Science Archives Publication System

Properties of local plasma injections in Saturn's magnetosphere

DOI: 10.1029/2005GL022611 Bibcode: 2005GeoRL..3214S02B

André, N.; Coates, A. J.; Kurth, W. S. +6 more

Electron and ion drift dispersion events are often observed by the Cassini Plasma Spectrometer (CAPS) in the inner magnetosphere of Saturn (5 to 10 R_S). These events appear to result from azimuthally-limited injections of plasma and persist for at least several hours. During this time, the events can be analyzed to obtain information on…

2005 • Geophysical Research Letters

Cassini 89

Regularized orbit models unveiling the stellar structure and dark matter halo of the Coma elliptical NGC 4807

DOI: 10.1111/j.1365-2966.2005.09139.x Bibcode: 2005MNRAS.360.1355T

Saglia, R. P.; Thomas, D.; Thomas, J. +5 more

This is the second in a series of papers dedicated to unveiling the mass structure and orbital content of a sample of flattened early-type galaxies in the Coma cluster. The ability of our orbit libraries to reconstruct internal stellar motions and the mass composition of a typical elliptical in the sample is investigated by means of Monte Carlo si…

2005 • Monthly Notices of the Royal Astronomical Society

eHST 89

Star-formation in NGC 4038/4039 from broad and narrow band photometry: cluster destruction?

DOI: 10.1051/0004-6361:20052908 Bibcode: 2005A&A...443...41M

Genzel, R.; Lehnert, M. D.; Mengel, S. +1 more

Accurately determining the star formation history in NGC 4038/4039 - "The Antennae" - is hampered by variable and sometimes substantial extinction. We therefore used near infrared broad- and narrow-band images obtained with ISAAC at the VLT and with SOFI at the NTT to determine the recent star formation history in this prototypical merger. In comb…

2005 • Astronomy and Astrophysics

eHST 89

Cassini Visual and Infrared Mapping Spectrometer Observations of Iapetus: Detection of CO₂

DOI: 10.1086/429800 Bibcode: 2005ApJ...622L.149B

Sotin, C.; Brown, R. H.; Baines, K. H. +26 more

The Visual and Infrared Mapping Spectrometer (VIMS) instrument aboard the Cassini spacecraft obtained its first spectral map of the satellite Iapetus in which new absorption bands are seen in the spectra of both the low-albedo hemisphere and the H₂O ice-rich hemisphere. Carbon dioxide is identified in the low-albedo material, probably a…

2005 • The Astrophysical Journal

Cassini 89

XMM-Newton observations of Extremely Red Objects and the link with luminous, X-ray obscured quasars

DOI: 10.1051/0004-6361:20041468 Bibcode: 2005A&A...432...69B

Cimatti, A.; Daddi, E.; Fiore, F. +8 more

We present the results of a deep (about 80 ks) XMM-Newton survey of the largest sample of near-infrared selected Extremely Red Objects (R-K> 5) available to date to K_S⪉ 19.2. At the relatively bright X-ray fluxes (F_{2-10 keV}⪆ 4× 10^-15 erg cm^-2 s^-1) and near-infrared magnitude probed by the p…

2005 • Astronomy and Astrophysics

XMM-Newton 89

The star cluster population of M 51. III. Cluster disruption and formation history

DOI: 10.1051/0004-6361:20052914 Bibcode: 2005A&A...441..949G

Bastian, N.; Gieles, M.; Lamers, H. J. G. L. M. +1 more

In this work we concentrate on the evolution of the cluster population of the interacting galaxy M 51 (NGC 5194), more precisely the timescale of cluster disruption and possible variations in the cluster formation rate. We present a method to compare observed age vs. mass number density diagrams with predicted populations including various physica…

2005 • Astronomy and Astrophysics

eHST 89

New Optical and Near-Infrared Surface Brightness Fluctuation Models. II. Young and Intermediate-Age Stellar Populations

DOI: 10.1086/497591 Bibcode: 2005AJ....130.2625R

Cantiello, M.; Capaccioli, M.; Brocato, E. +1 more

We present theoretical surface brightness fluctuation (SBF) amplitudes for single-burst stellar populations of young and intermediate age (25 Myr<=t<=5 Gyr) and metallicities Z=0.0003, 0.001, 0.004, 0.008, 0.01, 0.02, and 0.04. The fluctuation magnitudes and colors as expected in the Johnson-Cousins (UBVRIJHK) photometric system are provided…

2005 • The Astronomical Journal

eHST 89

An XMM-Newton survey of M 31

DOI: 10.1051/0004-6361:20041990 Bibcode: 2005A&A...434..483P

Pietsch, W.; Haberl, F.; Freyberg, M.

In an analysis of XMM-Newton archival observations of the bright Local Group spiral galaxy M 31 we study the population of X-ray sources (X-ray binaries, supernova remnants) down to a 0.2-4.5 keV luminosity of 4.4~×~ 10³⁴ . EPIC hardness ratios and optical and radio information are used to distinguish between differen…

2005 • Astronomy and Astrophysics

XMM-Newton 88

Sources of Oscillation Frequency Increase with Rising Solar Activity

DOI: 10.1086/429712 Bibcode: 2005ApJ...625..548D

Dziembowski, W. A.; Goode, P. R.

We analyze and interpret SOHO MDI data on oscillation frequency changes between 1996 and 2004, focusing on differences between the activity minimum and maximum of solar cycle 23. We study only the behavior of the centroid frequencies, which reflect changes averaged over spherical surfaces. Both the f-mode and p-mode frequencies are correlated with…

2005 • The Astrophysical Journal

SOHO 88

Radio Observations of the Hubble Deep Field-South Region. II. The 1.4 GHz Catalog and Source Counts

DOI: 10.1086/432873 Bibcode: 2005AJ....130.1373H

Norris, Ray P.; Huynh, Minh T.; Jackson, Carole A. +1 more

This paper is part of a series describing the results from the Australia Telescope Hubble Deep Field-South (ATHDFS) survey obtained with the Australia Telescope Compact Array. This survey consists of observations at 1.4, 2.5, 5.2, and 8.7 GHz, all centered on the Hubble Deep Field-South. Here we present the first results from the extended observin…

2005 • The Astronomical Journal

eHST 88