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A Study of Solar Radio Bursts with Fine Structures during Flare/CME Events
Huang, J.; Yan, Y. H.; Liu, Y. Y.
We have selected 27 solar microwave burst events recorded by the Solar Broadband Radio Spectrometer (SBRS) of China, which were accompanied by M/X class flares and fast CMEs. A total of 70.4% of radio burst events peak at 2.84 GHz before the peaks of the related flares' soft X-ray flux with an average time difference of about 6.7 minutes. Almost a…
Multiple cusps during an extended northward IMF period with a significant By component
Winningham, J. D.; Wing, S.; Balogh, A. +11 more
On 21-22 March 2001, four cusp-like regions were observed consecutively in about five hours by all four Cluster spacecraft when the interplanetary magnetic field (IMF) was northward with a significant By component. All four cusp-like encounters were characterized by turbulent magnetic fields, high-density plasma, and plasma flow signifi…
OMCat: Catalog of Serendipitous Sources Detected with the XMM-Newton Optical Monitor
Snowden, Steven L.; Kuntz, K. D.; Mushotzky, Richard F. +2 more
The Optical Monitor Catalog of serendipitous sources (OMCat) contains entries for every source detected in the publicly available XMM-Newton Optical Monitor (OM) images taken in either the imaging or “fast” modes. Since the OM is coaligned and records data simultaneously with the X-ray telescopes on XMM-Newton, it typically produces images in one …
INTEGRAL, XMM-Newton and ESO/NTT identification of AX J1749.1-2733: an obscured and probably distant Be/X-ray binary
Chaty, S.; Zurita Heras, J. A.
Context: AX J1749.1-2733 is an unclassified transient X-ray source discovered during surveys by ASCA in 1993-1999. The transient behaviour and the short and bright flares of the source have led to the idea that it is part of the recently revealed subclass of supergiant fast X-ray transients.
Aims: A multi-wavelength study in NIR, optical, X-ra…
Near-IR bispectrum speckle interferometry, AO imaging polarimetry, and radiative transfer modeling of the proto-planetary nebula Frosty Leonis
Weigelt, G.; Hofmann, K. -H.; Schertl, D. +4 more
Aims: We combined bispectrum speckle interferometry, adaptive optics (AO) imaging polarimetry, and radiative transfer modeling of polarized light to derive various physical properties of the proto-planetary nebula Frosty Leo.
Methods: We performed bispectrum K'-band speckle interferometry and H- and K-band imaging polarimetry of Frosty Leo usi…
XMM-Newton observations of the Small Magellanic Cloud: XMMU J004814.1-731003, a 25.55 s Be/X-ray binary pulsar
Pietsch, W.; Haberl, F.; Sasaki, M. +2 more
Aims: To investigate candidates for Be/X-ray binaries in the Small Magellanic Cloud (SMC), we observed a region around the emission nebula N19 with XMM-Newton in October 2006.
Methods: We analysed the EPIC data of the detected point sources to derive their spectral and temporal characteristics.
Results: We detected X-ray pulsations with a …
Asymmetric Ejecta Distribution of the Cygnus Loop Revealed with Suzaku
Miller, Eric D.; Katsuda, Satoru; Mori, Koji +4 more
We observed a linearly sliced area of the Cygnus Loop from the north-east to the south-west with Suzaku in seven pointings. After dividing the entire fields of view (FOV) into 119 cells, we extracted spectra from all of the cells and performed spectral analysis for them. We then applied both one- and two-component non-equilibrium ionization (NEI) …
Evidence for particle acceleration in the magnetospheric cusp
Chen, J.
New evidence reveals that the charged particles can be energized locally in the magnetospheric cusp. The power spectral density of the cusp magnetic fluctuations shows increases by up to four orders of magnitude in comparison to an adjacent region. Large fluctuations of the cusp electric fields have been observed with an amplitude of up to 350 mV/…
Unlensing HST observations of the Einstein ring 1RXS J1131-1231: a Bayesian analysis
Brewer, B. J.; Lewis, G. F.
We present a source and lens reconstruction for the optical Einstein ring gravitational lens system RXS J1131-1231. We resolve detail in the source, which is the host galaxy of a z = 0.658 quasar, down to a resolution of 0.045 arcsec (this is the size of the smallest conclusively resolved structures, rather than the pixel scale), using a Bayesian …
Properties of nuclear star clusters
Böker, Torsten
Over the last decade, HST imaging studies have revealed that the centers of most galaxies are occupied by massive, yet compact, stellar clusters. These 'nuclear star clusters' (NSCs) are found in a wide range of Hubble types, suggesting that their formation is intricately linked to galaxy evolution. In this review, I briefly summarize what has bee…