A Novel Survey for Young Substellar Objects with the W-band Filter. II. The Coolest and Lowest Mass Members of the Serpens-South Star-forming Region
Given its relative proximity (∼430 pc), compact size (M4 and are the coolest and lowest mass candidate members yet identified in Serpens-South.
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| Veröffentlicht in: | The Astrophysical journal 2020-04, Vol.892 (2), p.122 |
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| creator | Jose, Jessy Biller, Beth A. Albert, Loïc Dubber, Sophie Allers, Katelyn Herczeg, Gregory J. Liu, Michael C. Pearson, Samuel Lalchand, Bhavana Chen, Wen-Ping Bonnefoy, Mickaël Artigau, Etienne Delorme, Philippe Chiang, Po-shih Zhang, Zhoujian Oasa, Yumiko |
| description | Given its relative proximity (∼430 pc), compact size (M4 and are the coolest and lowest mass candidate members yet identified in Serpens-South. |
| doi_str_mv | 10.3847/1538-4357/ab74dd |
| format | Article |
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The Coolest and Lowest Mass Members of the Serpens-South Star-forming Region</title><source>IOP Publishing Free Content</source><creator>Jose, Jessy ; Biller, Beth A. ; Albert, Loïc ; Dubber, Sophie ; Allers, Katelyn ; Herczeg, Gregory J. ; Liu, Michael C. ; Pearson, Samuel ; Lalchand, Bhavana ; Chen, Wen-Ping ; Bonnefoy, Mickaël ; Artigau, Etienne ; Delorme, Philippe ; Chiang, Po-shih ; Zhang, Zhoujian ; Oasa, Yumiko</creator><creatorcontrib>Jose, Jessy ; Biller, Beth A. ; Albert, Loïc ; Dubber, Sophie ; Allers, Katelyn ; Herczeg, Gregory J. ; Liu, Michael C. ; Pearson, Samuel ; Lalchand, Bhavana ; Chen, Wen-Ping ; Bonnefoy, Mickaël ; Artigau, Etienne ; Delorme, Philippe ; Chiang, Po-shih ; Zhang, Zhoujian ; Oasa, Yumiko</creatorcontrib><description>Given its relative proximity (∼430 pc), compact size (<20′), young age (∼0.5 Myr), and rich number of young stellar objects, the Serpens-South star-forming region is a promising site for studying young substellar objects, yet the low-mass members of this region remain largely undiscovered. In this article we report on a deep photometric survey using a custom 1.45 m filter (W band), as well as standard J and H near-IR filters, in order to identify candidate low-mass young brown dwarfs in the Serpens-South region. We constructed a reddening-insensitive index (Q) by combining J, H and W-band photometry for survey objects, in order to identify candidate low-mass members of Serpens based on the strength of the water-absorption feature at 1.45 m in the atmospheres of mid-M and later objects. We then conducted spectroscopic follow-up to confirm youth and spectral type for our candidates. This is the first survey to identify the very low-mass and coolest members of Serpens-South. We identify four low-mass candidate Serpens members, which all display IR excess emission, indicating the likely presence of circumstellar disks around them. One of the four candidate low-mass members in our list, SERP182918-020245, exhibits Paβ and Brγ emission features, confirming its youth and ongoing magnetospheric accretion. Our new candidate members have spectral types >M4 and are the coolest and lowest mass candidate members yet identified in Serpens-South.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.3847/1538-4357/ab74dd</identifier><language>eng</language><publisher>Philadelphia: The American Astronomical Society</publisher><subject>Accretion disks ; Astrophysics ; Brown dwarfs ; Deposition ; Infrared excess ; Low mass stars ; M subdwarf stars ; Magnetospheres ; Near infrared radiation ; Photometry ; Physics ; Polls & surveys ; Pre-main sequence stars ; Solar and Stellar Astrophysics ; Space telescopes ; Star formation ; Stars & galaxies ; Stellar age ; Young stellar objects ; Youth</subject><ispartof>The Astrophysical journal, 2020-04, Vol.892 (2), p.122</ispartof><rights>2020. The American Astronomical Society. 