Science Archives Publication System

Deep ISOPHOT far-infrared imaging of M 86

DOI: 10.1051/0004-6361:20021496 Bibcode: 2003A&A...397..503S

Fabian, A. C.; Bregman, J. N.; Elmegreen, D. M. +2 more

Deep far-infrared (FIR) imaging data obtained with ISOPHOT at 60 µm, 90 µm, 150 µm, and 180 µm reveal a complex FIR morphology of the Virgo cluster elliptical M 86 (NGC 4406). A close pair of sources is associated with the centre of the M 86 galaxy and optically discovered dust streamers. Both components have a cold FIR spe…

2003 • Astronomy and Astrophysics

ISO 16

An XMM-Newton Observation during the 2000 Outburst of SAX J1808.4-3658

DOI: 10.1086/373984 Bibcode: 2003ApJ...588..425W

Wijnands, Rudy

I present an XMM-Newton observation of the accretion-driven millisecond X-ray pulsar SAX J1808.4-3658 during its 2000 outburst. The source was conclusively detected, albeit at a level of only ~2×10³² ergs s^-1. The source spectrum could be fitted with a power-law model (with a photon index of ~2.2), a neutron star atmosphere m…

2003 • The Astrophysical Journal

XMM-Newton 16

The corona of HD 223460 (HR 9024)

DOI: 10.1051/0004-6361:20030978 Bibcode: 2003A&A...409..263G

Gondoin, P.

HD 223460 (HR 9024), a chromospherically active late-type giant with a high X-ray luminosity, was observed by the XMM-Newton space observatory. Series of lines of highly ionized Fe and several Lyman lines of hydrogen-like ions and triplet lines of helium-like ions are visible in the reflection grating spectra, most notably from O and Ne. Analysis …

2003 • Astronomy and Astrophysics

XMM-Newton 16

Solar Coronal Heating and the Magnetic Flux Content of the Network

DOI: 10.1086/376359 Bibcode: 2003ApJ...593..549F

Falconer, D. A.; Moore, R. L.; Porter, J. G. +1 more

We investigate the heating of the quiet corona by measuring the increase of coronal luminosity with the amount of magnetic flux in the underlying network at solar minimum when there were no active regions on the face of the Sun. The coronal luminosity is measured from Fe IX/X-Fe XII pairs of coronal images from SOHO/EIT, under the assumption that …

2003 • The Astrophysical Journal

SOHO 16

A Unique Small-Scale Gravitational Arc in A1201

DOI: 10.1086/381193 Bibcode: 2003ApJ...599L..69E

Smith, Graham P.; Treu, Tommaso; van Dokkum, Pieter G. +4 more

We present a snapshot Hubble Space Telescope (HST) image of the galaxy cluster A1201 (z=0.169), revealing a tangential arc 2" from the brightest cluster galaxy (BCG). Keck Echelle Spectrograph and Imager (ESI) spectroscopy confirms that the arc is gravitational in nature and that the source galaxy lies at z=0.451. We construct a model of the gravi…

2003 • The Astrophysical Journal

eHST 16

Mass and Dust in the Disk of a Spiral Lens Galaxy

DOI: 10.1086/378637 Bibcode: 2003ApJ...597..672W

Hall, Patrick B.; Winn, Joshua N.; Schechter, Paul L.

Gravitational lensing is a potentially important probe of spiral galaxy structure, but only a few cases of lensing by spiral galaxies are known. We present Hubble Space Telescope and Magellan observations of the two-image quasar PMN J2004-1349, revealing that the lens galaxy is a spiral galaxy. One of the quasar images passes through a spiral arm …

2003 • The Astrophysical Journal

eHST 16

Shock emission in the bipolar post-AGB star IRAS 16594-4656

DOI: 10.1051/0004-6361:20030724 Bibcode: 2003A&A...406..773V

van Hoof, P. A. M.; Van de Steene, G. C.

In this paper we study the near-infrared emission spectrum of IRAS 16594-4656, a bipolar post-AGB star with spectral type B7 and no observed ionization. Using optical and near-infrared photometry we determined the total extinction towards this object to be A_V= 7.5+/-0.4 mag and derived a distance of 2.2+/-0.4 kpc, assuming a luminosity …

2003 • Astronomy and Astrophysics

eHST 16

Solar Large-Scale Channeled Dimmings Produced by Coronal Mass Ejections

DOI: 10.1134/1.1554517 Bibcode: 2003ARep...47..139C

Grechnev, V. V.; Chertok, I. M.

A new type of dimmings, or transient coronal holes (i.e., regions of reduced soft-X-ray and EUV emission), is revealed in analyses of difference solar images obtained with the SOHO EIT ultraviolet telescope at 195 Å. Such features can be observed on the solar disk after halo-type coronal mass ejections (CMEs). If several active regions, filaments,…

2003 • Astronomy Reports

SOHO 16

Sizes of quiet Sun transition region structures

DOI: 10.1051/0004-6361:20030940 Bibcode: 2003A&A...408..743G

Peter, H.; Gontikakis, C.; Dara, H. C.

We studied the morphology of the transition region of the quiet Sun, with data obtained by the Solar Ultraviolet Measurements of Emitted Radiation spectrometer (SUMER) and the Extreme-Ultraviolet Imaging Telescope (EIT), in September 1996. We analyzed lines emitted in the chromosphere, the low transition region and the low corona. We computed the …

2003 • Astronomy and Astrophysics

SOHO 16

Evidence for a Flux Rope driven EUV wave and CME: Comparison with the Piston Shock Model

DOI: 10.1051/0004-6361:20021820 Bibcode: 2003A&A...399..749F

Foley, C. R.; Culhane, J. L.; Harra, L. K. +2 more

This paper examines the relationship between a coronal wave, filament eruption, flare and Coronal Mass Ejection (CME) which occurred on 2001, April 10th. We study the pre-flare activity which includes the eruption of a filament and a coronal wave. A large X-ray flare and a CME follow. We discuss how these phenomena are related and compare our resu…

2003 • Astronomy and Astrophysics

SOHO 16