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Suzaku Observation of IRAS 00521-7054, a Peculiar Type-II AGN with a Very Broad Feature at 6 keV
Paltani, S.; Ricci, C.; Terashima, Y. +3 more
IRAS 00521-7054 is the first Seyfert 2 in which the presence of an extremely large Fe Kα line has been claimed. We report here on the analysis of a 100 ks Suzaku observation of the source. We confirm the existence of a very strong excess over the power-law X-ray continuum at E ~ 6 keV (EW ~= 800 eV), extending down to ~4.5 keV, and found that the …
Analytical Solution for Waves in Planets with Atmospheric Superrotation. I. Acoustic and Inertia-Gravity Waves
López-Valverde, M. A.; Imamura, T.; Peralta, J. +3 more
This paper is the first of a two-part study devoted to developing tools for a systematic classification of the wide variety of atmospheric waves expected on slowly rotating planets with atmospheric superrotation. Starting with the primitive equations for a cyclostrophic regime, we have deduced the analytical solution for the possible waves, simult…
Understanding the dynamical structure of pulsating stars. HARPS spectroscopy of the δ Scuti stars ρ Puppis and DX Ceti
Guiglion, G.; Poretti, E.; Rainer, M. +4 more
Context. High-resolution spectroscopy is a powerful tool to study the dynamical structure of a pulsating star's atmosphere.
Aims: We aim at comparing the line asymmetry and velocity of the two δ Sct stars ρ Pup and DX Cet with previous spectroscopic data obtained on classical Cepheids and β Cep stars.
Methods: We obtained, analysed and d…
X-ray spectroscopy of the mixed morphology supernova remnant W 28 with XMM-Newton
Ishida, Manabu; Bamba, Aya; Tatematsu, Ken'ichi +6 more
We report on spatially resolved X-ray spectroscopy of the north-eastern part of the mixed morphology supernova remnant (SNR) W 28 with XMM-Newton. The observed field of view includes a prominent and twisted shell emission forming the edge of this SNR as well as part of the center-filled X-ray emission brightening toward the south-west edge of the …
The Extreme Ultraviolet Deficit and Magnetically Arrested Accretion in Radio-loud Quasars
Punsly, Brian
The Hubble Space Telescope composite quasar spectra presented in Telfer et al. show a significant deficit of emission in the extreme ultraviolet for the radio-loud component of the quasar population (RLQs) compared to the radio-quiet component of the quasar population. The composite quasar continuum emission between 1100 Å and ~580 Å is generally …
Non-minimal braneworld inflation after the Planck
Nozari, Kourosh; Rashidi, Narges
The recently released Planck data have constrained 4-dimensional inflationary parameters even more accurately than ever. We consider an extension of the braneworld model with induced gravity and a non-minimally coupled scalar field on the brane. We constraint the inflation parameters in this setup, by adopting six types of potential, in confrontat…
A dynamical transition from atomic to molecular intermediate-velocity clouds
Boulanger, F.; Lagache, G.; Kerp, J. +2 more
Context. Towards the high galactic latitude sky, the far-infrared (FIR) intensity is tightly correlated to the total hydrogen column density which is made up of atomic (H i) and molecular hydrogen (H2). Above a certain column density threshold, atomic hydrogen turns molecular.
Aims: We analyse gas and dust properties of intermediat…
First Extragalactic Detection of Submillimeter CH Rotational Lines from the Herschel Space Observatory
Wilson, Christine D.; Glenn, Jason; Spinoglio, Luigi +5 more
We present the first extragalactic detections of several CH rotational transitions in the far-infrared in four nearby galaxies, NGC 1068, Arp 220, M82, and NGC 253, using the Herschel Space Observatory. The CH lines in all four galaxies are a factor of 2-4 brighter than the adjacent HCN and HCO+ J = 6-5 lines (also detected in the same …
First detection of [N II] 205 µm absorption in interstellar gas. Herschel-HIFI observations towards W 31C, W 49N, W 51, and G34.3+0.1
Menten, K. M.; Falgarone, E.; Levrier, F. +8 more
We present high resolution [N ii] 205 µm (3P1 - 3P0) spectra obtained with Herschel-HIFI towards a small sample of far-infrared bright star forming regions in the Galactic plane: W 31C (G10.6-0.4), W 49N (G43.2-0.1), W 51 (G49.5-0.4), and G34.3+0.1. All sources display an emission line profile asso…
Super-Eddington Accretion in the Ultraluminous X-Ray Source NGC 1313 X-2: An Ephemeral Feast
Weng, Shan-Shan; Zhao, Hai-Hui; Zhang, Shuang-Nan
We investigate the X-ray spectrum, variability, and the surrounding ionized bubble of NGC 1313 X-2 to explore the physics of super-Eddington accretion. Beyond the Eddington luminosity, the accretion disk of NGC 1313 X-2 is truncated at a large radius (~50 times the innermost stable circular orbit), and displays the similar evolution track with bot…