Science Archives Publication System

A Young White Dwarf Companion to Pulsar B1620-26: Evidence for Early Planet Formation

DOI: 10.1126/science.1086326 Bibcode: 2003Sci...301..193S

Richer, Harvey B.; Hansen, Brad M.; Stairs, Ingrid H. +2 more

The pulsar B1620-26 has two companions, one of stellar mass and one of planetary mass. We detected the stellar companion with the use of Hubble Space Telescope observations. The color and magnitude of the stellar companion indicate that it is an undermassive white dwarf (0.34 +/- 0.04 solar mass) of age 480 × 10⁶ +/- 140 × 10⁶

2003 • Science

eHST 214

Direct Detection of a Coronal Mass Ejection-Associated Shock in Large Angle and Spectrometric Coronagraph Experiment White-Light Images

DOI: 10.1086/379098 Bibcode: 2003ApJ...598.1392V

Wu, S. T.; Howard, R. A.; Vourlidas, A. +2 more

The Large Angle and Spectrometric Coronagraph Experiment (LASCO) C2 and C3 coronagraphs recorded a unique coronal mass ejection (CME) on 1999 April 2. The event did not have the typical three-part CME structure and involved a small-filament eruption without any visible overlying streamer ejecta. The event exhibited an unusually clear signature of …

2003 • The Astrophysical Journal

SOHO 212

The Structure and Dynamics of Luminous and Dark Matter in the Early-Type Lens Galaxy of 0047-281 at z = 0.485

DOI: 10.1086/345423 Bibcode: 2003ApJ...583..606K

Treu, Tommaso; Koopmans, Léon V. E.

We have measured the kinematic profile of the early-type (E/S0) lens galaxy in the system 0047-281 (z=0.485) with the Echelle Spectrograph and Imager (ESI) on the W. M. Keck II Telescope, as part of the Lenses Structure and Dynamics (LSD) Survey. The central velocity dispersion is σ=229+/-15 km s^-1, and the dispersion profile is nearly …

2003 • The Astrophysical Journal

eHST 211

Advanced Camera for Surveys Photometry of the Cluster RDCS 1252.9-2927: The Color-Magnitude Relation at z = 1.24

DOI: 10.1086/379234 Bibcode: 2003ApJ...596L.143B

Ford, H. C.; Demarco, R.; Infante, L. +20 more

We investigate the color-magnitude (CM) relation of galaxies in the distant X-ray-selected cluster RDCS 1252.9-2927 at z=1.24 using images obtained with the Advanced Camera for Surveys on the Hubble Space Telescope in the F775W and F850LP bandpasses. We select galaxies based on morphological classifications extending about 3.5 mag down the galaxy …

2003 • The Astrophysical Journal

eHST 208

Identification of Solar Sources of Major Geomagnetic Storms between 1996 and 2000

DOI: 10.1086/344611 Bibcode: 2003ApJ...582..520Z

Zhang, J.; Bothmer, V.; Howard, R. A. +1 more

This paper presents identification of solar coronal mass ejection (CME) sources for 27 major geomagnetic storms (defined by disturbance storm timeindex<=-100 nT) occurring between 1996 and 2000. Observations of CMEs and their solar surface origins are obtained from the Large Angle and Spectrometric Coronagraph (LASCO) and the EUV Imaging Telesc…

2003 • The Astrophysical Journal

SOHO 207

XMM-Newton observation of the brightest X-ray flare detected so far from Sgr A*

DOI: 10.1051/0004-6361:20030983 Bibcode: 2003A&A...407L..17P

Goldoni, P.; Grosso, N.; Decourchelle, A. +5 more

We report the high S/N observation on October 3, 2002 with XMM-Newton of the brightest X-ray flare detected so far from Sgr A* with a duration shorter than one hour ( ~ 2.7 ks). The light curve is almost symmetrical with respect to the peak flare, and no significant difference between the soft and hard X-ray range is detected. T…

2003 • Astronomy and Astrophysics

XMM-Newton 201

The [C II] 158 Micron Line Deficit in Ultraluminous Infrared Galaxies Revisited

DOI: 10.1086/376965 Bibcode: 2003ApJ...594..758L

Lutz, D.; Genzel, R.; Sturm, E. +5 more

We present a study of the [C II] 157.74 µm fine-structure line in a sample of 15 ultraluminous infrared (IR) galaxies (IR luminosity L_IR>=10¹²L_solar ULIRGs) using the Long Wavelength Spectrometer (LWS) on the Infrared Space Observatory (ISO). We confirm the observed order of magnitude deficit (compared to …

2003 • The Astrophysical Journal

ISO 200

Microlensing Optical Depth toward the Galactic Bulge from Microlensing Observations in Astrophysics Group Observations during 2000 with Difference Image Analysis

DOI: 10.1086/375212 Bibcode: 2003ApJ...591..204S

Sumi, T.; Honda, M.; Saito, Y. +27 more

We analyze the data of the gravitational microlensing survey carried out by the Microlensing Observations in Astrophysics (MOA) group during 2000 toward the Galactic bulge (GB). Our observations are designed to detect efficient high-magnification events with faint source stars and short-timescale events, by increasing the sampling rate up to ~6 ti…

2003 • The Astrophysical Journal

eHST 197

The Properties of Small Magnetic Regions on the Solar Surface and the Implications for the Solar Dynamo(s)

DOI: 10.1086/345792 Bibcode: 2003ApJ...584.1107H

Title, Alan M.; Schrijver, Carolus J.; Hagenaar, Hermance J.

We find that bipolar active regions that emerge onto the Sun's surface are part of a smoothly decreasing frequency distribution that spans almost 4 orders of magnitude in flux and 8 orders of magnitude in frequency. Distributions of emergence latitude and dipole orientation narrow from nearly uniform for the smallest observed ephemeral regions (~5…

2003 • The Astrophysical Journal

SOHO 196

Current sheet flapping motion and structure observed by Cluster

DOI: 10.1029/2002GL016500 Bibcode: 2003GeoRL..30.1327S

Balogh, A.; Zhang, T. L.; André, M. +8 more

Fast vertical flapping oscillations of the plasma sheet have been observed by Cluster on September 26, 2001. The flapping motion had vertical speeds exceeding 100 km/s, an amplitude in excess of 1 R_E and a quasiperiod of ~3 min. The current sheet was mostly tilted in the Y-Z plane (with the tilt sometimes exceeding 45°). The waves had t…

2003 • Geophysical Research Letters

Cluster 196