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Maser astrometry with VERA and Galactic structure

  • Mareki Honma (a1) (a2), Takumi Nagayama (a1), Tomoya Hirota (a1) (a2), Naoko Matsumoto (a1), Nobuyuki Sakai (a1) (a2) and Noriyuki Kawaguchi (a1) (a2)...
Abstract
Abstract

Since 2007 VERA (VLBI Exploration of Radio Astrometry) has been producing astrometric results (distances and/or proper motions) for Galactic maser sources. Nearly 30 parallaxes have been obtained for star-forming regions and late-type stars. By using VERA's astrometric results for star-forming regions, combined with those obtained with VLBA and EVN, fundamental Galactic parameters and Galactic structure may be derived. Our results show that R0 = 8.4 ± 0.4 kpc and Ω ≡ Ω0 + V/R0=30.7±0.8 km s−1 kpc−1, and also show that the rotation curve of the Galaxy is nearly flat. The determinations of Galactic parameters and structures demonstrate that the maser astrometry can not only contribute significantly to research of individual maser sources, but also to studies of the structure of the Galaxy.

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This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

Dame 2001 ApJ, 547, 792

Dehnen & Binney 1998, MNRAS, 298, 387

A. Ghez , 2008, ApJ, 689, 1044

S. Gillessen 2009, ApJ, 692, 1075

T. Hirota 2011b, ApJL, 739, L59

M. Honma 2000, Proceedings of SPIE, 4015, 624

Morimoto 1985 ApJ, 288, L11

Motogi, 2011, MNRAS, 417, 238

M. Reid 2009, ApJ, 693, 397

Schönrich 2010, MNRAS, 403, 1829

Y. Sofue , V. Rubin 2001, ARA&A, 39, 137

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Proceedings of the International Astronomical Union
  • ISSN: 1743-9213
  • EISSN: 1743-9221
  • URL: /core/journals/proceedings-of-the-international-astronomical-union
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