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In search of RR Lyrae type stars in eclipsing binary systems. OGLE052218.07-692827.4: an optical blend
Prša, A.; Guinan, E. F.; Devinney, E. J. +1 more
During the OGLE-2 operation, Soszynski et al. (2003) found 3 LMC candidates for an RR Lyr-type component in an eclipsing binary system. Two of those have orbital periods that are too short to be physically plausible and hence have to be optical blends. For the third, OGLE052218.07-692827.4, we developed a model of the binary that could host the ob…
Comparison of local energy conversion estimates from Cluster with global MHD simulations
Dandouras, I.; Buchert, S.; Vaivads, A. +3 more
The local energy conversion across the magnetopause has been estimated with Cluster for two magnetopause crossings. A load region, conversion from magnetic to particle energy, was identified on the dayside high-latitude magnetopause during south/dawnward IMF. Another crossing of the dawn flank magnetotail during dominantly duskward IMF was identif…
Near ultraviolet-infrared colours of red-sequence galaxies in local clusters
Hudson, Michael J.; Lucey, John R.; Smith, Russell J. +2 more
We present GALEX near-ultraviolet (NUV) and Two-Micron All-Sky Survey J-band photometry for red-sequence galaxies in local clusters. We define quiescent samples according to a strict emission threshold, removing galaxies with very recent star formation. We analyse the NUV-J colour-magnitude relation (CMR) and find that the intrinsic scatter is an …
Minor Ion Abundances in the Slow Solar Wind
Wurz, P.; Karrer, R.; Giammanco, C.
In this paper we report for the first time the absolute abundance of P (AP = 6.1 +/- 0.5), Al (AAl = 7.2 +/- 0.2), K (AK = 5.7 +/- 0.4), and Na (ANa = 6.5 +/- 0.3) in the slow solar wind for three wind speed ranges (380, 390, 400 km s-1, with a tolerance of ±2 km s-1) using 4 years …
GRB 070707: the first short gamma-ray burst observed by INTEGRAL
McGlynn, S.; McBreen, S.; Foley, S. +4 more
Context: INTEGRAL has observed 47 long-duration GRBs (T90 ≳ 2 s) and 1 short-duration GRB (T90 ≲ 2 s) in five years of observation since October 2002.
Aims: This work presents the properties of the prompt emission of GRB 070707, which is the first short hard GRB observed by INTEGRAL.
Methods: The spectral and temporal…
H I and CO in the circumstellar environment of the oxygen-rich AGB star RX Leporis
Winters, J. M.; Le Bertre, T.; Libert, Y. +1 more
Context: Circumstellar shells around AGB stars are built over long periods of time that may reach several million years. They may therefore be extended over large sizes ( 1 pc, possibly more), and different complementary tracers are needed to describe their global properties.
Aims: We set up a program to explore the properties of matter in the…
The efficient low-mass Seyfert MCG-05-23-016
Gehrels, N.; Petrucci, P. -O.; Shrader, C. R. +5 more
Aims: The Seyfert 1.9 galaxy MCG-05-23-016 has been shown to exhibit a complex X-ray spectrum. This source has moderate X-ray luminosity, hosts a comparably low-mass black hole, but accretes at a high Eddington rate, and allows us to study a super massive black hole in an early stage.
Methods: Three observations of the INTEGRAL satellite simul…
Central K-band kinematics and line strength maps of NGC 1399
Kuntschner, H.; Silva, D. R.; Lyubenova, M.
In this paper we present for the first time high spatial resolution K-band maps of the central kinematical and near-infrared spectral properties of the giant cD galaxy in the Fornax cluster, NGC 1399. We confirm the presence of a central velocity dispersion dip within r ≤ 0.2 arcsec seen in previous long-slit studies. Our velocity dispersion maps …
Cluster observations of the midaltitude cusp under strong northward interplanetary magnetic field
RèMe, H.; Fazakerley, A. N.; Owen, C. J. +3 more
We report on a multispacecraft cusp observation lasting more than 100 min. We determine the cusp boundary motion and reveal the effect on the cusp size of the interplanetary magnetic field (IMF) changing from southward to northward. The cusp shrinks at the beginning of the IMF rotation and it reexpands at the rate of 0.40° invariant latitude per h…
Radio Bursts Associated with Flare and Ejecta in the 13 July 2004 Event
Sakurai, T.; Pohjolainen, S.; Hori, K.
We investigate coronal transients associated with a GOES M6.7 class flare and a coronal mass ejection (CME) on 13 July 2004. During the rising phase of the flare, a filament eruption, loop expansion, a Moreton wave, and an ejecta were observed. An EIT wave was detected later on. The main features in the radio dynamic spectrum were a frequency-drif…