References of "Swings, Jean-Pierre"
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See detailThe Reflection Nebula Surrounding HD87643
Surdej, Anna ULg; Surdej, Jean ULg; Swings, Jean-Pierre ULg et al

in Astronomy and Astrophysics (1981), 93

Direct plates in narrow bands (H , [0 NI], [S Ii]) and in the broad (B)-band show that the nebula surrounding the nova- like object HD 87643 is of reflective origin. Furthermore, a spectrogram of the ... [more ▼]

Direct plates in narrow bands (H , [0 NI], [S Ii]) and in the broad (B)-band show that the nebula surrounding the nova- like object HD 87643 is of reflective origin. Furthermore, a spectrogram of the filamentary condensation lying east-west at 17" north of HD 87643 reveals strong Balmer emission lines, with a P Cygni structure at H fl H e, as well as many diffuse emission lines of Fe II: such features essentially form a replica of the spectrum of the central object. These results and other arguments strongly support the idea that the reflection nebula surrounding HD 87643 is associated with the mass-outflow observed from the central hot star. Key words: reflection nebula - HD 87643 - mass-loss [less ▲]

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See detailCorrelations between line profile and photometric variations in the B2 IV[e] star HD 45677.
Swings, Jean-Pierre ULg; Barbier, R.; Klutz, M. et al

in Be Star Newsletter (1980), 1

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See detailCorrelations between line-profile and photometric variations in the B 2 IV /e/ star HD 45677
Swings, Jean-Pierre ULg; Klutz, M.; Surdej, Anna ULg et al

in Astronomy and Astrophysics (1980), 90

Abstract image available at: http://esoads.eso.org/abs/1980A&A....90..116S

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See detailSimultaneous Photometry and Spectroscopy of the B2/E Variable Star HD45677
Barbier, R.; Klutz, N.; Surdej, Anna ULg et al

in IAU Colloq. 46: Changing Trends in Variable Star Research (1979)

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See detailObservations of high redshift QSO’s
Swings, Jean-Pierre ULg; Surdej, Jean ULg

in The Messenger (1978), 15

Time-consuming observations with existing large telescopes have shown that the spectra of quasistellar objects are exceedingly complex. A VLT is needed to obtain the highest spectral resolution and to ... [more ▼]

Time-consuming observations with existing large telescopes have shown that the spectra of quasistellar objects are exceedingly complex. A VLT is needed to obtain the highest spectral resolution and to study in detail the numerous absorption lines. Drs. Jean-Pierre Swings (Institut d'Astrophysique in Liege, Belgium) and Jean Surdej (ESO) would like to use their nights to investigate the nature ofsome of the most distant objects in the universe. [less ▲]

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See detailSimultaneous photometry and spectroscopy of the peculiar B [e] star with infrared excess HD45677
Klutz, M.; Surdej, Anna ULg; Surdej, Jean ULg et al

in Kippenhahn, R.; Rahe, J.; Strohmeier, W. (Eds.) THE INTERACTION OF VARIABLE STARS WITH THEIR ENVIRONMENT Proceedings of IAU Colloquium 42 (1977)

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See detailVariations in the U, B, V and u, v, b, Y magnitudes of the peculiar Be star HD 45677
Feinstein, A.; Garnier, R.; Vogt, N. et al

in Astronomy and Astrophysics (1976), 51

Abstract image available at: http://cdsads.u-strasbg.fr/abs/1976A&A....51..269F

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See detailThe complex structure of the Ca II (H and K) lines in the spectrum of the AOep star with infrared excess HD190073
Surdej, Jean ULg; Swings, Jean-Pierre ULg

in Slettebak, A. (Ed.) IAUS 70: Be and Shell Stars (1976)

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See detailThe complex structure of the Ca II (H and K) lines in the spectrum of the A0ep star with infrared excess HD 190073. II. Interpretation: the selective effect of radiative forces.
Surdej, Jean ULg; Swings, Jean-Pierre ULg

in Astronomy and Astrophysics (1976), 47

Abstract image available at: http://esoads.eso.org/abs/1976A&A....47..121S

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See detailObservations photographiques de la comète Kohoutek (1973 f) au grand télescope de Schmidt franco-liégeois
Dossin, P.; Heck, A.; Klutz, M. et al

in Ciel et Terre (1974), 90

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See detailHD 45677 est-elle une étoile variable ?
Swings, Jean-Pierre ULg; Swings, Polydore ULg

in Astronomy and Astrophysics (1972), 17(1), 142-145

Whereas HD 45677 has faded by approximately one magnitude since 1969, the amplitude of variation in photographic magnitude between 1899 and 1969 has always been smaller than 0.3 mag.

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See detailPossibility of Fluorescence Phenomena in the Ultraviolet Spectrum of Symbiotic Stars and Long Period Variables
Swings, Jean-Pierre ULg; Swings, Polydore ULg

in Houziaux, Léo; Butler, H. E. (Eds.) Ultraviolet Stellar Spectra and Related Ground-Based Observations : IAU symposium, held in Lunteren, The Netherlands, 24-27 June, 1969 (1970)

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See detailConsideration of the forbidden lines of iron in the states from Fe0 to Fe6+
Swings, Polydore ULg; Swings, Jean-Pierre ULg

in Mémoires de la Societe Royale des Sciences de Liège (1969), 17

The iron atom which has a fairly high cosmic abundance presents the great interest of appearing in a wide variety of stars and nebulae, at many stages of ionization, and of revealing forbidden transitions ... [more ▼]

The iron atom which has a fairly high cosmic abundance presents the great interest of appearing in a wide variety of stars and nebulae, at many stages of ionization, and of revealing forbidden transitions in emission in many of these ionization stages. The present paper discusses the following topics : (a) the case of the as yet undiscovered forbidden lines of neutral iron (Fe0) ; (b) some recently acquired astronomical information on the forbidden lines of the stages Fe+ to Fe6+ ; (c) general considerations on the important information revealed by these forbidden lines of iron on the physical structure and excitation mechanisms which are present in the emission line stars of early and late types. For lack of time we give only a very summarized version of our paper ; a complete text will appear later. [less ▲]

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See detailConsiderations of the forbidden lines of iron in the states from Fe0 to Fe6+
Swings, Polydore ULg; Swings, Jean-Pierre ULg

in Les Transitions interdites dans les spectres des astres (1969)

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See detailExamples of astronomical needs for atomic spectra.
Swings, Polydore ULg; Swings, Jean-Pierre ULg

in Bashkin, Stanley (Ed.) Beam-Foil Spectroscopy; Volume 1. Proceedings of the conference held at the University of Arizona, USA, November 20-22, 1967 (1968)

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See detailThe emission lines in the ultraviolet region 3140-3500A of CH Cygni, and related problems
Swings, Jean-Pierre ULg; Swings, Polydore ULg

in Astrophysical Letters & Communications (1967), 1

The M6 semi-regular variable CH Cygni had an outburst in June 1967. The emission lines of the ultraviolet region λ< 3500 Å are described. General considerations on the importance of this region are ... [more ▼]

The M6 semi-regular variable CH Cygni had an outburst in June 1967. The emission lines of the ultraviolet region λ< 3500 Å are described. General considerations on the importance of this region are outlined. [less ▲]

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