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Sunlight refraction in the mesosphere of Venus during the transit on June 8th, 2004
Rondi, S.; Sütterlin, P.; Tanga, P. +6 more
Many observers in the past gave detailed descriptions of the telescopic aspect of Venus during its extremely rare transits across the Solar disk. In particular, at the ingress and egress, the portion of the planet’s disk outside the Solar photosphere has been repeatedly perceived as outlined by a thin, bright arc (“aureole”). Those historical visu…
XMM-Newton view of the N 206 superbubble in the Large Magellanic Cloud
Kavanagh, P. J.; Sasaki, M.; Points, S. D.
Aims: We perform an analysis of the X-ray superbubble in the N 206 H ii region in the Large Magellanic Cloud using current generation facilities to gain a better understanding of the physical processes at work in the superbubble and to improve our knowledge of superbubble evolution.
Methods: We used XMM-Newton observations of the N 206 r…
Multi-frequency observations of SNR J0453-6829 in the LMC. A composite supernova remnant with a pulsar wind nebula
Pietsch, W.; Haberl, F.; Filipović, M. D. +7 more
Context. The Large Magellanic Cloud (LMC) is rich in supernova remnants (SNRs), which can be investigated in detail with radio, optical, and X-ray observations. SNR J0453-6829 is an X-ray and radio-bright remnant in the LMC, within which previous studies revealed the presence of a pulsar wind nebula (PWN), making it one of the most interesting SNR…
The O2 nightglow in the martian atmosphere by SPICAM onboard of Mars-Express
Gondet, B.; Reberac, A.; Montmessin, F. +5 more
We present observations of the O2(a1Δg) nightglow at 1.27 µm on Mars using the SPICAM IR spectrometer onboard of the Mars Express orbiter. In contrast to the O2(a1Δg) dayglow that results from the ozone photodissociation, the O2(a1Δg) nightglow…
Overview of Lutetia's surface composition
Sierks, H.; Barucci, M. A.; Fornasier, S. +10 more
All available data regarding compositionally diagnostic measurements of asteroid (21) Lutetia are assembled. We review ground-based observations together with recent spacecraft mission (Rosetta, Herschel and Spitzer) measurements. The aim of this paper is to gather all the pieces of the Lutetia puzzle, in order to derive the most probable surface …
Spatial distribution and kinematics of OB stars
Gontcharov, G. A.
The sample of 37 485 suspected OB stars selected by Gontcharov (2008) from the Tycho-2 catalogue has been cleaned of the stars that are not of spectral types OV-A0V. For this purpose, the apparent magnitude V T from Tycho-2, the absolute magnitude M_{V_T } calibrated as a function of the dereddened color index ( B T - V <…
Kinetic models of current sheets with a sheared magnetic field
Malova, H. V.; Popov, V. Yu.; Zelenyi, L. M. +5 more
Thin current sheets, whose existence in the Earth's magnetotail is confirmed by numerous spacecraft measurements, are studied analytically and numerically. The thickness of such sheets is on the order of the ion Larmor radius, and the normal component of the magnetic field (Bz) in the sheet is almost constant, while the tangential (B
The Illumination and Growth of CRL 2688: An Analysis of New and Archival Hubble Space Telescope Observations
Frank, Adam; Corradi, Romano L. M.; Balick, Bruce +3 more
We present four-color images of CRL 2688 obtained in 2009 using the Wide-Field Camera 3 on Hubble Space Telescope. The F606W image is compared with archival images in very similar filters to monitor the proper motions of nebular structure. We find that the bright N-S lobes have expanded uniformly by 2.5% and that the ensemble of rings has translat…
A predator-prey model for moon-triggered clumping in Saturn's rings
Colwell, Joshua E.; Esposito, Larry W.; Sremčević, Miodrag +4 more
UVIS occultation data show clumping in Saturn's F ring and at the B ring outer edge, indicating aggregation and disaggregation at these locations that are perturbed by Prometheus and by Mimas. The inferred timescales range from hours to months. Occultation profiles of the edge show wide variability, indicating perturbations by local mass aggregati…
Characterization of the Distribution of the Lyα Emitters in the 53w002 Field at z = 2.4
Yamada, T.; Matsuda, Y.; Hayashino, T. +2 more
We present the results of our wide-field narrowband imaging of the field around the radio galaxy 53W002 at z = 2.390 with Subaru/Suprime-Cam. A custom-made filter, NB413, centered at 4140 Å with a width of 83 Å is used to observe the 31' × 24' area around the radio galaxy. We detected 204 Lyα emitters (LAEs) at z = 2.4 with a rest-frame equivalent…