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Showing 41-60 of 10,000 results
  1. Quasar Host Galaxies of GEMS, First Results: 0.5 < z < 2.75

    Understanding the host galaxies (HGs) of quasars is the key to linking the evolution of galaxies and their central black holes. Within the gems...
    K. Jahnke, S.F. Sánchez, ... C. Wolf in Multiwavelength Map** of Galaxy Formation and Evolution
    Conference paper
  2. Brightest Cluster Galaxy Formation in the Cluster C0037-2522: Flattening of the Dark Matter Cusp

    The X-ray cluster C0337-2522 at redshift z = 0.59 hosts in its core a group of five elliptical galaxies. Using N-body simulations we show that a...
    Carlo Nipoti, Massimo Stiavelli, ... Piero Rosati in Multiwavelength Map** of Galaxy Formation and Evolution
    Conference paper
  3. The FORS Deep Field Spectroscopic Survey of High-Redshift Galaxies

    The evolution of the properties of galaxy populations with redshift provides important constraints on current models of galaxy formation and...
    Stefan Noll, Dörte Mehlert, ... Christian Tapken in Multiwavelength Map** of Galaxy Formation and Evolution
    Conference paper
  4. The Cosmological Evolution of Quasar Black-Hole Masses

    The strong correlation observed between black-hole and bulge mass in the local Universe (eg. Magorrian et al. 1998; Gebhardt et al. 2000) directly...
    Ross J. McLure, James S. Dunlop in Multiwavelength Map** of Galaxy Formation and Evolution
    Conference paper
  5. Linear Spectropolarimetry of Young and Other Emission Line Stars

    The aim of this article is to demonstrate the useful role that can be played by spectropolarimetric observations of young and evolved emission line...
    Janet E. Drew, Jorick S. Vink, ... René D. Oudmaijer in High Resolution Infrared Spectroscopy in Astronomy
    Conference paper
  6. Tests for the Magnetospheric Accretion Model for Young Low Mass Stars

    High resolution infrared spectroscopy is a very valuable tool for the study of the formation of low mass and very low mass stars. At the stage in...
    Conference paper
  7. Interpreting the Hydrogen IR Lines – Impact of Improved Electron Collision Data

    We evaluate the effect of variations in the electron-impact excitation cross sections on the non-LTE line formation for hydrogen in early-type stars....
    Norbert Przybilla, Keith Butler in High Resolution Infrared Spectroscopy in Astronomy
    Conference paper
  8. Tracing Accretion onto Herbig Ae/Be Stars Using Near-Infrared Spectroscopy

    The mass accretion rate is thought to be a key parameter in the evolution of young stellar objects (YSOs). As a function of time, the accretion rate...
    Conference paper
  9. Spectroscopy of the M Supergiant α Ori in the 1–2.5 μm Region

    The study of elemental abundances in cool stars via atomic lines in the optical region is made di.cult by stellar molecular absorption. At infrared...
    Martin Lundqvist, Glenn M. Wahlgren in High Resolution Infrared Spectroscopy in Astronomy
    Conference paper
  10. Post-AGB Objects and Planetary Nebulae

    Planetary nebulae and post-AGB objects are luminous dust emitters in the infrared. Indeed it is by virtue of their strong dust emission that most...
    Conference paper
  11. Rotation of Young Very Low Mass Objects

    We present our large sample of photometric rotation periods for VLM objects in young open clusters. Based on these periods, we investigate the mass...
    Alexander Scholz, Jochen Eislöffel in High Resolution Infrared Spectroscopy in Astronomy
    Conference paper
  12. Observation of Plasma Fluctuations

    The diagnostics of fluctuating plasma quantities and their evaluation is an important issue in the context of plasma waves, instabilities, and...
    O. Grulke, T. Klinger in Plasma Physics
    Chapter
  13. Magnetic Confinement

    This chapter describes the basic principles of magnetic confinement. The main representatives of magnetic confinement are the mirror machine, the...
    F. Wagner, H. Wobig in Plasma Physics
    Chapter
  14. X-rays from the First Massive Black Holes

    We briefly review some recent results from Chandra and XMM-Newton studies of the highest redshift ( ) active galactic...
    W.N. Brandt, C. Vignali, ... I.V. Strateva in Growing Black Holes: Accretion in a Cosmological Context
    Conference paper
  15. Narrow Line Seyfert 1 Galaxies and the “Anti-hierarchical” Black Hole Growth

    Using a complete sample of soft X-ray selected AGNs, we show that highly accreting AGNs do not follow the MBH–σ relation of normal galaxies. This...
    Conference paper
  16. Measuring the Masses and Accretion Rates in Rapidly Growing Young NLS1s

    We find that Narrow-Line Seyfert 1 Galaxies accrete at moderately super-Eddington rates. This was already suggested with the discovery of extreme...
    Conference paper
  17. Torus Models for Obscuration in Type 2 AGN

    We discuss a clumpy model of obscuring dusty tori around AGN. Cloud-cloud collisions lead to an effective viscosity and a geometrically thick...
    T. Beckert, W.J. Duschl, B. Vollmer in Growing Black Holes: Accretion in a Cosmological Context
    Conference paper
  18. Narrow-Line Seyfert 1 Galaxies: Growing Black Holes at Supercritical Accretion?

    The X-ray spectra of NLS1, characterized by a significant soft excess and a steep hard tail analogous to the soft-state black-hole binaries, are...
    Conference paper
  19. Formation of the First Supermassive Black Holes

    Understanding the emergence of the first supermassive black holes, and hence the first quasars, is a crucial ingredient for models of reionization...
    Conference paper
  20. Black Hole Growth in a Cosmological Context and the Associated Cosmic Star Formation History

    Based on a co-evolution scenario of massive black holes (MBH) and their host spheroids, we trace the BH growth and the joint cosmic star formation...
    Y. P. Wang, T. Yamada, Y. Taniguchi in Growing Black Holes: Accretion in a Cosmological Context
    Conference paper
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