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FORSCHUNGSBERICHT 1996-1998


 

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Sternwarte

Allgemeine Angaben:
Auf dem Hügel 71, 53121 Bonn, Telefon: 0228 / 73-3655, Telefax: 0228 / 73-3672, eMail: username@astro.uni-bonn.de, WWW: http://www.astro.uni-bonn.de/~webstw

Hauptamtliche Professoren
Prof. Dr. Peter Brosche
Prof. Dr. Klaas S. de Boer

Wissenschaftliches Personal
Universitätsstellen
AOR Dr. Robert Breinhorst
AOR Dr. Michael Geffert
Prof. Dr. em. Edward H. Geyer
Dr. Günther Lay
Dr. Klaus Reif
PD Dr. Tom Richtler
Prof. Dr. em. Hans Schmidt
Dr. Jörg Schumann
Apl. Prof. Dr. Wilhelm Seggewiss

Drittmittelstellen
Dipl.Math. Yolanda Aguilar Sanchez (DFG)
Dipl.Phys. Martin Altmann (DFG)
Dipl.Phys. Klaus Bagschik (BMBF)
Dipl.Phys. Ralph Kohley (BMBF)
Dipl.Phys. Philipp Richter (DLR)
Dipl.Math. Jörg Sanner (NRW)
Dr. Oliver Schwarz (DFG)

Stipendiaten
Dipl.Phys. Jochen M. Braun (DFG)
Dipl.Phys. Andrea Dieball (DFG)
Dilp.Phys. Boris Dirsch (DFG)
Dipl.Phys. Eva K. Grebel (DFG)
Dipl.Phys. Michael Hilker (DFG)
Dipl.Phys. Markus Kissler-Patig (DFG)

Forschungsschwerpunkte
Erdrotation, Referenzsysteme
(Brosche, Schwarz)

Horizontalaststerne und deren Kinematik, Wolf-Rayet-Sterne
(de Boer, Altmann, Cordes, Seggewiss)

Struktur der Galaxis, Struktur der Magellanschen Wolken
(de Boer, Altmann, Geffert, Richter, Richtler, Seggewiss)

Interstellares Gas in der Galaxis und in den Magellanschen Wolken
(de Boer, Richter)

Offene Sternhaufen und Kugelsternhaufen, stellare Populationen
(Geffert, Dieball, Sanner, Richtler, Braun)

Entwicklung opto-elektronischer Messgeräte für Teleskope
(Reif, Bagschik, Kohley)

Struktur von Galaxien und Galaxienhaufen
(Richtler, Dirsch, Hilker, Kissler-Patig)

Besondere Forschungsförderung
DFG Graduiertenkolleg: Die Magellanschen Wolken und andere Zwerggalaxien
(de Boer, Braun, Dieball, Dirsch, Hilker, Kissler-Patig, Richtler, Seggewiss, )

Veröffentlichungen
Bauer T., Weghorn H., Grebel E.K., Bomans D.J.,:
The young star cluster R 64 in the OB association LH9 resolved with ground-based CCD observations
1996, Astron. & Astrophys. 305, 135-139;

Bomans D.J., de Boer K.S., Koornneef J., Grebel E.K.,:
C IV absorption from hot gas inside supergiant shell LMC 4 observed with HST and IUE
1996, Astron. & Astrophys. 313, 101-112

Braun J.M., Bomans D.J., Will J.-M., de Boer K.S.,:
No stellar age gradient inside supergiant shell LMC 4
1997, Astron. & Astrophys. 328, 167-174

Brosche P., Dick W.R., Odenkirchen M.,:
GAIA für Gäa? - Zur geowissenschaftlichen Nutzung eines geplanten Astrometrie-Satelliten
1996, Z. Vermessungswesen 121, 577-580;

Brosche P., Dick W.R., Schwarz O., Wielen R., (Editors),:
The Message of the Angles - Astrometry from 1798 to 1998
1998, Proc. Int. Spring Meeting of the Astron. Gesellschaft, Gotha, 11 - 15 May, 1998; Verlag Harri Deutsch, Thun und Frankfurt a.M., ISBN 3-8171-1588-1 = Acta Historica Astronomiae 3, 276 pages

