16493
收藏DataCite Commons2023-04-21 更新2025-04-15 收录
下载链接:
http://esdcdoi.esac.esa.int/doi/html/data/astronomy/hst/16493.html
下载链接
链接失效反馈官方服务:
资源简介:
AbstractdoublePoint We propose a HST near-IR + SOFIA far-IR study of NGC 2071 comma a system of at least two outflows from a small group of intermediate to low luminosity stars. Protostellar outflows are ubiquitous part of the star formation process. They provide a record of variable accretion onto stars comma have significant impact on the surrounding molecular cloud comma and may disrupt or trigger star formation in molecular clouds. Intermediate-luminosity (30 < Lbol < 1000 solar luminosities) protostars bridge the gap between low- and high-mass star formation comma forming stars with masses between 2 and 10 solar masses (Di Francesco et al. 1997 Mannings and Sargent 2000). Outflows from these systems of protostars have a significant impact on the surrounding ISM comma may play an important role in cloud evolution comma and are an important laboratory for understanding the origin of far-IR line emission from outflows. In this study comma WFC3-IR images of CORCHETE_OPENFeIICORCHETE_CLOSE and Paschen Beta lines will trace J-type shocks in the near-IR. Proper motions of knots will be derived from a 2009 WFC3-IR image. SOFIA 4GREAT will trace emission from far-IR transitions of CORCHETE_OPENOICORCHETE_CLOSE and four additional CO transitions tracing shock heated gas. These lines will provide both radial velocities of the shocked emission as well as measurements of the mass flow and heating by shocks and UV radiation. The combined data will provide 3D space motions of the knots of shock accelerated gas where the outflow is interacting with the surrounding molecular cloud. Additionally comma shock velocities and mass and energy momentum flows through the shocks will provide one of the most detailed measurements of the feedback from a system of protostars to date.
提供机构:
European Space Agency
创建时间:
2023-04-21



