Astrophysics and Space Science

, Volume 87, Issue 1–2, pp 121–148 | Cite as

Surface photometry of theHii regions S254–S257

  • S. Mizuno


The surface photometry of S254–S257 has been carried out by means of a wide range image processing technique in the reduction system. The photographic plates in the Hα+[NII] andV-bands are taken with the Schmidt telescope. Especially, we have obtained the calibrated map of theHii region, superposing two or more plates with different exposure times, and removing the star images. Three kinds of calibrated maps of theHii regions are drawn: (1)E-map in the (Hα+[NII]+continuum) (2)V-map in the continuum atV-band, (3)(E-V)-map in the (Hα+[NII]) line emission. The intensity profiles across the nebular centers were also obtained. Based on calibrated maps, the morphological structure and mass distribution of S255 and S257 are discussed. The location of observed nebulae on the (mmv) diagram, wherem andmv denote the surface brightness, expressed in the magnitude per square arcmin, is shown together with that of some other nebulae. Some arguements on the age sequence of observedHii regions are presented.


Image Processing Exposure Time Mass Distribution Line Emission Processing Technique 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Allen, C. W.: 1973,Astrophysical Quantities, (3rd ed.), Athlone Press, University of London.Google Scholar
  2. Arp, H. and Lorre, J.: 1976,Astrophys. J. 210, 58.Google Scholar
  3. Brault, J. W. and White, O. R.: 1971,Astron. Astrophys. 13, 169.Google Scholar
  4. Chopine, M., Baudel, L. D., and Lortet-Zuckermann, M. C.: 1974,Astron. Astrophys. 30, 233.Google Scholar
  5. de Vaucouleurs, G.: 1962, in G. C. McVittie (ed.), ‘Problem of Extra-Galactic Research”IAU Symp. 15, 3.Google Scholar
  6. de Vaucouleurs, G.: 1968,Applied Optics 7, 1513.Google Scholar
  7. Hoag, A. A., Johnson, H. L., Iriarte, B., Mitchell, R. I., Hallam, K. L., and Sharpless, S.: 1961,Publ. U.S. Naval Observatory XVII.Google Scholar
  8. Ishida, K. and Kawajiri, N.: 1968,Publ. Astron. Soc. Japan 20, 95.Google Scholar
  9. Israel, E. P.: 1976,Astron. Astrophys. 52, 175.Google Scholar
  10. Israel, F. P.: 1977,Astron. Astrophys. 61, 386.Google Scholar
  11. Jones, W. B., Obitts, D. L., Gallet, R. M., and de Vaucouleurs, G.: 1967,Publ. Dept. Astron., Univ. Texas, Ser. II,1, No. 8.Google Scholar
  12. Lorre, J.: 1979,JPL Publication 79-109, Jet Propulsion Laboratory, Pasadena, Calif., November 1, 1979.Google Scholar
  13. Mizuno, S., Sakka, K., Sasaki, T. and Kogure, T.: 1981a,Astrophys. Space Sci. 78, 235.Google Scholar
  14. Mizuno, S. Sakka, K., Sasaki, T., Kogure, T., Nakano, M., and Wiramihardja, S. D.: 1981b,Proc. Second Asian-Pacific Regional Meeting in Astronomy, held in Bandung on August 24–31, 1981 (in press).Google Scholar
  15. Okamura, S.: 1977,Ann. Tokyo Astron. Obs., 2nd Ser. XVI, No. 3, 111.Google Scholar
  16. Pismis, P.: 1970,Bol. Obs. Tonantzintla Tacubaya 5, 219.Google Scholar
  17. Pismis, P. and Hasse, I.: 1976,Astrophys. Space Sci. 45, 79.Google Scholar
  18. Pyatunia, T. B.: 1980,Astrophys. Space Sci. 67, 173.Google Scholar
  19. Shajn, G. A., Hase, V. F., and Pikelner, S. B.: 1954,Izvest. Crimean Astr. Obst. 12, 64.Google Scholar
  20. Silverglate, P. R. and Terzian, Y.: 1979,Astrophys. J. Suppl. 39, 157.Google Scholar
  21. Takase, B., Ishida, K., Shimizu, M., Maehara, H., Hamajima, K., Noguchi, T., and Ohashi, M.: 1977,Ann. Tokyo Astron. Obs., 2nd Ser.XVI, No. 2, 74.Google Scholar
  22. Tsubaki, T. and Engvold, O.: 1975,AAS Photo-Bulletin 9, 17Google Scholar

Copyright information

© D. Reidel Publishing Co. 1982

Authors and Affiliations

  • S. Mizuno
    • 1
  1. 1.Kanazawa Institute of TechnologyKanazawaJapan

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