Herbig-Haro objects and post-FUOR's (English)

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In: Astrophysics   ;  11 ,  3  ;  341-344  ;  1975

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Conclusions In this work, we propose that the Herbig-Haro objects can be divided into two groups. Objects in the first group have luminosities which can be quantitatively explained by reflection of the light from a neighboring source. Objects in the second group are not illuminated from outside. For the objects in the second group we propose the following hypothesis. There is an analogy between the nature of the Herbig-Haro objects and the post-FUOR's, in the sense that these objects are FUOR's in which the ejected envelope has expanded and is now quite tenuous. In support of this hypothesis, we mention the following points: the negative velocity of the material being ejected from the central star; the polarization of the light from the Herbig-Haro objects; and finally, the fact that it is possible to interpret the maximum in the spectrum of H-H 1 around 6500 Å (a maximum which is apparently real) in terms of emission from neutral hydrogen atoms which form in a flux of protons streaming through the material.

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Morphological study of 40 Markaryan galaxies
Börngen, F. / Kalloglyan, A. T. | 1975
Spectral observations of galaxies with high surface brightness. II
Arakelyan, M. A. / Dibai, É. A. / Esipov, V. F. | 1975
Polarization observation of compact extragalactic objects
Babadzhanyants, M. K. / Hagen-Thorn, V. A. | 1975
Ultraviolet spectrophotometry of a group of hot stars in Vela
Gurzadyan, G. A. / Oganesyan, R. Kh. | 1975
Equations for the transfer of electromagnetic radiation and the excitation of Langmuir turbulence in a decay interaction
Lomadze, R. D. | 1975
The balmer decrement in a medium made transparent by powerful radiation
Kaplan, S. A. / Kulinich, V. V. | 1975
Nonstationary radiation transfer in scattering media
Rogovtsov, N. N. / Samson, A. M. | 1975
Incoherent scattering. V
Gevorkyan, M. S. / Engibaryan, N. B. / Nikogosyan, A. G. | 1975
Continuous spectra of WR stars
Ryl'kov, V. P. | 1975
Ellipsoidal figures of equilibrium of interstellar medium inside spheroidal galaxies
Abramyan, M. G. | 1975
Theory of scattering photospheres
Sobolev, V. V. | 1975
Herbig-Haro objects and post-FUOR's
Gyul'budagyan, A. L. | 1975
Rapidly rotating massive white dwarfs
Adzhyan, G. S. / Vartanyan, Yu. L. | 1975
Transition radiation and peculiar nebulas
Gurzadyan, G. A. | 1975
Dynamical evolution and instability of trapezium-type systems
Mirozoyan, L. V. / Mnatsakanyan, M. A. | 1975
Infrared observations in the region of the cluster NGC 7419
Vardanyan, R. A. / Akhverdyan, L. G. | 1975
Nuclei and HII regions
Iskudaryan, S. G. | 1975
A unique method of constructing force-free magnetic fields
Osherovich, V. A. | 1975
Supernova in an anonymous galaxy
Erastova, L. K. | 1975