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  1. No Access

    Chapter and Conference Paper

    Seyfert Galaxies And Their Environment

    The role played by environment on nuclear activity in galaxies is not clear and largely debated (see e.g. Barnes & Hernquist 1992, Kelm 1996). To overcome statistical uncertainties, environment properties of t...

    P. Focardi, B. Kelm, G. G. C. Palumbo in Galaxy Interactions at Low and High Redshift (1999)

  2. No Access

    Chapter and Conference Paper

    A Microwave Jet inside the Rosette Nebula?

    New spectral measurements of the well known HII region Rosette Nebula have been performed with the 32m Medicina (Italy) VLBI single dish [Beamwidth: 5’, beam efficiency: 83%; Tsys ∼ 45K; 1024 channels autocor-rel...

    A. P. Tsivilev, S. Cortiglioni, M. R. Cioni, M. Orsini… in The Non-Slee** Universe (1999)

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    Article

    A Microwave Jet Inside the Rosette Nebula?

    A.P. Tsivilev, S. Cortiglioni, M.R. Cioni, M. Orsini… in Astrophysics and Space Science (1998)

  4. No Access

    Chapter and Conference Paper

    X-Ray Properties of High-Z Radio-Quiet Quasars: ASCA Observations

    The first-ever high energy (∼ 1–30 keV) X-ray spectra of three z ∼ 2 radio-quiet quasars (RQQs) are presented. If confirmed, the most interesting result is the marginal, but consistent, evidence for FeKaemission ...

    M. Cappi, M. Matsuoka, C. Vignali, A. Comastri, T. Mihara, C. Otani… in The Hot Universe (1998)

  5. No Access

    Chapter and Conference Paper

    New measurements of the 4He abundance in galactic HII regions

    Preliminary results of the 4He relative abundance determination from Radio Recombination Lines observations at different frequencies in the Orion, Rosette and W3 HII regions are presented. The Orion HII region ha...

    M. R. Cioni, S. Cortiglioni, M. Orsini… in The Local Bubble and Beyond Lyman-Spitzer-… (1998)

  6. No Access

    Article

    Libri ricevuti e recensioni

    A. Longhetto, G. G. C. Palumbo, M. Storini in Il Nuovo Cimento C (1996)

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    Article

    Libri ricevuti e recensioni

    L. Briatore, G. G. C. Palumbo in Il Nuovo Cimento C (1995)

  8. No Access

    Article

    Libri ricevuti e recensioni

    M. Storini, G. G. C. Palumbo in Il Nuovo Cimento C (1994)

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    Article

    Libri ricevuti e recensioni

    M. Storini, G. G. C. Palumbo, G. Godoli, G. Benedek, A. Longhetto in Il Nuovo Cimento C (1993)

  10. No Access

    Chapter and Conference Paper

    H2O maser survey of IRAS sources at high galactic latitude

    A high galactic latitude (‖b‖ > 10°, δ >- −30°) sample of 175 IRAS sources located within the core of molecular clouds has been searched for H2O maser emission with the Medicina 32 m dish operated at 22 GHz . 17%...

    P. Caselli, C. Codella, G. G. C. Palumbo, G. Pareschi in Astrophysical Masers (1993)

  11. No Access

    Chapter and Conference Paper

    Morphology of Galaxies Surrounding Compact Groups

    Compact groups are small, relatively isolated systems of galaxies with projected separations comparable to the diameters of the galaxies themselves. The most recent, and largest, survey of compact groups is th...

    G. C. Baiesi-Pillastrini, V. Tornatore… in Morphological and Physical Classification … (1992)

  12. No Access

    Chapter and Conference Paper

    The Updated Version of the Catalogue of Radial Velocities of Galaxies

    Since the Catalogue of Radial Velocities of Galaxies (CRVG) (Palumbo et al. 1983) was published, an increasing number of redshifts are published every year. To provide a comprehensive list of data to the astronom...

    G. G. C. Palumbo, G. Vettolani, G. Baiesi-Pillastrini… in The World of Galaxies (1989)

  13. No Access

    Chapter

    X-Ray Constraints on Large Scale Clustering

    We have analyzed the HEAO-1 A2 all-sky survey data to investigate the autocorrelation function of the surface brightness fluctuations of the extra-galactic 2–10 keV X-ray background on angular scales ranging from...

    G. De Zotti, M. Persic, E. A. Boldt… in Large Scale Structure and Motions in the U… (1989)

  14. No Access

    Article

    Some crucial X-ray observations — One or two SNR(s) in Crux?

    A new EXOSAT (LE/CMA) observation of the region in Crux (R.A. ∼11h 45m, Dec. ∼-62°) where Markert et al. (1981) reported the existence of two x-ray SNR's is presented. After “cleaning” the CMA field from the p...

    S. Mereghetti, G. F. Bignami, P. A. Caraveo, A. Goldwurm… in Space Science Reviews (1985)

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    Article

    An X-ray study of M51 (NGC 5194) and its companion (NGC 5195)

    Observations of NGC 5194/95 with the Einstein HRI show a very strong nuclear X-ray source, surrounded by a diffuse flux, three point sources and the companion. The diffuse flux, which correlates well with the ...

    G. G. C. Palumbo, G. Fabbiano, C. Fransson, G. Trinchieri in Space Science Reviews (1985)

  16. No Access

    Chapter and Conference Paper

    Some Crucial X-Ray Observations — One or Two SNR(s) in Crux?

    A new EXOSAT (LE/CMA) observation of the region in Crux (R.A. ∿11h 45m, Dec. ∿-620 ) where Markert et al. (1981) reported the existence of two x-ray SNR’s is presented. After “cleaning” the CMA field from the poi...

    S. Mereghetti, G. F. Bignami, P. A. Caraveo… in X-Ray Astronomy in the Exosat Era (1985)

  17. No Access

    Chapter and Conference Paper

    An X-Ray Study of M51 (NGC 5194) and its Companion (NGC 5195)

    Observations of NGC 5194/95 with the Einstein HRI show a very strong nuclear X-ray source, surrounded by a diffuse flux, three point sources and the companion. The diffuse flux, which correlates well with the ...

    G. G. C. Palumbo, G. Fabbiano, C. Fransson… in X-Ray Astronomy in the Exosat Era (1985)

  18. No Access

    Chapter

    Redshifts for Zwicky’s Near Clusters

    Studies of the structure of the Universe on scales larger than clusters of galaxies may provide a test for alternative theoretical models for the evolution of the Universe itserlf. Abell’s clusters (Abell 1958...

    G. C. Baiesi-Pillastrini, G. G. C. Palumbo, G. Vettolani in Clusters and Groups of Galaxies (1984)

  19. No Access

    Article

    Observations of supernova explosions and cosmic rays

    A summary of coordinated observations at various frequencies of two type II and three type I SNe is given. Since type II events emit radio and X-ray radiation in the early phases it is shown how one has data t...

    G. G. C. Palumbo in Space Science Reviews (1983)

  20. No Access

    Chapter and Conference Paper

    Observations of Supernova Explosions and Cosmic Rays

    A summary of coordinated observations at various frequencies of two type II and three type I SNe is given. Since type II events emit radio and X-ray radiation in the early phases it is shown how one has data t...

    G. G. C. Palumbo in Galactic Astrophysics and Gamma-Ray Astronomy (1983)

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