TWO MOLECULAR CLOUDS WITH ANOMALOUS VELOCITIES IN THE GALACTIC ANTICENTER

• Published in: Journal of The Korean Astronomical Society Vol. 47; no. 6; pp. 319 - 325
• Main Authors: Lee, Youngung, Kim, Young Sik, Kim, Hyung-Goo, Jung, Jae-Hoon, Yim, In-Sung, Kang, Hyunwoo, Lee, Changhoon, Kim, Bong-Gyu, Kim, Kwang-Tae
• Format: Journal Article
• Language: English
• Published: 한국천문학회 31.12.2014
• Subjects: 천문학
• ISSN: 1225-4614; 2288-890X
• DOI: 10.5303/JKAS.2014.47.6.319

We map two molecular clouds located in the exact anticenter region emitting in the (J = 1-0)transition of 12CO and 13CO using the 3-mm SIS mixer receiver on the 14-m radio telescope at TaedukRadio Astronomy Observatory. The target clouds with anomalous velocities of VLSR ~20 km s-1 aredistinguished from other clouds in this direction. In addition, they are located in the interarm regionbetween the Orion Arm and the Perseus Arm. Sizes of the clouds are estimated to be about 8.6 and10.8 pc, respectively. The total mass is estimated to be about 4 x 103 M⊙ using CO luminosity of theclouds. Several cores are detected, but no sign of star formation is found according to the IRAS pointsources. Their larger linewidths, anomalous velocities, and their location at the interarm region makethese clouds more distinguished, though their physical properties are similar to the dark clouds in thesolar neighborhood in terms of mass and size. KCI Citation Count: 1