Science Archives Publication System

The Nascent Solar Wind: Origin and Acceleration

DOI: 10.1086/368409 Bibcode: 2003ApJ...588..566T

Romoli, Marco; Teriaca, Luca; Poletto, Giannina +1 more

High-speed solar wind is known to originate in polar coronal holes, which, however, are made up of two components: bright, high-density regions known as ``plumes'' and dark, weakly emitting low-density regions known as ``interplumes.'' Recent space observations have shown that the width of UV lines is larger in interplume regions, while observatio…

2003 • The Astrophysical Journal

SOHO 92

New insights to the photometric structure of Blue Compact Dwarf galaxies from deep Near-Infrared studies. I. Observations, surface photometry and decomposition of surface brightness profiles

DOI: 10.1051/0004-6361:20031147 Bibcode: 2003A&A...410..481N

Papaderos, P.; Noeske, K. G.; Fricke, K. J. +1 more

We have analyzed deep Near Infrared (NIR) broad band images for a sample of Blue Compact Dwarf Galaxies (BCDs), observed with the ESO NTT and Calar Alto 3.6 m telescopes. The data presented here allows for the detection and quantitative study of the extended stellar low-surface brightness (LSB) host galaxy in all sample BCDs. NIR surface brightnes…

2003 • Astronomy and Astrophysics

eHST 91

The Rotation of the Globular Cluster 47 Tucanae in the Plane of the Sky

DOI: 10.1086/376480 Bibcode: 2003AJ....126..772A

Anderson, Jay; King, Ivan R.

We have used the Hubble Space Telescope (HST) to measure the component of rotation of 47 Tuc in the plane of the sky, using background stars of the SMC as a reference. The rotation is comparable to that in the line of sight, showing that the axis of rotation of the cluster is considerably inclined. We also give an improved value of the absolute pr…

2003 • The Astronomical Journal

eHST 91

XMM-Newton and Chandra Observations of the Galaxy Group NGC 5044. II. Metal Abundances and Supernova Fraction

DOI: 10.1086/377256 Bibcode: 2003ApJ...595..151B

Buote, David A.; Brighenti, Fabrizio; Mathews, William G. +1 more

Using new XMM and Chandra observations, we present an analysis of the metal abundances of the hot gas within a radius of 100 kpc of the bright nearby galaxy group NGC 5044. Motivated by the inconsistent abundance and temperature determinations obtained by different observers for X-ray groups, we provide a detailed investigation of the systematic e…

2003 • The Astrophysical Journal

XMM-Newton 91

The Andromeda project. I. Deep HST-WFPC2 V, I photometry of 16 fields toward the disk and the halo of the M 31 galaxy. Probing the stellar content and metallicity distribution

DOI: 10.1051/0004-6361:20030455 Bibcode: 2003A&A...405..867B

Cacciari, C.; Bellazzini, M.; Federici, L. +2 more

We have obtained HST-WFPC2 F555W and F814W photometry for 16 fields in the vicinity of the luminous nearby spiral galaxy M 31, sampling the stellar content of the disk and the halo at different distances from the center, from ~ 20 to ~ 150 arcmin (i.e. ~ 4.5 to 35 kpc), down to limiting V and I magnitudes of ~ 27.

The Color-Magnitude Diagrams…

2003 • Astronomy and Astrophysics

eHST 90

A Search for Core-Collapse Supernova Progenitors in Hubble Space Telescope Images

DOI: 10.1086/345748 Bibcode: 2003PASP..115....1V

Van Dyk, Schuyler D.; Filippenko, Alexei V.; Li, Weidong

Identifying the massive progenitor stars that give rise to core-collapse supernovae (SNe) is one of the main pursuits of supernova and stellar evolution studies. Using ground-based images of recent, nearby SNe obtained primarily with the Katzman Automatic Imaging Telescope, astrometry from the Two Micron All Sky Survey, and archival images from th…

2003 • Publications of the Astronomical Society of the Pacific

eHST 90

The Chandra Deep Field North Survey. XV. Optically Bright, X-Ray-Faint Sources

DOI: 10.1086/376737 Bibcode: 2003AJ....126..575H

Hornschemeier, A. E.; Alexander, D. M.; Bauer, F. E. +7 more

We have analyzed optically bright, X-ray-faint [OBXF; i.e., log(f_X/f_R)<~-2] sources identified in an 178.9 arcmin² area having high exposure (greater than 1500 ks) within the Chandra Deep Field North 2 Ms survey. We find 43 OBXF sources in this area, making up ~15% of the X-ray sources above a 0.5-2 keV flux of …

2003 • The Astronomical Journal

eHST 90

Physical conditions in the planetary nebula Abell 30

DOI: 10.1046/j.1365-8711.2003.06289.x Bibcode: 2003MNRAS.340..253W

Barlow, M. J.; Liu, X. -W.; Wesson, R.

We have analysed optical spectra of two of the hydrogen-deficient knots (J1 and J3) in the born-again planetary nebula Abell 30, together with ultraviolet (UV) spectra of knots J3 and J4. We determine electron temperatures in the knots based on several diagnostics. The [OIII] nebular-to-auroral transition ratio yields temperatures of the order of …

2003 • Monthly Notices of the Royal Astronomical Society

eHST 90

The Ibis-Picsit detector onboard Integral

DOI: 10.1051/0004-6361:20031356 Bibcode: 2003A&A...411L.149L

Di Cocco, G.; Stephen, J. B.; Gianotti, F. +6 more

PICsIT is the high-energy detector layer of the IBIS Imager, composed of 4096 CsI(Tl) scintillator detectors 8.4 x 8.4x 300 mm in size with PhotoDiode readout. The detector operates in the 175 keV-20.4 MeV range and its data generation modes make it possible to collect information from single events and multiple coincident events. PICsIT is surrou…

2003 • Astronomy and Astrophysics

INTEGRAL 90

XMM-Newton discovery of an X-ray filament in Coma

DOI: 10.1051/0004-6361:20031319 Bibcode: 2003A&A...410..777F

Finoguenov, A.; Briel, U. G.; Henry, J. P.

XMM-Newton observations of the outskirts of the Coma cluster of galaxies confirm the existence of a soft X-ray excess claimed previously and show it comes from warm thermal emission. Our data provide a robust estimate of its temperature ( ~ 0.2 keV) and oxygen abundance ( ~ 0.1 solar). Using a combination of XMM-Newton and ROSAT All-Sky Survey dat…

2003 • Astronomy and Astrophysics

XMM-Newton 90