Search Publications
Solar Origin of the Radio Attributes of a Complex Type III Burst Observed on 11 April 2001
Klein, K. -L.; Kaiser, M. L.; Bougeret, J. -L. +4 more
We report here on the solar origin of distinctive radiation characteristics observed for a decametric type III solar radio burst that was associated with a major solar flare and CME on 11 April 2001. The associated decimeter (Ondřejov) and meter (Potsdam) wavelength emissions, as well as the GOES soft X-ray lightcurve, suggest that there were two …
The nearest X-ray emitting protostellar jet (HH 154) observed with Hubble
Liseau, R.; Micela, G.; Bonito, R. +4 more
Context: The jet coming from the YSO binary
First analyses of planar magnetic structures associated with the Halloween 2003 events from the Earth to Voyager 1 at 93 AU
Intriligator, Devrie S.; Horbury, Timothy S.; Rees, Adam
We perform the first analyses of planar magnetic structures beyond 5 AU. We also perform the first analyses of planar magnetic structures associated with the Halloween 2003 solar events. Our analyses show that planar magnetic structures (PMS) are associated with the interplanetary manifestation of the Halloween 2003 solar events over a wide range …
Near-Infrared Spectroscopy of Faint Companions around Young Stellar Objects Associated with the Taurus Molecular Cloud
Pyo, Tae-Soo; Tamura, Motohide; Hayashi, Masahiko +9 more
We have conducted near-infrared spectroscopy of 26 faint objects around young stellar objects in the Taurus molecular cloud. These objects were detected during a course of near-infrared coronagraphic searches for companions around 72 young stellar objects with the Subaru Telescope and the near-infrared coronagraph CIAO (coronagraphic imager with a…
Are Seyfert 2 Galaxies without Polarized Broad Emission Lines More Obscured?
Wang, Jun-Xian; Jiang, Peng; Shu, Xin-Wen
New XMM-Newton data of seven Seyfert 2 galaxies with optical spectropolarimetric observations are presented. An analysis of the 0.5-10 keV spectra shows that four Seyfert 2 galaxies with polarized broad lines (PBLs) are absorbed by NH<1024 cm-2, while two of three Seyfert 2 galaxies without PBLs show evidence of…
A search for rapid pulsations in the magnetic cool chemically peculiar star HD3980
Hubrig, S.; Kurtz, D. W.; Mathys, G. +2 more
The Ap star HD3980 appears to be a promising roAp candidate based on its fundamental parameters, leading us to search for rapid pulsations with the VLT UV-Visual Echelle Spectrograph (UVES). A precise Hipparcos parallax and estimated temperature of 8100K place HD3980 in the middle of the theoretical instability strip for rapidly oscillating Ap sta…
Simple stellar population models as probed by the Large Magellanic Cloud star cluster ESO 121-SC03
Mackey, A. D.; de Grijs, R.; Xin, Y. +2 more
The presence of blue straggler stars (BSs) in star clusters has proven a challenge to conventional simple stellar population (SSP) models. Conventional SSP models are based on the evolution theory of single stars. Meanwhile, the typical locations of BSs in the colour-magnitude diagram of a cluster are brighter and bluer than the main-sequence turn…
Multi-scale reconnections in a complex CME
Mandrini, C. H.; van Driel-Gesztelyi, L.; Culhane, J. L. +6 more
A series of three flares of GOES class M, M and C, and a CME were observed on 20 January 2004 occurring in close succession in NOAA 10540. Types II, III, and N radio bursts were associated. We use the combined observations from TRACE, EIT, Hα images from Kwasan Observatory, MDI magnetograms, GOES, and radio observations from Culgoora and Wind/ WAV…
Venus surface data extraction from VIRTIS/Venus Express measurements: Estimation of a quantitative approach
Drossart, Pierre; Piccioni, Giuseppe; Haus, Rainer +2 more
Nightside emission measurements of the Visible and Infrared Thermal Imaging Spectrometer (VIRTIS) on the Venus Express spacecraft were used to estimate the potential for surface data extraction. A selection of orbits over the northern hemisphere was performed for footprints that cover different scales of surface elevation variations. A correction …
Transition Region Velocity Oscillations Observed by EUNIS-06
Mathioudakis, M.; Keenan, F. P.; Jess, D. B. +3 more
Spectroscopic measurements of NOAA AR 10871, obtained with the Extreme Ultraviolet Normal Incidence Spectrograph (EUNIS) sounding rocket instrument on 2006 April 12, reveal velocity oscillations in the He II 303.8 Å emission line formed at T ≈ 5 × 104 K. The oscillations appear to arise in a bright active region loop arcade about 25