... Programme . ... Abstract: In recent years our observational knowledge of several important components of the central region of Centaurus A has increased dramatically: high resolution X-ray observations have revealed unprecedented detail in the jet and surrounding atmosphere; a kpc sized bipolar shell has been detected in the mid-IR; -rays have been detected in the GeV domain by Fermi and in the TeV domain by HESS. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Sample fits to the SB2 observations of HD 22128 (top two frames) and HD 56495 (bottom two frames). Fits (smooth lines) to the observations (points) show the combined synthetic spectra, as well as the two component synthetic spectra. ... HD 22128 and HD 56495 are both double-lined spectroscopic binary systems with short orbital periods, which have been proposed to host magnetic Ap stars. ...

... There are result from two global VLBI observations at 3.6 cm spaced about 2 years. ... The analysis of the apparent motion, indication of the jet flow trajectory and the other implications for the CSS quasars are discussed. ... The quasar 3C380 ( ; thus 1 arcsec corresponds to 4 kpc for , ) is one of the most powerful radio sources (its radio luminosity at 2.7 GHz is ) ( Wilkinson et al. ... 3C380 is a member of the class of Compact Steep Spectrum (CSS) sources. ...

Research on black holes . ... By allowing scientists to peer into the highly energetic centers of galaxies, Hubble continues to make ground-breaking contributions in the study of black holes. For several decades scientists have known from observations across the electromagnetic spectrum that some galaxies have extremely active regions in their cores. ... The galaxy has an impressive band of dust, gas, and young stars that crosses the optical image, especially in observations taken by WFPC2. ...

Abstract -- Calculations are performed for the linear polarization of starlight due to extinction by aligned dust grains when the starlight traverses a medium with irregular magnetic fields. This medium is intended to represent the optically thick components of interstellar clouds which are observed to make little, if any, contribution to the polarization of starlight. ...

... 5 National Astronomy and Ionosphere Center, Cornell University, Ithaca, NY 14853, U.S.A. In this paper we present new radio and near-infrared observations of a bright Halpha knot located south-east of the Cepheus OB3 association, near the ionization front that divides the S155 diffuse HII region from the Cepheus B molecular cloud. ... The larger of the small--diameter components is a blister-type compact HII region, still partly bounded by high density molecular gas. ...

... High-resolution Near-infrared Study of the Deeply Embedded Young Stellar Object S140 IRS 3 . ... P22P We explore the structures immediately surrounding the high-mass young stellar object S140 IRS 3 within the L1204 molecular cloud. ... The S-shaped structure of this feature can be well reproduced by a model assuming a precessing outflow from IRS 3a. Furthermore, we find several elongated features pointing away from IRS 3 in a southern direction. ...

Proposal Identi cation No.: A1965 Date Received: 2004-May-27 13:30:43 Technical Page Proposal Type: Regular General Category: Astronomy Sub-Category: Continuum Observation Category: Total Time Requested: 19 Hours Proposal Title: Absorption by the Tidal HI Filaments associated with NGC 4631 ABSTRACT: We request 19 hours of the Arecibo Telescope to conduct measurements of absorption by Hi tidal laments in the nearby and interacting NGC 4631 galaxy group. ... Maybe Part of the observing run. ...

... In these pages we have collected contributions by fellow amateurs supernovae hunters. These contributions concern mainly the discoveries they made and their searching activity. ... External link) . The discovery of SN1997bp in NGC 4680 (from TA Magazine, vol34, n.397) - text and images. Visual Supernova Searching With The 40 inch Telescope at Siding Spring Observatory . ... A web page on SN1995G in NGC 1643 (external link to the South Australia Astronomical Society) - text and images. ...

... We propose that the bimodal nature of the kick velocity distribu­ tion of radio pulsars is connected to the dichotomy between hadronic stars (i.e. neutron stars with no quark matter content) and quark stars. ... Here we propose a scenario in which the low­velocity part of the distribution is connected with normal (hadronic) compact stars, and high­velocity part is formed by objects with some amount of quark matter inside (hybrid or strange stars). ...

