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Constraining the ionized gas evolution with CMB-spectroscopic survey cross-correlation
Ma, Yin-Zhe
We forecast the prospective constraints on the ionized gas model fgas (z) at different evolutionary epochs via the tomographic cross-correlation between kinetic Sunyaev-Zeldovich (kSZ) effect and the reconstructed momentum field at different redshifts. The experiments we consider are the Planck and CMB Stage-4 survey for CMB and the SDS…
Nowcasting and forecasting of the magnetopause and bow shock—A status update
Petrinec, S. M.; Rastaetter, L.; Redmon, R. J.
There has long been interest in knowing the shape and location of the Earth's magnetopause and of the standing fast-mode bow shock upstream of the Earth's magnetosphere. This quest for knowledge spans both the research and operations arenas. Pertinent to the latter, nowcasting and near-term forecasting are important for determining the extent to w…
Study of the early phase of a Coronal Mass Ejection driven shock in EUV images
Susino, Roberto; Frassati, Federica; Mancuso, Salvatore +1 more
The November 1st, 2014 prominence eruption (associated with a C2.7 class flare) resulted in a fast, partial-halo Coronal Mass Ejection (CME). During its early propagation, the CME produced a type II radio burst (seen by the Bruny Island Radio Spectrometer) starting around 04:57 UT when the front entered into the LASCO/C2 field of view (FOV) and th…
TYC 8241 2652 1 and the case of the disappearing disk: No smoking gun yet
Kraus, Stefan; Weigelt, Gerd; Sitko, Michael +12 more
Context. TYC8241 2652 1 is a young star that showed a strong mid-infrared (mid-IR, 8-25 µm) excess in all observations before 2008, which is consistent with a dusty disk. Between 2008 and 2010 the mid-IR luminosity of this system dropped dramatically by at least a factor of 30 suggesting a loss of dust mass of an order of magnitude or more. …
Measuring Filament Orientation: A New Quantitative, Local Approach
Green, C. -E.; Dawson, J. R.; Cunningham, M. R. +3 more
The relative orientation between filamentary structures in molecular clouds and the ambient magnetic field provides insight into filament formation and stability. To calculate the relative orientation, a measurement of filament orientation is first required. We propose a new method to calculate the orientation of the one-pixel-wide filament skelet…
Mass Outflow from Cool Giants in Symbiotic Stars
Shagatova, Natalia
Superwind evolution: the young starburst-driven wind galaxy NGC 2782
Stevens, Ian R.; Bravo-Guerrero, Jimena
We present results from a 30-ks Chandra observation of the important starburst galaxy NGC 2782, covering the 0.3-10 keV energy band. We find evidence of a superwind of small extent, which is likely in an early stage of development. We find a total of 27 X-ray point sources within a region of radius 2D25 of the galaxy centre and that are…
Determination of the Galaxy Cluster Orientation Using X-Ray Images by FOCAS Method
Tugay, A. V.; Shevchenko, S. Yu.
In our work we considered orientations of bright X-ray halos of the galaxy clusters (mainly Abell clusters). 78 appropriate clusters were selected using data from Xgal sample of extragalactic objects in XMM-Newton observation archive. Position angles and eccentricities of these halos were calculated applying FOCAS method. No privilegd orientations…
Dust scattering from the Taurus Molecular Cloud
Murthy, Jayant; Narayan, Sathya; Karuppath, Narayanankutty
We present an analysis of the diffuse ultraviolet emission near the Taurus Molecular Cloud based on observations made by the Galaxy Evolution Explorer. We used a Monte Carlo dust scattering model to show that about half of the scattered flux originates in the molecular cloud with 25 per cent arising in the foreground and 25 per cent behind the clo…
Titan: Bubbles in focus
Hanley, Jennifer
The seabed of Ligeia Mare, a hydrocarbon sea at the north pole of Titan, may be a favourable place for the separation of nitrogen and the creation of bubbles that then buoyantly rise to the sea's surface.