Laser Astrophysics

 Astrophysical Lasers

 

29.       Stimulated radioemission of the interstellar medium.
            V.S. Letokhov.
            Pis’ma Zh. Eskp. Teor. Fiz. 4, 11, 477-481 (1966) (in Russian);
            [Sov. Phys.-JETP   Lett. 4, 321-323 (1966)].

 

89a.     Space maser with a feedback.
            V.S. Letokhov.
            Astronomicheskii Zhurnal (Astronomical J.) 49, 4, 737-743 (1972) (in Russian);
            [Sov. Astr. - AJ 16, 604-609 (1973)].

 

89b.     Laser action in stellar atmospheres.
            V.S. Letokhov.
            IEEE Journ. Quant. Electr. QE-8, 6, 615 (1972); Preprint of Inst. of Spectroscopy
            9, 1-24 (1972).

 

148.     The possibility of the laser effect in stellar atmospheres.
            N.N. Lavrinovich and V.S. Letokhov.
            Zh. Eksp. Teor. Fiz. 67, 5(11), 1609-1620 (1974) (in Russian);
               [Sov. Phys. JETP 40, 800-805 (1974)].

 

210.     On the detection of narrow "laser" lines obscured by spatially inhomogeneous
            broadening in stellar atmosphere emissions.
            N.N. Lavrinovich and V.S. Letokhov.
            Kvantovaya Elektronika 3, 9, 1948-1954 (1976) (in Russian).

 

679.     Noncoherent Feedback in Space Masers and Stellar Lasers.
            V.S.
Letokhov.
            In: Amazing Light, ed. by R.Y. Chiao, Springer, Berlin (1996), pp. 409-443.

 

793.     Laser Action in Space: 1 mm Lines of FeII in Gaseous Condensations in the
            Vicinity of
Eta Car.
            S. Johansson and V.S. Letokhov.
            Pis’ma ZhETF 75, 591-594 (2002); [JETP Lett. 75(10), 591-594 (2002)].
 

798a.   Astrophysical Lasers.
            V.S. Letokhov.
            Kvantovaya Elektronika 32(12) 1065-1079 (2002);
            [Quantum Electronics, 32(12) 1065-1079 (2002)].

 

798b.   Lasing in Space.
            V.S. Letokhov.
            UFN 172(12), 1468-1470 (2002); [Phys. Usp. 45, 1306-1309 (2002)].


801.     Radiative Cycle with Stimulated Emission from Atoms and Ions in an Astrophysical Plasma.
            S. Johansson and V.S. Letokhov.
            Phys. Rev. Lett. 90, №1, 011101-1-4 (2003).


810.     Astrophysical Lasers with Radiation Pumping by Accidental Resonance.

            S. Johansson, V.S. Letokhov.
            Publ. of Astr. Soc. of Pacific 115, 1375-1382 (2003).

 
819.     Astrophysical Lasers Operating in Optical FeII Lines in Stellar Ejecta of a Eta Carinae.
            S. Johansson and V.S. Letokhov.
            Astronomy and Astrophysics 428, 497-509 (2004).

 
824.     Astrophysical laser spectroscopy.
            S. Johansson and V.S. Letokhov.
            Proceedings of 17th International Conference on Laser Spectroscopy, 19-24 June, 2005,
            Scotland, ed. by E.A. Hinds, A. Ferguson, E. Riis (World Scientific), pp. 80-93.

 

826.     Stimulated Amplification in Spatially Nonhomogeneous Conditions: Astrophysical
            Fe II Laser in Vicinity of Eta Carinae.

            S. Johansson and V.S. Letokhov.
            Physica Scripta T120, 99-104 (2005).

 

829a.   Astrophysical Lasers in Optical Fe II Lines in Gas Condensations near Eta Carinae.
            S. Johansson and V.S. Letokhov.
            Proceedings of XIX Intern. Conf. on Atomic Physics, July 2004, Atom Physics-19,
            Rio-de-Janeiro, ed. L. Mareassa, K. Helmerson, V. Bagnato. AIP Conf . Proceed.,
            N.Y., 399-410 (2005).

 

829b.   Stimulated Amplification in Astrophysical Plasma: Fe II Space Laser in Gas
            Condensation in the Vicinity of Eta Carinae.

            S. Johansson and V.S. Letokhov.
            Proceedings of Fourth International Symposium MPLP-2004, “Modern Problems of Laser
            Physics”, Novosibirsk, 2005, 18-27.

 

829c.   Stimulated amplification in astrophysical plasma: an Fe II space laser in gas
            c
ondensations in the vicinity of Eta Carinae.

            S. Johansson and V.S. Letokhov.
            Laser Physics 15, 7, 1-8 (2005).

 

831.     Possibility of measuring the width of narrow Fe II astrophysical laser lines
            in the vicinity of
Eta Carinae by means of Brown-Twiss-Townes heterodyne
            correlation interferometry.

