Line Survey of L1157 B1 Shocked Region

¹ The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
e-mail: takahiro@taurus.phys.s.u-tokyo.ac.jp
² Nobeyama Radio Observatory, Minamimaki, Minamisaku, Nagano 384-1305, Japan
³ Department of Earth and Planetary Sciences, Kobe University, Kobe 657-8501, Japan
⁴ Academia Sinica, Institute of Astronomoy and Astrophysics, PO Box 23-141, Taipei, 106, Taiwan
⁵ Department of Astronomy, Kyoto University, Kyoto 606-8502, Japan

Abstract

We present the initial results of a spectral line survey of L1157 B1 with the Nobeyama 45 m telescope. So far, we have covered the frequencey range of 13.7 GHz (82.0–94.5 GHz and 96.3–97.5 GHz), and have detected 22 species including CH₃CHO, HCOOH, HCOOCH₃, HNCO, NH₂CHO, CH₃CN, and CCS. We have also detected the line of CH₂DOH. These results demonstrate rich chemistry in this shocked region, which would mainly originate from evaporation of ice mantles by means of shocks.