Search Publications
A Cosmologically Motivated Description of the Dark Matter Halo Profile for the Low Surface Brightness Galaxy, Malin 1
Seigar, Marc S.
In this paper we derive a possible mass profile for the low surface brightness galaxy, Malin 1, based upon previously published space-based and ground-based photometric properties and kinematics. We use properties of the bulge, normal disk, outer extended disk, and H i mass as inputs into mass profile models. We find that the dark matter halo mode…
Bifurcation of the tail current sheet and ion temperature anisotropy
Israelevich, P. L.; Ershkovich, A. I.
We investigated the relation between the geotail current sheet structure and the anisotropy of the ion temperature in the plasma sheet. Current density distribution in the geomagnetic tail is shown not to depend on the ratio between the parallel and perpendicular ion temperature. The tail current sheet bifurcation is controlled by non-gyrotropicit…
SMART-1 highlights and relevant studies on early bombardment and geological processes on rocky planets
Grande, M.; Koschny, D.; Mall, U. +16 more
We present results from SMART-1 science and technology payload, in the context of the Nobel symposium on 'Physics of Planetary Systems'. SMART-1 is Europe' first lunar mission (Foing et al 2000 LPSC XXXI Abstract #1677 (CDROM); Foing et al 2001 Earth, Moon Planets 85 86 523 31 Marini et al 2002 Adv. Space Res. 30 1895 900 Racca et al 2001 Earth Mo…
Power of magnetopause low-frequency waves: A statistical study
Belmont, G.; Lucek, E.; Rezeau, L. +2 more
ULF fluctuations at the Earth magnetopause have been the subject of a long-standing interest because of their noticeable amplitude and their potential role in plasma penetration through the magnetosphere boundary. Some information on the nature of these fluctuations has already been provided thanks to GEOS and ISEE, and more recently Cluster, case…
A mid-infrared study of H II regions in the Magellanic Clouds: N88 A and N160 A
Tielens, A. G. G. M.; Peeters, E.; Martín-Hernández, N. L.
Aims: To show the importance of high-spatial resolution observations of H II regions when compared with observations obtained with larger apertures such as ISO, we present mid-infrared spectra of two Magellanic Cloud H II regions, N88 A and N160 A.
Methods: We obtained mid-infrared (8-13 µm), long-slit spectra with TIMMI2 on the ESO 3.6 …
BVR photometry of Hyperion near the time of the 2005 Cassini encounter
Buratti, Bonnie J.; Hicks, Michael D.; Basilier, Erik N.
Six nights of BVR photometry and three nights of R photometry were collected over a month-long period shortly after the Cassini encounter with Hyperion on September 24 2005. Our observations were designed to help constrain the rotational state of the chaotically rotating satellite. Fourier analysis of our lightcurve data yields three possible peri…
A three-dimensional automated classification scheme for the TAUVEX data pipeline
Singh, Harinder P.; Murthy, Jayant; Gupta, Ranjan +3 more
In order to develop a pipeline for automated classification of stars to be observed by the Tel-Aviv University Ultra-Violet Experiment (TAUVEX) ultraviolet space telescope, we employ an artificial neural network (ANN) technique for classifying stars by using synthetic spectra in the ultraviolet (UV) region from 1250 to 3220 Å as the training set a…
Determination of the True Shape of Coronal Loops
Gontikakis, C.; Alissandrakis, C. E.; Dara, H. C.
Using line of sight velocity measurements from the SUMER and CDS instruments aboard SOHO, in conjunction with a simple geometrical model, we reconstructed the true, 3D shape and the velocity of plasma flow along coronal loops. The projection of the loop on the sky and the position of the footpoints define a family of curves. Assuming that the loop…
The X-ray source population of the Andromeda galaxy M 31
Pietsch, W.
First studies of the X-ray source population of M 31 were performed with the Einstein Observatory and ROSAT. High resolution Chandra Observatory images not only spatially resolved the center area but also supernova remnants (SNRs) in the galaxy. Source catalogues of restricted areas were presented with high astrometric accuracy. Also luminosity fu…
Reconstruction of time-varying reconnection rate and X-line location
Semenov, V. S.; Ivanov, I. B.; Kiehas, S. A. +2 more
Remote-sensing method developed on the basis of time-dependent Petschek-type reconnection model is applied to Cluster magnetotail measurements from 8 September 2002, where a series of earthward propagating NFTEs (nightside flux transfer events) was observed. The method utilizes single-spacecraft magnetic data as an input and provides the reconnect…