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Chromospheric Evaporation and Warm Rain during a Solar Flare Observed in High Time Resolution with the Coronal Diagnostic Spectrometer aboard the Solar and Heliospheric Observatory
Brosius, Jeffrey W.
We present EUV light curves, Doppler shifts, and line-broadening measurements for a flaring solar active region obtained with the Coronal Diagnostic Spectrometer (CDS) aboard the NASA ESA Solar and Heliospheric Observatory (SOHO) under conditions of (1) comprehensive temporal coverage (including the quiescent preflare, impulsive, and gradual decli…
Near-IR echelle spectroscopy of Class I protostars: Mapping Forbidden Emission-Line (FEL) regions in [FeII]
Ray, T. P.; Chrysostomou, A.; Davis, C. J. +1 more
Near-IR echelle spectra in [FeII] 1.644 mu m emission trace Forbidden Emission Line (FEL) regions towards seven Class I HH energy sources (SVS 13, B5-IRS1, IRAS 04239+2436, L1551-IRS5, HH 34-IRS, HH 72-IRS and HH 379-IRS) and three classical T Tauri stars (AS 353A, DG Tau and RW Aur). The parameters of these FEL regions are compared to the charact…
A Chandra Study of the Complex Structure in the Core of 2A 0335+096
Mazzotta, P.; Markevitch, M.; Edge, A. C.
We present a Chandra observation of the central (r<200 kpc) region of the cluster of galaxies 2A 0335+096, rich in interesting phenomena. On large scales (r>40 kpc), the X-ray surface brightness is symmetric and slightly elliptical. The cluster has a cool, dense core; the radial temperature gradient varies with position angle. The radial met…
High-Resolution Observations of Interstellar Ca I Absorption-Implications for Depletions and Electron Densities in Diffuse Clouds
Welty, Daniel E.; Hobbs, L. M.; Morton, Donald C.
We present high-resolution (FWHM~0.3-1.5 km s-1) spectra, obtained with the AAT UHRF, the McDonald Observatory 2.7 m coudé spectrograph, and/or the KPNO coudé feed, of interstellar Ca I absorption toward 30 Galactic stars. Comparisons of the column densities of Ca I, Ca II, K I, and other species-for individual components identified in …
Gamma-Ray Lines from Asymmetric Supernovae
Fryer, Chris L.; Hungerford, Aimee L.; Warren, Michael S.
We present three-dimensional smoothed particle hydrodynamics simulations of supernova explosions from 100 s to 1 yr after core bounce. By extending our modeling efforts to a three-dimensional hydrodynamics treatment, we are able to investigate the effects of explosion asymmetries on mixing and γ-ray line emergence in supernovae. A series of initia…
Fine-Scale Temperature Fluctuations in the Orion Nebula and the t2 Problem
O'Dell, C. R.; Peimbert, Antonio; Peimbert, Manuel
We present a high spatial resolution map of the columnar electron temperature (Tc) of a region to the southwest of the Trapezium in the Orion Nebula. This map was derived from Hubble Space Telescope images that isolated the primary lines of H I for determination of the local extinction and of the [O III] lines for determination of T
ISOGAL: A deep survey of the obscured inner Milky Way with ISO at 7 mu m and 15 mu m and with DENIS in the near-infrared
Genzel, R.; Price, S. D.; Alard, C. +51 more
The ISOGAL project is an infrared survey of specific regions sampling the Galactic Plane selected to provide information on Galactic structure, stellar populations, stellar mass-loss and the recent star formation history of the inner disk and Bulge of the Galaxy. ISOGAL combines 7 and 15 µm ISOCAM observations -- with a resolution of 6 arcse…
Simultaneous multi-wavelength observations of GRS 1915+105
Goldoni, P.; Chaty, S.; Rodriguez, J. +11 more
We present the result of multi-wavelength observations of the microquasar GRS 1915+105 in a plateau state with a luminosity of ~ 7.5*E38 erg s-1 ( ~ 40% L_Edd), conducted simultaneously with the INTEGRAL and RXTE satellites, the ESO/NTT, the Ryle Telescope, the NRAO VLA and VLBA, in 2003 April 2-3. For the first time were obs…
The Low-Mass X-Ray Binary-Globular Cluster Connection. II. NGC 4472 X-Ray Source Properties and Source Catalogs
Kundu, Arunav; Zepf, Stephen E.; Maccarone, Thomas J.
We present the results of a Chandra/Hubble Space Telescope (HST) study of the point sources of the Virgo Cluster giant elliptical galaxy NGC 4472. We identify 144 X-ray point sources outside the nuclear region, 72 of which are located within the HST fields. The optical data show 1102 sources, of which 829 have colors consistent with being globular…
The properties of the absorbing and line-emitting material in IGR J16318 - 4848
Guainazzi, Matteo; Matt, Giorgio
We have performed a detailed analysis of the XMM-Newton observation of IGR J16318-4848, to study the properties of the matter responsible for the obscuration and for the emission of Fe and Ni lines. Even if the line-of-sight material has a column density of about 2 × 1024 cm-2, from the Fe Kα line EW and Compton Shoulder we a…