            S. Johansson and V.S. Letokhov.
            New Astronomy Journal 10, 361-369 (2005).

 

833.     Astrophysical laser on OI 8446 Å line in Weigelt blobs of Eta Carinae.
            S. Johansson and V.S. Letokhov.
            Monthly Notices of Royal Astronomical Society 364, 731-737 (2005).

 

842.     Astrophysical Lasers and Nonlinear Optical Effects in Space.
            S. Johansson and V.S. Letokhov.
            New Astronomy Reviews 51, 443-523 (2007).

 

845.     Possibility of heterodyne correlation interferometry with tunable laser and
            a
bsolute frequency measurement.

            S. Johansson, V. Letokhov.
            “Precision Spectroscopy in Astrophysics”, eds. N.C. Santos, L. Pasquini, A.C. Correia,
            M. Romaniello (Springer-Verlag, Berlin), 243-246 (2008).

 

Nonlinear optical effects in space

 

775.     Resonance-Enhanced Two-Photon Ionization of Ions by Lyman {alpha}
            Radiation in Gaseous Nebulae.

            S. Johansson, V.S. Letokhov.
            Science 291, 625-627 (2001).

 

776.     Multiple Two-Photon Resonance-Enhanced Ionization of Elements in Natural
            Conditions.

            S. Johansson and V.S. Letokhov.
            Pis’ma ZhETF 73, 135-137 (2001).

 

783.     Successive Resonance-Enhanced Two-Photon Ionization of Elements inside Nebulae:
            I. Atoms and Ions C, N, and O.

            S. Johansson, V.S. Letokhov.
            Astronomy and Astrophysics 376, 319-327 (2001); [Erratum: AA, 395, 345 (2002)].

 

816.     Possibility of Successive Resonance-Enhanced Two-Photon Ionization of Ne and Ar
            in an Astrophysical Plasma.

            S. Johansson and V.S. Letokhov.
            Astronomical Journal (Russian) 81, 4, 1-9 (2004).

 

835.     Resonance-enhanced two-photon ionization (RETPI) of SiII and anomalous, variable
            intensity of {lambda}
1892 Å SiIII line in the Weigelt blobs of Eta Carinae.
            S. Johansson, H. Hartman, V.S. Letokhov.
            Astronomy and Astrophysics 452, 253-256 (2006).

 

Astrophysical spectroscopy

 

777.     Mysterious UV Lines of FeII from Eta Car Blobs.
            S. Johansson, V.S. Letokhov.
            In: Eta Carinae and Other Mysterious Stars. T. Gull, S. Johansson, K. Davidson (Eds.),
            ASP Conf. Series, vol. 242, 297-308 (2001).

 

778.     Fluorescence Lines in Eta Carinae and Other Objects.
            S. Johansson, T. Zethson, H. Hartman, V.S. Letokhov.
            In: Eta Carinae and Other Mysterious Stars. T.Gull, S.Johansson, K.Davidson (Eds.),
           ASP Conf. Series, vol. 242, 309-324 (2001).

 

784.     A Model for the Origin of the Anomalous and Very Bright UV Lines of FeII in Gaseous
            Condensations of the Star Eta Carinae.

            S. Johansson, V.S. Letokhov.
            Astronomy and Astrophysics 378(1) 266-278 (2001).

 

787.     The Origin of the Anomalous Intensity Ratio between Very Bright UV FeII Lines
            and its Satellites in Gaseous Condensations of the Star Eta Carinae.

            V.  Klimov, S. Johansson, V. Letokhov.
            Astronomy and Astrophysics 335, 313-327 (2002).

 

809      Anomalously Bright UV Lines of Fe II as a Probe for Gas Condensations in Vicinity of Hot Stars.
            S. Johansson, V.S. Letokhov.
            Astronomy and Astrophysics 412, 771-776 (2003).

 

814.     Anomalous Spectral Effects Fe II Lines and High Temperature HI Ly {alpha} in Gaseous
            Condensations in Vicinity of
Eta Carinae.
            S. Johansson and V.S. Letokhov.
            Pis’ma v Astrophys. Journ. (Russian) 30, №1, 67-73 (2004);
            [Astronomy Lett. 30,
1, 58-63 (2004)].

 

828.     Metastable Hydrogen Absorption in Ejecta Close to Eta Carinae.
            S. Johansson, T.R. Gull, H. Hartman and V.S. Letokhov.
            Astronomy and Astrophysics 435, 183-189 (2005).

 

832.     Time variations of the narrow Fe II and HI spectral lines from the close vicinity
            of
Eta Carinae during spectral event of  2003.
            H. Hartman, A. Damineli, S. Johansson, V.S. Letokhov.
            Astronomy and Astrophysics 436, 945-982 (2005).

 

840.     Unusual spectral effects in vicinity of enigmatic Eta Carinae star.
            S. Johansson and V.S. Letokhov.
            Vestnik RAN (Herald of Russian Acad. of Sci.) 77(1), 27-32 (2007).