All papers by Sveneric G. Johansson

Lund University - Physics Department

  1. Feibelman,W.A., Johansson,S.: 1995, ApJS 100, 405. C IV and O VI transitions in the region 1100-2000 and examples found in IUE spectra of hot stars.
  2. Johansson,S.: 1995, in Sauval,A.J., Blomme,R., Grevesse,N. (eds) "Laboratory and Astronomical High Resolution Spectra" ASP Conf. Series 81, 151. High resolution spectroscopy of singly ionized transition elements.
  3. Johansson,S., Brage,T., Leckrone,D.S., Nave,G., Wahlgren,G.M.: 1995, ApJ. 446, 361. Interpretation of anomalous UV transitions of Fe II observed in laboratory FTS and stellar HTS and IUE spectra.
  4. Johansson,S.G., Wallerstein, K. Krishnaswamy Gilroy and A. Joueizadeh: 1995, AA 300, 521. Fluorescence lines of Mn II in the red spectrum of eta Carinae.
  5. Johansson,S.G., Kalus,G., Brage,T., Leckrone,D.S., Wahlgren,G.M.: 1995, ApJ. (in press). Hyperfine structure and isotope shift in Tl II with astrophysical applications,
  6. Johansson,S.G.: 1995, Technical Digest Series (Optical Soc. America) 4, 5. New results in atomic FT spectroscopy and applications to HST.
  7. Kalus,G., Johansson,S., Thorne,A.P., Leckrone,D.S., Wahlgren,G.M.: 1995, in Sauval,A.J., Blomme,R., Grevesse,N. (eds) "Laboratory and Astronomical High Resolution Spectra" ASP Conf. Series 81, Isotope shift in Pt II observed in laboratory FTS spectra.
  8. Nave.,G., Johansson,S.: 1995, in Sauval,A.J., Blomme,R., Grevesse,N. (eds) "Laboratory and Astronomical High Resolution Spectra" ASP Conf. Series 81, 197. Analysis of high-resolution laboratory spectra of iron and identification of Fe I lines in the solar spectrum.
  9. Schoenfeld,W.G., Chang,E.S., Geller,M., Johansson,S., Nave,S., Saval,A.J., Grevesse,N.: 1995, AA 301, 593. High excitation Rydberg levels of Fe I from the ATMOS solar spectrum at 2.5 and 7 micrometers.
  10. Wahlgren, G.M., Leckrone,D.S., Johansson,S.G., Rosberg,M., Brage,T.: 1995, ApJ. 444, 438. The abundance of Pt, Au and Hg in the chemically peculiar HgMn - type stars kappa Cnc and chi Lupi.
  11. Zapadlik,I., Johansson,S., Litzén,U.: 1995, "Laboratory and Astronomical High Resolution Spectra", eds Sauval,A.J., Blomme,R., Grevesse,N., ASP Conf. Series 81, 237. Improved wavelengths and extended analysis of Ti II.
  12. Edvardsson,B., Gustafsson,B., Johansson,S., Kiselman,D., Lambert,D.L., Nissen,P.E., Gilmore,G.: 1994, AA. 290, 176. Boron in the extreme Pop II star HD 140283 and the production of light elements in the early galaxy.
  13. Hamann,F., DePoy,D.L., Johansson,S., Elias,J.: 1994, ApJ. 422, 626. High resolution 6450 to 24500 Ĺ spectra of eta Carinae.
  14. Johansson,S., Nave,G., Geller,M., Sauval,A.J., Grevesse,N.: 1994, in Rabin,D.M. et al (eds), "Infrared solar physics", IAU Symp. 154, p. 543. Analysis of very high excitation Fe I lines (4g-5g) in the solar infrared spectrum.
  15. Johansson,S., Joueizadeh,A., Litzén,U., Larsson,J., Persson,A., Wahlström,C-G., Svanberg,S., Leckrone,D.S., Wahlgren,G.M.: 1994, ApJ. 421, 809. Comparison of new experimental and astrophysical f-values for some Ru II lines, observed in HST spectra of chi Lupi.
  16. Johansson,S., Nave,G., Geller,M., Sauval,A.J., Grevesse,N., Schoenfeld,W.G., Chang,E.S., Farmer,C.B.: 1994, ApJ. 429, 419. Analysis of the 3d64s(6D)4f-5g super-multiplet of Fe I in laboratory and solar infrared spectra.