Brosche P., Maier-Reimer E., Segschneider J., Sündermann J., Wünsch J.,:
The axial angular momentum of the general circulation of the oceans
1997, Astron. Nachr. 318, 193-199;

Brosche P., Seiler U.,:
Oceanic and solid Earth angular momentum
1996, Astron. Nachr. 317, 211 und 423

Brosche P.,:
Astronomie der Goethezeit. Textsammlung aus Zeitschriften und Briefen Franz Xaver von Zachs
1996, Ostwalds Klassiker der exakten Wissenschaften, Band 280, Verlag Harri Deutsch, Thun und Frankfurt a.M., ISBN 3-8171-3280-8

Brosche P.,:
Laplace schreibt nach Gotha
1997, Berichte zur Wissenschaftsgeschichte 20, 306-308;

Cassatella A., Barbero J., Broccato E., Castellani V., Geyer E.H.,:
Ultraviolet ages of young clusters in the Magellanic Clouds
1996, Astron. & Astrophys. 306, 125-133

Dauphole B., Geffert M., Colin J., Ducourant C., Odenkirchen M.,, Tucholke H.-J.,:
The kinematics of globular clusters, apocentric distances and a halo metallicity gradient
1996, Astron. & Astrophys. 313, 119-128

de Boer K.S., Aguilar Sanchez Y., Altmann M., Geffert M., Odenkirchen M.,, Schmidt J.H.K., Colin J.,:
Hot subdwarf stars: orbits and distibution perpendicular to the plane
1997, Astron. & Astrophys. 327, 587-597

de Boer K.S., Braun J.M., Vallenari A., Mebold U.,:
Bow-shock induced star formation in the LMC?
1998, Astron. & Astrophys. 329, L49-L52

de Boer K.S., Richter P., Bomans D.J., Heithausen A., Koornneef J.,:
ORFEUS II echelle spectra: Absorption by H<sub>2</sub> in the LMC.
1998, Astron. & Astrophys. 338, L5-L8

de Boer K.S., Tucholke H-.J., Schmidt J.H.K.,:
Calibrating horizontal-branch stars with Hipparcos
1997, Astron. & Astrophys. 317, L23-L26

Dieball A., Grebel E.K.,:
The cluster pair SL 538 / NGC 2006 (SL 537).
1998, Astron. & Astrophys. 339, 773-781;

Dietrich M., Altmann M., Braun J.M., Geffert M., Kuemmel M., Schmoll J., et al.,:
Steps toward Determination of the Size and Structure of the Broad-LineRegion in Active Galactic Nuclei. XII. Ground-based Monitoring of 3C 390.3.
1998, Astrophys. J. Suppl. 115, 185-202;

Domgörgen H., Dahlem M., Dettmar R.-J.,:
What perturbs NGC 2188?
1996, Astron. & Astrophys. 313, 96-100

Domgörgen H., Dettmar R.-J.,:
On the ionization of the diffuse ionized gas: Spectroscopy of NGC 188
1997, Astron. & Astrophys. 322, 391-399

Ducourant C., Dauphole B., Rapaport M., Colin J., Geffert M.,:
Wide field search for nearby faint stars.
1998, Astron. & Astrophys. 333, 882-892;

Fischer P., Mateo M., Pryor C., Murray S., Richtler T.,:
Mass Segregation in young Magellanic Cloud clusters. I. NGC 2157.
1998, Astron. J. 115, 592-604;

Geffert M., Aurère M., Koch-Miramond L.,:
Astrometry of the globular cluster 47 Tucunae and possible opticalidentification of X-ray sources
1997, Astron. & Astrophys. 327, 137-144

Geffert M., Bonnefond P., Maintz G., Guibert J.,:
The astrometric accuracy of `Carte du Ciel' plates and proper motions in the field of the open cluster NGC 1647
1996, Astron. & Astrophys. Suppl. 118, 277-282

