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FORSCHUNGSBERICHT 1999-2001

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Radioastronomisches Institut

Allgemeine Angaben:
Auf dem Hügel 71, 53121 Bonn
Telefon: 0228 / 73-3658

Hauptamtliche Professoren:
Prof. Dr. Ulrich Klein
Prof. Dr. Ulrich Mebold

Wissenschaftliches Personal:
Universitätsstellen
Dr. Michael K. Bird
Dr. Heiko Hafok
Dr. Andreas Heithausen PD
Dr. Peter Kalberla
Dr. Jürgen Kerp
Dr. Nikolaus Neininger

Drittmittelstellen
Dipl.Phys. Christian Brüns (DFG)
Dipl.Phys. Robindro Dutta-Roy (DLR)
Dr. Thomas Fritz (Grad.Koll. u.SFB 494)
Dott. Gianfranco Gentile (Grad.Koll.)
Dr. Dap Hartmann (SFB 301)
Dr. Susanne Hüttemeister PD (Görres-Gesellschaft)
Cand.Phys. Michael Kappes (DLR)
Dipl.Phys Sven Kohle (Grad.Koll.)
Dipl.Phys. Stefanie Mühle (Grad.Koll.)
Dipl.Phys. Jürgen Ott (Grad.Koll.)
Cand.Phys. Anke Pagels (DLR)
Dipl.Math. Juan Enrique Pradas Simon (DLR)
Dr. Andrea Tarchi (Grad.Koll.)
Dott.essa Daniela Vergani (Grad.Koll.)
Dr. Fabian Walter (Grad.Koll.)
Dr. Axel Weiß (Grad.Koll.u.SFB 494)
Dr. Jan Wouterlout (SFB 301)
Dipl.Phys. Aylin Yar (DAAD)
Dr. Zengyuan Yue (SFB 301)

Forschungsschwerpunkte:
Massereiche Galaxien
(Aalto, Brinks, Dumke, Ehlerova, Falcke, Garrington, Glendenning, Greve, Guelin, Hagiwara, Henkel, Hüttemeister, Kalberla, Kerp, Klein, Lis, Lukas, Mauersberger, Mebold, Moxlow, Neininger, Niethen, Ott, Palous, Peck, Pedlar, Profitlich, Scoville, Sievers, Stutzki, Tarchi, Theis, Ungerechts, Walter, Weiß, Zylka)

Milchstraße und Galaktischer Halo
(Bensch, Bertoldi, Böttner, Brüns, de Heij, Fritz, Heithausen, Henkel, Hopp, Jejakumar, Kalberla, Kerp, Klein, Kramer, Mebold, Pagels, Schulte-Ladbeck, Staveley-Smith, Weiß)

Sonnensystem
(Bird, Dutta-Roy, Hatchell, van der Tak)

Zwerggalaxien
(Böttner, Boriello, Brüns, Fritz, Gentile, Kerp, Klein, Mebold, Mühle, Ott, Salucci, Vergani, Walter, Weiß)

Röntgenstrahlung der Milchstraße und Galaxien
(Brinks, Dahlem, Ehle, Jansen, Kappes, Kerp, Mebold, Ott, Pagels, Pradas, Walter)

Radiogalaxien
(Klein, Mack, Rottmann, Sohn)

Besondere Forschungsförderung:
4-Farben-Kamera für das 2.2-m-Teleskop am Calar Alto
(Reif, Heber, BMFT)

Bonner Weitwinkel-Fläche-Photometer
(Bagschik, Reif, Müller, DLR)

Diagnostik des Sonnenwindes in seinem Entstehungsgebiet
(Bird, Fahr, DFG)

Doppler-Wind Experiment der Cassini-Huygens-Mission
(Allison, Asmar, Atkinson, Bird, Dutta-Roy, Edenhofer, Iess, Taylor, DLR)

Energiebilanz von kalten Wolken in der LMC
(Mebold, DLR)

Gasdynamik im äußeren galaktischen Halo
(Brüns, Mebold, Lesch, DFG)

Graduiertenkolleg 118: Das Magellansche System und andere Zwerggalaxien
(Fritz, Gentile, Klein, Kohle, Mebold, Mühle, Ott, Tarchi, Vergani, Walter, Weiß, DFG)

Sonderforschungsbereich 301: Die Physik und Chemie der interstellaren Molekülwolken
(Hartmann, Heithausen, Klein, Mebold, Neininger, Wouterloot, DFG)

Sonderforschungsbereich 494: Die Entwicklung der interstellaren Materie: Terrahertz-Spektroskopie im Weltall und im Labor
(Fritz, Heithausen, Klein, Mebold, Weiß, DFG)

Untersuchung der heißen Phase des interstellaren Mediums in Zwerggalaxien und der Milchstraße mit XMM-Newton
(Ehle, Jansen, Kappes, Kerp, Pagels, Pradas, Walter, DLR)

Veröffentlichungen:

Aalto, Hüttemeister
Complex molecular gas structure in the Medusa merger
Astron. Astrophys. 362, 42 (2000)

