JWST observations of 13CO2 ice: Tracing the chemical environment and thermal history of ices in protostellar envelopes
The structure and composition of simple ices can be severely modified during stellar evolution by protostellar heating. Key to understanding the involved processes are thermal and chemical tracers that can be used to diagnose the history and environment of the ice. The 15.2 µm bending mode of 12CO2...
| Autores: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/369954 |
| Acceso en línea: | http://hdl.handle.net/10261/369954 |
| Access Level: | acceso abierto |
| Palabra clave: | Astrochemistry Techniques: spectroscopic Stars: protostars ISM: molecules |
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JWST observations of 13CO2 ice: Tracing the chemical environment and thermal history of ices in protostellar envelopes |
| title |
JWST observations of 13CO2 ice: Tracing the chemical environment and thermal history of ices in protostellar envelopes |
| spellingShingle |
JWST observations of 13CO2 ice: Tracing the chemical environment and thermal history of ices in protostellar envelopes Brunken, Nashanty G. C. Astrochemistry Techniques: spectroscopic Stars: protostars ISM: molecules |
| title_short |
JWST observations of 13CO2 ice: Tracing the chemical environment and thermal history of ices in protostellar envelopes |
| title_full |
JWST observations of 13CO2 ice: Tracing the chemical environment and thermal history of ices in protostellar envelopes |
| title_fullStr |
JWST observations of 13CO2 ice: Tracing the chemical environment and thermal history of ices in protostellar envelopes |
| title_full_unstemmed |
JWST observations of 13CO2 ice: Tracing the chemical environment and thermal history of ices in protostellar envelopes |
| title_sort |
JWST observations of 13CO2 ice: Tracing the chemical environment and thermal history of ices in protostellar envelopes |
| dc.creator.none.fl_str_mv |
Brunken, Nashanty G. C. Rocha, Will R. M. van Dishoeck, Ewine F. Gutermuth, Robert Tyagi, Himanshu Slavicinska, Katerina Nazari, Pooneh Megeath, S. Thomas Evans, Neal J., II Narang, Mayank Manoj, P. Rubinstein, Adam E. Watson, Dan M. Looney, Leslie W. Linnartz, Harold Caratti o Garatti, Alessio Beuther, Henrik Linz, Hendrik Klaassen, Pamela Poteet, Charles A. Federman, Samuel Anglada Pons, Guillem Josep Atnagulov, Prabhani Bourke, Tyler L. Fischer, William J. Furlan, Elise Green, Joel Habel, Nolan Hartmann, Lee Karnath, Nicole Osorio, Mayra Muzerolle Page, James Pokhrel, Riwaj Rahatgaonkar, Rohan Sheehan, Patrick Stanke, Thomas Stutz, Amelia M. Tobin, John J. Tychoniec, Lukasz Wolk, Scott Yang, Yao-Lun |
| author |
Brunken, Nashanty G. C. |
| author_facet |
Brunken, Nashanty G. C. Rocha, Will R. M. van Dishoeck, Ewine F. Gutermuth, Robert Tyagi, Himanshu Slavicinska, Katerina Nazari, Pooneh Megeath, S. Thomas Evans, Neal J., II Narang, Mayank Manoj, P. Rubinstein, Adam E. Watson, Dan M. Looney, Leslie W. Linnartz, Harold Caratti o Garatti, Alessio Beuther, Henrik Linz, Hendrik Klaassen, Pamela Poteet, Charles A. Federman, Samuel Anglada Pons, Guillem Josep Atnagulov, Prabhani Bourke, Tyler L. Fischer, William J. Furlan, Elise Green, Joel Habel, Nolan Hartmann, Lee Karnath, Nicole Osorio, Mayra Muzerolle Page, James Pokhrel, Riwaj Rahatgaonkar, Rohan Sheehan, Patrick Stanke, Thomas Stutz, Amelia M. Tobin, John J. Tychoniec, Lukasz Wolk, Scott Yang, Yao-Lun |
| author_role |
author |
| author2 |
Rocha, Will R. M. van Dishoeck, Ewine F. Gutermuth, Robert Tyagi, Himanshu Slavicinska, Katerina Nazari, Pooneh Megeath, S. Thomas Evans, Neal J., II Narang, Mayank Manoj, P. Rubinstein, Adam E. Watson, Dan M. Looney, Leslie W. Linnartz, Harold Caratti o Garatti, Alessio Beuther, Henrik Linz, Hendrik Klaassen, Pamela Poteet, Charles A. Federman, Samuel Anglada Pons, Guillem Josep Atnagulov, Prabhani Bourke, Tyler L. Fischer, William J. Furlan, Elise Green, Joel Habel, Nolan Hartmann, Lee Karnath, Nicole Osorio, Mayra Muzerolle Page, James Pokhrel, Riwaj Rahatgaonkar, Rohan Sheehan, Patrick Stanke, Thomas Stutz, Amelia M. Tobin, John J. Tychoniec, Lukasz Wolk, Scott Yang, Yao-Lun |
