Back to Volume
Paper: Spectral Line Survey Toward the Energetic HVCC CO 0.02–0.02
Volume: 528, New Horizons in Galactic Center Astronomy and Beyond
Page: 89
Authors: Nakagawara, R.; Oka, T.; Iwata, Y.; Tsujimoto, S.; Roll, J. A.; Kanno, S.; Uruno, A.; Yokozuka, H.; Watanabe, Y.; Takekawa, S.
Abstract: CO 0.02–0.02 is a famous high-velocity compact cloud located about 5 arcminutes Galactic east of Sgr A*. To unveil the nature and origin of CO 0.02–0.02, we performed a 3 mm band spectral line survey using the Nobeyama Radio Observatory 45 m telescope. As a result, 64 lines from 39 molecules were detected. We carefully examined the observed line shapes, and found that HC3N, SiO, CH3OH, SO, and H2CS are the superior probes for CO 0.02–0.02. This indicates that compression and heating processes by shocks have dominated the chemistry of this cloud. Comparing relative line intensities at the highest velocity component with those at the highest column density position, it was found that the highest velocity component is less affected by strong shocks. This supports the scenario that the object has been accelerated by a less violent process such as a gravitational kick.
Back to Volume