Abstract
This paper discusses recent results obtained by myself and my colleagues in three domains of astrophysics: interstellar supersonic turbulence, circumstellar disks, and natural masers and lasers. S.A. Kaplan, S.B. Pikelner, and I.S. Shklovskii were among those who, 30-40 years ago, laid the foundation of these domains.
H2O masers become an effective probe of supersonic turbulence associated with mass outflow from very young stars. They demonstrate a very low (≲1) fractal dimension of the spatial set on which turbulence dissipates its kinetic energy, and, thereby, a strong intermittency of the turbulence. They also indicate that supersonic turbulence, like incompressible turbulence, has an inner scale, on which the bulk of turbulent energy dissipates in low-Mach, random shocks. H2O masers themselves find thereby a new pumping source in these random shocks.
Masers in hydrogen recombination lines, discovered 8 years ago, originate in a circumstellar disk surrounding a massive star MWC 349A. They give a possibility to investigate kinematics and structure of the disk. Far-infrared nydrogen recombination lines, recently detected in MWC349A from the Kuiper Airborn Observatory, proved to be amplified as well. They are the first known natural amplifiers of electromagnetic waves in the laser wavelength domain. Analysis of their radiation, along with the radiation in other recombination lines, gives a possible key to understanding the lack of optical lasers in the Universe.
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Alexander, J., Reid, M.J., Moran, J.M., & Strelnitski, V.S.: 1997, to be submitted to the Ap. J.
Gordon, M.: 1992, Ap. J. 387, 701
Frish, U., Sulem, P.L., and Nelkin, M.: 1978, J. Fluid Mech. 87, 719
Fleck, R.C.: Jr. 1981, Ap. J. (Letters) 246, L151
Gwinn, C.: 1994, Ap. J. 429, 241
de Vaucouleurs, G.:, Science 167, 1203
Dickman, R.L: 1985, ‘Protostars and Planets. II’ in D.C. Black & M.S. Matthews, ed(s).,, Univ. of Arizona Press: Tucson, 150
Hamann, F. & Simon, M.: 1986, Ap. J. 311, 909
Kaplan, S.A.: 1954a, Doklady Akademii Nauk SSSR 94, 699
Kaplan, S.A.: 1954b, JETP 27, 699
Kaplan, S.A.: 1966, Interstellar Gas Dynamics, Pergamon Press: Oxford
Cohen, M., Bieging, J.H., Dreher, J.W., & Welch, W.J.: 1985, Ap. J. 292, 249
Larson, R.B.: 1981, M.N.R.A.S. 194, 809
Mandelbrot, B.B.: 1983, The Fractal Geometry of Nature, Freeman: New York
Martin-Pintado, J., Bachiller, R., Thum, C., & Walmsley, C.M: 1989, Ap. J. 215, L13
Mioshi, M., Moran, J., Herrnstein, J., Greenhill, L., Nakai, N., Diamond, P., & Inoue, M.: 1995, Nature 373, 127
Pikelner, S.B. & Strelnitski, V.S.: 1976, Astrophys,& Space Science 39, L19
Plambeck, R.L., Wright, M.C.H., & Carlstrom, J.E.: 1990, Ap. J. 348, L65
Ponomarev, V.O., Smith, H.A., & Strelnitski, V.S.: 1994, Ap. J. 424, 976
Sargent, A.I. & Beckwit, S.V.W.: April 1993, Physics Today
Scalo, J.M.: 1987, ‘’ in D.J. Hollenbach and H.A. Thronson, ed(s)., Interstellar Processes, Reidel Publishing Co., 349
Strelnitski, V.S., Smith, H.A., Haas, M.R., Colgan, S.W.J., Erickson, E.F., Geis, N., Hollenbach, D.J., & Townes, C.H.: 1995, ‘’ in M.R. Haas, J.A. Davidson,& E.F. Erickson, ed(s)., Proc. Airborne Astronomy Symposium on the Galactic Ecosystem: From Gas to Stars to Dust, ASP: San Francisco, 271
Strelnitski, V.S., Smith, H.A., & Ponomarev, V.O.: 1996a, Ap. J. 470, 1134
Strelnitski, V.S., Haas, M.R., Smith, H.A., Erickson, E.F., Colgan, S.W.J., & Hollenbach, D.J.: 1996b, Science 272, 1459
Strelnitski, V.S., Moran, J.M., Reid, M.J., & Alexander, J.V.: 1997, to be submitted to the Ap. J.
Thum, C., Martin-Pintado, J. & Bachiller, R.: 1992, Astr. Ap. 256, 507
Thum, C., Matthews, H.E., Harris, A.I., Tacconi, L.J., huster, K.F., & Martin-Pintado, J.: 1994a, Astr. Ap. 288, L25
Thum, C., Matthews, H.E., Martin-Pintado, J., Serabyn, E., Planesas, P., & Bachiller, R.: 1994b, Astr. Ap.,, 283 582
von Hörner, S.: 1951, Zs. f. Ap. 30, 17
von Weizsäcker, C.F.: 1951, Ap. J. 114, 165
Walker, R.C: 1984, Ap. J. 280, 618
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Strelnitski, V. Masers, Lasers and the Interstellar Medium. Astrophysics and Space Science 252, 279–287 (1997). https://doi.org/10.1023/A:1000892300429
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DOI: https://doi.org/10.1023/A:1000892300429