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AKARI/IRC Broadband Mid-Infrared Data as an Indicator of the Star-Formation Rate
Buat, Véronique; Burgarella, Denis; Murata, Katsuhiro L. +5 more
AKARI/Infrared Camera (IRC) Point Source Catalog provides a large amount of flux data at S9W (9µm) and L18W (18µm) bands. With the goal of constructing Star-Formation Rate (SFR) calculations using IRC data, we analyzed an IR selected GALEX-SDSS-2MASS-AKARI(IRC/Far-Infrared Surveyor) sample of 153 nearby galaxies. The far-infrared fluxe…
Chandra and XMM-Newton view of the warm absorbing gas in Mrk 290
Zhang, S. N.; Longinotti, A. L.; Marshall, H. L. +3 more
We present a detailed analysis of the Chandra High Energy Transmission Grating Spectrometer (HETGS) and XMM-Newton high-resolution spectra of the bright Seyfert 1 galaxy, Mrk 290.
The Chandra HETGS spectra reveal complex absorption features that can be best described by a combination of three ionized absorbers. The outflow velocities of these…Internal dynamics of the galaxy cluster Abell 545. The ideal case where to study the simultaneous formation of a galaxy system and its brightest galaxy
Rossetti, M.; Eckert, D.; Boschin, W. +3 more
Context. The mechanisms giving rise to diffuse radio emission in galaxy clusters, and in particular their connection with cluster mergers, are still debated.
Aims: We seek to explore the internal dynamics of the cluster Abell 545, which has been shown to host a radio halo. Abell 545 is also peculiar for hosting in its center a very bright, re…
Three-dimensional spatial structures of solar wind turbulence from 10 000-km to 100-km scales
Glassmeier, K. -H.; Sahraoui, F.; Goldstein, M. L. +2 more
Using the four Cluster spacecraft, we have determined the three-dimensional wave-vector spectra of fluctuating magnetic fields in the solar wind. Three different solar wind intervals of Cluster data are investigated for this purpose, representing three different spatial scales: 10 000 km, 1000 km, and 100 km. The spectra are determined using the w…
Early-type stars observed in the ESO UVES Paranal Observatory Project - III. Sub-parsec and au-scale structure in the interstellar medium*
Fossati, L.; Keenan, F. P.; Smoker, J. V. +5 more
UVES interstellar observations from the Paranal Observatory Project are presented for early-type stars located in the line of sight to the nearby open clusters IC 2391 (Omni Vel) and NGC 6475 (M7), with spectroscopic resolution R∼ 80 000 and signal-to-noise ratios in the Ti ii (3383 Å), Ca ii K, CH+ (4232 Å), Na i D and K i (7698 Å) lin…
Responses of the ionospheric electric field to the sheath region of ICME: A case study
Wei, Y.; Zong, Q. -G.; Guo, J. +8 more
We have examined the response of ionospheric electric field to the ICME sheath with the coordinated ground- and space-based magnetic measurements during the initial phase of December 14, 2006 storm. The duskward IEF pulses enhanced the westward convection electrojet and the eastward equatorial ionospheric electric field. The in situ magnetic measu…
Evidence of surface wave on the dusk flank of Saturn's magnetopause possibly caused by the Kelvin-Helmholtz instability
Dougherty, M. K.; Lucek, E.; Masters, A. +1 more
Boundary waves on Saturn's dusk side magnetopause were identified from magnetopause crossings made by the Cassini spacecraft. These crossings occurred over a 48 h period from 14 July to 15 July 2007 when Cassini was on the inbound leg of revolution (Rev.) 48, and were located at around 17:00 SLT at low latitudes above the equatorial plane. The bou…
Improvements in Calibration of GSO Scintillators in the Suzaku Hard X-Ray Detector
Enoto, Teruaki; Fukazawa, Yasushi; Kokubun, Motohide +26 more
Improvements of the in-orbit calibration of GSO scintillators in the Hard X-ray Detector aboard Suzaku are reported. To resolve an apparent change in the energy scale of GSO, which appeared across the launch for unknown reasons, consistent and thorough re-analyses of both pre-launch and in-orbit data have been performed. With laboratory experiment…
IRAS 15099-5856: Remarkable Mid-infrared Source with Prominent Crystalline Silicate Emission Embedded in the Supernova Remnant MSH15-52
Kohno, Kotaro; Onaka, Takashi; Yun, Min S. +18 more
We report new mid-infrared (MIR) observations of the remarkable object IRAS 15099-5856 using the space telescopes AKARI and Spitzer, which demonstrate the presence of prominent crystalline silicate emission in this bright source. IRAS 15099-5856 has a complex morphology with a bright central compact source (IRS1) surrounded by knots, spurs, and se…
Searching for Needles in Haystacks—Looking for Gamma-ray Burst γ-rays with the Fermi/LAT Detector
Zheng, W.; Pandey, S. B.; McKay, T. A. +1 more
Since the launch of the Fermi Gamma-ray Space Telescope on 2008 June 11, 55 gamma-ray bursts (GRBs) have been observed at coordinates that fall within 66° of the Fermi Large Area Telescope (LAT) boresight with precise localizations provided by the NASA Swift mission or other satellites. Imposing selection cuts to exclude low Galactic latitudes and…