... Direct observation of the vortex structure in high- T c superconductors in tilted magnetic fields. Abstract: . A high-resolution Bitter technique has been used to observe an effect of tilting the external magnetic field on the flux line lattice (FLL) in Tl 2 Ba 2 CaCu 2 O 8+x single crystals. ... The reason is believed to be that the formation of the equilibrium vortex state (vortex chains) was prevented by strong pinning, revealed for our crystals by the M(t) curves. ...

... OCR by H.Andernach 1/96, to be proof-read) This is the first of a series of papers presenting results of a 10-GHz radio continuum survey of the galactic plane region using the 45-m telescope at Nobeyama. ... Weak Nonthermal Sources: A comparison with the Bonn S-GHz survey reveals a number of weak nonthermal sources near the galactic plane. ... For this reason we conducted a survey of the galactic plane region at 10 GHz using the 45-m radio telescope at the Nobeyama Radio Observatory (NRO). ...

... For NGC3516 we find that the X­ray warm absorption and the broad UV associated absorption features can be produced by the same absorbing material. ... Is it also true for NGC3516? ... 1996). ... Here we argue that the XUV absorption picture is consis­ tent with the presence of a highly ionized X­ray absorber and the current non­ detection of CIV and NV broad absorption lines (see Fig. ... Pre­1992: It showed broad, high ionization CIV and NV absorption lines and an X­ray ionized absorber (U ! ...

An analysis of celestial p ole offset observations in the free core nutation frequency band Z. Malkin, N. Miller Central (Pulkovo) Astronomical Observatory RAS, St. Petersburg 196140, Russia Abstract. In this study, three empirical Free Core Nutation (FCN) models developed to the present time, MHB2000, Malkin's and Lambert's ones, are compared on the basis of representation of variations of the FCN amplitude and phase predicted by these models. ... McCarthy D.D. (2005). The free core nutation. ...

... The HST uses an onboard model of its orbit to perform in real-time various control functions relating to spacecraft operations and observation support. ... New coefficients for the ephemeris are updated every other day, and are archived as FITS keywords for each HST observation data set. Using these coefficients,an observer can perform a variety of calibration and characterization calculations relating to the orbital position and velocity of the telescope. ...

This all-sky image shows the spatial distribution over the whole sky of the galactic haze at 30 and 44 GHz, extracted from the Planck observations. In addition to this component, other foreground components such as charged particles accelerated radially, known as synchrotron radiation, thermal dust, spinning dust, and extragalactic point sources contribute to the total emission detected by Planck at these frequencies. ... ESA/Planck Collaboration ...

... Science . ... Science Users Information > Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: High-mass Star Formation at High-Angular Resolution . ... Data Handling and Products . ... Science Data Products Forum . ... ESO Data . ... ESO Data Access Policy . ... This project aims to obtain a better understanding of high-mass star formation by performing a comparative study of sites of high-mass star formation that display SiO maser (radio laser) emission. ...

Authors: V.A. Marsakov , T.V. Borkova , . ... It is shown that general populations of globular clusters and metal-poor field stars are components at least of three subsystems occupying different volumes in the Galaxy. The thick disk and proto-disk subsystems are genetically associated with the Galaxy. ... It is argued that heavy-element enrichment and the collapse of the proto-galactic medium occurred mainly in the period between the formation of the proto-disk halo and thick disk subsystems. ...

... Keck spectropolarimetry, giving spectral coverage from Ly- to beyond CIII], and HST imaging of a sample of powerful radio galaxies with has been obtained. ... This is a short progress report on a rather extensive programme we are carrying out to study the structure and composition of high redshift radio galaxies (HzRG) -- and, by implication, the host galaxies of radio quasars -- using observations in the optical, IR and mm bands. ... An example of the NICMOS and WFPC 2 imaging is shown in Figure 2 ...

... A radio galaxy is a galaxy that emits an unusually big amount of energy at radio wavelengths. ... Inside of each galaxy with an active nucleus (radio galaxies are among them) there must be a system of a "central machine" responsible for the colossal amount of the emitted energy from radio to gamma ranges. ... Sometimes a radio source in an active galaxy may flare again if the needed conditions appear (a new portion of matter would fall into the furnace of the "central machine"). ...