03, Vol.783 (2), p.1-35 |
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| language | eng |
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| source | IOP Publishing Free Content; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection |
| subjects | ALGORITHMS ASTROPHYSICS, COSMOLOGY AND ASTRONOMY Bayesian analysis COLOR Contamination DATA ANALYSIS DISTRIBUTION Kinematics MASS Parallax PROBABILITY PROPER MOTION SKY Spectra STARS Youth |
| title | BANYAN. II. VERY LOW MASS AND SUBSTELLAR CANDIDATE MEMBERS TO NEARBY, YOUNG KINEMATIC GROUPS WITH PREVIOUSLY KNOWN SIGNS OF YOUTH |
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