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Gas of 96 Planck Cold Clumps in the Second Quadrant
Liu, Tie; Wu, Yuefang; Meng, Fanyi +1 more
Ninety-six Planck cold dust clumps in the second quadrant were mapped with 12CO (1-0), 13CO (1-0), and C18O (1-0) lines at the 13.7 m telescope of Purple Mountain Observatory. 12CO (1-0) and 13CO (1-0) emissions were detected for all 96 clumps, while C18O (1-0) emissions were detect…
Gaussianization for fast and accurate inference from cosmological data
Peiris, Hiranya V.; Joachimi, Benjamin; Schuhmann, Robert L.
We present a method to transform multivariate unimodal non-Gaussian posterior probability densities into approximately Gaussian ones via non-linear mappings, such as Box-Cox transformations and generalizations thereof. This permits an analytical reconstruction of the posterior from a point sample, like a Markov chain, and simplifies the subsequent…
Global magnetohydrodynamic simulation of the 15 March 2013 coronal mass ejection event—Interpretation of the 30-80 MeV proton flux
Wu, S. T.; Vourlidas, Angelos; Wu, Chin-Chun +4 more
The coronal mass ejection (CME) event on 15 March 2013 is one of the few solar events in Cycle 24 that produced a large solar energetic particle (SEP) event and severe geomagnetic activity. Observations of SEP from the ACE spacecraft show a complex time-intensity SEP profile that is not easily understood with current empirical SEP models. In this …
Testing for new physics: neutrinos and the primordial power spectrum
Aslanyan, Grigor; Easther, Richard; Price, Layne C. +2 more
We test the sensitivity of neutrino parameter constraints from combinations of CMB and LSS data sets to the assumed form of the primordial power spectrum (PPS) using Bayesian model selection. Significantly, none of the tested combinations, including recent high-precision local measurements of H0 and cluster abundances, indicate a signal…
Improving the Flux Calibration in Reverberation Mapping by Spectral Fitting:Application to the Seyfert Galaxy MCG-6-30-15
Ho, Luis C.; Du, Pu; Hu, Chen +4 more
We propose a method for the flux calibration of reverberation mapping spectra, based on accurate measurement of [O III] λ5007 emission by spectral fitting. Our method can achieve better accuracy than the traditional method of Groningen & Wanders, allowing reverberation mapping measurements for objects with variability amplitudes as low as ∼5%.…
Hard X-Ray Emissions from Cassiopeia A Observed by INTEGRAL
Wang, Wei; Li, Zhuo
Cassiopeia A (Cas A), as the nearby young remnant of a core-collapse supernova, is the best candidate for astrophysical studies in supernova explosion and its environment. We studied the hard X-ray emission from Cas A using the 10 year data of INTEGRAL observations, and first detected non-thermal continuum emission from the source up to 220 keV. T…
Ionized gas kinematics within the inner kiloparsec of the Seyfert galaxy NGC 1365
Robinson, Andrew; Schnorr-Müller, Allan; Storchi-Bergmann, Thaisa +3 more
We observed the nuclear region of the galaxy NGC 1365 with the integral field unit of the Gemini Multi Object Spectrograph mounted on the GEMINI-South telescope. The field of view covers 13 × 6 arcsec2(1173 × 541 pc2) centred on the nucleus, at a spatial resolution of 52 pc. The spectral coverage extends from 5600 to 7000 Å, …
The clustering evolution of dusty star-forming galaxies
Baugh, Carlton M.; Cole, Shaun; Lacey, Cedric G. +1 more
We present predictions for the clustering of galaxies selected by their emission at far-infrared (FIR) and sub-millimetre wavelengths. This includes the first predictions for the effect of clustering biases induced by the coarse angular resolution of single-dish telescopes at these wavelengths. We combine a new version of the GALFORM model of gala…
MHD-Kinetic Transition in Imbalanced Alfvénic Turbulence
De Keyser, Johan; Voitenko, Yuriy
Alfvénic turbulence in space is usually imbalanced: amplitudes of waves propagating parallel and anti-parallel to the mean magnetic field {{\boldsymbol{B}}}0 are unequal. It is commonly accepted that the turbulence is driven by (counter-)collisions between these counter-propagating wave fractions. Contrary to this, we found a new ion-sc…
Ionospheric loss from Mars as predicted by hybrid particle simulations
Brecht, Stephen H.; Ledvina, Stephen A.; Bougher, Stephen W.
This paper reports the results of hybrid simulations of the Mars-solar wind interaction. The focus is on the loss rates of O+ and O2+ from the Martian ionosphere while examining the importance of including 3-D dimensional neutral atmospheres with their associated neutral winds. The simulation loss rates are found t…