Science Archives Publication System

Characteristic magnetic field and speed properties of interplanetary coronal mass ejections and their sheath regions

DOI: 10.1029/2004JA010814 Bibcode: 2005JGRA..110.1105O

Owens, M. J.; Crooker, N. U.; Siscoe, G. L. +2 more

Prediction of the solar wind conditions in near-Earth space, arising from both quasi-steady and transient structures, is essential for space weather forecasting. To achieve forecast lead times of a day or more, such predictions must be made on the basis of remote solar observations. A number of empirical prediction schemes have been proposed to fo…

2005 • Journal of Geophysical Research (Space Physics)

SOHO 98

An HST Search for Supernovae Accompanying X-Ray Flashes

DOI: 10.1086/430405 Bibcode: 2005ApJ...627..877S

Cenko, S. B.; Peterson, B. A.; Price, P. A. +24 more

We present the results from a Hubble Space Telescope ACS search for supernovae associated with X-ray flashes 020903, 040701, 040812, and 040916. We find strong evidence that XRF 020903 (z=0.25) was associated with a SN 1998bw-like supernova and confirm this using optical spectroscopy at t~25 days. We find no evidence, however, for SN 1998bw-like s…

2005 • The Astrophysical Journal

eHST 97

Contribution of nonadiabatic ions to the cross-tail current in an O⁺ dominated thin current sheet

DOI: 10.1029/2004JA010653 Bibcode: 2005JGRA..110.6213K

Lundin, R.; Balogh, A.; Klecker, B. +8 more

During storm times, O⁺ can dominate both the pressure and the density in the plasma sheet. Because of the contribution from ion outflow, the plasma sheet is already oxygen-rich prior to substorm onset. At substorm onset the fraction of O⁺ contributing to the pressure and density increases. In the O⁺ dominated thin …

2005 • Journal of Geophysical Research (Space Physics)

Cluster 97

Global structure of Jupiter's magnetospheric current sheet

DOI: 10.1029/2004JA010757 Bibcode: 2005JGRA..110.7227K

Khurana, Krishan K.; Schwarzl, Hannes K.

Jupiter's magnetosphere contains a gigantic sheet-like structure located near its dipole magnetic equator that contains most of the plasma and energetic particles swirling in Jupiter's magnetosphere. Called the "current sheet," it behaves like a rigid structure inside a radial distance of ∼50 R_J where the periodic reversals of the B

2005 • Journal of Geophysical Research (Space Physics)

Ulysses 97

Kelu-1 Is a Binary L Dwarf: First Brown Dwarf Science from Laser Guide Star Adaptive Optics

DOI: 10.1086/496915 Bibcode: 2005ApJ...634..616L

Leggett, S. K.; Liu, Michael C.

We present near-infrared (1-2.4 µm) imaging of the L dwarf Kelu-1 obtained with the Keck sodium laser guide star adaptive optics (LGS AO) system as part of a high angular resolution survey for substellar binaries. Kelu-1 was one of the first free-floating L dwarfs identified, and the origin of its overluminosity compared to objects of simila…

2005 • The Astrophysical Journal

eHST 97

Magnetic Reconnection Rate and Flux-Rope Acceleration of Two-Ribbon Flares

DOI: 10.1086/427165 Bibcode: 2005ApJ...620.1085J

Lin, Jun; Xu, Yan; Qiu, Jiong +3 more

Forbes & Lin derived simple equations to link the properties of magnetic reconnection in the corona to observed signatures of solar flares. We measured the photospheric magnetic fields and the flare ribbon separation speeds then applied these equations to derive two physical terms for the magnetic reconnection rates: the rate of magnetic flux …

2005 • The Astrophysical Journal

SOHO 96

A spectroscopic study of the surfaces of Saturn's large satellites: H ₂O ice, tholins, and minor constituents

DOI: 10.1016/j.icarus.2004.09.003 Bibcode: 2005Icar..175..268C

Emery, Joshua P.; Cruikshank, Dale P.; Owen, Tobias C. +7 more

We present spectra of Saturn's icy satellites Mimas, Enceladus, Tethys, Dione, Rhea, and Hyperion, 1.0-2.5 µm, with data extending to shorter (Mimas and Enceladus) and longer (Rhea and Dione) wavelengths for certain objects. The spectral resolution ( R=λ/Δλ) of the data shown here is in the range 800-1000, depending on the specific instrumen…

2005 • Icarus

Cassini 96

The Magnetosheath

DOI: 10.1007/s11214-005-3825-2 Bibcode: 2005SSRv..118...95L

Sahraoui, F.; Lucek, E. A.; Walker, S. N. +5 more

2005 • Space Science Reviews

Cluster 96

Detection of Ne VIII in the Low-Redshift Warm-Hot Intergalactic Medium

DOI: 10.1086/429985 Bibcode: 2005ApJ...626..776S

Tripp, Todd M.; Sembach, Kenneth R.; Savage, Blair D. +2 more

High-resolution FUSE and STIS observations of the bright QSO HE 0226-4110 (z_em=0.495) reveal the presence of a multiphase absorption-line system at z_abs(OVI)=0.20701 containing absorption from H I (Lyα to Lyθ), C III, O III, O IV, O VI, N III, Ne VIII, Si III, S VI, and possibly S V. Single-component fits to the Ne VIII and O…

2005 • The Astrophysical Journal

eHST 96

Weak-Lensing Analysis of the z~=0.8 Cluster CL 0152-1357 with the Advanced Camera for Surveys

DOI: 10.1086/425912 Bibcode: 2005ApJ...618...46J

Ford, H. C.; Demarco, R.; Rosati, P. +5 more

We present a weak-lensing analysis of the X-ray-luminous cluster CL 0152-1357 at z~=0.84 using Hubble Space Telescope/Advanced Camera for Surveys (ACS) observations. The unparalleled resolution and sensitivity of ACS enable us to measure weakly distorted, faint background galaxies to the extent that the number density reaches ~175 arcmin^-2

2005 • The Astrophysical Journal

eHST 96