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Thermal model of the MUPUS penetrator
Spohn, T.; Banaszkiewicz, M.; Grygorczuk, J. +2 more
The insertion device for the MUPUS penetrator on Phylae, the lander to be set by the Rosetta mission on the nucleus of Tchurumov-Gerasimenko comet, will have to work in extreme environmental condition. The electronic unit inside the device should be kept at the temperature greater than ‑55 °C (220 K) in order to work properly. The expected tempera…
Looking for Discrete UV Absorption Features in the Early-Type Eclipsing Binaries µ1 Scorpii and AO Cassiopeiae
Sahade, J.; Kondo, Y.; Arias, M. L. +1 more
A search for discrete absorption components in the ultraviolet spectra of the early-type binaries µ1 Scorpii and AO Cassiopeiae has been undertaken by analyzing material secured with the International Ultraviolet Explorer satellite during an exclusively assigned interval of nearly 50 hr. While the spectra of µ1 Sc…
The Fine Guidance Sensor Orbit of the G4 Bright Giant HD 173764
Parsons, Sidney B.; Wasserman, Lawrence H.; Franz, Otto G.
TRANS and POS mode observations of the G4 IIa star β Scuti (HD 173764) have been made with a Hubble Space Telescope (HST) Fine Guidance Sensor (FGS3). This spectroscopic binary with a period of 833 days and an eccentricity of 0.36 offered hope of resolving the secondary stellar component and inferring the orbital inclination, distance, and masses,…
Unexpected vertical current sheets in the magnetotail associated with northward IMF
Petrukovich, A. A.; Balogh, A.; Glassmeier, K. -H. +2 more
Fast magnetic field polarity changes detected in the quiet magnetotail by a spacecraft are usually attributed to thin cross-tail current sheet crossings. On September 14, 2001, Cluster registered several such events. However the IMF was northward for the previous 24 h and the formation of a thin current sheet was very unlikely. The multi-point ana…
Preliminary Analysis of <Emphasis Type="BoldItalic">V</Emphasis> and <Emphasis Type="BoldItalic">Hp</Emphasis> Light Curves of 26 Carbon Miras
MikulÁšek, Zdeněk; GrÁf, TomÁš
Light variations of a representative sample of 26 more or less periodically variable carbon stars were analyzed on the basis of 2220 individual observations made by the Hipparcos satellite and 33 544 visual observations listed in AFOEV and VSOLJ databases within the interval JD = 2 448 000 (1988) ±6 cycles. We found the osculating linear ephemerid…
The deepest Hubble Space Telescope far-ultraviolet observations in the Large Magellanic Cloud
Brosch, Noah; Zurek, David; Shara, Michael +1 more
We present a new analysis of the deepest pure-ultraviolet (UV) observations with the highest angular resolution ever performed. A set of 12 exposures with the Hubble Space Telescope (HST) WFPC2 and F160BW filter obtained in parallel observing mode, which cover ~12 arcmin2 in the Large Magellanic Cloud (LMC), north of the bar and in the …
The X1 catalogue of positions and proper motions of faint stars around the ICRF sources
Fedorov, P. N.; Myznikov, A. A.
We present a new catalogue of faint astrometric reference stars around ICRF sources of northern hemisphere. The X1 catalogue is obtained at the Institute of Astronomy of the V. N. Karazin Kharkiv National University and contains about 1.3 million positions and proper motions of stars from 10^m to 19^m within 330 1° ×1° fields. Mean positions and p…
A Study of Orientation and Motion of Flux Transfer Events Observed at High-Latitude Dayside Magnetopause
Balogh, A.; Daly, P. W.; Reme, H. +4 more
This paper investigates 13 FTEs, which were detected by Cluster II in magnetosheath near the cusp region during February to March 2001. The orientation of the FTE tube axis is derived by virtue of minimum variance analysis (MVA) using magnetic field data from the four Cluster spacecraft. Of the 13 events, 6 axis directions are determined reliably,…
The field of IC 2602: Strömgren-Hβ photometry approach
Kaltcheva, N.; Jaeger, S.; Kaba Bah, M. +1 more
A homogeneous data-base collating all uvbyβ photometry available at present for O-B9 stars in the field of IC 2602 is presented. The characteristics of the field are studied. Four spatially coherent groups can be distinguished. A low reddened compact group located at 156±6 pc is identified with IC 2602, followed by background layers at 546±33 pc, …
The Exploration of the Heliosphere in Three Dimensions with Ulysses - A Case Study in International Cooperation
Fisk, L. A.