Deep Searches for Herbig-Haro Objects, in Particular of Two New Types - Giant Bow Shocks and Mini-Jets

深入搜索赫比格-哈罗天体，特别是两种新型天体——巨型弓激波和迷你喷气式天体

• 批准号: 08640333
• 负责人: OGURA Katsuo
• 金额: $ 1.15万
• 依托单位: Kokugakuin University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08640333/
• 关键词: Herbig-Haro Objects; Astrophysical Jets; Shock Waves; Star Formation; Protostars; Interstellar Clouds; Emission Nebulae; Schmidt Observations; ハ-ビック・ハロ-天体

The principal aim of this research project is to make deep searches for Herbig-Haro (HH) objects in selected star-forming regions and hopefully to establish two new categories of HH objects, namely "giant bow shocks" and "mini-jets". The former is a huge shock structure located in front of the main bow shock due to a previous eruption of the HH exciting star. The latter is suspected to emanate from very low-mass, young stellar objects.We have picked up around 700 small red nebulosities as likely HH candidates in the L1641 dark cloud in Orion by comparing deep Schmidt plates in the red and blue. They include four probable giant bow shocks and over a dozen of possible mini-jets. We planned to extend the surveys to the L1630 dark cloud and to the NGC 2264/Mon OB1 region, but could not finish. Also the data reduction of the multi-object fiber spectroscopy for some of the HH candidates in L1641 have not not been completed. These data should clarify how many percent of the above objects are bona fide HHs.In addition to the above, we carried out two studies on more or less related topics. First, a catalog is presented of about 80 scattered, small clouds optically visible in the Orion region. We suspect them to be cloud cores of the giant molecular cloud left over from the main star forming activity and call them "remnant molecular clouds". Second, we analyzed the CO and ^<1S>CO data and discovered a high-velocity molecular outflow associated with the giant HH complex HH 135/136. It is concluded that a jet emanating from the HH exciting source collides with the cloud core and is deflected to show a velocity inversion in HH 136.

这一研究项目的主要目的是在选定的恒星形成区深入搜寻赫比格-哈罗(HH)天体，并有望建立两类新的HH天体，即“巨弓激波”和“迷你喷流”。前者是一个巨大的激波结构，位于主弓激波的前面，这是由于HH激发星之前的一次喷发。后者被怀疑来自非常低质量的年轻恒星对象。我们通过比较深施密特板块的红色和蓝色，发现了大约700个小的红色星云，可能是猎户座L1641暗星云中的HH候选星云。它们包括四个可能的巨大弓形激波和十几个可能的迷你喷气式飞机。我们计划将调查范围扩大到L1630暗云和NGC 2264/MON OB1区域，但未能完成。此外，L1641中一些HH候选的多目标光纤光谱学的数据缩减还没有完成。这些数据应该可以澄清上述对象中有多少是真正的HH。此外，我们还就或多或少相关的主题进行了两项研究。首先，给出了猎户座区域大约80个分散的、光学上可见的小云的星表。我们怀疑它们是主恒星形成活动遗留下来的巨型分子云的云核，并将其称为“残留分子云”。其次，我们分析了CO和^&lt；1s&gt；CO数据，发现了与巨型HH复合体HH 135/136相关的高速分子外流。结果表明，从HH激发源发出的急流与云核相撞，并在HH 136处发生偏转，表现为速度反转。

项目成果

K.Sugitani, K.Morita, M.Nakano, M.Tamura and K.Ogura: "Interferometric ^<13>CO Observations of the Cometary Bright-Rimmed Cloud 37 in IC 1396 : Evidence for Collapse phase of Radiation Driven Implosio〓" Astrophysical Journal (Letters). 486. L141-L144 (199

K.Sugitani、K.Morita、M.Nakano、M.Tamura 和 K.Ogura：“IC 1396 中彗星亮边云 37 的干涉测量 ^<13>CO 观测：辐射驱动内爆崩塌阶段的证据〓”天体物理学杂志（快报）486。L141-L144（199）。

K.Ogura, M.Nakano, K.Sugitani & T.Liljestrom: "Carbon Monoxicide Observations of the HH135/136 Complex" Astronomy and Astropysics. (submitted). (1998)

K.Ogura、M.Nakano、K.Sugitani

K.Ogura and K.Sugitani: "Remnant Molecular Clouds in the Ori OBI Association" Publications of the Astronomical Society of Australia. 15(印刷中). (1998)

K.Ogura 和 K.Sugitani：“Ori OBI 协会中的残余分子云”，澳大利亚天文学会出版物 15（出版中）。

K.Ogura, H.Nakano, K.Sugitani and T.Liljestrom: "Carbon Monoxide Observations of the HH135/136 Complex" Astronomy and Astrophysics. (投稿中).

K.Ogura、H.Nakano、K.Sugitani 和 T.Liljestrom：“HH135/136 复合体的一氧化碳观测”天文学和天体物理学（提交中）。

K.Ogura, M.Nakano, K.Sugitani and T.Liljestrom: "SEST Observations of the HH135/136 Complex" Low Mass Star Formation-from Infall to Outfolw. 166-168 (1997)

K.Ogura、M.Nakano、K.Sugitani 和 T.Liljestrom：“HH135/136 复合体的 SEST 观测”低质量恒星形成 - 从坠落到流出。