Title:Near-infrared observations of a triggered star forming region BRC13
Author(s):Miyuki Hayashi, Yoichi Itoh, Takahiro Niwa, Yumiko Oasa, Kengo Tachihara
Abstract:
We investigate star formation activities triggered by UV radiation from a massive star.
The triggered mode of star formations has been confirmed in several massive-star forming regions, such as the Orion Molecular Cloud. It is also considered that this mode occurs in Bright Rimmed Clouds (BRCs).
The W5E HII region associates several BRCs, such as BRC13 and BRC14. The previous radio and optical observations suggested that the triggered star formation occurs in this HII region. Moreover, in the vicinity of BRC14, near infrared (NIR) observations showed that the star formation propagates from the outside of the bright rim to the inside of the molecular cloud. However, young stellar objects (YSOs) associated with BRC13 have not yet been investigated.
In this study, we have carried out a deep NIR observation of BRC13 at Okayama Astrophysical Observatory. We identified 1 class I (protostar) candidate and 11 class II (CTTS) candidates. Most of them are located in the molecular cloud. The mass of the each object is estimated to be 0.1 to 1 solar mass, assuming its age of 1 million years. We will discuss mode of star formation in this cloud.