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168 papers · 1 filter
The narrow, inner CO ring around the magnetic Herbig Ae star, HD 101412
C. R. Cowley, S. Hubrig, F. Castelli +1
We describe and model emission lines in the first overtone band of CO in the magnetic Herbig Ae star HD 101412. High-resolution CRIRES spectra reveal unusually sharp features which…
Fermi Detection of γ-ray emission from the M2 Soft X-ray Flare on 2010 June 12
Fermi GBM Collaboration, Fermi LAT Collaboration, B. R. Dennis +2
The GOES M2-class solar flare, SOL2010-06-12T00:57, was modest in many respects yet exhibited remarkable acceleration of energetic particles. The flare produced an ~50 s impulsive…
The Statistics of Cosmological Lyman-alpha Absorption
Dipak Munshi, Peter Coles, Matteo Viel
We study the effect of the non-Gaussianity induced by gravitational evolution upon the statistical properties of absorption in quasar (QSO) spectra. Using the generic hierarchical…
An XMM-Newton spatially-resolved study of metal abundance evolution in distant galaxy clusters
Alessandro Baldi, Stefano Ettori, Silvano Molendi +3
We present an XMM-Newton analysis of the X-ray spectra of 39 clusters of galaxies at 0.4<z<1.4, covering a temperature range of 1.5<=kT<=11 keV. We performed a spatially resolved s…
Multiphase, non-spherical gas accretion onto a black hole
Paramita Barai, Daniel Proga, Kentaro Nagamine
(Abridged) We investigate non-spherical behavior of gas accreting onto a central supermassive black hole performing simulations using the SPH code GADGET-3 including radiative cool…
Detection of very-high energy γ-ray emission from NGC 1275 by the MAGIC telescopes
MAGIC Collaboration, J. Aleksić, E. A. Alvarez +161
We report on the detection of very-high energy (VHE, E>100 GeV) gamma-ray emission from NGC 1275, the central radio galaxy of the Perseus cluster of galaxies. The source has been d…