  17. Johansson,S., Leckrone,D.S., Wahlgren,G.M.: 1994, Astronomisk Tidskrift 27, 113. UV-spektra frĺn Hubble-teleskopet avslöjar en stjärna i Vargen som lagrar tunga isotoper av mycket tunga grundämnen.
  18. Jönsson,P., Johansson,S., Ch. Froese Fischer: 1994, ApJ. 429, L45. Accurate calculation of the isotope shift and hyperfine structure in the boron (B II) line at 1362 Ĺ.
  19. Leckrone,D.S., Johansson,S., Kalus,G., Wahlgren,G.M., Brage,T.: 1994, B.A.A.S. 26, 869. HST/GHRS observations of Tl II (Z=81) in the ultraviolet spectrum of the HgMn star, chi Lupi.
  20. Lundberg,H., Litzén,U., Johansson,S.: 1994, Physica Scripta 50, 110. Analysis of the Fourier transform spectrum of Pd II in the 1900-5000 Ĺ region.
  21. Maniak,S.T., Curtis,L.J., Theodosiou,C.E., Hellborg,R., Johansson,S., Martinson,I., Irving,R.E., Beideck,D.J.: 1994, AA. 286, 978. Lifetimes and oscillator strengths for Y III.
  22. Nave,G., Johansson,S., Axner,O., Ljungberg,P., Malmsten,Y., Baschek,B.: 1994, Physica Scripta 49, 581. Analysis of the 3d64s(6D) 6d subconfiguration of Fe I by laser-enhanced ionisation and emission spectroscopy.
  23. Nave,G., Johansson,S., Learner,R.C.M., Thorne,A.P., Brault,J.W.: 1994, ApJS. 94, 221. A new multiplet table for Fe I.
  24. Wahlgren,G.M., Brage,T., Gilliand,R.L., Johansson,S., Leckrone,D.S., Lindler,D.: 1994, B.A.A.S. 26, 869. A glimpse into the Post-COSTAR GHRS: Detections of As II and Bi II in the UV spectrum of the HgMn star chi Lupi.
  25. Wahlgren,G.M., Brage,T., Gilliand,R.L., Johansson,S., Leckrone,D.S., Lindler,D., Litzén,U.: 1994, ApJ. 435, L67. The pursuit of heavy elements in the HgMn - type star chi Lupi: Observations with the GHRS in the COSTAR Era.
  26. Beideck,D.J., Curtis,L.J., Irving,R.E., Maniak,S.T., Hellborg,R., Johansson,S., Joueizadeh,A.A., Martinson,I., Brage,T.: 1993, Phys Rev. A, 47, 884. Lifetimes of 5d96p and 5d86s6p levels in Hg III.
  27. Beideck,D.J., Curtis,L.J., Irving,R.E., Maniak,S.T., Hellborg,R., Johansson,S., Martinson,I., Rosberg,M.: 1993, J.Opt.Soc.Am. B 10, 977. Lifetimes of 5d96p levels in Au II.
  28. Hamann,F.W., Ferland,G., Johansson,S.: 1993, Bull. AAS 24, 1174. Lyman alpha pumping of Fe II in Quasars and AGN.
  29. Johansson,S., Hamann,F.W.: 1993, Physica Scripta T47, 157. Fluorescence lines in ultraviolet spectra of stars.
  30. Johansson,S., Litzén,U., Kasten,J., Koch,M.: 1993, ApJ. 403, L25. A 25 mĹ isotope shift in B I at 2090 Ĺ: A possible diagnostic of the cosmic 11B/10B ratio?
  31. Wahlgren,G.M., Johansson,S., Kurucz,R.L., Leckrone,D.S.: 1993, BAAS. (183, 1806) A GHRS/HST Spectral Atlas of Sirius-A.
  32. Johansson,S., Litzén,U.: 1993, in Sugar,J., Leckrone,D. (eds) NIST Spec.Publ. 850, 56. Work in progress at the Lund VUV-FTS.
  33. Johansson,S., Joueizadeh,A., Litzén,U., Larsson,J., Persson,A., Svanberg,S., Wahlström,C.G., Leckrone,D.S., Wahlgren,G.M.: 1993, in Sugar,J., Leckrone,D. (eds) NIST Spec.Publ. 850, 86. Ruthenium stellar abundance determined from FTS branching ratios, LIF lifetimes and HST observations.
