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Characteristic Scales of Chromospheric Oscillation Wave Packets
McIntosh, Scott W.; Smillie, Darren G.
We use wavelet transforms to study the characteristic time scales of chromospheric oscillation ``wave packets'' that are observed in Transition Region and Coronal Explorer (TRACE) ultraviolet continuum image time series. Using several data sets, we investigate the statistical, spatial, and temporal intermittence of the number, duration, mean frequ…
XMM-Newton study of the very young stellar cluster IC 348
Preibisch, T.; Zinnecker, H.
We analyze a XMM-Newton X-ray imaging observation of the very young stellar cluster IC 348 with an observing time of 12 h and a corresponding total (all detector) MOS-equivalent exposure time of 207 ks. Our observation is strongly affected by a very intense solar particle flare, due to which only the first half of the exposure time can be used for…
An X-Ray Investigation of the NGC 346 Field in the Small Magellanic Cloud. III. XMM-Newton Data
Corcoran, Michael F.; Stevens, Ian R.; Nazé, Yaël +2 more
We present new XMM-Newton results on the field around the NGC 346 star cluster in the SMC. This continues and extends previously published work on Chandra observations of the same field. The two XMM-Newton observations were obtained, respectively, 6 months before and 6 months after the previously published Chandra data. Of the 51 X-ray sources det…
Two long-period X-ray pulsars detected in the SMC field around XTE J0055-727
Pietsch, W.; Haberl, F.; Schartel, N. +2 more
An XMM-Newton target of opportunity observation of the field around the transient 18.37 s pulsar
FUSE Spectroscopy of the Large Magellanic Cloud Supernova Remnant N49
Blair, William P.; Raymond, John C.; Sankrit, Ravi
Strong C III λ977 and O VI λλ1032, 1038 emission lines are detected in Far Ultraviolet Spectroscopic Explorer (FUSE) spectra of N49, the brightest optical supernova remnant in the Large Magellanic Cloud. Shocks with velocities ranging from less than 130 to more than 180 km s-1 are responsible for these emission lines and are present ove…
Correlation between suprathermal electron bursts, broadband extremely low frequency waves, and local ion heating in the midaltitude cleft/low-latitude boundary layer observed by Cluster
Balogh, A.; RèMe, H.; Fazakerley, A. N. +9 more
The Cluster spacecraft often cross the midaltitude cleft/cusp and observe a very well defined "electron-only cleft" region consisting of electron injections without magnetosheath ions. This region contains soft suprathermal (<500 eV) electron bursts in antifield and/or field-aligned directions. We present an example of such observations which s…
On comparing estimates of low-l solar p-mode frequencies from Sun-as-a-star and resolved observations
Chaplin, W. J.; Elsworth, Y.; Appourchaux, T. +3 more
Low-angular-degree (low-l) solar p modes provide a sensitive probe of the radiative interior and core of the Sun. Estimates of their centroid frequencies can be used to constrain the spherically symmetric structure of these deep-lying layers. The required data can be extracted from two types of observation: one where the modes are detected in inte…
XMM-Newton Observation of the Double Pulsar System J0737-3039
Campana, Sergio; Possenti, Andrea; Burgay, Marta
We report on a 50 ks XMM-Newton observation of the double pulsar system J0737-3039 performed in 2004 April. We present results of the spectral analysis of these data combined with the much shorter Chandra pointing performed in 2004 January. Blackbody emission with an effective temperature of 0.20+0.02-0.02 keV (90% confidence…
Anisotropy and Alfvénicity of hourly fluctuations in the fast polar solar wind
Neugebauer, M.
Ulysses magnetic and plasma data obtained in the fast polar solar wind are used to study the nature of fluctuations in the frequency range between the turbulent inertial range and the lower-frequency range dominated by quasi-static structures originating at the Sun. For daily variations of hourly averages of the magnetic field components the aniso…
On the observed disc temperature of accreting intermediate mass black holes
Fabian, A. C.; Miller, J. M.; Ross, R. R.
Some ultraluminous X-ray sources in nearby galaxies show soft components resembling thermal disc emission. Calculations based on blackbody emission then indicate that the accreting black holes at the centres of these discs have masses of hundreds to thousands solar mass. Establishing the existence of such intermediate mass black holes is of consid…