Geffert M., Klemola A.R., Hiesgen M., Schmoll J.,:
Absolute proper motions for the calibration of the Hipparcosproper motion system
1997, Astron. & Astrophys. Suppl. 124, 157-161

Geffert M.,:
Hipparcos based astrometric analysis of M 3 and M 92 fields: optical identification of X-ray and radio sources, space motions of globular cluster M 3 and M 92 and a galactic orbit of the sdB star PG 1716+426.
1998, Astron. & Astrophys. 340, 305-308;

Geyer E.H., Jockers K., Kiselev H.N., Chernova G.P.,:
A novel quadruple beam imaging polarimeter and its application to comet Tanaka-Machholz 1992
1996, Astrophys. Space Sci. 239, 259-274

Golla G., Dettmar R.-J., Domgörgen H.,:
Long-slit spectra of extraplanar diffuse ionized gas in NGC 4631
1996, Astron. & Astrophys. 313, 439-447

Gonzales R.A., Allen R.J., Dirsch B., Ferguson H.C., Calzetti D., Panagia N.,:
The Opacity of Nearby Galaxies from Colors and Counts of Background Galaxies. I. The Synthetic Field Method and Its Application to NGC 4536 and NGC 3664.
1998, Astrophys. J. 506, 152-176;

Gosteli L., Boschung U., Brosche P.,:
Franz Xaver von Zachs Briefe an Rudolf Abraham von Schiferli 1821-1832.
1998, Gesnerus Supplementum 45, Schwabe & Co AG Verlag Basel, 382 Seiten

Grebel E.K., Roberts Wm J., Brandner W.,:
On the nature of the blue giants in NGC 330
1996, Astron. & Astrophys. 311, 470-483

Hilker M., Bomans D.J., Kissler-Patig M., Infante L.,:
NGC 1427A - an LMC type galaxy in the Fornax Cluster
1997, Astron. & Astrophys. 327, 562-568

Hilker M., Kissler-Patig M.,:
The globular cluster system of an `old' merger: NGC 5018
1996, Astron. & Astrophys. 314, 357-367

Kissler-Patig M., Kohle S., Hilker M., Richtler T., Infante L., Quintana H.,:
Globular cluster systems of early-type galaxies in Fornax
1997, Astron. & Astrophys. 319, 470-480

Kissler-Patig M., Richtler T., Della Valle M., Storm J.,:
Halo and bulge/disk globular clusters in the S0/Sa galaxy NGC 1380
1997, Astron. & Astrophys. 327, 503-512

Kissler-Patig M., Richtler T., Hilker M.,:
The elliptical globular cluster system of NGC 720
1996, Astron. & Astrophys. 308, 704-712

Kissler-Patig M.,:
The dichotomy of early-type galaxies from their globular cluster systems
1997, Astron. & Astrophys. 319, 83-91

Kohle S., Kissler-Patig M., Hilker M., Richtler T., Infante L., Quinta H.,:
The distance of the Fornax Cluster based on Globular ClusterLuminosity Functions
1996, Astron. & Astrophys. 309, L 39-42

Kokott W.,:
Syzygies as Pivots; An unusual mid-15th century working ephemeris.
1998, J. Hist. Astronomy 29, 129-135;

Komarek K., Troll K., Sanner J., Vanscheidt R.,:
Positions of comets 121P/Shoemaker-Holt 2 and 81P/Wild 2.
1998, The Minor Planet Circulars 32570, eds. B.Marsden, G.V.Williams, S.Nakano;

Kovalevsky J., Lindegren L., ..., Tucholke H.-J., Brosche P., et al.,:
The Hipparcos Catalogue as a realisation of the extragalactic reference system
1997, Astron. & Astrophys. 323, 620-633

Le Campion J.-F., Colin J., Geffert M.,:
M15, an astrometric standard for CCD observations
1996, Astron. & Astrophys. Suppl. 119, 307-320

Liebscher D.E., Brosche P.,:
Aberration and relativity.
1998, Astron. Nachr. 319, 309-318;

