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Bright stars observed by FIMS/SPEAR
Edelstein, Jerry; Jo, Young-Soo; Choi, Yeon-Ju +5 more
In this paper, we present a catalogue of the spectra of bright stars observed during the sky survey using the Far-Ultraviolet Imaging Spectrograph (FIMS), which was designed primarily to observe diffuse emissions. By carefully eliminating the contamination from the diffuse background, we obtain the spectra of 70 bright stars observed for the first…
Imaging cosmic polarization rotation
Contaldi, Carlo R.
We introduce a method to isolate the contribution of parity-violating modes to the peak constrained correlation function. This method can be used as a local estimate of polarization rotation. We test this method using simulations and by applying it to Planck maps [P. A. R. Ade et al., arXiv:1502.01589 astro.ph.co]. We obtain a constraint on the mo…
A Road Map for the Generation of a Near-Infrared Guide Star Catalog for Thirty Meter Telescope Observations
Subramaniam, Annapurni; Simard, Luc; Subramanian, Smitha +5 more
The near-infrared instruments in the upcoming Thirty Meter Telescope (TMT) will be assisted by a multi conjugate Adaptive Optics (AO) system. For the efficient operation of the AO system, during observations, a near-infrared guide star catalog which goes as faint as 22 mag in JVega band is essential and such a catalog does not exist. A …
Characterizing elusive, faint dusty star-forming galaxies: a lensed, optically undetected ALMA galaxy at z 3.3
Berta, S.; Daddi, E.; Elbaz, D. +19 more
We present the serendipitous ALMA detection of a faint submillimeter galaxy (SMG) lensed by a foreground z 1 galaxy. By optimizing the source detection to deblend the system, we accurately build the full spectral energy distribution of the distant galaxy from the I814 band to radio wavelengths. It is extremely red, with a I-K colour larger than 2.…
Statistics of the field-aligned currents at the high-latitude energetic electron boundaries in the nightside: Cluster observation
Fu, S. Y.; Zong, Q. G.; Zhang, Hui +4 more
Magnetic field disturbances with a clear bipolar signature are frequently observed when the Cluster spacecraft fleet passes through both southern and northern high-latitude energetic electron boundaries at the nightside magnetosphere. The dominant variation of the bipolar signature is in the azimuthal direction of the local mean field-aligned coor…
Spectral Variations of the Sky: Constraints on Alternate Universes
Chary, R.
The fine tuning of parameters required to reproduce our present day universe suggests that our universe may simply be a region within an eternally inflating super-region. Many other regions beyond our observable universe would exist with each such region governed by a different set of physical parameters. Collision between these regions, if they o…
Thin energetic O+ layer embedded in the magnetotail reconnection current sheet observed by Cluster
Sun, W. J.; Fu, S. Y.; Zong, Q. G. +6 more
In the classical picture of the magnetotail current sheet, the current carriers are mainly ions that undergo nonadiabatic motions. Oxygen ions could contribute a thicker current sheet than the protons due to their large gyroradii. In this paper, however, we report a thin energetic O+ layer embedded in the magnetotail proton current shee…
A spiral galaxy's mass distribution uncovered through lensing and dynamics
van de Ven, Glenn; Dutton, Aaron A.; Trick, Wilma H.
We investigate the matter distribution of a spiral galaxy with a counter-rotating stellar core, SDSS J1331+3628 (J1331), independently with gravitational lensing and stellar dynamical modelling. By fitting a gravitational potential model to a quadruplet of lensing images around J1331's bulge, we tightly constrain the mass inside the Einstein radiu…
Origin of circular collapsed landforms in the Chryse region of Mars
Kleinhans, Maarten G.; Zegers, Tanja E.; Roda, Manuel +1 more
The quasi-circular collapsed landforms occurring in the Chryse region of Mars share similar morphological characteristics, such as depth of collapse and polygonally fractured floors. Here, we present a statistical analysis of diameter, maximum and minimum depth, and amount of collapse of these features. Based on their morphometric characteristics,…
The variable V381 Lac and its possible connection with the R CrB phenomenon
Dell'Agli, F.; Nesci, R.; Rossi, C. +2 more
We have performed new medium resolution spectroscopy, optical and near-infrared photometry to monitor the variability of the asymptotic giant branch (AGB) carbon star V 381 Lac. Our observations revealed rapid and deep changes in the spectrum and extreme variability in the optical and near-infrared bands. Most notably we observed the change of Na …