  34. Joueizadeh,A., Johansson,S.: 1993, in Sugar,J., Leckrone,D. (eds) NIST Spec.Publ. 850, 131. A progress report on the analysis of VUV-FTS spectra of Ru I and Ru II.
  35. Leckrone,D.S., Johansson,S., Wahlgren,G.M., Adelman,S.J.: 1993, Physica Scripta T47, 149. High resolution UV stellar spectroscopy with the HST/GHRS challenges and opportunities for atomic physics.
  36. Leckrone,D.S., G.M. Wahlgren, Se. Johansson and S.J. Adelman: 1993, in Dworetsky,M.M., Castelli,F., Faraggiana,R. (eds) Proc. IAU Coll. 138, (San Fransisco, Astr. Soc. Pacific), p.42, Exploring abundance and isotope anomalies in Cp stars with the HST/GHRS: High resolution UV spectroscopy of chi Lupi.
  37. Nave,G., Johansson,S.: 1993, AA. 274, 961. Highly-excited levels of Fe I obtained from laboratory and solar Fourier transform and grating spectra, I: Energy Levels.
  38. Nave,G., Johansson,S.: 1993, AAS. 102, 269. Highly-excited levels of Fe I obtained from laboratory and solar Fourier transform and grating spectra, II: Laboratory and solar identifications.
  39. Nave,G., Johansson,S.: 1993, in Sugar,J., Leckrone,D. (eds) NIST Spec.Publ. 850, 128. New energy levels in Fe I observed in FTS spectra.
  40. Rosberg,M., Litzén,U., Johansson,S.: 1993, in Sugar,J., Leckrone,D. (eds) NIST Spec.Publ. 850, 102. Experimental isotopic shifts in Ni II and Fe II.
  41. Rosberg,M., Litzén,U., Johansson,S.: 1993, MNRAS. 262, L1. Experimental isotopic shifts in Ni II and Fe II.
  42. Uylings,P.H.M., Raassen,A.J.J., Joueizadeh,A.A., Ekberg,J.O., Johansson,S., Wyart,J.F.: 1993, in Sugar,J., Leckrone,D. (eds) NIST Spec.Publ. 850, 13. gf-values for transitions in the 5d10+5d96s+5d86s2 - 5d96p+5d86s6p transition array of Hg III.
  43. Wahlgren,G.M., Leckrone,D.S., Johansson,S.: 1993, in Sugar,J., Leckrone,D. (eds) NIST Spec.Publ. 850, 88. Investigating the Pt III spectrum in chemically peculiar stars.
  44. Wahlgren,G.M., Leckrone,D.S., Johansson,S., Rosberg,M.: 1993, in Dworetsky,M.M., Castelli,F., Faraggiana,R. (eds) Proc. IAU Coll. 138, (San Fransisco, Astr. Soc. Pacific), Using HST/GHRS echelle spectra as templates for IUE data analysis.
  45. Johansson,S., Litzén,U., Leckrone,D.S., Wahlgren,G.M.: 1992, Opt.Soc. of America, Technical Digest Ser.Vol 21, 52. The need for FTS accuracy in the analysis of complex laboratory and stellar spectra.
  46. Johansson,S., Litzén,U., Kasten,J., Kock,M.: 1992, Opt.Soc. of America, Technical Digest Ser.Vol 21, 31. Isotope shift in B I at 2090 Ĺ as a probe of cosmic nucleosynthesis.
  47. Litzén,U., Johansson,S.: 1992, Opt.Soc. of America, Technical Digest Ser.Vol 21, 93. Work in progress at the Lund VUV-FTS.
  48. Rosberg,M., Johansson,S.: 1992, Physica Scripta 45, 590. Analysis of a 4f-5g supermultiplet of Fe II around 1 micrometer.
  49. Rosberg,M., Litzén,U., Johansson,S.: 1992, Opt.Soc. of America, Technical Digest Ser.Vol 21, 34. Experimental Isotope shifts in Ni II and Fe II.
  50. Feibelman,W.A., Bruhweiler,F.C., Johansson,S.: 1991, ApJ. 373, 649. Ultraviolet high-excitation Fe II fluorescence lines excited by O VI, C IV and H I resonance emission as seen in IUE spectra.
