The z distribution of hydrogen clouds and masers with kinematic distances

详细信息    查看全文

• 作者：V. V. Bobylev ; A. T. Bajkova
• 关键词：hydrogen clouds ; HII regions ; methanol masers ; Sun’s height above Galactic plane ; vertical disk scale height ; Galactic structure
• 刊名：Astronomy Letters
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：42
• 期：3
• 页码：182-192
• 全文大小：1,185 KB
• 参考文献：1.V. V. Bobylev, Astrophysics 57, 583 (2014).ADS
  2.V. V. Bobylev and A. T. Bajkova, Astron. Lett. 40, 783 (2014a).ADS CrossRef
  3.V. V. Bobylev and A. T. Bajkova, Mon. Not. R. Astron. Soc. 437, 1549 (2014b).ADS CrossRef
  4.V. V. Bobylev and A. T. Bajkova, Mon. Not. R. Astron. Soc. 447, L50 (2015).ADS CrossRef
  5.V. V. Bobylev et al., Astron. Lett. 42, 1 (2016).ADS CrossRef
  6.L. Bronfman, S. Casassus, J. May, and L. -A°. Nyman, Astron. Astrophys. 358, 521 (2000).ADS
  7.A. S. M. Buckner and D. Froebrich, Mon. Not. R. Astron. Soc. 444, 290 (2014).ADS CrossRef
  8.Y. K. Choi, K. Hachisuka, M. J. Reid, Y. Xu, A. Brunthaler, K. M. Menten, and T. M. Dame, Astrophys. J. 790, 99 (2014).ADS CrossRef
  9.P. S. Conti and W. D. Vacca, Astron. J. 100, 431 (1990).ADS CrossRef
  10.F. Elias, J. Cabrero-Cano, and E. J. Alfaro, Astron. J. 131, 2700 (2006).ADS CrossRef
  11.V. L. Fish, M. J. Reid, and D. J. Wilner, Astrophys. J. 587, 701 (2003).ADS CrossRef
  12.K. Hachisuka, Y. K. Choi, M. J. Reid, A. Brunthaler, K. M. Menten, A. Sanna, and T. M. Dame, Astrophys. J. 800, 2 (2015).ADS CrossRef
  13.L. G. Hou and J. L. Han, Astron. Astrophys. 569, 125 (2014).ADS CrossRef
  14.R. M. Humphreys and J. A. Larsen, Astron. J. 110, 2183 (1995).ADS CrossRef
  15.Y. C. Joshi, Mon. Not. R. Astron. Soc. 378, 768 (2007).ADS CrossRef
  16.J. Maiz-Apellániz, Astron. J. 121, 2737 (2001).
  17.D. J. Marshall, A. C. Robin, C. Reyle, M. Schultheis, and S. Picaud, Astron. Astrophys. 453, 635 (2006).ADS CrossRef
  18.R. Paladini, R. D. Davies, and G. De Zotti, Mon. Not. R. Astron. Soc. 347, 237 (2004).ADS CrossRef
  19.J. D. Pandian, K. M. Menten, and P. F. Goldsmith, Astrophys. J. 706, 1609 (2009).ADS CrossRef
  20.A. E. Piskunov, N. V. Kharchenko, S. Röser, E. Schilbach, and R.-D. Scholz, Astron. Astrophys. 445, 545 (2006).ADS CrossRef
  21.B. C. Reed, Astron. J. 120, 314 (2000).ADS CrossRef
  22.B. C. Reed, J. R. Astron. Soc. Canada 100, 146 (2006).ADS
  23.M. J. Reid, K. M. Menten, A. Brunthaler, X. W. Zheng, T. M. Dame, Y. Xu, Y. Wu, B. Zhang, A. Sanna, M. Sato, et al., Astrophys. J. 783, 130 (2014).ADS CrossRef
  24.A. Sanna, M. J. Reid, K. M. Menten, T. M. Dame, B. Zhang, M. Sato, A. Brunthaler, L. Moscadelli, and K. Immer, Astrophys. J. 781, 108 (2014).ADS CrossRef
  25.M. Sato, Y. W. Wu, K. Immer, B. Zhang, A. Sanna, M. J. Reid, T. M. Dame, A. Brunthaler, and K. M. Menten, Astrophys. J. 793, 72 (2014).ADS CrossRef
  26.Y. Sofue, Publ. Astron. Soc. Jpn. 63, 813 (2011).ADS CrossRef
  27.L. Spitzer, Astrophys. J. 95, 329 (1942).ADS CrossRef
  28.R. Stothers and J. A. Frogel, Astron. J. 79, 456 (1974).ADS CrossRef
  29.M. Wienen, F. Wyrowski, K. M. Menten, J. S. Urquhart, T. Csengeri, C. M. Walmsley, S. Bontemps, D. Russeil, L. Bronfman, et al., Astron. Astrophys. 579, 91 (2015).ADS CrossRef
  30.Y. W. Wu, M. Sato, M. J. Reid, L. Moscadelli, B. Zhang, Y. Xu, A. Brunthaler, K. M. Menten, T. M. Dame, and X. W. Zheng, Astron. Astrophys. 566, 17 (2014).ADS CrossRef
  31.Y. Xu, J. J. Li, M. J. Reid, X. W. Zheng, A. Brunthaler, L. Moscadelli, T. M. Dame, B. Zhang, Astrophys. J. 769, 15 (2013).ADS CrossRef
  
• 作者单位：V. V. Bobylev (1)
  A. T. Bajkova (1)
  
  1. Pulkovo Astronomical Observatory, Russian Academy of Sciences, Pulkovskoe sh. 65, St. Petersburg, 196140, Russia
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Astronomy
  Astrophysics
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1562-6873

文摘

Data on HII regions, molecular clouds, and methanol masers have been used to estimate the Sun’s distance from the symmetry plane z _⊙ and the vertical disk scale height h. Kinematic distance estimates are available for all objects in these samples. The Local-arm (Orion-arm) objects are shown to affect noticeably the pattern of the z distribution. The deviations from the distribution symmetry are particularly pronounced for the sample of masers with measured trigonometric parallaxes, where the fraction of Local-arm masers is large. The situation with the sample of HII regions in the solar neighborhood is similar. We have concluded that it is better to exclude the Local arm from consideration. Based on the model of a self-gravitating isothermal disk, we have obtained the following estimates from objects located in the inner region of the Galaxy (R ≤ R ₀): z _⊙ = −5.7 ± 0.5 pc and h ₂ = 24.1 ± 0.9 pc from the sample of 639 methanol masers, z _⊙ = −7.6±0.4 pc and h ₂ = 28.6±0.5 pc from 878HII regions, z _⊙ = −10.1 ± 0.5 pc and h ₂ = 28.2 ± 0.6 pc from 538 giant molecular clouds.