Magnusson P., .... Geyer E.H., Bauer T., Hoffmann M., et al.,:
Photometric Observations and Modeling of Asteroid 1620 Geographos
1996, Icarus 123, I, 227-244

Marchenko S.V., Moffat A.F.J., Eversberg T., Hill G.M., Tovmassian, G.H., Morel T., Seggewiss W.,:
A comprehensive variability study of the enigmatic WN8 stars: final results.
1998, MNRAS 294, 642-656;

Marchenko S.V., Moffat A.F.J., van der Hucht K.A., Seggewiss W., Schrijver H., Stenholm B., Lundström I., Setia Gunawan D.Y.A., Sutantyo W., van den Heuvel E.P.J., De Cuyper J.-P., Gomez A.E.,:
Wolf-Rayet stars and O-star runaways with HIPPARCOS. II. Photometry.
1998, Astron. & Astrophys. 331, 1022-1036;

Minniti D., Meylan G., Kissler-Patig M.,:
Globular cluster halos around dwarf elliptical galaxies
1996, Astron. & Astrophys. 312, 49-54

Moffat A.F.J., Marchenko S.V., Bartzakos P., Niemela V.S., Cerruti M.A.,, Magalhaes A.M., Balona L., St-Louis N., Seggewiss W., Lamontagne R.,:
The Luminous Eclipsing SMC OB+WN Binary HD 5980 before and during the Recent LBV-like Outburst: An Extreme Case of Colliding Winds.
1998, Astrophys. J. 497, 896-911;

Moffat A.F.J., Marchenko S.V., Seggewiss W., van der Hucht K.A.,, Schrijver H., Stenholm B., Lundstr"om I., Setia Gunawan D.Y.A.,, Sutantyo W., van den Heuvel E.P.J., De Cuyper J.-P., Gomez A.E.,:
Wolf-Rayet stars and O-star runaways with HIPPARCOS. I. Kinematics.
1998, Astron. & Astrophys. 331, 949-958;

Odenkirchen M., Brosche P., Börngen F., Meusinger H., Ziener R.,:
Absolute stellar proper motions with reference to galaxies of the M81 group
1997, Astron. & Astrophys. Suppl. 124, 189-197

Odenkirchen M., Brosche P., Geffert M., Tucholke H.-J.,:
Globular cluster orbits based on Hipparcos proper motions
1997, New Astron. 2, 477-499

Ortiz-Gil A., Hiesgen M., Brosche P.,:
A new approach to the reduction of `Carte du Ciel' plates.
1998, Astron. & Astrophys. Suppl. 128, 621-630;

Penny A.J., Evans A., Odenkirchen M.,:
A millimetre search for dust in the globular clusters M3 and M22
1997, Astron. & Astrophys. 317, 694-700

Pernechele C., Bortoletto F., Reif K.,:
Hexapod control for an active secondary mirror: general concept and test results.
1998, Applied Optics 37, Nr. 28, 6816-6821;

Richter P., Widmann H., de Boer K.S., Appenzeller I., Barnstedt J.,, Gölz M., Grewing M., Gringel W., Kappelmann N., Krämer G.,, Mandel H., Werner K.,:
ORFEUS II echelle spectra: detection of H<sub>2</sub> absorption in SMC gas.
1998, Astron. & Astrophys. 338, L9-L12;

Richtler T., Braun J.M., (Editors),:
The Magellanic Clouds and Other Dwarf Galaxies.
1998, Proceedings of the conf. of the Bonn-Bochum Graduiertenkolleg, 19.-22.01.1998, Bad Honnef; Shaker Verlag, Aachen, ISBN 3-8265-4457-9, 338 pages;

Richtler T., Grebel E.K., Subramaniam A., Sagar R.,:
VI photometry of metal-rich globular clusters: NGC 6528.
1998, Astron. & Astrophys. 127, 167-179;

Sanner J., Hainaut O.R., Böhnhardt H., Rauer H., West R.M., Jorda L.,, Schwehm G., Thomas N., Schulz R., Tozzi G.-P., Cremonese G., Rembor K.,:
79 Positions for Comet 46P/Wirtanen
1997, The Minor Planet Circ. 30125f