Aalto, Hüttemeister, Scoville, Thaddeus
A New High Resolution CO Map of the inner 2.5' of M51: I Streaming Motions and Spiral Structure
Astrophys. J. 522, 165 (1999)

Barone, Heithausen, Hüttemeister, Fritz, Klein
Molecular gas in blue compact dwarf galaxies
Mon. Not. R. Astron. Soc. 317, 649 (2000)

Bensch, Panis, Stutzki, Heithausen, Falgarone
The IRAM key-project: Small-scale structure of pre-star-forming clouds: III. Influence of and correction for the error beam pick-up
Astron. Astrophys. 365, 275 (2001)

Bensch, Stutzki, Heithausen
Methods and constraints for the correction of the error beam pick-up in single-dish radio observations
Astron. Astrophys. 365, 285 (2001)

Bird, Janardhan, Wilson, Huchtmeier, Gensheimer, Lemme
K-band radio observations of comet Hale-Bopp. Detections of ammonia and (possibly) water
Earth, Moon, Planets 78, 21 (1999)

Brüns, Kerp, Kalberla, Mebold
The head-tail structure of high-velocity clouds - A survey of the northern sky
Astron. Astrophys. 357, 120 (2000)

Brüns, Kerp, Pagels
Deep HI observations of the compact high-velocity cloud HVC125+41-207
Astron. Astrophys. 370, L26 (2001)

Chashei, Bird, Efimov, Andreev, Samoznaev
Five-minute magnetic field fluctuations in the solar wind acceleration region
Solar Phys. 189, 399 (1999)

Chin, Henkel, Langer, Mauersberger
The detection of extragalactic 15^N: nitrogen nucleosynthesis and chemical evolution
Astrophys. J. 512, L143 (1999)

Chyzy, Beck, Kohle, Klein, Urbanik
Regular magnetic fields in the dwarf irregular galaxy NGC 4449
Astron. Astrophys. 355, 128 (2000)

Dickey, Mebold, Stanimirovic, Staveley-Smith
Cold Atomic Gas in the Small Magellanic Cloud
Astrophys. J. 536, 756 (2000)

Efimov, Samoznaev, Andreev, Chashei, Bird
Quasi-harmonic Faraday-rotation fluctuations of radio waves when sounding the outer solar corona
Prisma Astron. Zh 26, 630 (2000); Astron. Lett. 26, 544 (2000)

Enßlin, Simon, Biermann, Klein, Kohle, Kronberg, Mack
Radio Evidence for a Cosmological Shock Wave at Intersecting Filaments of Galaxies
Astrophys. J. 594, L39 (2001)

Feretti, Dallacasa, Govoni, Giovannini, Taylor, Klein
The radio galaxies and the magnetic field in Abell 119
Astron. Astrophys. 344, 472 (1999)

Greve, Neininger, Tarchi, Sievers
The minor axis outflow of NGC 2146
Astron. Astrophys. 364, 409 (2001)

Heithausen
Evidence for inward motion in a galactic cirrus cloud
Astron. Astrophys. Lett. 349, L53 (1999)

Heithausen, Walter
Extensive molecular gas in the tidal arms near NGC 3077 - Birth of a dwarf galaxy?
Astron. Astrophys. 361, 500 (2000)

Heithausen, Weiß, Kerp, Fritz
Atomic Carbon in Intermediate-Velocity Clouds
Astrophys. J. 561, 238 (2001)

Hüttemeister, Aalto, Wall
The discovery of a gas-rich bar in UGC 2855: a galaxy in a pre-starburst phase?
Astron. Astrophys. 346, 45 (1999)

Hüttemeister, Aalto, Wall, Das
Changing molecular gas properties in the bar and center of NGC 7479
Astron. Astrophys. 363, 93 (2000)

Janardhan, Bird, Edenhofer, Wohlmuth, Plettemeier, Asmar, Pätzold, Karl
Coronal velocity measurements with Ulysses: Multi-link correlation studies during two superior conjunctions
Solar Phys. 184, 157 (1999)

Kahabka, de Boer, Brüns
ROSAT X-ray sources in the field of the LMC. I. Total LMC gas from the background AGN spectral fits
Astron. Astrophys. 371, 816 (2001)

Kalberla, Shchekinov, Dettmar
H_2 dark matter in the Galactic halo from EGRET
Astron. Astrophys. 350, L9 (1999)

Kerp, Burton, Egger, Freyberg, Hartmann, Kalberla, Mebold, Pietz
A search for soft X-ray emission associated with prominent high-velocity-cloud complexes
Astron. Astrophys. 342, 213 (1999)

Lara, Mack, Lacy, Klein, Cotton, Feretti, Giovannini, Murgia
The giant radio galaxy 8C0821+695 and its environment
Astron. Astrophys. 356, 63 L (2000)

Lotova, Obridko, Vladimirski, Bird, Pätzold, Sieber, Güsten, Korelov
Long-term scintillation variations in the circumsolar plasma
Solar Phys. 189, 387 (1999)

