... Programme . ... Abstract: Planetary nebulae constitute a unique source of light element abundances for individual stars in a distant stellar population. Multi-slit spectra of 50 planetary nebulae (PN) in NGC 5128 have been observed with the ESO VLT and FORS1 spectrometer. The planetary nebulae were observed in three fields covering a range of galactic radii from 2 to 19 kpc. The emission line spectra have been analysed for light element abundances (He, O, N, Ne, S, Ar). ...

... In reducing some FORS2 MXU spectra, we are using a star which was observed in MOS mode to flux-calibrate the spectra. For chip1, everything is ok, but chip 2 fails. ... Observing with ESO Telescopes . ... ESO-MIDAS . ... In the MOS observations on the standard star, the standard is located on chip 1. Therefore the chip 1 data has to be used to determine the spectral response function for both chips, so you will have to use the chip 1 data for input, even when reducing the chip 2 data. ...

... We present the fifth list with results of the Hamburg/SAO Survey for Emission-Line Galaxies (HSS therein, SAO - Special Astrophysical Observatory, Russia). ... The data of this snap-shot spectroscopy survey confirmed 166 emission-line objects out of 209 observed candidates and allowed their quantitative spectral classification and redshift determination. ... For the remaining 30 previously known ELGs we give either improved data of the line intensities or some independent measurements. ... Galaxies ...

... A DISTANCE LIMITED SAMPLE OF WOLF-RAYET STARS } \author{Claus Leitherer\\ \\ Space Telescope Science Institute,\thanks{Operated by AURA for NASA under contract NAS5-26555} 3700 San Martin Drive, Baltimore, MD 21218\\ \\ e-mail: leitherer@stsci.edu\\ \and Jessica M.\ Chapman\\ \\ Anglo-Australian Observatory, P.O.\ Box 296, Epping, NSW 2121, Australia \\ \\ and\\ \\ Australia Telescope National Facility, P.O.\ Box 76, Epping, NSW 2121, ... We derive mass-loss rates for the thermal sources. ...

... We study the variation of the line width and electron density as a function of height above two coronal holes from forbidden spectral lines of Si VIII. The spectra were obtained with the Solar Ultraviolet Measurements of Emitted Radiation spectrometer flown on the Solar and Heliospheric Observatory spacecraft. ... The electron density shows a decrease from 1.1 10 8 cm -3 to 1.6 10 7 cm -3 over the same distance. ...

... 2000; Persi et al. 2000). One of these stars (Cha Halpha1) is a bona-fide brown dwarf, with mass 0.04-0.05 Msun. ... This result provides a first indication that the formation mechanism of T Tauri stars (via core contraction and formation of an accretion disk) extends to objects in the brown dwarf mass range. ...

Emission Line Diagnostics in a ``No UV Bump'' Quasar PHL909 Smita Mathur, Belinda Wilkes, Martin Elvis and Jonathan McDowell Abstract PHL909 is a quasar with unusually low ultraviolet luminosity (blue bump strength C UV=IR = \Gamma0:20 compared to an average value of 0:4 (McDowell et al. ... The intrinsic continuum of PHL909 ( i.e. as seen by the BELR ) may thus be similar to the `standard' continuum, with a big blue bump, reddened along the line of sight. ...

... Data of obs. ... Reduced (Paper I) . NGC 0023 . VIII.1998 . ... NGC 0132 . ... Reduced . NGC 0157 . ... NGC 0615 . ... NGC 0753 . ... NGC 0945 . ... Bad data (clouds); . NGC 0972 . ... II.1998 . ... NGC 1024 . ... NGC 1058 . ... NGC 1073 . ... NGC 1084 . ... NGC 1134 . ... NGC 1637 . ... NGC 2276 . ... NGC 2608 . ... NGC 2964 . ... NGC 3184 . ... Bad data (low S/N) . NGC 3338 . ... Bad data (IFP failure) . NGC 3344 . ... Reduced (bad data) . ... Back to Project Vortex. ...

... Field dependent thermal conductivity of Tl 2 Ba 2 CuO 6 : evidence for Andreev scattering of quasiparticles. Abstract: . We have studied the thermal conductivity of Tl 2 Ba 2 CuO 6 (Tl-2201) crystals as functions of temperature and magnetic field. A thermal conductivity peak is observed near 0.6 T c which is greatly reduced on application of a magnetic field along the c axis. ... A model based on Andreev reflection by vortex screening currents is shown to be consistent with these results. ...

