A Novel Survey for Young Substellar Objects with the W-band Filter. VII. Water-bearing Objects in the Core of the ρ Ophiuchi Cloud Complex
We present a study of very low mass stars and brown dwarfs in the rich star-forming core of the ρ Ophiuchi cloud complex. The selection of the sample relies on detecting the inherent water absorption characteristic in young substellar objects. Of the 22 water-bearing candidates selected, 15 have a s...
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2025-01-01
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| Online Access: | https://doi.org/10.3847/1538-4357/ada3c3 |
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| author | Tanvi Sharma Wen Ping Chen Beth Biller Loïc Albert Belinda Damian Jessy Jose Bhavana Lalchand Michael C. Liu Yumiko Oasa |
| author_facet | Tanvi Sharma Wen Ping Chen Beth Biller Loïc Albert Belinda Damian Jessy Jose Bhavana Lalchand Michael C. Liu Yumiko Oasa |
| author_sort | Tanvi Sharma |
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| description | We present a study of very low mass stars and brown dwarfs in the rich star-forming core of the ρ Ophiuchi cloud complex. The selection of the sample relies on detecting the inherent water absorption characteristic in young substellar objects. Of the 22 water-bearing candidates selected, 15 have a spectral type of M6 or later. Brown dwarf candidates too faint for membership determination by Gaia have their proper motions derived by deep-infrared images spanning 6 yr. Astrometric analysis confirms 21/22 sources as members, with one identified as a contaminant. Infrared colors and the spectral energy distribution of each water-bearing candidate are used to diagnose the mass, age, and possible existence of circumstellar dust. A total of 15 sources exhibit evidence of disks in their spectral energy distributions, as late as in M8-type objects. Spectroscopy for bright candidates has confirmed one as an M8 member and verified two sources (with disks) exhibiting signatures of magnetospheric accretion. |
| format | Article |
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| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal |
| spelling | doaj-art-2fdbbec7e90c4c61a294347f058de39e2025-08-20T02:13:45ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01980220510.3847/1538-4357/ada3c3A Novel Survey for Young Substellar Objects with the W-band Filter. VII. Water-bearing Objects in the Core of the ρ Ophiuchi Cloud ComplexTanvi Sharma0https://orcid.org/0000-0003-1634-3158Wen Ping Chen1https://orcid.org/0000-0003-0262-272XBeth Biller2https://orcid.org/0000-0003-4614-7035Loïc Albert3https://orcid.org/0000-0003-0475-9375Belinda Damian4https://orcid.org/0000-0002-2234-4678Jessy Jose5https://orcid.org/0000-0003-4908-4404Bhavana Lalchand6https://orcid.org/0000-0003-1618-2921Michael C. Liu7https://orcid.org/0000-0003-2232-7664Yumiko Oasa8https://orcid.org/0000-0001-7249-6787Institute of Astronomy, National Central University , 300 Zhongda Road, Zhongli 32001 Taoyuan, TaiwanInstitute of Astronomy, National Central University , 300 Zhongda Road, Zhongli 32001 Taoyuan, Taiwan; Department of Physics, National Central University , 300 Zhongda Road, Zhongli 32001 Taoyuan, TaiwanInstitute for Astronomy, Royal Observatory, University of Edinburgh , Blackford Hill, Edinburgh EH93HJ, UKInstitut Trottier de recherche sur les exoplanètes, Université de Montréal , Montréal, QC H3C 3J7, Canada; Département de physique, Université de Montréal , Montréal, QC H3C 3J7, CanadaSUPA, School of Physics Astronomy, University of St Andrews , North Haugh, St Andrews, KY16 9SS, UK; Department of Physics and Electronics, CHRIST (Deemed to be University) , Hosur Road, Bengaluru 560029, IndiaDepartment of Physics, Indian Institute of Science Education and Research Tirupati , Yerpedu, Tirupati - 517619, Andhra Pradesh, IndiaInstitute of Astronomy, National Central University , 300 Zhongda Road, Zhongli 32001 Taoyuan, TaiwanInstitute for Astronomy, University of Hawai’i , 2680 Woodlawn Drive, Honolulu, HI 96822, USAFaculty of Education / Graduate School of Science and Engineering, Saitama University 255 , Shimo-Okubo, Sakura, Saitama 338-8570, JapanWe present a study of very low mass stars and brown dwarfs in the rich star-forming core of the ρ Ophiuchi cloud complex. The selection of the sample relies on detecting the inherent water absorption characteristic in young substellar objects. Of the 22 water-bearing candidates selected, 15 have a spectral type of M6 or later. Brown dwarf candidates too faint for membership determination by Gaia have their proper motions derived by deep-infrared images spanning 6 yr. Astrometric analysis confirms 21/22 sources as members, with one identified as a contaminant. Infrared colors and the spectral energy distribution of each water-bearing candidate are used to diagnose the mass, age, and possible existence of circumstellar dust. A total of 15 sources exhibit evidence of disks in their spectral energy distributions, as late as in M8-type objects. Spectroscopy for bright candidates has confirmed one as an M8 member and verified two sources (with disks) exhibiting signatures of magnetospheric accretion.https://doi.org/10.3847/1538-4357/ada3c3Star formationBrown dwarfsCircumstellar disksAccretionYoung stellar objects |
| spellingShingle | Tanvi Sharma Wen Ping Chen Beth Biller Loïc Albert Belinda Damian Jessy Jose Bhavana Lalchand Michael C. Liu Yumiko Oasa A Novel Survey for Young Substellar Objects with the W-band Filter. VII. Water-bearing Objects in the Core of the ρ Ophiuchi Cloud Complex The Astrophysical Journal Star formation Brown dwarfs Circumstellar disks Accretion Young stellar objects |
| title | A Novel Survey for Young Substellar Objects with the W-band Filter. VII. Water-bearing Objects in the Core of the ρ Ophiuchi Cloud Complex |
| title_full | A Novel Survey for Young Substellar Objects with the W-band Filter. VII. Water-bearing Objects in the Core of the ρ Ophiuchi Cloud Complex |
| title_fullStr | A Novel Survey for Young Substellar Objects with the W-band Filter. VII. Water-bearing Objects in the Core of the ρ Ophiuchi Cloud Complex |
| title_full_unstemmed | A Novel Survey for Young Substellar Objects with the W-band Filter. VII. Water-bearing Objects in the Core of the ρ Ophiuchi Cloud Complex |
| title_short | A Novel Survey for Young Substellar Objects with the W-band Filter. VII. Water-bearing Objects in the Core of the ρ Ophiuchi Cloud Complex |
| title_sort | novel survey for young substellar objects with the w band filter vii water bearing objects in the core of the ρ ophiuchi cloud complex |
| topic | Star formation Brown dwarfs Circumstellar disks Accretion Young stellar objects |
| url | https://doi.org/10.3847/1538-4357/ada3c3 |
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