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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…
Influence of the magnetic field on the density distribution of solar wind protons and cometary ions in the shock layer ahead of cometary ionospheres
Baranov, V. B.; Alexashov, D. B.
The "mass loading" of the solar wind by cometary ions produced by the photoionization of neutral molecules outflowing from the cometary nucleus plays a major role in the interaction of the solar wind with cometary atmospheres. In particular, this process leads to a decrease in the solar wind velocity with a transition from supersonic velocities to…
Cosmic sculpture: a new way to visualise the cosmic microwave background
Clements, D. L.; Sato, S.; Portela Fonseca, A.
3D printing presents an attractive alternative to visual representation of physical datasets such as astronomical images that can be used for research, outreach or teaching purposes, and is especially relevant to people with a visual disability. We here report the use of 3D printing technology to produce a representation of the all-sky cosmic micr…
Direct detection of gaps in Saturn's A ring
Esposito, Larry W.; Albers, Nicole; Brown, Zarah L. +1 more
Indirect observations spanning decades have indicated that Saturn's A ring is populated with a plethora of self-gravity wakes, small wavelike structures that arise from the gravitational attraction between ring particles. We present the direct detection of the gaps that represent the minima between the denser wakes. Through a statistical test, we …
Orbit of the mercury-manganese binary 41 Eridani
Hubrig, S.; Hummel, C. A.; Schöller, M. +1 more
Context. Mercury-manganese (HgMn) stars are a class of slowly rotating chemically peculiar main-sequence late B-type stars. More than two-thirds of the HgMn stars are known to belong to spectroscopic binaries.
Aims: By determining orbital solutions for binary HgMn stars, we will be able to obtain the masses for both components and the distanc…
Nonlinear evolution of 3D whistler waves in space plasmas
Sharma, R. P.; Pathak, Neha; Yadav, Nitin
The present model is proposed to study the nonlinear effects related to quasi-transverse 3D whistler waves in three different regions of space plasmas which are Earth's radiation belt, magnetopause, and solar wind plasma at 1 A.U. We have analysed the effect of considering the third dimension in the dynamics of whistler waves on Localization of wh…
X-Ray Temperatures, Luminosities, and Masses from XMM-Newton Follow-upof the First Shear-selected Galaxy Cluster Sample
Hughes, John P.; Wittman, David; Deshpande, Amruta J.
We continue the study of the first sample of shear-selected clusters from the initial 8.6 square degrees of the Deep Lens Survey (DLS); a sample with well-defined selection criteria corresponding to the highest ranked shear peaks in the survey area. We aim to characterize the weak lensing selection by examining the sample’s X-ray properties. There…