Marx-Zimmer, Herbstmeier, Dickey, Zimmer, Staveley-Smith, Mebold
A study of the cool gas in the Large Magellanic Cloud
Astron. Astrophys. 354, 787 (2000)

Melchior, Viallefond, Guelin, Neininger
Detection of CO in the inner part of M31's bulge
Mon. Not. R. Astron. Soc. 312 /3, L 29 (2000)

Murgia, Fanti C., Fanti R., Gregorini, Klein, Mack, Vigotti
Synchrotron spectra and ages of compact steep spectrum radio sources
Astron. Astrophys. 345, 769 (1999)

Ott, Walter, Brinks, van Dyk, Dirsch, Klein
Evidence for Blow Out in the Low-Mass Dwarf Galaxy Holmberg I
Astron. J. 122, 3070 (2001)

Pietsch, Vogler, Klein, Zinnecker
X-ray observations of the starburst galaxy NGC 253: II. Extended emission from hot gas in the nuclear area, disk and halo
Astron. Astrophys. 360, 24 (1999)

Richter, de Boer, Bomans, Chin, Heithausen, Koorneef
Orfeus II echelle spectra: On the H_2/CO ratio in LMC gas towards LH10
Astron. Astrophys. 351, 323 (1999)

Richter, Savage, Wakker, Sembach, Kalberla
The FUSE Spectrum of PG 0804+761: A Study of Atomic and Molecular Gas in the Lower Galactic Halo and Beyond
Astrophys. J. 549, 281 (2001)

Richter, Sembach, Wakker, Savage, Tripp, Murphy, Kalberla, Jenkins
The Diversity of High- and Intermediate-Velocity Clouds: Complex C versus IV Arch
Astrophys. J. 559, 318 (2001)

Rodriguez-Fernandez, Martin-Pintado, de Vicente, Fuente, Hüttemeister, Wilson, Kunze
Non-equilibrium H_2 ortho-to-para ratio in two molecular clouds of the Galactic Center
Astron. Astrophys. 356, 695

Schoenmakers, Mack, de Bruyn, Röttgering, Klein, van der Laan
A new sample of giant radio galaxies from the WENSS survey. II. A multi-frequency radio study of a complete sample: Properties of the radio lobes and their environments
Astron. Astrophys. 146, 293 (2000)

Tarchi, Neininger, Greve, Klein, Garrington, Muxlow, Pedlar, Glendenning
Radio supernovae, supernova remnants and HII regions in NGC 2146 observed with MERLIN and the VLA
Astron. Astrophys. 358, 95 (2000)

Taylor, Hüttemeister, Klein, Greve
Giant molecular clouds in the dwarf galaxy NGC 1569
Astron. Astrophys. 349, 424 (1999)

Taylor, Klein
A search for CO in the Local Group dwarf irregular galaxy WLMA
Astron. Astrophys. 366, 811 (2001)

Thuma, Neininger, Klein, Wielebinski
Cold dust in the starburst galaxy M82
Astron. Astrophys. 358, 65 (2000)

van Woerden, Schwarz, Peletier, Wakker, Kalberla
Accretion of low-metallicity gas by the Milky Way
Nature 400, 138 (1999)

Vigotti, Gregorini, Klein, Mack
Multi-frequency study of the B3-VLA sample. II. The database
Astron. Astrophys. 139, 359 (1999)

Wakker, Kalberla, van Woerden, de Boer, Putman
HI Spectra and Column Densities toward HVC and IVC Probes
Astrophys. J., Suppl. Ser. 136, 537 (2001)

Wallace, Landecker, Kalberla, Taylor
The Interstellar Environment of Filled-Center Supernova Remnants III: The Crab Nebula
Astrophys. J., Suppl. Ser. 124, 181 (1999)

Walter, Brinks
The Violent Interstellar Medium of IC 2574
Astron. J. 118, 273 (1999)

Walter, Heithausen
Discovery of Molecular Clouds in the Tidal Arms near NGC 3077
Astrophys. J. Letters 519, L69 (1999)

Walter, Taylor, Hüttemeister, Scoville, McIntyre
The Interaction between the ISM and Star Formation in the Dwarf Starburst Galaxy NGC 4214
Astron. J. 121, 727 (2001)

Weiß, Heithausen, Herbstmeier, Mebold
A molecular cloud forming in the disk-halo interface
Astron. Astrophys. 344, 955 (1999)

Weiß, Neininger, Henkel, Stutzki, Klein
First detection of Ammonia in M82
Astrophys. J. 554, L143 (2001)

Weiß, Neininger, Hüttemeister, Klein
The effect of violent star formation on the state of the molecular gas in M82
Astron. Astrophys. 365, 571 (2001)

Weiß, Walter, Neininger, Klein
Evidence for an Expanding Molecular Superbubble in M82
Astron. Astrophys. 345, L23 (1999)

Wouterloot, Brand
Outflow sources in the Vela region
Astron. Astrophys., Suppl. Ser. 140, 177 (1999)

Wouterloot, Heithausen, Schreiber, Winnewisser
Multiline CO observations of MBM32
Astron. Astrophys. Suppl. Ser. 144, 123 (2000)


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