Streamers: Funneling Material from Envelopes to the Youngest Planet-forming Disks

流光：将物质从包层输送到最年轻​​的行星形成盘

• 批准号: 2102405
• 负责人: Dominique Segura-Cox
• 金额: $ 30万
• 依托单位: Segura-Cox Dominique M
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-10-01 至 2024-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2102405&HistoricalAwards=false
• 关键词: Streamers; Funneling; Material; Envelopes; Youngest

This award is funded in whole or in part under the American Rescue Plan Act of 2021 (Public Law 117-2). Dominique Segura-Cox is awarded an NSF Astronomy and Astrophysics Postdoctoral Fellowship to conduct a program of research and education at the University of Texas. Segura-Cox will observationally explore the properties of “streamers” – long, thin funnels connecting material between the natal envelopes and disks of young protostars – and compare the observations with simulations of mass accretion in protostars. Results from this study will allow astronomers to understand how material is accreted onto protostars and what role streamers play in the early stages of star and planet formation. For the education component of this project, Segura-Cox will develop an astronomy-themed seminar series for middle school and high school teachers in rural and socioeconomically disadvantaged communities.This project will conduct radio interferometric observations of asymmetric streamers to study their chemical composition, occurrence, and from how far away they accrete material into planet-forming disks. By measuring the chemical composition of the streamers and comparing it to exoplanet compositions, the likelihood of streamer material being directly incorporated into planets will be assessed. Using ongoing surveys, the proportion of protostars with streamers will be systematically determined to assess whether streamers are a common mass-accretion pathway for planet-forming disks. Using follow-up observations, the full extent of streamers from clouds to disks will be determined. Comparing observations with simulations will permit determination of mass infall rates, magnetic field strengths, and streamer chemical evolution with time.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该奖项是根据2021年《美国救援计划法》（公法117-2）全部或部分资助的。 Dominique Segura-Cox被授予NSF天文学和天体物理学博士后研究金，以在德克萨斯大学进行研究和教育计划。 Segura-Cox将观察到“流媒体”的性质 - 长而薄的漏斗，将材料连接到幼年的信封和年轻质体的磁盘之间 - 并将观察结果与原始质量增生的模拟进行比较。这项研究的结果将使天文学家能够了解如何接受材料到质恒星上的材料以及彩带在恒星和行星形成的早期阶段中扮演的角色。对于该项目的教育部分，Segura-Cox将为中学和高中教师开发以天文学为主题的半段系列系列，该系列在艰难和社会经济上处于弱势社区的社区。该项目将对不对称流媒体进行无线电干涉测量，以研究其化学成分，发生以及距离它们将材料的远距离增加到行星形成磁盘中。通过测量流媒体的化学组成并将其与系外星的组成进行比较，将评估直接掺入行星的流媒体材料的可能性。使用正在进行的调查，将系统地确定原静脉与流媒体的比例，以评估流媒体是否是构成行星磁盘的常见质量 - 核心途径。使用后续观察，将确定云到磁盘的流式元素的全部范围。将观察结果与模拟进行比较将允许确定质量中心率，磁场强度和流媒体化学演化与时间。该奖项反映了NSF的法定任务，并通过使用基金会的知识分子优点和更广泛的影响来评估，被认为是宝贵的支持。

项目成果

An Interferometric View of H-MM1. I. Direct Observation of NH 3 Depletion

H-MM1 的干涉视图。

• DOI: 10.3847/1538-3881/ac6be7
• 发表时间: 2022
• 期刊: The Astronomical Journal
• 作者: Pineda, Jaime E.;Harju, Jorma;Caselli, Paola;Sipilä, Olli;Juvela, Mika;Vastel, Charlotte;Rosolowsky, Erik;Burkert, Andreas;Friesen, Rachel K.;Shirley, Yancy
• 通讯作者: Shirley, Yancy

PRODIGE – envelope to disk with NOEMA: I. A 3000 au streamer feeding a Class I protostar

PRODIGE — 使用 NOEMA 将信封传输至磁盘：I. 一条 3000 au 的流光为 I 级原恒星供电

• DOI: 10.1051/0004-6361/202243310
• 发表时间: 2022
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: Valdivia-Mena, M. T.;Pineda, J. E.;Segura-Cox, D. M.;Caselli, P.;Neri, R.;López-Sepulcre, A.;Cunningham, N.;Bouscasse, L.;Semenov, D.;Henning, Th.
• 通讯作者: Henning, Th.

Dust Hot Spots at 10 au Scales around the Class 0 Binary IRAS 16293–2422 A: A Departure from the Passive Irradiation Model

• DOI: 10.3847/2041-8213/aca53a
• 发表时间: 2022-12
• 期刊: The Astrophysical Journal Letters
• 作者: M. Maureira;M. Gong;J. Pineda;H. Liu;Kedron Silsbee;P. Caselli;J. Zamponi;D. Segura-Cox;A. Schmiedeke

PRODIGE – envelope to disk with NOEMA: II. Small-scale temperature structure and streamer feeding the SVS13A protobinary based on CH 3 CN and DCN

PRODIGE — 使用 NOEMA 信封到磁盘：II。

• DOI: 10.1051/0004-6361/202244183
• 发表时间: 2023
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: Hsieh, T.-H.;Segura-Cox, D. M.;Pineda, J. E.;Caselli, P.;Bouscasse, L.;Neri, R.;Lopez-Sepulcre, A.;Valdivia-Mena, M. T.;Maureira, M. J.;Henning, Th.
• 通讯作者: Henning, Th.

SOLIS: XVI. Mass ejection and time variability in protostellar outflows: Cep E

索利斯：十六。

• DOI: 10.1051/0004-6361/202142931
• 发表时间: 2022
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: de A. Schutzer, A.;Rivera-Ortiz, P. R.;Lefloch, B.;Gusdorf, A.;Favre, C.;Segura-Cox, D.;López-Sepulcre, A.;Neri, R.;Ospina-Zamudio, J.;De Simone, M.
• 通讯作者: De Simone, M.