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The XMM-Newton/2dF Survey - VI. Clustering and bias of the soft X-ray point sources
Georgakakis, A.; Georgantopoulos, I.; Plionis, M. +1 more
We study the clustering properties of X-ray sources detected in the wide area (~2deg2) bright, contiguous XMM-Newton/2dF survey. We detect 432 objects to a flux limit of 5 × 10-15ergcm-2s-1 in the soft 0.5-2keV band. Performing the standard angular correlation function analysis, a ~3σ correlation signal …
Photon dominated regions in the spiral arms of M 83 and M 51
Gerin, M.; Stutzki, J.; Kramer, C. +5 more
We present [C I] 3P1-3P0 spectra at four spiral arm positions and the nuclei of the nearby galaxies M 83 and M 51 obtained at the JCMT. The spiral arm positions lie at galacto-centric distances of between 2 kpc and 6 kpc. This data is complemented with maps of CO 1-0, 2-1, and 3-2, and ISO/LWS far-infrared data of [C II] (158…
Rotating Molecular Gas Associated with a Silhouette Disk at the Center of the Radio Galaxy 3C 31
Kohno, K.; Nakanishi, K.; Okuda, T. +1 more
Aperture synthesis observations of 12CO(J=1-0) emissions of the radio galaxy 3C 31 (NGC 383) have been made using the Nobeyama Millimeter Array (NMA) and the RAINBOW interferometer (NMA plus the Nobeyama 45 m radio telescope). Our high-resolution (1.9"×1.4", or 640pc×470pc, at D=70 Mpc) 12CO image shows a circularly rotating …
Comparison of Interplanetary CME Charge State Composition with CME-associated Flare Magnitude
Reinard, A.
This paper describes a study of the charge state composition of interplanetary coronal mass ejection (ICME) ejecta in the heliosphere within the context of remote-sensing CME observations at the Sun. First, CME-ICME pairs are examined to determine if a given CME is associated with a flare event. Then, for each ICME, the charge states, O+7
Halos of Spiral Galaxies. II. Halo Metallicity-Luminosity Relation
Ferguson, H. C.; Rich, R. M.; Mouhcine, M. +2 more
Using the Hubble Space Telescope, we have resolved individual red giant branch stars in the halos of eight nearby spiral galaxies. The fields lie at projected distances between 2 and 13 kpc along the galaxies' minor axes. The data set allows a first look at the systematic trends in halo stellar populations. We have found that bright galaxies tend …
The Magnetic Structure of Filament Barbs
Moon, Yong-Jae; Chae, Jongchul; Park, Young-Deuk
There is a controversy about how features protruding laterally from filaments, called barbs, are magnetically structured. On 2004 August 3, we observed a filament that had well-developed barbs. The observations were performed using the 10 inch refractor of the Big Bear Solar Observatory. A fast camera was employed to capture images at five differe…
Determining the Physical Properties of the B Stars. II. Calibration of Synthetic Photometry
Fitzpatrick, E. L.; Massa, D.
We present a new calibration of optical (UBV, Strömgren uvbyβ, and Geneva) and near-IR (Johnson RIJHK and Two Micron All Sky Survey) photometry for B and early A stars derived from Kurucz ATLAS9 model atmospheres. Our sample of stars consists of 45 normal nearby B and early A stars that have high-quality, low-resolution IUE spectra and accurate Hi…
HST/STIS low dispersion spectroscopy of three Compact Steep Spectrum sources. Evidence for jet-cloud interaction
Capetti, A.; Koekemoer, A. M.; Morganti, R. +9 more
We present Hubble Space Telescope Imaging Spectrograph long-slit spectroscopy of the emission line nebulae in the compact steep spectrum radio sources
Hubble Space Telescope ACS Weak-Lensing Analysis of the Galaxy Cluster RDCS 1252.9-2927 at z = 1.24
Ford, H. C.; Demarco, R.; Rosati, P. +12 more
We present a weak-lensing analysis of one of the most distant massive galaxy clusters known, RDCS 1252.9-2927, at z=1.24, using deep images from the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope (HST). By taking advantage of the depth and angular resolution of the ACS images, we detect for the first time at z>1 a clear w…
Coordinated Cluster/Double Star observations of dayside reconnection signatures
Escoubet, C. P.; Pitout, F.; Zong, Q. -G. +18 more
The recent launch of the equatorial spacecraft of the Double Star mission, TC-1, has provided an unprecedented opportunity to monitor the southern hemisphere dayside magnetopause boundary layer in conjunction with northern hemisphere observations by the quartet of Cluster spacecraft. We present first results of one such situation where, on 6 April…