Modelling of H II region emission with bubble-like structure inside
Heading:
| 1Koshmak, IO, 1Melekh, BY 1Ivan Franko National University of Lviv, Lviv, Ukraine |
| Kinemat. fiz. nebesnyh tel (Online) 2013, 29(6):3-19 |
| Start Page: Structure and Dynamics of the Galaxy |
| Language: Ukrainian |
Abstract: The influence of bubbles on the ionization spectrum shape as well as on the emission line formation is investigated using multicomponent photoionization modelling. The first and second inner components of such modelling correspond to the hypersonic stellar wind zone and to the zone of shocked stellar wind from the central starburst region, respectively. The gas density distribution in these components is derived from bubble structure obtained from equation system of continuity and energy transfer including heat conductivity. The third component is a thin shell of high density gas formed by wind shock from the surrounding gas. The fourth component is a typical H II region. Input spectra of the ionizing radiation are obtained from the starburst evolutional models. The evolutional grid of the multicomponent photoionization models with different bubble parameters is calculated. The influenсe of bubble presence inside the H II region on the continuum spectrum shape changing as well as on the formation of radiation fluxes in important emission lines is analysed. |
| Keywords: bubble-like structures, simulation, stellar wind |
References:
1.N. G. Bochkarev and S. A. Zhekov, “X-Ray radiation of certain nebulae formed by the stellar wind,” Astron. Zh. 67, 274–292 (1990).
2.B. Ya. Melekh, L. S. Pilyugin, and R. I. Korytko, “Relationship between intensities of strong emission lines in the spectra of H II regions and their chemical compositions,” Kinematics Phys. Celestial Bodies 28, 189–202 (2012).
https://doi.org/10.3103/S0884591312040046
3.F. Bresolin, D. Schaerer, R. M. González Delgado, et al., “A VLT study of metal-rich extragalactic H II regions. I. Observations and empirical abundances,” Astron. Astrophys. 441, 981–997 (2005).
https://doi.org/10.1051/0004-6361:20053369
4.K. Davidson, “On photoionization analyses of emission spectra of quasars,” Astrophys. J. 218, 20–32 (1977).
https://doi.org/10.1086/155653
5.J. E. Dyson and D. A. Williams, Physics of the Interstellar Medium (Wiley, New York, 1997).
https://doi.org/10.1887/075030460X
6.G. Ferland, L. Binette, M. Contini, et al., in The Analysis of Emission Lines. Proceedings of the Space Telescope Science Institute Symposium Held in Baltimore, Maryland, May 16–18, 1994, Ed. by R. Williams and M. Livio (Cambridge University Press, 2005).
7.G. J. Ferland, Hazy, a brief introduction to Cloudy 90. http://www.astro.uni-koeln.de/site/pdr-compari-son/DOCS/hazy1.pdf.
8.L. Gutiérrez and J. E. Beckman, “The galaxy-wide distributions of mean electron density in the H II regions of M 51 and NGC 4449,” Astrophys. J., Lett. 710, L44–L48 (2010).
https://doi.org/10.1088/2041-8205/710/1/L44
9.B. C. Koo and C. F. McKee, “Dynamics of wind bubbles and superbubbles. I. Slow winds and fast winds. II. Analytic theory,” Astrophys. J. 388, 93–126 (1992).
https://doi.org/10.1086/171132
10.R. V. Kozel and B. Ya. Melekh, “Photoionization modelling of HII region with stellar wind bubble inside,” in Proceedings of the 16th Young Scientists’ Conference on Astronomy and Space Physics, Ed. by V. Ya. Choliy and G. Ivashchenko (Kyiv, 2009), pp. 37–41.
11.T. Lanz and I. Hubeny, “A grid of non-LTE line-blanketed model atmospheres of O-type stars,” Astrophys. J., Suppl. Ser. 146, 417–441 (2003).
https://doi.org/10.1086/374373
12.T. Lanz and I. Hubeny, “A grid of NLTE line-blanketed model atmospheres of early B-type stars,” Astrophys. J., Suppl. Ser. 169, 83–104 (2007).
https://doi.org/10.1086/511270
13.C. Leitherer, D. Schaerer, J. D. Goaldader, et al., “Starburst 99: synthesis models for galaxies with active star formation,” Astrophys. J., Suppl. Ser. 123, 3–40 (1999).
https://doi.org/10.1086/313233
14.B. Ya. Melekh, “Optimized photoionization modelling of H II region in blue compact dwarf galaxy SBS 0335-052,” J. Phys. Stud. 11, 353–365 (2007).
15.B. Ya. Melekh, “Two-Stages optimized photoionization modelling of H II region in blue compact galaxy SBS 0335-052,” J. Phys. Stud., 13, 3901-1–3901-16 (2009).
16.B. Ya. Melekh, I. O. Koshmak, and R. V. Kozel, “The influence of stellar wind bubbles on the radiation ionizing field in the nebular objects,” J. Phys. Stud. 3, 3901–3908 (2011).
17.G. Mellema, “The interaction of stellar winds with their environment: theory and modelling,” Astrophys. Space Sci. 260, 203–213 (1998).
https://doi.org/10.1023/A:1001896920236
18.D. Pequignot, Model Nebulae. Proceedings of a Workshop Held at the Observatoire de Meudon, France, July 8–19 1985 (Observatoire de Paris-Meudon, Meudon, 1986).
19.L. S. Pilyugin, J. M. Vilchez, and T. X. Thuan, “New improved calibration relations for the determination of electron temperatures and oxygen and nitrogen abundances in H II regions,” Astrophys. J. 720, 1738–1751 (2010).
https://doi.org/10.1088/0004-637X/720/2/1738
20.J. P. Vallee, “Interstellar magnetic bubbles,” Astrophys. J. 419, 670–673 (1993).
https://doi.org/10.1086/173517
21.R. Weaver, R. McCray, J. Castor, et al., “Interstellar bubbles. II. Structure and evolution,” Astrophys. J. 218, 377–395 (1977).
https://doi.org/10.1086/155692
22.D. Zaritsky, R. C. Kennicutt, and J. P. Huchra, “H II regions and the abundance properties of spiral galaxies,” Astrophys. J. 420, 87–109 (1994).
https://doi.org/10.1086/173544