Search Publications
CME-associated dimmings on the Sun observed with the EUV SPIRIT telescope on the CORONAS-F spacecraft
Slemzin, V.; Kuzin, S.; Chertok, I. +5 more
Based on observations with the EUV SPIRIT telescope aboard the CORONAS-F spacecraft, we analyze large-scale dimmings on the solar disk initiated by halo-type coronal mass ejections (CMEs). We address four powerful geo-effective eruptive events of November 4, 2001; October 28, 29, and November 18, 2003. The SOHO/EIT telescope did not observe the fi…
Development of a low energy ion source for ROSINA ion mode calibration
Altwegg, Kathrin; Balsiger, Hans; Rubin, Martin +1 more
The European Rosetta mission on its way to comet 67P/Churyumov-Gerasimenko will remain for more than a year in the close vicinity (1 km) of the comet. The two ROSINA mass spectrometers on board Rosetta are designed to analyze the neutral and ionized volatile components of the cometary coma. However, the relative velocity between the comet and the …
Composite spectra Paper 14: HR 1129, a long-period binary showing evidence of circumbinary material
Stickland, D. J.; Griffin, R. E. M.; Griffin, R. F.
HR 1129 is a 4.8-mag star in the constellation Camelopardus, strangely (in view of its brightness) lacking a constellation designation. It has long been known to exhibit a composite spectrum consisting of a late-type primary and an early-type secondary. The radial velocity of the primary is easily measured, and was announced as variable nearly 100…
Radio and Hard X-Ray Imaging Observations of the M5.7 Flare of 2002 March 14
Kundu, M. R.; Garaimov, V. I.; Schmahl, E. J.
We describe a flare of GOES class M5.7 that was observed simultaneously by RHESSI (Ramaty High Energy Solar Spectroscopic Imager) and NoRH (Nobeyama Radio Heliograph). The flare occurred in AR 9866 located near the disk center. The hard X-ray (HXR), microwave, EIT, and TRACE 195 Å observations indicate that the flaring region consisted of a comple…
The fundamental plane of quasars
Turnshek, David A.; Casertano, Stefano; Hamilton, Timothy S.
We present results from an archival study of 70 medium-redshift QSOs observed with the Wide Field Planetary Camera 2 on board the Hubble Space Telescope. The QSOs have magnitudes MV ⩽ -23 (total nuclear plus host light) and redshifts 0.06 ⩽ z ⩽ 0.46.
A close relationship between QSO host and nucleus is found by examining multiple p…Orbits and Differential Photometry for Visual Binaries A 1529, HU 610, and COU 2031
Docobo, José A.; Tamazian, Vakhtang S.
The first orbit for visual binary A 1529 and improved orbital elements for HU 610 and COU 2031 based on new speckle measurements with the 6 m telescope of the Special Astrophysical Observatory (Russia) are presented. On the basis of simultaneously obtained differential photometry data, individual masses and spectral types are roughly estimated. Th…
Cepheids in Multiple Systems: ADS 14859
Evans, Nancy Remage; Karovska, Margarita; Massa, Derck +3 more
We have attempted to resolve the system containing the Cepheid V1334 Cyg (=ADS 14859) using both the Faint Object Camera (FOC) and the Fine Guidance Sensor (FGS) on the Hubble Space Telescope, and also using ground-based speckle interferometry with 4 m class instruments. None of these approaches was successful, leading to upper limits of approxima…
The Double Star magnetic field investigation: Overview of instrument performance and initial results
Balogh, A.; Zhang, T. L.; Nakamura, R. +15 more
Double Star is a Chinese National Space Administration mission which augments the European Space Agency's Cluster mission by launching an additional two spacecraft; one into an equatorial orbit and one into a polar orbit. These orbits are carefully chosen to complement Cluster by maximising the opportunities for useful conjunctions when Double Sta…
A new method to investigate hyperspectral image cubes: An application of the wavelet transform
Gendrin, Aline; Bibring, Jean-Pierre; Langevin, Yves +1 more
Data analysis of the Observatoire pour la Minéralogie, l'Eau, les Glaces, et l'Activité (OMEGA), the imaging spectrometer aboard Mars Express, necessitates the use of techniques able to extract the relevant information of large data sets. Numerous efficient algorithms have already been developed for similar purposes for terrestrial imaging spectro…
X-ray Emission from the Pre-Main Sequence Systems FU Orionis and T Tauri
Güdel, Manuel; Audard, Marc; Briggs, Kevin +2 more
We present new results from recent X-ray observations of the accreting pre-main sequence stars FU Orionis and T Tauri. XMM-Newton observations of the close binary system FU Ori reveal an unusual X-ray spectrum consisting of a cool moderately-absorbed component and a hot component viewed through much higher absorption. The two components thus origi…