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II. The Coolest and Lowest Mass Members of the Serpens-South Star-forming Region</title><title>The Astrophysical journal</title><addtitle>APJ</addtitle><addtitle>Astrophys. J</addtitle><description>Given its relative proximity (∼430 pc), compact size (<20′), young age (∼0.5 Myr), and rich number of young stellar objects, the Serpens-South star-forming region is a promising site for studying young substellar objects, yet the low-mass members of this region remain largely undiscovered. In this article we report on a deep photometric survey using a custom 1.45 m filter (W band), as well as standard J and H near-IR filters, in order to identify candidate low-mass young brown dwarfs in the Serpens-South region. We constructed a reddening-insensitive index (Q) by combining J, H and W-band photometry for survey objects, in order to identify candidate low-mass members of Serpens based on the strength of the water-absorption feature at 1.45 m in the atmospheres of mid-M and later objects. We then conducted spectroscopic follow-up to confirm youth and spectral type for our candidates. This is the first survey to identify the very low-mass and coolest members of Serpens-South. We identify four low-mass candidate Serpens members, which all display IR excess emission, indicating the likely presence of circumstellar disks around them. One of the four candidate low-mass members in our list, SERP182918-020245, exhibits Paβ and Brγ emission features, confirming its youth and ongoing magnetospheric accretion. Our new candidate members have spectral types >M4 and are the coolest and lowest mass candidate members yet identified in Serpens-South.</description><subject>Accretion disks</subject><subject>Astrophysics</subject><subject>Brown dwarfs</subject><subject>Deposition</subject><subject>Infrared excess</subject><subject>Low mass stars</subject><subject>M subdwarf stars</subject><subject>Magnetospheres</subject><subject>Near infrared radiation</subject><subject>Photometry</subject><subject>Physics</subject><subject>Polls & surveys</subject><subject>Pre-main sequence stars</subject><subject>Solar and Stellar Astrophysics</subject><subject>Space telescopes</subject><subject>Star formation</subject><subject>Stars & galaxies</subject><subject>Stellar age</subject><subject>Young stellar objects</subject><subject>Youth</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp1kc1PwyAYxonRxPlx90hiPJjYjQIt9LgsfiypmjiNeiJ0UNelKxXamf0f_sFSa-ZFT8DD733eFx4ATkI0JJyyURgRHlASsZHMGFVqBwy20i4YIIRoEBP2sg8OnFt2R5wkA_A5hndmrUs4a-1ab2BuLHw1bfXmhcw1uiylhffZUs8bBz-KZgGbhYbPQSYrBa-KstF2CKfTIXz08sSYUrsGdnep-ei2t9I5eKtXmbYOmvy7eqZtrSsXzEzr_WaNtIFvuyp80wf9VpjqCOzlsnT6-Gc9BE9Xl4-TmyC9v55OxmkwpyFtghhTxbWWjIVcyYSpjGLEJcOIqEgqhBVniMosi2KK_Z-QkNMIM0aIJxJJySE4730XshS1LVbSboSRhbgZp6LTEEE0wTFZh5497dnamvfWP00sTWsrP57AhMdJTKOko1BPza1xzup8axsi0eUkulBEF4roc_IlZ31JYepfT1kvBU-wwCLEWNQq99zFH9y_tl-2H59V</recordid><startdate>20200401</startdate><enddate>20200401</enddate><creator>Jose, Jessy</creator><creator>Biller, Beth A.</creator><creator>Albert, Loïc</creator><creator>Dubber, Sophie</creator><creator>Allers, Katelyn</creator><creator>Herczeg, Gregory J.</creator><creator>Liu, Michael C.</creator><creator>Pearson, Samuel</creator><creator>Lalchand, Bhavana</creator><creator>Chen, Wen-Ping</creator><creator>Bonnefoy, Mickaël</creator><creator>Artigau, Etienne</creator><creator>Delorme, Philippe</creator><creator>Chiang, Po-shih</creator><creator>Zhang, Zhoujian</creator><creator>Oasa, Yumiko</creator><general>The American Astronomical Society</general><general>IOP Publishing</general><general>American Astronomical Society</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><scope>1XC</scope><scope>VOOES</scope><orcidid>https://orcid.org/0000-0003-0262-272X</orcidid><orcidid>https://orcid.org/0000-0003-0580-7244</orcidid><orcidid>https://orcid.org/0000-0003-3506-5667</orcidid><orcidid>https://orcid.org/0000-0001-7249-6787</orcidid><orcidid>https://orcid.org/0000-0002-7154-6065</orcidid><orcidid>https://orcid.org/0000-0002-3726-4881</orcidid><orcidid>https://orcid.org/0000-0003-0475-9375</orcidid><orcidid>https://orcid.org/0000-0003-4614-7035</orcidid><orcidid>https://orcid.org/0000-0003-4908-4404</orcidid><orcidid>https://orcid.org/0000-0003-3167-2523</orcidid><orcidid>https://orcid.org/0000-0003-2232-7664</orcidid><orcidid>https://orcid.org/0000-0002-2279-410X</orcidid><orcidid>https://orcid.org/0000-0003-0241-8956</orcidid><orcidid>https://orcid.org/0000-0002-4663-2025</orcidid><orcidid>https://orcid.org/0000-0001-5579-5339</orcidid></search><sort><creationdate>20200401</creationdate><title>A Novel Survey for Young Substellar Objects with the W-band Filter. 