| author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Ministerio de Ciencia e Innovación (España) European Commission European Research Council Dutch Research Council Fondo Nacional de Desarrollo Científico y Tecnológico (Chile) Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Astrochemistry Techniques: spectroscopic Stars: protostars ISM: molecules |
| topic |
Astrochemistry Techniques: spectroscopic Stars: protostars ISM: molecules |
| description |
The structure and composition of simple ices can be severely modified during stellar evolution by protostellar heating. Key to understanding the involved processes are thermal and chemical tracers that can be used to diagnose the history and environment of the ice. The 15.2 µm bending mode of 12CO2 in particular has proven to be a valuable tracer of ice heating events but suffers from grain shape and size effects. A viable alternative tracer is the weaker 13CO2 isotopologue band at 4.39 µm, which has now become accessible at high S/N with the James Webb Space Telescope (JWST). In this study, we present JWST NIRSpec observations of 13CO2 ice in five deeply embedded Class 0 sources that span a wide range in masses and luminosities (0.2–104 L⊙) taken as part of the Investigating Protostellar Accretion Across the Mass Spectrum (IPA) program. The band profiles vary significantly depending on the source, with the most luminous sources showing a distinct narrow peak at 4.38 µm. We first applied a phenomenological approach with which we demonstrate that a minimum of three to four Gaussian profiles are needed to fit the absorption feature of 13CO2. We then combined these findings with laboratory data and show that a 15.2 µm 12CO2 bending-mode-inspired five-component decomposition can be applied to the isotopologue band, with each component representative of CO2 ice in a specific molecular environment. The final solution consists of cold mixtures of CO2 with CH3OH, H2O, and CO as well as segregated heated pure CO2 ice at 80 K. Our results are in agreement with previous studies of the 12CO2 ice band, further confirming that 13CO2 is a useful alternative tracer of protostellar heating and ice composition. We also propose an alternative solution consisting only of heated mixtures of CO2:CH3OH and CO2:H2O ices and warm pure CO2 ice at 80 K (i.e., no cold CO2 ices) for decomposing the ice profiles of HOPS 370 and IRAS 20126, the two most luminous sources in our sample that show strong evidence of ice heating resulting in ice segregation. © The Authors 2024. |
| publishDate |
2024 |
| dc.date.none.fl_str_mv |
2024 2024 2024 |
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info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Publisher's version info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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http://hdl.handle.net/10261/369954 |
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http://hdl.handle.net/10261/369954 |
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Inglés |
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Inglés |
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EDP Sciences |
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JWST observations of 13CO2 ice: Tracing the chemical environment and thermal history of ices in protostellar envelopesBrunken, Nashanty G. C.Rocha, Will R. M.van Dishoeck, Ewine F.Gutermuth, RobertTyagi, HimanshuSlavicinska, KaterinaNazari, PoonehMegeath, S. ThomasEvans, Neal J., IINarang, MayankManoj, P.Rubinstein, Adam E.Watson, Dan M.Looney, Leslie W.Linnartz, HaroldCaratti o Garatti, AlessioBeuther, HenrikLinz, HendrikKlaassen, PamelaPoteet, Charles A.Federman, SamuelAnglada Pons, Guillem JosepAtnagulov, PrabhaniBourke, Tyler L.Fischer, William J.Furlan, EliseGreen, JoelHabel, NolanHartmann, LeeKarnath, NicoleOsorio, MayraMuzerolle Page, JamesPokhrel, RiwajRahatgaonkar, RohanSheehan, PatrickStanke, ThomasStutz, Amelia M.Tobin, John J.Tychoniec, LukaszWolk, ScottYang, Yao-LunAstrochemistryTechniques: spectroscopicStars: protostarsISM: moleculesThe structure and composition of simple ices can be severely modified during stellar evolution by protostellar heating. Key to understanding the involved processes are thermal and chemical tracers that can be used to diagnose the history and environment of