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Statistical Study of High-Velocity Compact Clouds Based on the Complete CO Imagings of the Central Molecular Zone

  • Sekito Tokuyama (a1), Tomoharu Oka (a1), Shunya Takekawa (a1), Masaya Yamada (a1), Yuhei Iwata (a1) and Shiho Tsujimoto (a1)...

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High-velocity compact clouds (HVCCs) is one of the populations of peculiar clouds detected in the Central Molecular Zone (CMZ) of our Galaxy. They have compact appearances (< 5 pc) and large velocity widths (> 50 km s−1). Several explanations for the origin of HVCC were proposed; e.g., a series of supernovae (SN) explosions (Oka et al. 1999) or a gravitational kick by a point-like gravitational source (Oka et al. 2016). To investigate the statistical property of HVCCs, a complete list of them is acutely necessary. However, the previous list is not complete since the identification procedure included automated processes and manual selection (Nagai 2008). Here we developed an automated procedure to identify HVCCs in a spectral line data.

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References

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Oka, T., Glenn, J., Hasegawa, T., Sato, F., Tsuboi, M.,& Miyazaki, A., 1999, ApJ, 249, 255
Oka, T., Hasegawa, T., Sato, F., Tsuboi, M., Miyazaki, A., & Sugimoto, M. 2001b ApJS, 118, 455
Oka, T., Mizuno, R., Miura, K., & Takekawa, S., 2016, ApJL, 816, 5
Nagai, M., 2008 PhD thesis, The University of Tokyo
Sofue, Y., 1995 PASJ, 47, 527
Williams, , de Geus, & Blitz, 1994, ApJ, 428, 693
Solomon, P. M., Rivolo, A. R., Barrett, J., & Yahil, A. 1987, ApJ, 319, 730
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