Science Archives Publication System

XMM-NEWTON High resolution spectroscopy of NGC 5548

DOI: 10.1051/0004-6361:20030261 Bibcode: 2003A&A...402..477S

Kaastra, J. S.; Steenbrugge, K. C.; de Vries, C. P. +1 more

We analyze a 137 ks exposure X-ray spectrum of the Seyfert 1 galaxy NGC 5548 obtained with the XMM-Newton Reflection Grating Spectrometer. Due to the long exposure time, the spectrum is of higher statistical quality than the previous observations of this AGN. Therefore, we detect for the first time in NGC 5548 inner-shell transitions from O Iii to…

2003 • Astronomy and Astrophysics

XMM-Newton 105

An Imaging Survey of Early-Type Barred Galaxies

DOI: 10.1086/367885 Bibcode: 2003ApJS..146..299E

Erwin, Peter; Sparke, Linda S.

This paper presents the results of a high-resolution imaging survey, using both ground-based and Hubble Space Telescope images, of a complete sample of nearby barred S0-Sa galaxies in the field, with a particular emphasis on identifying and measuring central structures within the bars: secondary bars, inner disks, nuclear rings and spirals, and of…

2003 • The Astrophysical Journal Supplement Series

eHST 104

An Extensive Census of Hubble Space Telescope Counterparts to Chandra X-Ray Sources in the Globular Cluster 47 Tucanae. I. Astrometry and Photometry

DOI: 10.1086/378193 Bibcode: 2003ApJ...596.1177E

Heinke, Craig O.; Gilliland, Ronald L.; Edmonds, Peter D. +1 more

We report in this study of 47 Tucanae the largest number of optical identifications of X-ray sources yet obtained in a single globular cluster. Using deep Chandra ACIS-I imaging and extensive Hubble Space Telescope studies with Wide Field Planetary Camera 2 (WFPC2; including a 120 orbit program giving superb V and I images), we have detected optic…

2003 • The Astrophysical Journal

eHST 104

Chandra X-Ray Observatory Observations of the Globular Cluster M28 and Its Millisecond Pulsar PSR B1821-24

DOI: 10.1086/376967 Bibcode: 2003ApJ...594..798B

Pavlov, George G.; Weisskopf, Martin C.; Tennant, Allyn F. +8 more

We report here the results of the first Chandra X-Ray Observatory observations of the globular cluster M28 (NGC 6626). We detect 46 X-ray sources, of which 12 lie within 1 core radius of the center. We show that the apparently extended X-ray core emission seen with the ROSAT HRI is due to the superposition of multiple discrete sources, for which w…

2003 • The Astrophysical Journal

eHST 104

The Black Hole Masses and Host Galaxies of BL Lacertae Objects

DOI: 10.1086/345083 Bibcode: 2003ApJ...583..134B

Ho, Luis C.; Barth, Aaron J.; Sargent, Wallace L. W.

We have measured the central stellar velocity dispersion in the host galaxies of 11 BL Lac objects with redshifts z<=0.125. The range of velocity dispersions, ~170-370 km s^-1, is similar to that of nearby radio galaxies. Using the correlation between stellar velocity dispersion and black hole mass defined for nearby galaxies, we deri…

2003 • The Astrophysical Journal

eHST 103

Source regions and storm effectiveness of frontside full halo coronal mass ejections

DOI: 10.1029/2002JA009606 Bibcode: 2003JGRA..108.1234Z

Webb, D. F.; Zhao, X. P.

Full halo coronal mass ejections (CMEs) erupting from the side of the Sun facing Earth, i.e., frontside full halo CMEs, are considered to be a likely cause of major, transient geomagnetic storms. However, this hypothesis has not been tested over a full solar cycle. We compare all frontside full halo CMEs observed during the first half of solar cyc…

2003 • Journal of Geophysical Research (Space Physics)

SOHO 103

ISO spectroscopy of star formation and active nuclei in the luminous infrared galaxy NGC 6240

DOI: 10.1051/0004-6361:20031165 Bibcode: 2003A&A...409..867L

Lutz, D.; Genzel, R.; Sturm, E. +4 more

We present Infrared Space Observatory mid- and far-infrared spectroscopy of the merging galaxy NGC 6240, an object presenting many aspects of importance for the role of star formation and AGN activity in [ultra]luminous infrared galaxies. The mid-infrared spectrum shows starburst indicators in the form of low excitation fine-str…

2003 • Astronomy and Astrophysics

ISO 103

A study of coronal abundances in RS CVn binaries%

DOI: 10.1051/0004-6361:20021737 Bibcode: 2003A&A...398.1137A

Raassen, A. J. J.; Mewe, R.; Audard, M. +2 more

We present XMM-Newton data of several RS CVn binary systems. High-resolution X-ray spectra obtained with the Reflection Grating Spectrometers have been interpreted simultaneously with the European Photon Imaging Camera spectra. Highly active stars show a depletion of elements with a low first ionization potential (FIP) relative to high-FIP element…

2003 • Astronomy and Astrophysics

XMM-Newton 103

Geminga's Tails: A Pulsar Bow Shock Probing the Interstellar Medium

DOI: 10.1126/science.1086973 Bibcode: 2003Sci...301.1345C

Caraveo, P. A.; Bignami, G. F.; Mereghetti, S. +5 more

We report the X-ray Multimirror Mission-Newton European Photon Imaging Camera observation of two elongated parallel x-ray tails trailing the pulsar Geminga. They are aligned with the object's supersonic motion, extend for ~2', and have a nonthermal spectrum produced by electron-synchrotron emission in the bow shock between the pulsar wind and the …

2003 • Science

XMM-Newton 102

Star Formation at z~6: i-Dropouts in the Advanced Camera for Surveys Guaranteed Time Observation Fields

DOI: 10.1086/377477 Bibcode: 2003ApJ...595..589B

Ford, H. C.; Infante, L.; Zheng, W. +33 more

Using an i-z dropout criterion, we determine the space density of z~6 galaxies from two deep ACS GTO fields with deep optical-IR imaging. A total of 23 objects are found over 46 arcmin², or ~0.5+/-0.1 objects arcmin^-2 down to z_AB~27.3 (6 σ), or a completeness-corrected ~0.5+/-0.2 objects arcmin^-2 down to…

2003 • The Astrophysical Journal

eHST 102