Science Archives Publication System

Radiative Cooling and Heating and Thermal Conduction in M87

DOI: 10.1086/421314 Bibcode: 2004ApJ...609..638G

Molendi, Silvano; Ghizzardi, Simona; De Grandi, Sabrina +1 more

The crisis of the standard cooling flow model brought about by Chandra and XMM-Newton observations of galaxy clusters has led to the development of several models that explore different heating processes in order to assess whether they can quench the cooling flow. Among the most appealing mechanisms are thermal conduction and heating through buoya…

2004 • The Astrophysical Journal

XMM-Newton 38

On Re-sampling of Solar Images

DOI: 10.1023/B:SOLA.0000021743.24248.b0 Bibcode: 2004SoPh..219....3D

DeForest, C. E.

Digital image data are now commonly used throughout the field of solar physics. Many steps of image data analysis, including image co-alignment, perspective reprojection of the solar surface, and compensation for solar rotation, require re-sampling original telescope image data under a distorting coordinate transformation. The most common image re…

2004 • Solar Physics

SOHO 38

Hα-derived Star Formation Rates for the z = 0.84 Galaxy Cluster Cl J0023+0423B

DOI: 10.1086/381729 Bibcode: 2004ApJ...604..141F

Zaritsky, Dennis; Finn, Rose A.; McCarthy, Donald W., Jr.

We present Hα-derived star formation rates (SFRs) for the galaxy cluster Cl J0023+0423B at z=0.845. Our 3 σ flux limits correspond to an SFR of 0.24 h^-2₁₀₀ M_solar yr^-1, and our minimum reliable Hα+[NII] equivalent width is greater than 10 Å, demonstrating that near-infrared narrowband imaging can sample …

2004 • The Astrophysical Journal

eHST 38

Cluster survey of cusp reconnection and its IMF dependence

DOI: 10.1029/2004GL020646 Bibcode: 2004GeoRL..3119808T

Lavraud, B.; Rème, H.; Dunlop, M. +3 more

We have surveyed the occurrence of tailward-of-the-cusp reconnection detected by Cluster as a function of the interplanetary magnetic field (IMF) clock angle. The survey covers 3 years (2001-2003) of cusp and magnetopause (MP) crossings and is restricted to periods of relatively stable IMF. Our survey indicates that the reconnection associated pla…

2004 • Geophysical Research Letters

Cluster 38

CNO Abundances in Metal-Rich Environments: Infrared Space Observatory Spectroscopy of Ionized Gas in M51

DOI: 10.1086/425883 Bibcode: 2004AJ....128.2772G

Skillman, Evan D.; Garnett, Donald R.; Edmunds, Michael G. +2 more

We present Infrared Space Observatory (ISO) Long Wavelength Spectrograph observations centered on the H II region CCM 10 in the spiral galaxy M51. We detect several emission lines in this spectrum, including [O I] 63 and 145 µm, [C II] 158 µm, [O III] 88 µm, and [N II] 122 µm, with a significant upper limit on [N III] 57 &m…

2004 • The Astronomical Journal

ISO 38

Did η Carinae's Weigelt Blobs Originate circa 1941?

DOI: 10.1086/380941 Bibcode: 2004AJ....127.1052D

Currie, Douglas G.; Hajian, Arsen R.; Dorland, Bryan N.

We report astrometric measurements of η Carinae's Weigelt blobs C and D (also known as speckle objects C and D) derived from observations with the Hubble Space Telescope Wide Field Planetary Camera 2. Using three epochs of data with a temporal baseline of 5.9 yr, we measure blob D's proper motion relative to the central star to be 4.4+/-1.4 mas yr…

2004 • The Astronomical Journal

eHST 38

Evolution in the Colors of Lyman Break Galaxies from z~4 to z~3

DOI: 10.1086/381075 Bibcode: 2004ApJ...600L.111P

Papovich, Casey; Dickinson, Mark; Ferguson, Henry C. +11 more

The integrated colors of distant galaxies provide a means for interpreting the properties of their stellar content. Here we use rest-frame UV-to-optical colors to constrain the spectral energy distributions and stellar populations of color-selected, B-dropout galaxies at z~4 in the Great Observatories Origins Deep Survey (GOODS). We combine the Ad…

2004 • The Astrophysical Journal

eHST 38

Far-Ultraviolet Spectroscopic Analyses of Four Central Stars of Planetary Nebulae

DOI: 10.1086/421010 Bibcode: 2004ApJ...609..378H

Bianchi, L.; Herald, J. E.

We analyze the far-UV/UV spectra of four central stars of planetary nebulae (CSPNs) with strong wind features-NGC 2371, A78, IC 4776, and NGC 1535-and derive their photospheric and wind parameters by modeling high-resolution FUSE (Far Ultraviolet Spectroscopic Explorer) data in the far-UV and HST (Hubble Space Telescope) STIS and IUE data in the U…

2004 • The Astrophysical Journal

IUE eHST 38

Signature of oscillations in coronal bright points

DOI: 10.1051/0004-6361:20035666 Bibcode: 2004A&A...418..313U

Doyle, J. G.; Madjarska, M. S.; O'Shea, E. +1 more

A detailed study of two consecutive bright points observed simultaneously with the Coronal Diagnostic Spectrometer (CDS), the Extreme ultraviolet Imaging Telescope (EIT) and the Michelson Doppler Imager (MDI) onboard the Solar and Heliospheric Observatory (SOHO) is presented. The analysis of the evolution of the photospheric magnetic features and …

2004 • Astronomy and Astrophysics

SOHO 38

Alfvén waves in the foreshock propagating upstream in the plasma rest frame: statistics from Cluster observations

DOI: 10.5194/angeo-22-2315-2004 Bibcode: 2004AnGeo..22.2315N

Fränz, M.; Dandouras, I.; Glassmeier, K. +8 more

Available from http://www.copernicus.org/site/EGU/annales/22/7/2315.htm?FrameEngine=false;

2004 • Annales Geophysicae

Cluster 38