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Surface Brightness Measurements of Extended Galactic Nebulae

Published online by Cambridge University Press:  05 March 2013

Ronald Stark  and
Klaus Reif
Ronald Stark
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D–53121 Bonn, Germany; [email protected]
Klaus Reif
Affiliation:
Sternwarte, Universität Bonn, Auf dem Hügel 71, D–53121 Bonn, Germany
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Abstract

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We discuss the importance of digitised sky-limited Schmidt B- and R-band, and Hα images of extended translucent (AB ≃ 1–5 mag) and dark (AB > 5 mag) clouds. In translucent clouds (e.g. high-latitude cirrus) photons can penetrate through the whole cloud and control the physical and chemical processes. Comparison of the B images with far-infrared/submillimetre CO, CI, and CII emission provides important information on the non-homogeneous cloud structure, carbon chemistry and energy balance. In dark clouds the interior is completely shielded from the interstellar radiation field. L1204 is a dark cloud with at its edge the well-known HII rim S140. The R-band image shows S140 as well as the diffuse extended HII region around the exciting B-type star. However, the sensitivity for Hα in the R-band is rather low and there is contamination with diffusely scattered red light from dust. Deep Hα and R-band imaging of an ∼20′×20′ field has recently been done with the 1 m Hoher List telescope of Bonn University. A wealth of small-scale structures can been seen on continuum-subtracted images which provide new insight on the geometry of this cloud.

Keywords

ISM: cloudsdustindividual (cirrus, L1204/S140)reflection nebulae: structure
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 15 , Issue 1 , 1998 , pp. 86 - 90
Copyright
Copyright © Astronomical Society of Australia 1998

References

Bally, J., & Lada, C. 1983, ApJ, 265, 824 CrossRefGoogle Scholar
Beichman, C. A., Becklin, E. E., & Wynn-Williams, C. G. 1979, ApJ, 232, L47 CrossRefGoogle Scholar
Crampton, D., & Fisher, W. A. 1974, Publ. Dom. Ap. Obs. 14, No. 12Google Scholar
de Vries, E. F., & Black, J. H. 1988, ApJ, 334, 771 Google Scholar
Draine, B. T. 1978, ApJS, 36, 595 CrossRefGoogle Scholar
Emery, R., Aanestad, P., Minchin, N., Unger, S. J., Baluteau, J.-P., et al. 1996, A&A, 315, L285 Google Scholar
Evans, N. J. II, Mundy, L. G., Kutner, M. L., & DePoy, D. L. 1989, ApJ, 346, 212 CrossRefGoogle Scholar
Ingalls, J. G., Bania, T. M., & Jackson, J. M. 1994, ApJL, 431, 139 CrossRefGoogle Scholar
Ingalls, J. G., et al. 1997, ApJ, 479, 296 CrossRefGoogle Scholar
King, D. J., Taylor, K. N. R., & Tritton, K. P. 1979, MNRAS, 188, 719 CrossRefGoogle Scholar
Larson, K. 1998, PASA, 15, 155 CrossRefGoogle Scholar
MacGillivray, H. 1998, PASA, 15, 42 CrossRefGoogle Scholar
Malin, D. 1998, PASA, 15, 38 CrossRefGoogle Scholar
Paley, E. S., Low, F. J., McGraw, J. T., Cutri, R. M., & Rix, H.-W. 1991, ApJ, 376, 335 CrossRefGoogle Scholar
Phillipps, S., & Parker, Q. A. 1993, MNRAS, 265, 385 CrossRefGoogle Scholar
Plume, R., Jaffe, D. T., & Keene, J. 1994, ApJL, 425, 49 CrossRefGoogle Scholar
Sandage, A. 1976, AJ, 81, 954 CrossRefGoogle Scholar
Schwartzenberg, J. M., Phillipps, S., & Parker, Q. A. 1995, A&A, 293, 332 Google Scholar
Schwartzenberg, J. M., Phillipps, S., & Parker, Q. A. 1996, A&AS, 117, 179 Google Scholar
Sharpless, S. 1959, ApJS, 4, 257 CrossRefGoogle Scholar
Smirnov, G. T., Sorochenko, R. L., & Walmsley, C. M. 1995, A&A, 300, 923 Google Scholar
Spaans, M., & van Dishoeck, E. F. 1997, A&A, 373, 953 Google Scholar
Stark, R. 1995, A&A, 301, 873 Google Scholar
Stark, R., & van Dishoeck, E. F. 1994, A&A, 386, L43 Google Scholar
van Dishoeck, C. P., & Le Poole, R. S. 1985, A&A, 145, L7 Google Scholar