Science Archives Publication System

Visual Orbit, Differential Photometry, and Dynamical Mass of DG Leo

DOI: 10.1086/508276 Bibcode: 2006AJ....132.2156T

Tamazian, Vakhtang S.

A new orbital solution with a significantly improved accuracy for the elements, differential photometry, and dynamical mass is presented for the visual binary DG Leo, which consists of a spectroscopic binary and a δ Scuti star. Some dynamical and astrophysical implications of the newly obtained results are discussed. In particular, due to possibly…

2006 • The Astronomical Journal

Hipparcos 1

HST/ACS observations of Lyman-break galaxies and Lyα emitters associated with radio galaxies at z>4

DOI: 10.1002/asna.200510507 Bibcode: 2006AN....327..204O

Overzier, R. A.

Distant radio galaxies may pinpoint overdense regions in the early universe. We have collected data with HST/ACS towards several overdensities of Lyα emitters associated with radio galaxies discovered by Venemans et al. Using the Lyman break selection technique we find statistical evidence for additional galaxies associated with the radio galaxies…

2006 • Astronomische Nachrichten

eHST 1

Multiscale, multipoint measurements from Cluster: Advancing our scientific understanding of geospace

DOI: 10.1016/j.asr.2005.01.114 Bibcode: 2006AdSpR..38...21G

Escoubet, C. P.; Goldstein, M. L.; Laakso, H.

Cluster is the first multispacecraft mission with identical instrumentation designed to resolve spatial and temporal structures in geospace. The orbits of the four Cluster spacecraft are variable and are adjusted periodically to place the spacecraft into configurations that optimize the three-dimensional capabilities of the instrumentation. During…

2006 • Advances in Space Research

Cluster 1

XMM-Newton observations of faint X-ray sources in globular clusters

DOI: 10.1016/j.asr.2006.02.066 Bibcode: 2006AdSpR..38.2930W

Webb, N. A.; Barret, D.; Gendre, B.

Using the new generation of X-ray observatories, we are now beginning to identify populations of close binaries in globular clusters, previously elusive in the optical domain because of the high stellar density. These binaries are thought to be, at least in part, responsible for delaying the inevitable core collapse of globular clusters and their …

2006 • Advances in Space Research

XMM-Newton 1

The hard X-ray emission from the Vela pulsar wind nebula

DOI: 10.1016/j.asr.2005.10.045 Bibcode: 2006AdSpR..37.1984M

Cusumano, G.; Bocchino, F.; Mineo, T. +2 more

We present the results of a preliminary spectral analysis performed on the BeppoSAX and XMM observations of the Vela plerion. The broad energy range covered by the instruments on board the two observatories allows an evaluation of the spectral parameters of the high energy emission model and provides an indication on the morphology of the source e…

2006 • Advances in Space Research

XMM-Newton 1

The effect of a dense atmosphere on the tidally induced potential of Titan

DOI: 10.1016/j.icarus.2006.02.003 Bibcode: 2006Icar..183..230K

Karatekin, Özgür; van Hoolst, Tim

The effect of the dense atmosphere of Titan on the tidal variations of the external gravitational potential of degree two is quantified. The atmospheric tides perturb the external gravitational potential of Titan in two ways. First, the atmosphere itself contributes directly to the external gravitational potential with a period of 15.945 days. Sec…

2006 • Icarus

Cassini 1

Alfvénic turbulence in solar wind originating near coronal hole boundaries: heavy-ion effects?

DOI: 10.5194/angeo-24-785-2006 Bibcode: 2006AnGeo..24..785B

Bavassano, B.; Pietropaolo, E.; Bruno, R. +1 more

The mid-latitude phases of the Ulysses mission offer an excellent opportunity to investigate the solar wind originating near the coronal hole boundaries. Here we report on Alfvénic turbulence features, revealing a relevant presence of in-situ generated fluctuations, observed during the wind rarefaction phase that charaterizes the transition from f…

2006 • Annales Geophysicae

Ulysses 1

XMM-Newton spectroscopy of stars in open clusters and star forming regions

DOI: 10.1016/j.asr.2005.03.147 Bibcode: 2006AdSpR..38.1509P

Pallavicini, R.; Franciosini, E.; Sanz-Forcada, J. +2 more

We discuss observations of open clusters and star forming regions obtained with the RGS and EPIC instruments on board XMM-Newton. These observations provide a powerful tool to investigate the temperature structure, emission measure distribution and elemental abundances of stars from the pre-main sequence phase to post-main sequence evolution. We r…

2006 • Advances in Space Research

XMM-Newton 1

Ordered Fine Structure in the Radio Emission Observed by Cassini Cluster and Polar

Bibcode: 2006pre6.conf..265M

Kurth, W. S.; Menietti, J. D.

Cassini has observed ordered fine structure in the Saturn kilometric radiation (SKR) data that bears a strong resemblance to similar features observed by Polar and Cluster in the terrestrial auroral kilometric radiation (AKR) data. We investigate the possible role of electromagnetic ion cyclotron (EMIC) waves in stimulating the growth of AKR and p…

2006 • Planetary Radio Emissions VI

Cluster 1

Solar flares with and without SOHO/LASCO coronal mass ejections and type II shocks

DOI: 10.1016/j.asr.2005.11.003 Bibcode: 2006AdSpR..38.1007H

Hillaris, A.; Preka-Papadema, P.; Moussas, X. +10 more

We analyse of a set of radio rich (accompanied by type IV or II bursts) solar flares and their association with SOHO/LASCO Coronal Mass Ejections in the period 1998 2000. The intensity, impulsiveness and energetics of these events are investigated. We find that, on the average, flares associated both with type IIs and CMEs are more impulsive and m…

2006 • Advances in Space Research

SOHO 1