Recently, the Milky Way Imaging  Scroll Painting (MWISP) group of Purple Mountain Observatory (PMO)  reported the molecular structures of spiral arms in the Galactic Region  of l=[140,150]°, b=[-5,5]°which is in the Camelopardalis. The result  will soon be published in “The Astrophysical Journal Supplement Series”. 

  At the Camelopardalis and its  surroundings successively locate the Local arm, the Perseus arm, the  Outer arm and the Scutum - Centaurus arm. Among them, the gas structures  of Outer arm (Du et al. 2016) and Scutum - Centaurus arm (Sun et al.  2015) have already been studied and published using the MWISP survey  data. This time, taking advantage of the 96-square-degree data which is  in the Camelopardalis Region, the MWISP group mapped the molecular  structure of Local arm and Perseus in this region (as shown in Figure  1). Combining HI data and part of the previous Outer arm results, we  obtain that the warp structure of both atom and molecular gas is  obvious, while the flare structure only presents in atom gas in this  observing region. Besides, five filamentary giant molecular clouds on  Perseus arm are identified. Among them, four are newly identified. 

  The on-going MWISP survey is the world most sensitive large-scale unbiased ¹²CO/¹³CO/C¹⁸O  molecular line survey up to now. As one of the target region of the  survey, the Camelopardalis Region was observed through two years. This  is the first time that the MWISP group reports the large-scale mapping  result, and also the first time that the mapping of three CO lines with  high sensitivity in Camelopardalis. 

Figure 1. Molecular gas mapping in Camelopardalis.  The upper left and lower left panels show Local arm molecular gas at  different distances; The upper right panel shows the molecular gas on  the Perseus arm; The lower right panel shows the whole. The blue, green  and red color indicate the ¹²CO, ¹³CO and C¹⁸O, respectively.Paper link：https://arxiv.org/abs/1702.00544