Science Archives Publication System

IGR J16318-4848: An X-ray Source in a Dense Envelope?

DOI: 10.1134/1.1607496 Bibcode: 2003AstL...29..587R

Gilfanov, M. R.; Sunyaev, R. A.; Sazonov, S. Yu. +1 more

We analyze in detail the ASCA observations of the hard X-ray source IGR J16318-4848, which was recently discovered by the INTEGRAL observatory (Courvoisier et al. 2003). The source has an anomalously hard spectrum in the energy range 0.5-10 keV and is virtually undetectable below 4 keV because of strong photoabsorption (n_H L > 4 x 10²³

2003 • Astronomy Letters

INTEGRAL 39

Simultaneous observations of solar transition region blinkers and explosive events by SUMER, CDS and BBSO. Are blinkers, explosive events and spicules the same phenomenon?

DOI: 10.1051/0004-6361:20030397 Bibcode: 2003A&A...403..731M

Doyle, J. G.; Madjarska, M. S.

The SoHO discovery of the new ``blinker'' phenomena focused our study on the search of its relation to already known phenomena such as explosive events and spicules. The study was performed using a specially planned joint observing program involving the Coronal Diagnostic Spectrometer (CDS), Solar Ultraviolet Measurements of Emitted Radiation spec…

2003 • Astronomy and Astrophysics

SOHO 39

Coronal mass ejections: Initiation and detection

DOI: 10.1016/S0273-1177(02)00888-8 Bibcode: 2003AdSpR..31..869G

Gopalswamy, N.

Coronal mass ejections (CMEs) are large-scale magnetic structures expelled from the Sun due to MHD processes involving interaction between plasma and magnetic field in closed field regions. I provide a summary of the observational signatures and current models on CME initiation. I also discuss the multiwavelength signatures of CMEs, which have hel…

2003 • Advances in Space Research

SOHO 39

Investigating the role of plasma topography on chromospheric oscillations observed by TRACE

DOI: 10.1051/0004-6361:20030627 Bibcode: 2003A&A...405..769M

Judge, P. G.; McIntosh, S. W.; Fleck, B.

We present the results of an investigation into the interaction of the topographic structure of the solar chromospheric plasma with the wave modes manifesting themselves in the UV continua formed there. We show that there is a distinct correlation between the inferred plasma topography, the phase-differences between and suppression of oscillations…

2003 • Astronomy and Astrophysics

SOHO 38

Ground-based Near-Infrared Imaging of the HD 141569 Circumstellar Disk

DOI: 10.1086/346019 Bibcode: 2003ApJ...585..494B

Augereau, J. -C.; Boccaletti, A.; Hahn, J. +1 more

We present the first ground-based near-infrared image of the circumstellar disk around the post-Herbig Ae/Be star HD 141569A initially detected with the Hubble Space Telescope (HST). Observations were carried out in the near-IR (2.2 µm) at the Palomar 200 inch telescope using the adaptive optics system PALAO. The main large-scale asymmetric …

2003 • The Astrophysical Journal

eHST 38

The Absorption and Emission Kinematics in the z=0.7450 Mg II Absorber toward Q1331+17

DOI: 10.1086/374660 Bibcode: 2003ApJ...589..709E

Ellison, Sara L.; Sawicki, Marcin; Mallén-Ornelas, Gabriela

We present a comparative analysis of the galaxy emission and quasar (QSO) absorption kinematics of a z_abs~0.7450 Mg II system and its candidate absorbing galaxy (G5) located 3.86" (28.3 h^-1₇₀ kpc) from the QSO. We have obtained a spectrum of the galaxy candidate, previously identified as a luminous edge-on disk, an…

2003 • The Astrophysical Journal

eHST 38

The hydrogen ortho-to-para ratio in the stratospheres of the giant planets

DOI: 10.1016/S0019-1035(02)00014-3 Bibcode: 2003Icar..161..127F

Lellouch, Emmanuel; Fouchet, Thierry; Feuchtgruber, Helmut

Observations of the H ₂ S(0) and S(1) quadrupole lines in the four giant planets by the short-wavelength spectrometer of the Infrared Space Observatory are analyzed. These lines probe pressure levels located between 10 and 1 mbar and allow us to determine the stratospheric hydrogen para fraction for the first time. In Jupiter and Saturn…

2003 • Icarus

ISO 38

Small Magellanic Cloud-Type Interstellar Dust in the Milky Way

DOI: 10.1086/378802 Bibcode: 2003ApJ...598..369V

Gordon, Karl D.; Clayton, Geoffrey C.; Valencic, Lynne A. +1 more

It is well known that the sight line toward HD 204827 in the cluster Trumpler 37 shows a UV extinction curve that does not follow the average Galactic extinction relation. However, when a dust component, foreground to the cluster, is removed, the residual extinction curve is identical to that found in the SMC within the uncertainties. The curve is…

2003 • The Astrophysical Journal

IUE 38

The discovery of a new non-thermal X-ray filament near the Galactic Centre

DOI: 10.1046/j.1365-8711.2003.06299.x Bibcode: 2003MNRAS.340..747S

Decourchelle, A.; Warwick, R. S.; Predehl, P. +1 more

We report the discovery by XMM-Newton and Chandra of a hard extended X-ray source (XMM J174540-2904.5) associated with a compact non-thermal radio filament (the Sgr A-E `wisp'= 1LC 359.888-0.086 = G359.88-0.07), which is located within ~4 arcmin of the Galactic Centre. The source position is also coincident with the peak of the molecular cloud M-0…

2003 • Monthly Notices of the Royal Astronomical Society

XMM-Newton 38

Long-term behaviour of space radiometers

DOI: 10.1088/0026-1394/40/1/314 Bibcode: 2003Metro..40S..60F

Fr Hlich, C.

2003 • Metrologia

SOHO 38