Molecular Lines of CO Isotopes of the High Galactic Latitude Cloud HSVMT27
| Autor: | Qing-Zeng Yan, Ji Yang, Deng-Rong Lu, Ye Xu, Zhi-hong He, Xinyu Du, Fa-Cheng Li |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Ursa Major 010308 nuclear & particles physics Star formation Thermodynamic equilibrium Infrared Resolution (electron density) Astronomy and Astrophysics Excitation temperature Astrophysics 01 natural sciences Virial theorem Latitude Space and Planetary Science 0103 physical sciences 010303 astronomy & astrophysics |
| Zdroj: | Chinese Astronomy and Astrophysics. 42:188-201 |
| ISSN: | 0275-1062 |
| DOI: | 10.1016/j.chinastron.2018.04.002 |
| Popis: | A study on the CO 12 , CO 13 , and C18O lines of the high Galactic latitude cloud HSVMT 27, located in Ursa Major, was conducted. A relatively low CO 12 excitation temperature was found. While some C18O emissions were detected, they were too weak to be mapped. With the spatial resolution of 0.08 pc and the velocity resolution of 0.17 km·s−1, 26 CO 13 cores were identified in the dense regions. All the local thermodynamic equilibrium masses of these cores are less than their Virial masses, ranging in 0.5–10 M⊙, and have no infrared point sources associated with them. Overall, the data indicate that there is no recent or ongoing star formation in this cloud. |
| Databáze: | OpenAIRE |
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