Next: NICMOS/HST H-band (F160W) Images Up: NICMOS Science Previous: HST NICMOS Observations of . ... Observations of P . ... The NICMOS team has devised a comprehensive program of observations of the Galactic Center. ... Data in hand give a first look at variability and a detailed look at the search for the tip of the main sequence will be discussed where NICMOS has demonstrated adequate sensitivity and photometric precision to identify likely O8-B1 stars at the Galactic Center. ...

January 7, 2000 Dr. Eric Torrence, University of Chicago . ... 3:00pm, 240D Willamette Hall . Dr. Torrence will also present the Physics Colloquium on January 6. return to top . ... Dr. Morii will also present the Physics Colloquium on January 24. return to top . ... return to top . ... The ratio of the inclusive jet cross sections at center of mass energies 0.63 TeV and 1.8 TeV is also presented versus scaled jet transverse energy x_T and compared to QCD predictions. 3:00pm, 472 Willamette Hall . ...

... Abstract . We have observed CO J=1-0 and J=2-1 emission in a cloud known to contain H I Self Absorption (HISA) (Gibson et al. 2000) in Perseus ( l ~= 1°, b ~= 139°) in order to determine the molecular gas fraction and the evolutionary state of the cloud. ... Student abstract . Les r sum s diffus s sur la page web de la CASCA 2002 sont sujets des modifications, de fa on les conformer aux standards de pr sentation HTML et au r pertoire de caract res typographiques disponibles. ...

... An interactive IRAF task for the analysis of Extreme Ultraviolet Explorer ( EUVE ) emission line spectra is presented. The line flux in extracted spectra may be measured by multiple techniques, including fitting individual lines. ... To aid in identifying lines, the positions of known lines may be marked on the spectrum during the fitting process. Also, model EUVE spectra may be constructed and overlaid using plasma emissivities and source emission measures supplied by the user. ...

... Future seminars . ... Relativistic magneto-active laser plasmas " . ... Generation of super-strong magnetic fields. ... This method is based on the observation of resonance interaction between the Landau levels in magnetic field and energy levels of plasma ions. ... The important peculiarity of the energy distribution of fast ions is their slow decreasing up to the energy of 1.4 MeV at the laser intensity of 2 10 18 W/cm 2 ; the effective temperature of fast ions is of the order of 350 keV. ...

... The Southern Sky in Warm Hydrogen . ... Although spectacular emission nebula s glow brightly in this type of red light ( H-alpha ), a diffuse amount of warm hydrogen is spread throughout our Galaxy and its glow nicely indicates not only where darker hydrogen and other gasses may be located, but also the sometimes- complex history of interstellar gas . ... Publications with keywords: SHASSA - Milky Way - H-alpha . Publications with words: SHASSA - Milky Way - H-alpha . ...

Proceedings of the Particle Physics and Early Universe Conference (PPEUC). ... TESRE, Consiglio Nazionale delle Ricerche, Via Gobetti 101, 40129 Bologna, Italy . Dip. Fisica, Universit? di Roma TRE, Roma, Italy . ... Observations will take advantage of the exceptional dryness and stability of the atmosphere on the high Antarctic Plateau, at Dome C. The first run of observations was performed in December 96 -- January 97 at the Italian-French site, Concordia, at Dome C (Antarctica). ...

Find Similar Abstracts . ... Giant voids in the universe . ... ASTRONOMICAL MODELS, GALACTIC CLUSTERS, GALACTIC EVOLUTION, GALACTIC STRUCTURE, SPATIAL DISTRIBUTION, UNIVERSE, ADIABATIC CONDITIONS, COSMOLOGY, MASS DISTRIBUTION, NEUTRINOS . ... Use: Authors Title Abstract Text Text Query with Keywords Return: Query Results Query Form Database: Astronomy Instrumentation Physics and Geophysics ABSTRACT QUERY USER FEEDBACK HELP ...

... We have used a coupled dynamical and chemical model to examine the chemical changes caused by the passage of a density wave propagating into the protostellar cloud. ... The chemical coupling between gas and dust causes locally increased number densities of active ra dicals, such as C, N, O, NH, and OH, and hydrogen saturated molecules CH 4 , NH 3 and H 2 O. We show that chemical evolution in the post-wave gas can account for the observed abundance of water and NH 3 observed in interstellar clouds. ...

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