2017 Fiscal Year Research-status Report
Disentangling the Molecular Gas Properties of the Nuclear Disk/Torus in Powerful Radio Galaxies with ALMA
| Project/Area Number |
17K14254
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| Research Institution | National Astronomical Observatory of Japan |
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Principal Investigator |
エスパダ ダニエル 国立天文台, チリ観測所, 特任准教授 (20784086)
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| Project Period (FY) |
2017-04-01 – 2019-03-31
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| Keywords | galaxies / AGN / GMCs |
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| Outline of Annual Research Achievements |
Two papers were published during the reporting period, -Espada et al. 2017,ApJ 843, 136. Using ALMA data we revealed that the circumnuclear disk is composed of an inner molecular ring, nuclear shocks, and we imaged the interface between CO and the warm H2.-McCoy et al. 2017,ApJ 851, 76M. We study the chemical and physical properties of the circumnuclear disk. Three oral contributions showing work related to this KAKENHI program were performed in 2017: 1) International conference "Role of Gas in Galaxy Dynamics", Malta, Oct 2-6, 2) ASJ meeting 11- 13 Sept, Sapporo. 3) East Asia AGN workshop 4 Dec, Kagoshima.
Another related work on a similar elliptical galaxy hosting a radio source, NGC3557 (Vila-Vilaro, Espada, et al.), was submitted to ApJ and we are waiting response from the referee.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The ALMA dataset was reduced and analyzed as expected. The data quality was found to be excellent. The publication that we had planned for this financial year was finally published (Espada et al. 2017,ApJ 843, 136). In addition, we have published an additional work related to this KAKENHI program (McCoy et al. 2017,ApJ 851, 76M). Also, as expected these works have been presented in both international and domestic conferences and workshops.
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| Strategy for Future Research Activity |
In the near future we will publish our study on physical properties of the Giant Molecular Clouds in NGC5128 as a function of galacto-centric radii. For that we are producing a census of the Giant Molecular Clouds of Centaurus A using our existing ALMA data.
Preliminar results were already presented in the East Asia AGN workshop (2017 4-6 December) in a poster contribution (Miura et al.).
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| Causes of Carryover |
130,765円 is carried over to the next fiscal year. The reason was that travel costs were cheaper than initially planned. This will be used to support the costs planned for next fiscal year, i.e. conferences and equipment.
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