Abstract
We carried out millimeter-range observations of carbon radiolines from Photo-Dissociation Regions (PDRs). Comparison with observations of these objects in infrared fine structure lines of CII and OI allows one to determine the physical conditions in the PDRs (density, temperature, and thickness of the PDR layer) that were done for several regions connected to HII regions. It is shown that recombination radiolines also allow the kinematics of the complexes including HII regions and PDRs to be traced.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
R. L. Sorochenko and M. A. Gordon, Radio Reñombination Lines (Fizmatlit, Moscow, 2003; Kluwer, Dordrecht, 2002).
R. L. Sorochenko and A. P. Tsivilev, “Detection of S56 and S57 Radio Lines in W3A Source-First Radio Recombination “Carbon Lines in Millimeter Range,” in Proc. of the Year Session of Sci. Soc. AKTs FIAN (Fiz. Inst. Lebedeva, Moscow, 1996), pp. 4–8.
R. L. Sorochenko and A. P. Tsivilev, “Physical Conditions in Photodissociation Regions from Observations of Carbon Radio Recombination Lines and IR Fine Structure Lines of CII and OI,” Astron. Zh. 77(7), 488–498 (2000) [Astron. Rep. 44, 426 (2000)].
A. P. Tsivilev, “Determination of the Primordial Helium Abundance from Radio Recombination Line Observations,” Pis’ma Astron. Zh. 35(10), 745–754 (2009) [Astron. Lett. 35, 670 (2009)].
N. Bohr, “Om brintsrektret,” Fisisk Tidsskraft. 12, 97–114 (1914).
N. J. Evans, L. G. Munday, J. H. Davies, and P. V. Bout, “Submillimeter Spectral Line Observations in Very Dense Regions,” Astrophys. J. 312, 344–350 (1987).
F. Herrman, S. C. Madden, T. Nicola, et al., “The Orion Molecular Clouds OMC-1 and OMC-2 Mapped in the Far-Infrared Fine-Structure Line Emission of C+ and O0,” Astrophys. J. 481, 343–354 (1997).
D. T. Jaffe, S. Zhou, J. E. Howe, et al., “Ultraviolet-Illuminated Molecular Cloud Boundaries: Extended [C II] 158 Micron Emission Toward L1630,” Astrophys. J. 436, 203–215 (1994).
E. Krugel, C. Thum, and J. Martin-Pintado, “Stucture of Orion B (NGC2024): A Recombination Line and Continuum Map,” Astron. Astrophys., Suppl. Ser. 48, 345–353 (1982).
B. Mookerjea, S. K. Ghosh, H. Kaneda, et al., “Mapping of Large Scale 158 μm Line Emission: Orion A,” Astron. Astrophys. 404, 569–578 (2003).
P. Palmer, B. Zuckerman, A. E. Lilley, and P. G. Mezger, “Detection of a New Microwave Spectral Line,” Nature 215, 40–41 (1967).
V. Pankonin, C. M. Walmsley, T. L. Wilson, and P. Thomasson, “A Study of the Partially Ionized Medium in the Vicinity of the H II Region NGC 2024 and W3,” Astron. Astrophys. 57, 341–351 (1977).
L. J. Ricard, B. Zuckerman, P. Palmer, and B. E. Turner, “Observations of the High-Frequency Carbon Recombination-Line Emission in NGC 2024 and IC 1795,” Astrophys. J. 218, 659–667 (1977).
G. T. Smirnov, R. L. Sorochenko, and C. N. Walmsley, “The S140/L1204 Complex: Recombination Lines of Hydrogen, Carbon and Sulfur,” Astron. Astrophys. 300, 923–932 (1995).
R. L. Sorochenko, “Radio Recombination Lines of Carbon as a Tool for Investigation of Molecular Clouds,” Astron. Astrophys. Trans. 11, 199–214 (1996).
G. T. Stacey, D. T. Jaffe, N. Geis, et al., “158 Micron [C II] Mapping for Investigation of Molecular Clouds,” Astron. Astrophys. J. 404, 219 (1993).
J. Stutzki, G. J. Stacey, R. Genzel, et al., “Submillimeter and Far-Unfrared Line Observation of M17 SW: a Clumpy Molecular Cloud Penetrated by Ultraviolet Radiation,” Astrophys. J. 332, 379–399 (1988).
A. G. G. M. Tielens and D. Hollenbach, “Photodissociation Regions. I. Basic Model,” Astrophys. J. 291, 722–746 (1985).
C. M. Walmsley and W. D. Watson, “The Influence of Dielectronic-Line Recombination at Low Temperature on the Interpretation of Interstellar, Radio Recombination Lines of Carbon,” Astrophys. J. 260, 317–325 (1982).
F. Wyrowski, P. Schlike, P. Hofner, and C. M. Walmsley, “Carbon Radio Recombination Lines in the Orion Bar,” Astrophys. J. 487, L171–L174 (1997).
B. Zuckerman and P. Palmer, “A New Interpretation of the Anomalous Microwave Recombination Line,” Astrophys. J. 153, L143–L149 (1968).
Author information
Authors and Affiliations
Additional information
Original Russian Text © R.L. Sorochenko, A.P. Tsivilev, 2010, published in Kinematika i Fizika Nebesnykh Tel, 2010, Vol. 26, No. 4, pp. 21–31.
About this article
Cite this article
Sorochenko, R.L., Tsivilev, A.P. Detection and application of carbon recombination lines in millimeter range. Kinemat. Phys. Celest. Bodies 26, 162–168 (2010). https://doi.org/10.3103/S0884591310040033
Received:
Published:
Issue Date:
DOI: https://doi.org/10.3103/S0884591310040033