  51. Leckrone,D.S., Johansson,S., Wahlgren,G.M.: 1991, BAAS (23, 1378) Abundances of trace elements from HST/GHRS echelle spectra of the chemically peculiar B star chi Lupi.
  52. Johansson,S., Nave,G., Learner,R.C.M., Thorne,A.P.: 1991, in Jaschek,C., Andrillat,Y. (eds) "The infrared spectral region of stars", (Cambridge University Press) New identifications of highly-excited Fe I lines around 4 mircometers in cool stars.
  53. Johansson,S., Rosberg,M., Hamann,F.: 1991, in Jaschek,C., Andrillat,Y. (eds) "The infrared spectral region of stars", (Cambridge University Press) p. 107, Identification of new 14 eV Fe II lines in the near-infrared spectrum of LkHalpha 101,
  54. Johansson,S.: 1991, in Jaschek,C., Andrillat,Y. (eds) "The infrared spectral region of stars", (Cambridge University Press) p.87, High-resolution atomic spectroscopy in the infrared and its application to astrophysics.
  55. Johansson,S., Nave,G., Learner,R.C.M., Thorne,A.P.: 1991, in Jaschek,C., Andrillat,Y. (eds) "The infrared spectral region of stars", (Cambridge University Press) p.189, New identifications of highly-excited Fe I lines around 4 mircometers in cool stars.
  56. Leckrone,D.S., Wahlgren,G.M., Johansson,S.: 1991, ApJ. 377, L37. First results from the Goddard high-resolution spectrograph: High-resolution observations of the 1942 Ĺ resonance line of Hg II in the chemically peculiar B star, chi Lupi.
  57. Leckrone,D.S., Johansson,S., Wahlgren,G.M.: 1991, in Kinney,A.L., Blades,J.C. (eds) "The first year of HST observations", (The space Telescope Science Institute, Baltimore, MD, USA) p. 83, High resolution UV spectroscopy of the chemically peculiar B-star, chi Lupi,
  58. Nilsson,A.E., Johansson,S., Kurucz,R.L.: 1991, Physica Scripta 44, 226. The spectrum of singly ionized yttrium, Y II.
  59. Baschek,B., Johansson,S.: 1990, J.Quant.spectrosc.Radiat.Transfer 44, 215. Fe II lines from laboratory and astrophysical sources.
  60. Gimenez,A., Gonzalez-Riestra,R.G., Edward,F., Kondo,Y., McCluskey,G., Bradstreet,D.H., McCook,G.P., Dorren,J.D., Johansson,S., Sahade,J.: 1990, in ESA, Evolution in Astrophysics: IUE Astronomy in the Era of New Space Missions p.383, Gas dynamics, accretion, and evolution of Algols: Initial results for three representative systems.
  61. Johansson,S., Learner,R.C.M.: 1990, ApJ. 354, 755. The lowest 3d6 4s4f subconfiguration of Fe I determined from laboratory and solar Fourier transform spectra in the infrared.
  62. Johansson,S.: 1990, in Hansen,J.E. (ed) "Atomic Spectra and Oscillator Strengths for Astrophysics and Fusion Research", (North Holland, Amsterdam) p.13, The iron group elements and the "missing" opacity in ultraviolet and optical spectra of stars.
  63. Johansson,S.: 1990, Atomic.Mol. Physics vol. XXIV, 159. Atomic spectra and oscillator strengths for astrophysics and fusion, Comments.
  64. Johansson,S.: 1990, in Wallerstein,G. (ed) "Cool Stars, Stellar Systems and the Sun", Astr. Soc. Pacific Conf. Series vol 9, 307. Interpretation of infrared emission lines.
  65. Leckrone,D.S., Johansson,S., Kurucz,R.L., Adelman,S.J.: 1990, in Hansen,J.E. (ed) "Atomic Spectra and Oscillator Strengths for Astrophysics and Fusion Research", (North Holland, Amsterdam) p.3, High resolution ultraviolet spectroscopy from space observatories - what Atomic Physics and Astrophysics can do for each other.
