Science Archives Publication System

Magnetically controlled structures in the ionosphere of Mars

DOI: 10.1029/2006JA011975 Bibcode: 2006JGRA..11112204D

Gurnett, D. A.; Persoon, A. M.; Averkamp, T. F. +5 more

The ionospheric sounding data obtained by the MARSIS (Mars Advanced Radar for Subsurface and Ionospheric Sounding) instrument on the Mars Express spacecraft show that the dayside ionosphere has considerable structure over regions of strong crustal magnetic fields. This structure is typically seen as a hyperbola-shaped trace in a display of echo in…

2006 • Journal of Geophysical Research (Space Physics)

MEx 90

X-ray properties in massive galaxy clusters: XMM-Newton observations of the REFLEX-DXL sample

DOI: 10.1051/0004-6361:20053650 Bibcode: 2006A&A...456...55Z

Zhang, Y. -Y.; Finoguenov, A.; Böhringer, H. +5 more

We selected an unbiased, flux-limited and almost volume-complete sample of 13 distant, X-ray luminous (DXL, z∼ 0.3) clusters and one supplementary cluster at z=0.2578 from the REFLEX Survey (the REFLEX-DXL sample). We performed a detailed study to explore their X-ray properties using XMM-Newton observations. Based on the precise radial distributio…

2006 • Astronomy and Astrophysics

XMM-Newton 90

Detectability of Planetary Characteristics in Disk-Averaged Spectra. I: The Earth Model

DOI: 10.1089/ast.2006.6.34 Bibcode: 2006AsBio...6...34T

Meadows, Victoria S.; Crisp, David; Bibring, Jean-Pierre +4 more

Over the next 2 decades, NASA and ESA are planning a series of space-based observatories to detect and characterize extrasolar planets. This first generation of observatories will not be able to spatially resolve the terrestrial planets detected. Instead, these planets will be characterized by disk-averaged spectroscopy. To assess the detectabilit…

2006 • Astrobiology

MEx 89

The host galaxy/AGN connection in nearby early-type galaxies. Is there a miniature radio-galaxy in every "core" galaxy?

DOI: 10.1051/0004-6361:20054031 Bibcode: 2006A&A...447...97B

Capetti, A.; Balmaverde, B.

This is the second of a series of three papers exploring the connection between the multiwavelength properties of AGN in nearby early-type galaxies and the characteristics of their hosts. We selected two samples with 5 GHz VLA radio flux measurements down to 1 mJy, reaching levels of radio luminosity as low as 10³⁶ erg s^-1. I…

2006 • Astronomy and Astrophysics

eHST 89

Masses of the local group and of the M81 group estimated from distortions in the local velocity field

DOI: 10.1007/s10511-006-0002-6 Bibcode: 2006Ap.....49....3K

Karachentsev, I. D.; Kashibadze, O. G.

Based on high precision measurements of the distances to nearby galaxies with the Hubble telescope, we have determined the radii of the zero velocity spheres for the local group, R₀ = 0.96±0.03Mpc, and for the group of galaxies around M 81/M 82, 0.89±0.05Mpc. These yield estimates of M_T = (1.29±0.14)· 10¹² M_⊙<…

2006 • Astrophysics

eHST 89

An updated survey of globular clusters in M 31. I. Classification and radial velocity for 76 candidate clusters

DOI: 10.1051/0004-6361:20065309 Bibcode: 2006A&A...456..985G

Bellazzini, M.; Galleti, S.; Federici, L. +2 more

Aims.We present the first results of a large spectroscopic survey of globular clusters and candidate globular clusters in the nearby M 31 galaxy. The survey is aimed at the classification of known candidate M 31 clusters and at the study of their kinematic properties.
Methods: .We obtained low-resolution spectroscopy (λ/Δλ ≃ 800-1300) for 133 …

2006 • Astronomy and Astrophysics

eHST 89

The Relation between EIT Waves and Solar Flares

DOI: 10.1086/503868 Bibcode: 2006ApJ...641L.153C

Chen, P. F.

In order to determine whether EIT waves are generated by coronal mass ejections (CMEs) or pressure pulses in solar flares, 14 non-CME-associated energetic flares, which should possess strong pressure pulses in their loops, are studied. They are selected near solar minimum, as this favors the detection of EIT waves. It is found that none of these f…

2006 • The Astrophysical Journal

SOHO 89

Cosmic evolution of the galaxy's mass and luminosity functions by morphological type from multi-wavelength data in the CDF-South

DOI: 10.1051/0004-6361:20054360 Bibcode: 2006A&A...453..397F

Berta, S.; Rodighiero, G.; Hatziminaoglou, E. +7 more

Aims.We constrain the evolution of the galaxy mass and luminosity functions from the analysis of (public) multi-wavelength data in the Chandra Deep Field South (CDFS) area, obtained from GOODS and other projects, including very deep high-resolution imaging by HST/ACS.
Methods.Our reference catalogue of faint high-redshift galaxies, which we hav…

2006 • Astronomy and Astrophysics

eHST 89

The dynamics behind Titan's methane clouds

DOI: 10.1073/pnas.0605074103 Bibcode: 2006PNAS..10318421M

Mitchell, J. L.; Pierrehumbert, R. T.; Frierson, D. M. W. +1 more

2006 • Proceedings of the National Academy of Science

Cassini 89

A Hubble Space Telescope Archival Survey of Feathers in Spiral Galaxies

DOI: 10.1086/506589 Bibcode: 2006ApJ...650..818L

Ostriker, Eve C.; La Vigne, Misty A.; Vogel, Stuart N.

We present a survey of spiral arm extinction substructures referred to as feathers in 223 spiral galaxies using Hubble Space Telescope WFPC2 images. The sample includes all galaxies in the RC3 catalog with cz<5000 km s^-1, B_T<15, i<60^deg, and types Sa-Sd with well-exposed broadband WFPC2 images. The detecti…

2006 • The Astrophysical Journal

eHST 89