Search Publications
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.
Massive Star Formation in the LMC. I. N159 and N160 Complexes
Gehrz, Robert D.; Jones, Terry J.; Gordon, Michael S. +1 more
We present images and spectral energy distributions (SEDs) of massive young stellar objects (YSOs) in three star-forming H II regions of the Large Magellanic Cloud: N159A, N159 Papillon, and N160. We use photometry from SOFIA/FORCAST at 25.3-37.1 µm to constrain model fits to the SEDs and determine luminosities, ages, and dust content of the…
Infrared photometric study of SDSS selected narrow line Seyfert 1 galaxies
Chen, P. S.; Liu, J. Y.; Shan, H. G.
The infrared photometric study of SDSS selected Narrow Line Seyfert 1 Galaxies (NLS1s) is presented in this paper. We have made cross-identifications for such NLS1s with 2MASS and WISE observations. Finally 992 NLS1s have 2MASS and WISE counterparts. Comparisons of NLS1s with the Broad Line Seyfert 1 (BLS1s) and Seyfert 2 galaxies are made. It is …
Hubble Space Telescope observations of BALQSO Ton 34 reveal a connection between the broad-line region and the BAL outflow
Binette, L.; Bianchi, L.; Nicastro, F. +7 more
Ton 34 recently transitioned from non-absorbing quasar into a broad absorption line quasi-stellar object. Here, we report new HST-STIS observations of this quasar. Along with C IV absorption, we also detect absorption by NV+Lyα and possibly O VI+Lyβ. We follow the evolution of the C IV BAL, and find that, for the slower outflowing material, the ab…
Timing Analysis of V404 Cyg during Its Brightest Outburst with INTEGRAL/SPI
Jourdain, E.; Roques, J. P.; Rodi, J.
The outburst of V404 Cyg during the summer of 2015 reached unparalleled intensities at X-ray and soft gamma-ray energies with fluxes > 50 Crab in the 20-50 keV energy band. To date, studies in the hard X-ray/soft gamma-ray energy domain have focused primarily on the energy spectra. In this work, a timing analysis has been performed with INTEGRA…