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The Coolest and Lowest Mass Members of the Serpens-South Star-forming Region</title><author>Jose, Jessy ; Biller, Beth A. ; Albert, Loïc ; Dubber, Sophie ; Allers, Katelyn ; Herczeg, Gregory J. ; Liu, Michael C. ; Pearson, Samuel ; Lalchand, Bhavana ; Chen, Wen-Ping ; Bonnefoy, Mickaël ; Artigau, Etienne ; Delorme, Philippe ; Chiang, Po-shih ; Zhang, Zhoujian ; Oasa, Yumiko</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c414t-624d8eea7718da97db4208a7203d5ad02d8704abb564274d31845277332039a43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Accretion disks</topic><topic>Astrophysics</topic><topic>Brown dwarfs</topic><topic>Deposition</topic><topic>Infrared excess</topic><topic>Low mass stars</topic><topic>M subdwarf stars</topic><topic>Magnetospheres</topic><topic>Near infrared radiation</topic><topic>Photometry</topic><topic>Physics</topic><topic>Polls & surveys</topic><topic>Pre-main sequence stars</topic><topic>Solar and Stellar Astrophysics</topic><topic>Space telescopes</topic><topic>Star formation</topic><topic>Stars & galaxies</topic><topic>Stellar age</topic><topic>Young stellar objects</topic><topic>Youth</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jose, Jessy</creatorcontrib><creatorcontrib>Biller, Beth A.</creatorcontrib><creatorcontrib>Albert, Loïc</creatorcontrib><creatorcontrib>Dubber, Sophie</creatorcontrib><creatorcontrib>Allers, Katelyn</creatorcontrib><creatorcontrib>Herczeg, Gregory J.</creatorcontrib><creatorcontrib>Liu, Michael C.</creatorcontrib><creatorcontrib>Pearson, Samuel</creatorcontrib><creatorcontrib>Lalchand, Bhavana</creatorcontrib><creatorcontrib>Chen, Wen-Ping</creatorcontrib><creatorcontrib>Bonnefoy, Mickaël</creatorcontrib><creatorcontrib>Artigau, Etienne</creatorcontrib><creatorcontrib>Delorme, Philippe</creatorcontrib><creatorcontrib>Chiang, Po-shih</creatorcontrib><creatorcontrib>Zhang, Zhoujian</creatorcontrib><creatorcontrib>Oasa, Yumiko</creatorcontrib><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 Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Jose, Jessy</au><au>Biller, Beth A.</au><au>Albert, Loïc</au><au>Dubber, Sophie</au><au>Allers, Katelyn</au><au>Herczeg, Gregory J.</au><au>Liu, Michael C.</au><au>Pearson, Samuel</au><au>Lalchand, Bhavana</au><au>Chen, Wen-Ping</au><au>Bonnefoy, Mickaël</au><au>Artigau, Etienne</au><au>Delorme, Philippe</au><au>Chiang, Po-shih</au><au>Zhang, Zhoujian</au><au>Oasa, Yumiko</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A Novel Survey for Young Substellar Objects with the W-band Filter. II. The Coolest and Lowest Mass Members of the Serpens-South Star-forming Region</atitle><jtitle>The Astrophysical journal</jtitle><stitle>APJ</stitle><addtitle>Astrophys. J</addtitle><date>2020-04-01</date><risdate>2020</risdate><volume>892</volume><issue>2</issue><spage>122</spage><pages>122-</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><abstract>Given its relative proximity (∼430 pc), compact size (<20′), young age (∼0.5 Myr), and rich number of young stellar objects, the Serpens-South star-forming region is a promising site for studying young substellar objects, yet the low-mass members of this region remain largely undiscovered. In this article we report on a deep photometric survey using a custom 1.45 m filter (W band), as well as standard J and H near-IR filters, in order to identify candidate low-mass young brown dwarfs in the Serpens-South region. We constructed a reddening-insensitive index (Q) by combining J, H and W-band photometry for survey objects, in order to identify candidate low-mass members of Serpens based on the strength of the water-absorption feature at 1.45 m in the atmospheres of mid-M and later objects. We then conducted spectroscopic follow-up to confirm youth and spectral type for our candidates. This is the first survey to identify the very low-mass and coolest members of Serpens-South. We identify four low-mass candidate Serpens members, which all display IR excess emission, indicating the likely presence of circumstellar disks around them. One of the four candidate low-mass members in our list, SERP182918-020245, exhibits Paβ and Brγ emission features, confirming its youth and ongoing magnetospheric accretion. 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| ispartof | The Astrophysical journal, 2020-04, Vol.892 (2), p.122 |
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| language | eng |
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| source | IOP Publishing Free Content |
| subjects | Accretion disks Astrophysics Brown dwarfs Deposition Infrared excess Low mass stars M subdwarf stars Magnetospheres Near infrared radiation Photometry Physics Polls & surveys Pre-main sequence stars Solar and Stellar Astrophysics Space telescopes Star formation Stars & galaxies Stellar age Young stellar objects Youth |
| title | A Novel Survey for Young Substellar Objects with the W-band Filter. II. The Coolest and Lowest Mass Members of the Serpens-South Star-forming Region |
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