Science Archives Publication System

The Southern Proper Motion Program. III. A Near-Complete Catalog to V=17.5

DOI: 10.1086/383545 Bibcode: 2004AJ....127.3060G

Girard, Terrence M.; van Altena, William F.; López, Carlos E. +3 more

We present the third installment of the Yale/San Juan Southern Proper Motion Catalog, SPM3. Absolute proper motions, positions, and photographic BV photometry are given for roughly 10.7 million objects, primarily stars, down to a magnitude of V=17.5. The catalog covers an irregular area of 3700 deg², between the declinations of -20° and…

2004 • The Astronomical Journal

Hipparcos 59

On the origin of field-aligned beams at the quasi-perpendicular bow shock: multi-spacecraft observations by Cluster

DOI: 10.5194/angeo-22-2301-2004 Bibcode: 2004AnGeo..22.2301K

Balogh, A.; Kistler, L.; Kucharek, H. +6 more

Available from http://www.copernicus.org/site/EGU/annales/22/7/2301.htm?FrameEngine=false;

2004 • Annales Geophysicae

Cluster 59

Large impact features on middle-sized icy satellites

DOI: 10.1016/j.icarus.2004.05.009 Bibcode: 2004Icar..171..421M

Schenk, Paul M.; McKinnon, William B.; Moore, Jeffrey M. +2 more

All of the large impact features of the middle-sized icy satellites of Saturn and Uranus that were clearly observed by the Voyager spacecraft are described. New image mosaics and stereo-and-photoclinometrically-derived digital elevation models are presented. Landforms related to large impact features, such as secondary craters and possible antipod…

2004 • Icarus

Huygens 59

Differential velocity between solar wind protons and alpha particles in pressure balance structures

DOI: 10.1029/2003JA010274 Bibcode: 2004JGRA..109.3104Y

Sakurai, Takashi; Suess, Steven T.; Steinberg, John T. +1 more

Pressure balance structures (PBSs) are a common high-plasma beta feature in high-latitude, high-speed solar wind. They have been proposed as remnants of coronal plumes. If true, they should reflect the observation that plumes are rooted in unipolar magnetic flux concentrations in the photosphere and are heated as oppositely directed flux is advect…

2004 • Journal of Geophysical Research (Space Physics)

Ulysses 59

The 1998 May 2-3 Magnetic Cloud: An Interplanetary ``Highway'' for Solar Energetic Particles Observed with SOHO/ERNE

DOI: 10.1086/381575 Bibcode: 2004ApJ...600L..83T

Riihonen, Esa; Kocharov, Leon; Torsti, Jarmo

Using the Energetic and Relativistic Nuclei and Electron (ERNE) instrument on the Solar and Heliospheric Observatory (SOHO), we have measured the 17-22 MeV proton flux anisotropy during the 1998 May 2-3 solar energetic particle (SEP) event, when SOHO was inside a magnetic cloud associated with a previous coronal mass ejection (CME). The ability of…

2004 • The Astrophysical Journal

SOHO 58

Dynamical Mass Estimates for Five Young Massive Stellar Clusters

DOI: 10.1086/424538 Bibcode: 2004AJ....128.2295L

Brodie, Jean P.; Hunter, Deidre A.; Larsen, Søren S.

We have obtained high-dispersion spectra for four massive star clusters in the dwarf irregular galaxies NGC 4214 and NGC 4449, using the HIRES spectrograph on the Keck I telescope. Combining the velocity dispersions of the clusters with structural parameters and photometry from images taken with the Hubble Space Telescope, we estimate mass-to-ligh…

2004 • The Astronomical Journal

eHST 58

The Small Blue Straggler Star Population in the Dense Galactic Globular Cluster NGC 6752

DOI: 10.1086/425492 Bibcode: 2004ApJ...617.1296S

Sabbi, E.; Ferraro, F. R.; Rood, R. T. +1 more

We used high-resolution Hubble Space Telescope (HST)-WFPC2 and wide-field ground-based observations to construct a catalog of blue straggler stars (BSSs) that spans the entire radial extent of the globular cluster NGC 6752. The BSS sample is the most extensive ever obtained for this cluster. Although NGC 6752 is a high-density cluster with a large…

2004 • The Astrophysical Journal

eHST 58

The nuclei of comets 126P/IRAS and 103P/Hartley 2

DOI: 10.1051/0004-6361:20040073 Bibcode: 2004A&A...419..375G

Jorda, L.; Lamy, P.; Groussin, O. +1 more

We report the detection of the nucleus of 126P/IRAS and 103P/Hartley 2 with the Infrared Camera of the Infrared Space Observatory (ISOCAM). 126P/IRAS was observed on 12 November 1996, when it was at r_h=1.71 AU from the Sun and Δ=1.32 AU from the Earth. 103P/Hartley 2 was observed on 5 February 1998, when it was at r_h=1.21 AU from the Sun and Δ=0…

2004 • Astronomy and Astrophysics

ISO 58

NGC 604, the Scaled OB Association (SOBA) Prototype. I. Spatial Distribution of the Different Gas Phases and Attenuation by Dust

DOI: 10.1086/422925 Bibcode: 2004AJ....128.1196M

Mas-Hesse, J. M.; Pérez, E.; Maíz-Apellániz, J.

We have analyzed Hubble Space Telescope and ground-based data to characterize the different gas phases and their interaction with the massive young cluster in NGC 604, a giant H II region in M33. The warm ionized gas is made out of two components: a high-excitation, high surface brightness H II surface located at the faces of the molecular clouds …

2004 • The Astronomical Journal

eHST 58

X-Ray Observations of Stellar Clusters Near the Galactic Center

DOI: 10.1086/422307 Bibcode: 2004ApJ...611..858L

Yusef-Zadeh, F.; Law, C.

We report the first detection of X-ray emission from the Quintuplet star cluster and compare its X-ray emission to that of the Arches star cluster. Four point sources are significantly detected near the core of the Quintuplet cluster with a total absorption-corrected luminosity of ~1×10³³ ergs s^-1. Diffuse, thermal emission i…

2004 • The Astrophysical Journal

eHST 58