2009 Fiscal Year Final Research Report
Accurate distance measurements with VERA of nearby molecular clouds
| Project/Area Number |
20740112
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Astronomy
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| Research Institution | National Astronomical Observatory of Japan |
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Principal Investigator |
HIROTA Tomoya National Astronomical Observatory of Japan, 水沢VLBI観測所, 助教 (10325764)
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| Project Period (FY) |
2008 – 2009
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| Keywords | 電波天文学 / 位置天文学 / 銀河天文学 / 星形成 / 原始星 / 星間分子雲 / VLBI / メーザー |
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| Research Abstract |
We have carried out astrometic observations of H_2O maser sources associated with nearby molecular clouds with VERA. The aim of this project is to measure the accurate distances to molecular clouds within 1 kpc (3260 ly) from the Sun, and to reveal their 3 dimensional structures. It is also useful to refine physics and dynamics in star-formation processes. Thanks to accurate astrometry capability of VERA, we have succeeded in measuring trigonometric annual parallaxes of molecular clouds in the Cepheus (2490 ly) and Perseus (750 ly) regions.
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