  66. Nilsson,A.E., Johansson,S.: 1990, in Hansen,J.E. (ed) "Atomic Spectra and Oscillator Strengths for Astrophysics and Fusion Research", (North Holland, Amsterdam) p.200, The 4d4f configuration in Y II,
  67. Sorensen,S.L., Olsson,B.J., Widlund,O., Huldt,S., Johansson,S., Källne,E., Nilsson,A.E., Hutton,R. Litzén,U., Svensson,A.: 1990, Nucl. Instr. Meth.Phys. Res. A297, 296. A normal-incidence beam line at the Max storage ring.
  68. Baschek,B., Johansson,S.: 1988, in Viotti,R. et al (eds) "Physics of Formation of Fe II Lines Outside LTE", p.35, New laboratory recordings of Fe II in the IUE region.
  69. Brown,C.M., Ginter,M.L., Johansson,S., Tilford,S.G.: 1988, J.Opt.Soc.Am. B5, 2125. Absorption spectra of Fe I in the 1550-3215 Ĺ region.
  70. Carpenter, K.G., Pesce,J.E., Stencel,R.E., Brown,A., Johansson,S., Wing,R.F.,: 1988, ApJS. 68, 345. The ultraviolet spectrum of noncoronal late-type stars: The Gamma Crucis (M3.4 III) reference spectrum.
  71. Carpenter, K.G., Johansson,S.: 1988, in "A Decade with UV Astronomy with IUE", Proc. Celebratory Symposium, GSFC, Greenbelt, USA, ESA SP-281, Vol. 1, p. 349. Fluorescence processes and line identification in the VUV spectra of cool stars.
  72. Johansson,S., Baschek,B.: 1988, Nucl.Instr.Methods B31, 222. Term analysis of complex spectra: New experimental data for Fe II.
  73. Johansson,S.: 1988, ApJ. 327, L85. Indirect IUE observation of O VI from photoexcited fluorescence lines of Fe II, present in the spectrum of RR telescopii.
  74. Johansson,S., Carpenter,K.G.: 1988, in "A Decade with UV Astronomy with IUE", Proc. Celebratory Symposium, GSFC, Greenbelt, USA, ESA SP-281, Vol. 1, p. 361., (see also) Identification of new fluorescence processes in the UV spectra of cool stars from new energy levels of Fe II and Cr II.
  75. Johansson,S.: 1988, in Viotti,R. et al (eds) "Physics of Formation of Fe II Lines Outside LTE", p.13, The laboratory spectrum and atomic structure of Fe II.
  76. Johansson,S., Hansen,J.E.: 1988, in Viotti,R. et al (eds) "Physics of Formation of Fe II Lines Outside LTE", p.235, On the excitation of the Fe II multiplet UV 191 in stellar spectra.
  77. Johansson,S.: 1988, in Viotti,R. et al (eds) "Physics of Formation of Fe II Lines Outside LTE", p.313, Future laboratory work on Fe II.
  78. Johansson,S., Cowley,C.R.: 1988, J. Opt. Soc. Am B5, 2264. Complex atoms in astrophysical spectra.
  79. Adam,J., Baschek,B., Johansson,S., Nilsson,A.E., Brage,T.: 1987, ApJ. 312, 337. Ultraviolet doubly excited Fe II lines in the laboratory and in the A-type star 21 Pegasi.
  80. Brage,T., Nilsson,A.E., Johansson,S., Baschek,B., Adam,J.: 1987, J.Phys. B20, 1153. Accidental degeneracy of doubly excited states in Fe II.
  81. Johansson,S.: 1987, Physica Scripta 36, 99. On regularities in complex spectra of iron group elements and their dominance in stellar spectra.
  82. Cowley,C.R., Johansson,S.: 1986, in Cowley,C. (ed) "Upper Main Sequence Stars with Anomalous Abundances", Proc. of the IAU Coll 90. p.91, Practical problems in the analysis of CP stars.
  83. Forsberg,P., Johansson,S., Smith,P.L.: 1986, Physica Scripta 34, 759. The absorption spectrum of titanium between 1900 Ĺ and 2315 Ĺ.
  84. Johansson,S., Cowley,C.R.: 1986, in Cowley,C. (ed) "Upper Main Sequence Stars with Anomalous Abundances", Proc. of the IAU Coll 90. p.99, Missing atomic levels and lines of astrophysical importance.
