The circumstellar environment of IRAS 05327+3404

E. A. Magnier*, L. B.F.M. Waters, P. J. Groot, M. E. Van Den Ancker, Y. J. Kuan, E. L. Martin

*此作品的通信作者

    研究成果: 雜誌貢獻期刊論文同行評審

    8 引文 斯高帕斯(Scopus)

    摘要

    We continue our study of the young stellar object associated with IRAS 05327+3404. We have determined the spectral type of the central star to be K2. We show that the star is most likely seen directly, not via a reflection, and that the extinction is only Av ∼ 2.3 mag. The spectral energy distribution shows the presence of large amounts of circumstellar material. Near-IR and optical observations of the reflection nebula also demonstrate the presence of circumstellar material, and show the material to be arranged in a disk with a relatively wide central hole of ∼33° opening angle. The central hole and a CO outflow are co-aligned, and are roughly aligned with the ionized outflow. Several surprising aspects remain: Although the system has a strong ionized outflow, there is little or no evidence of active accretion in the form of UV excess, veiling, or strong high-Balmer line emission. Also, the spectral energy distribution is very wide, and suggests that the original birth cloud had a large rotational velocity. We propose that the relative isolation of the system from other star formation activity may explain the relatively large circumstellar disk for a system with a well-exposed central star.

    原文英語
    頁(從 - 到)441-452
    頁數12
    期刊Astronomy and Astrophysics
    346
    發行號2
    出版狀態已發佈 - 1999 十二月 1

    ASJC Scopus subject areas

    • 天文和天體物理學
    • 空間與行星科學

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