Large-Scale Distribution of Herbig-H

Large-Scale Distribution of Herbig-Haro Objects in Taurus

We report our new results on Herbig-Haro (HH) objects in the star forming region of Taurus from a wide-field survey with the 60/90 cm Schmidt telescope of the Beijing Astronomical Observatory. This survey using CCD imaging with a narrow band [SⅡ] filter and an intermediate band [BATC10] filter covered approximately 30 square degrees in Taurus. Besides confirming the known HH Objects in the region, we discovered seven new HH candidates, and groups. Six of these are HH 701A-B, HH 702A-D, HH 703, HH 704A-D, HH 705, HH 706 and the seventh is a group, a new component of HH 319, labeled HH 319B-D. Based on the large-scale distribution of pre-main-sequence (PMS) stars in Taurus, we analyze statistically the most probable distance from the HH objects to each PMS star,from which we estimate the typical timescale of these HH objects to be between(1.3 - 2.0) × 104 yrs; and we also obtain the birth rates of HH objects: 0.447±0.198 for Class Ⅰ PMS stars, 0.360±0.222 for Class Ⅱ PMS stars, and -0.148±0.234 for Class Ⅲ PMS stars.

作 者： Ke-Feng Sun Ji Yang Shao-Guang Luo Min Wang Li-Cai Deng Xu Zhou Jian-Sheng Chen   作者单位： Ke-Feng Sun(Department of Astronomy, Peking University, Beijing 100871;Chinese Academy of Sciences-Peking University Joint Beijing Astrophysical Center, Beijing 100871;Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008)

Ji Yang,Min Wang(Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008;National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012)

Shao-Guang Luo(Department of Astronomy, Peking University, Beijing 100871;Chinese Academy of Sciences-Peking University Joint Beijing Astrophysical Center, Beijing 100871)

Li-Cai Deng,Xu Zhou,Jian-Sheng Chen(Chinese Academy of Sciences-Peking University Joint Beijing Astrophysical Center, Beijing 100871;National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012) 

刊 名： 天体物理学报(英文版)  ISTIC SCI 英文刊名： CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS  年，卷(期)： 2003 3(5)  分类号： P14  关键词： ISM: Herbig-Haro objects - ISM: individual (Taurus region) ISM: jets and outflows - star: formation - stars: pre-main-sequence  

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