Search Publications
XMM-Newton Observations of the Radio-Loud Broad Absorption Line Quasar FBQS J131213.5+231958
Mathur, Smita; Dai, Xinyu
We present XMM-Newton observations of the broad absorption line (BAL) quasar FBQS J131213.5+231958. The X-ray spectrum of the source can be well described by an absorbed power-law model in which the absorber is either ionized or only partially covers the continuum source. This can explain the apparent lack of absorption observed in the Chandra spe…
Evolvement of the Ring Current During a Magnetic Storm: TC-2 Neutral Atom Imager Observations
Shen, Chao; Liu, Zhen-Xing; Lu, Li +3 more
A series of ENA images were obtained by the NUADU instrument aboard TC-2 during a strong, long duration magnetic storm that occurred in November 2004. This paper follows the evolution of the ring current during this magnetic storm. It is shown that the southward IMF Bz component plays a key role in facilitating ion injection from the magnetotail i…
Spectral behavior of AE Aqr between high and low states in the UV
Sanad, M. R.
We present ultraviolet spectra of the AE Aqr binary system taken by the International Ultraviolet Explorer (IUE) during the period from 1978 to 1993, to accomplish a large scale study of what happens to the ultraviolet fluxes of different emission lines during different orbital phases. Five profiles of AE Aqr binary system show variations of line …
Cluster Wideband Data Products in the Cluster Active Archive
Pickett, J. S.; Santolík, O.; Christopher, I. W. +2 more
Cluster Wideband Data (WBD) plasma wave receivers are mounted on all four of the Cluster spacecraft providing approximately 4-7% orbit coverage since mission operations began in February 2001. Data obtained by the WBD instruments are downlinked in real time to various Deep Space Network (DSN) and Panska Ves (PV) ground stations. The strengths of t…
Foreshock Turbulence
Narita, Yasuhito
Dispersion relations, wave number spectra, and a bispectrum are presented using measurements of four Cluster spacecraft in the Earth's foreshock region. These analyses suggest that the foreshock is in various turbulent states.
ULF Waves Associated with Periodical High Speed Flows in the Magnetotail Plasma Sheet
Cao, Jin-Bin; Wang, Zhi-Qiang
In this paper, using the data of Cluster satellites on 8 November 2004, we analyze the ULF waves associated with earthward periodical high speed flows in the magnetotail plasma sheet. The results show that the ULF waves in the magnetic field and temperature appear, enhance and end at the same times with those of periodical high speed ion flows. Pa…
Microvariability and fast variability of stars. II. The semiregular red giants L2 Pup, 2 Cen, η Gem, and σ Lib
Arkharov, A. A.; Ruban, E. V.
This is a study of the photometric magnitudes Vt and Bt of four semiregular red giants of spectral classes M3-M6 III, L2 Pup, 2 Cen, η Gem, and σ Lib, from the Hipparcos catalog to search for microvariability and rapid variations in their emission. It is shown that low amplitude variability shows up in the form of rapid changes in the b…
Adiabatic high degree modes of a rotating star. I. General features and real pressure modes
Fleck, B.; Schmitz, F.
Aims: The influence of the rotation of the Sun on non-radial p-modes with high wave numbers l is studied. To investigate and understand the basic properties of these modes, it is sufficient to consider only the outer layers of the Sun, which can be approximated by a plane layer with constant gravity.
Methods: We use a model with a smooth…
The outer atmospheric layers of the early M dwarf Gliese 1
Bessell, M. S.; Liebert, J.; Wehrse, R. +1 more
Using infrared and high-resolution optical observations of the M dwarf Gliese 1, we investigated the temperatures in the upper atmospheric layers of this star with low atmospheric activity. To fit the Hα and metal line profiles, the normal radiative equilibrium temperature decrease must be truncated at about log τ1.2µ≈-1.9 above w…
INTEGRAL and Cataclysmic Variables
Gális, R.; Hudec, R.; Blažek, M. +1 more
The results of investigations of cataclysmic variables (CVs) with the ESA INTEGRAL satellite are briefly presented and discussed. It is evident that the satellite serves as an efficient tool to study some of these objects.