  85. Johansson,S., Hansen,J.E.: 1986, in Viotti,R. (ed) "Physics of Formation of Fe Lines Outside LTE", Proc. of the IAU Coll No 94 (Reidel). On the excitation of the Fe II multiplet UV 191 in stellar spectra.
  86. Short,R.T., O,C.-S., Levin,J.C., Sellin,I.A., Liljeby,L., Huldt,S., Johansson,S., Nilsson,A.E., Church,D.A.: 1986, Phys.Rev.Lett. 56, 2614. Production of very-low-energy highly charged ions by synchrotron radiation.
  87. Johansson,S.: 1984, Physica Scripta T8, 63. A comparison between the observed and predicted Fe II spectrum in different plasmas.
  88. Johansson,S.: 1984, Proc. 4th European IUE Conf. ESA SP-218, 307. New Fe II lines in IUE spectra of stars.
  89. Johansson,S., Jordan,C.: 1984, MNRAS. 210, 239. Selective excitation of Fe II in the laboratory and late type stellar atmospheres.
  90. Johansson,S., Cowley,C.R.: 1984, AA. 139, 243. The identification of high-level transitions of Fe II in stellar spectra.
  91. Ekberg,J.O., Engström,L., Bashkin,S., Denne,B., Huldt,S., Johansson,S., Jupén,C., Litzén,U., 1983, Physica Scripta 27, 425. Trigueiros,A., Martinson,I.: Accurate experimental lifetimes of excited levels in sodiumlike sulfur, S VI.
  92. Johansson,S.: 1983, MNRAS. 205, 71 P. Strong Fe II fluorescence lines in RR Tel and V 1016 Cyg excited by C IV and a Bowen mechanism.
  93. Johansson,S.: 1983, Litet Ordo 3, 6. Atomers och stjärnors spektra.
  94. Johansson,S.: 1982, MNRAS. 201, 63P. Two Cr II multiplets around 1430 Ĺ appearing in absorption in the spectrum of a solar active region.
  95. Johansson,S.: 1982, Transactions of the IAU vol. XVIIIB, P. 124-131, Proc. of the eighteenth General Assembly, Patras. Recent results on the spectrum of Cr II with astrophysical applications.
  96. Huldt,S., Johansson,S., Litzén,U., Wyart,J.-F.: 1982, Physica Scripta 25, 401. The spectrum and term system of singly ionized titanium, Ti II.
  97. Johansson,S.: 1981, Space Science Rev. 29, 387. Atomic spectroscopy for astrophysical applications.
  98. Johansson,S., Litzén,U., Lundin,L., Mannervik,S.: 1981, Physica Scripta 24, 30. Beam-foil lifetime measurements of some Fe II energy levels.
  99. Johansson,S., Litzén,U., Sinzelle,J., Wyart,J.-F.: 1980, Physica Scripta 21, 40. An iso-ionic study of excited configurations in singly ionized iron-group elements.
  100. Johansson,S., Litzén,U.: 1980, Physica 22, 49. The spectrum of singly ionized scandium, Sc II.
  101. Johansson,S., Litzén,U.: 1980, J. Phys. B: Atom. Molec. Phys. 13, L253. Possibilities of obtaining laser action from singly ionized iron group elements through charge transfer in hollow cathode lasers.
  102. Johansson,S.: 1980, Phys. Education 15, 242. An experimental study of atomic processes in helium.
  103. Jordan,C., Judge,P., Johansson,S.: in Doschek (ed), Proc. IAU Symposium 84. Ultraviolet spectroscopy of cool stars from IUE.
  104. Johansson,S.: 1978, Physica Scripta 18, 217. The spectrum and term system of Fe II.
  105. Johansson,S.: 1978, MNRAS. 184, 593. Absorption lines in Sgr identified as high-level transitions of Fe II.
  106. Johansson,S., Litzén,U.: 1978, J. Phys. B: Atom. Molec. Phys. 11, L703. Observations of charge transfer reactions through enchancement of spectral lines.
  107. Johansson,S.: 1977, MNRAS. 178, 17P. New Fe II identifications in the infrared spectrum of Eta Carinae.
  108. Johansson,S.: 1977, ApJ. 212, 923. Newly identified Fe II lines in the solar limb spectrum.
  109. Johansson,S.: 1977, Physica Scripta 15, 183. Forbidden transitions of Fe II.
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