Science Archives Publication System

On Solar Intermediate Drift Radio Bursts at Decimeter and Meter Wavelength

DOI: 10.1007/s11207-007-9036-0 Bibcode: 2007SoPh..245..327R

Mann, G.; Karlický, M.; Aurass, H. +2 more

Fiber - or intermediate drift - bursts are a continuum fine structure in some complex solar radio events. We present the analysis of such bursts in the X17 flare on 28 Oct. 2003. Based on the whistler wave model of fiber bursts we derive the 3D magnetic field structures that carry the radio sources in different stages of the event and obtain insig…

2007 • Solar Physics

SOHO 22

The long-term evolution and initial size of comets 46P/Wirtanen and 67P/Churyumov-Gerasimenko

DOI: 10.1111/j.1365-2966.2007.11553.x Bibcode: 2007MNRAS.376.1399G

Lamy, P. L.; Groussin, O.; Hahn, G. +2 more

We present a new method to study the long-term evolution of cometary nuclei in order to estimate their original size, and we consider the case of comets 46P/Wirtanen (hereafter 46P) and 67P/Churyumov-Gerasimenko (hereafter 67P). We calculate the past evolution of the orbital elements of both comets over 100000yr using a Bulirsch-Stoer integrator a…

2007 • Monthly Notices of the Royal Astronomical Society

Rosetta 22

GIADA: The Grain Impact Analyser and Dust Accumulator for the Rosetta space mission

DOI: 10.1016/j.asr.2006.12.048 Bibcode: 2007AdSpR..39..446C

Lopez Moreno, J. J.; Rodriguez, J.; Colangeli, L. +13 more

The ESA ROSETTA mission will perform a rendezvous with comet 67P/Churyumov-Gerasimenko and will follow and study it from about 3.25 AU to perihelion at 1.34 AU and, during the foreseen extended mission, up to 2 AU post-perihelion, in order to observe for the first time the onset of activity of a comet and to follow its evolution. The GIADA (Grain …

2007 • Advances in Space Research

Rosetta 22

A Study of Compact Radio Sources in Nearby Face-on Spiral Galaxies. II. Multiwavelength Analyses of Sources in M51

DOI: 10.1086/515573 Bibcode: 2007AJ....133.2559M

Schinnerer, E.; Kilgard, R. E.; Cowan, J. J. +2 more

We report the analysis of deep radio observations of the interacting galaxy system M51 from the Very Large Array, with the goal of understanding the nature of the population of compact radio sources in nearby spiral galaxies. We detect 107 compact radio sources, 64% of which have optical counterparts in a deep Hα Hubble Space Telescope image. Thir…

2007 • The Astronomical Journal

eHST 22

Imaging of star clusters in unperturbed spiral galaxies with the Advanced Camera for Surveys. I. The low luminosity galaxy NGC 45

DOI: 10.1051/0004-6361:20065852 Bibcode: 2007A&A...464..495M

Larsen, S. S.; Kissler-Patig, M.; Mora, M. D.

Context: Star clusters are present in almost all types of galaxies. Here we investigate the star cluster population in the low-luminosity, unperturbed spiral galaxy NGC 45, which is located in the nearby Sculptor group. Both the old (globular) and young star-cluster populations are studied.
Aims: Previous ground-based observ…

2007 • Astronomy and Astrophysics

eHST 22

Chandra Detections of Diffuse X-Ray Emission from Globular Clusters

DOI: 10.1093/pasj/59.4.727 Bibcode: 2007PASJ...59..727O

Kokubun, Motohide; Makishima, Kazuo; Yuasa, Takayuki +1 more

Using Chandra, extended X-ray emission was detected from the direction of 6 globular clusters: 47 Tucanae, NGC 6752, M 5, ω Centauri, M 80, and NGC 6266. These X-ray sources, extending to a few arcmin, are located 1'--6' away from the cluster centers, and some are found in the direction of cluster motion through the Galactic halo. All of these sou…

2007 • Publications of the Astronomical Society of Japan

XMM-Newton 22

Carbonates in Space: The Challenge of Low-Temperature Data

DOI: 10.1086/521390 Bibcode: 2007ApJ...668..993P

Mutschke, H.; Henning, Th.; Posch, Th. +1 more

Carbonates have repeatedly been discussed as possible carriers of stardust emission bands. However, the band assignments proposed so far were mainly based on room-temperature powder transmission spectra of the respective minerals. Since very cold calcite grains have been claimed to be present in protostars and in planetary nebulae (PNs) such as NG…

2007 • The Astrophysical Journal

ISO 22

The CoRoT primary target HD 52265: models and seismic tests

DOI: 10.1051/0004-6361:20066798 Bibcode: 2007A&A...471..885S

Vauclair, G.; Vauclair, S.; Laymand, M. +1 more

Aims:HD 52265 is the only known exoplanet-host star selected as a main target for the seismology programme of the CoRoT satellite. As such, it will be observed continuously during five months, which is of particular interest when studying planetary systems. This star was misclassified as a giant in the Bright Star Catalog, while it is more probabl…

2007 • Astronomy and Astrophysics

Hipparcos 22

Is There a High-Energy Particle Population in the Quiet Solar Corona?

DOI: 10.1086/512536 Bibcode: 2007ApJ...659.1682R

Doschek, G. A.; Feldman, U.; Ralchenko, Yu.

A study of spectra emitted by the quiet solar corona indicates that the majority of line intensities originating in low-lying levels are consistent with isothermal plasma of ~1.3×10⁶ K. Nevertheless, a number of line intensities and, in particular, those belonging to ions that are typical of higher temperatures are brighter than expecte…

2007 • The Astrophysical Journal

SOHO 22

Deconvolution of HST images of the Cloverleaf gravitational lens. Detection of the lensing galaxy and a partial Einstein ring

DOI: 10.1051/0004-6361:20066839 Bibcode: 2007A&A...470..467C

Magain, P.; Chantry, V.

Archival HST/NICMOS-2 images of the Cloverleaf gravitational lens (H1413+117), a quadruply-imaged quasar, were analysed with a new method derived from the MCS deconvolution algorithm (Magain et al. 1998). This method is based on an iterative process which simultaneously allows us to determine the Point Spread Function (PSF) and to perform a deconv…

2007 • Astronomy and Astrophysics

eHST 22