PROJECT-J: JWST Observations of HH46 IRS and Its Outflow. Overview and First Results

Author:

Nisini BrunellaORCID,Navarro Maria GabrielaORCID,Giannini TeresaORCID,Antoniucci SimoneORCID,Kavanagh Patrick, J.ORCID,Hartigan PatrickORCID,Bacciotti FrancescaORCID,Caratti o Garatti AlessioORCID,Noriega-Crespo AlbertoORCID,van Dishoeck Ewine F.ORCID,Whelan Emma T.ORCID,Arce Hector G.ORCID,Cabrit SylvieORCID,Coffey DeirdreORCID,Fedele DavideORCID,Eislöffel JochenORCID,Palumbo Maria ElisabettaORCID,Podio LindaORCID,Ray Tom P.ORCID,Schultze Megan,Urso Riccardo G.ORCID,Alcalá Juan M.ORCID,Bautista Manuel A.ORCID,Codella ClaudioORCID,Greene Thomas P.ORCID,Manara Carlo F.ORCID

Abstract

Abstract We present the first results of the JWST program PROJECT-J (PROtostellar JEts Cradle Tested with JWST), designed to study the Class I source HH46 IRS and its outflow through NIRSpec and MIRI spectroscopy (1.66–28 μm). The data provide line images (∼6.″6 in length with NIRSpec, and up to ∼20″ with MIRI) revealing unprecedented details within the jet, the molecular outflow, and the cavity. We detect, for the first time, the redshifted jet within ∼90 au from the source. Dozens of shock-excited forbidden lines are observed, including highly ionized species such as [Ne iii] 15.5 μm, suggesting that the gas is excited by high velocity (>80 km s−1) shocks in a relatively high-density medium. Images of H2 lines at different excitations outline a complex molecular flow, where a bright cavity, molecular shells, and a jet-driven bow shock interact with and are shaped by the ambient conditions. Additional NIRCam 2 μm images resolve the HH46 IRS ∼110 au binary system and suggest that the large asymmetries observed between the jet and the H2 wide-angle emission could be due to two separate outflows being driven by the two sources. The spectra of the unresolved binary show deep ice bands and plenty of gaseous lines in absorption, likely originating in a cold envelope or disk. In conclusion, JWST has unraveled for the first time the origin of the HH46 IRS complex outflow demonstrating its capability to investigate embedded regions around young stars, which remain elusive even at near-IR wavelengths.

Funder

Istituto Nazionale di Astrofisica

Ministero dell'Università e della Ricerca

Space Telescope Science Institute

Publisher

American Astronomical Society

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3