the ice. The 15.2 µm bending mode of 12CO2 in particular has proven to be a valuable tracer of ice heating events but suffers from grain shape and size effects. A viable alternative tracer is the weaker 13CO2 isotopologue band at 4.39 µm, which has now become accessible at high S/N with the James Webb Space Telescope (JWST). In this study, we present JWST NIRSpec observations of 13CO2 ice in five deeply embedded Class 0 sources that span a wide range in masses and luminosities (0.2–104 L⊙) taken as part of the Investigating Protostellar Accretion Across the Mass Spectrum (IPA) program. The band profiles vary significantly depending on the source, with the most luminous sources showing a distinct narrow peak at 4.38 µm. We first applied a phenomenological approach with which we demonstrate that a minimum of three to four Gaussian profiles are needed to fit the absorption feature of 13CO2. We then combined these findings with laboratory data and show that a 15.2 µm 12CO2 bending-mode-inspired five-component decomposition can be applied to the isotopologue band, with each component representative of CO2 ice in a specific molecular environment. The final solution consists of cold mixtures of CO2 with CH3OH, H2O, and CO as well as segregated heated pure CO2 ice at 80 K. Our results are in agreement with previous studies of the 12CO2 ice band, further confirming that 13CO2 is a useful alternative tracer of protostellar heating and ice composition. We also propose an alternative solution consisting only of heated mixtures of CO2:CH3OH and CO2:H2O ices and warm pure CO2 ice at 80 K (i.e., no cold CO2 ices) for decomposing the ice profiles of HOPS 370 and IRAS 20126, the two most luminous sources in our sample that show strong evidence of ice heating resulting in ice segregation. © The Authors 2024.Astrochemistry in Leiden is supported by The Netherlands Research School for Astronomy (NOVA), by funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No. 101019751 MOLDISK), and by the Dutch Research Council (NWO) grant 618.000.001. Support by the Danish National Research Foundation through the Center of Excellence “InterCat” (Grant agreement no.: DNRF150) is also acknowledged. This work is based on observations made with the NASA/ESA/CSA James Webb Space Telescope. The data were obtained from the Mikulski Archive for Space Telescopes at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127 for JWST. These observations are associated with program #1802. All the JWST data used in this paper can be found in MAST: http://dx.doi.org/10.17909/3kky-t040. Support for S.F., A.E.R., S.T.M., R.G., W.F., J.G., J.J.T. and D.W. in program #1802 was provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127. A.C.G. acknowledges from PRIN-MUR 2022 20228JPA3A “The path to star and planet formation in the JWST era (PATH)” and by INAF-GoG 2022 “NIR-dark Accretion Outbursts in Massive Young stellar objects (NAOMY)” and Large Grant INAF 2022 “YSOs Outflows, Disks and Accretion: towards a global framework for the evolution of planet forming systems (YODA)”. N.J.E. thanks the University of Texas at Austin for research support. A.S. gratefully acknowledges support by the Fondecyt Regular (project code 1220610), and ANID BASAL project FB210003. G.A. and M.O. acknowledge financial support from grants PID2020-114461GB-I00 and CEX2021-001131-S, funded by MCIN/AEI/10.13039/501100011033.With funding from the Spanish government through the "Severo Ochoa Centre of Excellence" accreditation (CEX2021-001131-S).Peer reviewedEDP SciencesMinisterio de Ciencia e Innovación (España)European CommissionEuropean Research CouncilDutch Research CouncilFondo Nacional de Desarrollo Científico y Tecnológico (Chile)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202420242024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/369954reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/H2020/101019751info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-114461GB-I00info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/CEX2021-001131-Shttp://dx.doi.org/10.1051/0004-6361/202348718Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3699542026-05-22T06:33:51Z |
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