Sanner J.,:
48 Positions for Comet C/1995 O1 (Hale-Bopp)
1997, The Minor Planet Circ. 28912

Sanner J.,:
Positions of comet C/1997 J2 (Meunier-Dupouy).
1998, The Minor Planet Circulars 32130, eds. B.Marsden, G.V.Williams, S.Nakano;

Schmidt J.H.K., de Boer K.S., Heber U., Moehler S.,:
PG 0009+036: A rapidly rotating normal B star in the galactic halo
1996, Astron. & Astrophys. 306, L 33-36

Scholz R.D., Odenkirchen M., Hirte S., Irwin M.J., Börngen F., Ziener R.,:
Absolute proper motions and Galactic orbits of M 5, M 12 and M 15
1996, MNRAS 278, 251-264

Schwarz, O., Hopf, C., Stein, H.,:
Quellen zur Astronomie in der Forschungs- und Landesbibliothek Gotha unter besonderer Berücksichtigung der Gothaer Sternwarten.
1998, Veröff. der Forschungs- und Landesbibliothek Gotha, Heft 36, 106 Seiten

Seggewiss W., Richtler T.,:
Star Clusters and Associations
1996, in Landolt-Börnstein, Band VI/3 B, Astronomy and Astrophysics, Springer, Berlin-Heidelberg, p. 303-324

Stark R., Reif K.,:
Surface brightness measurements of extended galactic nebulae.
1998, Pub. Astron. Soc. Australia 15, 86-90;

Stepien K., Geyer E.H.,:
Rotation of solar-like main sequence stars
1996, Astron. & Astrophys. Suppl. 117, 83-91

Tucholke H.-J., Brosche P., Odenkirchen M.,:
he Bonn contribution to the extragalactic link of the Hipparcos proper motion system
1997, Astron. & Astrophys. Suppl. 122, 433-440

Tucholke H.-J., de Boer K.S., Seitter W.C.,:
The Magellanic Cloud catalogue of stars (MACS)
1996, Astron. & Astrophys. Suppl. 119, 91-98

Tucholke H.-J., Scholz R.D., Brosche P.,:
Proper motion study of the globular cluster M 92
1996, Astron. & Astrophys. 312, 74-79

Umbach R., Jockers K., Geyer E.H.,:
Spatial Distribution of Principal Neutral and Ionic Constituents of Comet P/Halley.
1998, Astron. & Astrophys. Suppl., 127, 479-495;

van der Hucht K.A., Schrijver H., Stenholm B., Lundström I., Moffat A.F.J.,, Marchenko S.V., Seggewiss W., Setia Gunawan D.Y.A., Sutantyo W.,, van den Heuvel E.P.J., de Cuyper J.-P., Gómez A.E.,:
The Hipparcos distance determination of the Wolf--Rayet system gamma^2 Velorum (WC8+O) and its ramifications
1997, New Astron. 2, 245-250

Wakker B., van Woerden H., de Boer K.S., Kalberla P.,:
A lower limit to the distance of HVC complex H.
1998, Astrophys. J. 493, 762-774;

Werner K., Bagschik K., Rauch T., Napiwotzki R.,:
A search for planetary nebulae around hot white dwarfs
1997, Astron. & Astrophys. 327, 721-724

Widmann H., de Boer K.S., Richter P., Krämer G., Appenzeller I.,, Barnstedt J., Gölz M., Grewing M., Gringel W., Mandel H., Werner K.,:
ORFEUS II echelle spectra: the scale height of interstellar O VI in the halo.
1998, Astron. & Astrophys. 338, L1-L4;

Will J.-M., Bomans D.J., Dieball A.,:
A photometric and spectroscopic study of the association LH 47 in the superbubble N 44 in the LMC
1997, Astron. & Astrophys. Suppl. 123, 455-471

Will J.-M., Bomans D.J., Vallenari A., Schmidt J.H.K., de Boer K.S.,:
On the spread of ages among the young stars in the LMC association NGC 1948
1996, Astron. & Astrophys. 315, 125-133


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