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X-ray timing analysis of the quasar PG 1211+143
Vaughan, S.; Reeves, J. N.; Pounds, K. +1 more
We report on a timing analysis of a new ∼630 ks XMM-Newton observation of the quasar, PG 1211+143. We find a well-defined X-ray power spectrum with a well-detected bend at ∼7 × 10-5 Hz, consistent with the established tbend-MBH correlation for luminous, accreting black holes. We find the linear rms-flux relation co…
A radiative transfer model to treat infrared molecular excitation in cometary atmospheres
Bockelée-Morvan, D.; Debout, V.; Zakharov, V.
The exospheres of small Solar System bodies are now observed with high spatial resolution from space missions. Interpreting infrared spectra of cometary gases obtained with the VIRTIS experiment onboard the Rosetta cometary mission requires detailed modeling of infrared fluorescence emission in optically thick conditions. Efficient computing metho…
Constraining quantum collapse inflationary models with CMB data
Benetti, Micol; Alcaniz, Jailson S.; Landau, Susana J.
The hypothesis of the self-induced collapse of the inflaton wave function was proposed as responsible for the emergence of inhomogeneity and anisotropy at all scales. This proposal was studied within an almost de Sitter space-time approximation for the background, which led to a perfect scale-invariant power spectrum, and also for a quasi-de Sitte…
The bi-directional moving structures in a coronal bright point
Li, Dong; Ning, Zongjun; Su, Yingna
We report the bi-directional moving structures in a coronal bright point (CBP) on 2015 July 14. It is observed by the Atmospheric Imaging Assembly (AIA) onboard Solar Dynamics Observatory (SDO). This CBP has a lifetime of ∼10 minutes, and a curved shape. The observations show that many bright structures are moving intermittently outward from the C…
Origin of the broad iron line feature and the soft X-ray variation in Seyfert galaxies
Ebisawa, Ken; Mizumoto, Misaki; Inoue, Hajime +4 more
Many Seyfert galaxies are known to exhibit significant X-ray spectral variations and seemingly broad iron K-emission line features. In this paper, we show that the "variable partial covering model," which has been successfully proposed for MCG -6-30-15 (Miyakawa et al. 2012, PASJ, 64, 140) and 1H 0707-495 (Mizumoto et al. 2014, PASJ, 66, 122), can…
Investigating the relation between CO (3-2) and far-infrared luminosities for nearby merging galaxies using ASTE
Kaneko, Hiroyuki; Muto, Takayuki; Ueda, Junko +10 more
We present the new single-dish CO (3-2) emission data obtained toward 19 early-stage and 7 late-stage nearby merging galaxies using the Atacama Submillimeter Telescope Experiment (ASTE). Combining with the single-dish and interferometric data of galaxies observed in previous studies, we investigate the relation between the CO (3-2) luminosity (L^'…
Prestellar core modeling in the presence of a filament. The dense heart of L1689B
Henning, Th.; Bacmann, A.; Steinacker, J. +1 more
Context. Lacking a paradigm for the onset of star formation, it is important to derive basic physical properties of prestellar cores and filaments like density and temperature structures.
Aims: We aim to disentangle the spatial variation in density and temperature across the prestellar core L1689B, which is embedded in a filament. We want to …
Quantifying substructures in Hubble Frontier Field clusters: comparison with ΛCDM simulations
Liesenborgs, Jori; Mohammed, Irshad; Saha, Prasenjit +2 more
The Hubble Frontier Fields (HFFs) are six clusters of galaxies, all showing indications of recent mergers, which have recently been observed for lensed images. As such they are the natural laboratories to study the merging history of galaxy clusters. In this work, we explore the 2D power spectrum of the mass distribution PM(k) as a meas…
XMM-Newton Slew Survey Observations of the Gravitational Wave Event GW150914
Troja, E.; Salvaterra, R.; Read, A. M. +1 more
The detection of the first gravitational wave (GW) transient GW150914 prompted an extensive campaign of follow-up observations at all wavelengths. Although no dedicated XMM-Newton observations have been performed, the satellite passed through the GW150914 error region during normal operations. Here we report the analysis of the data taken during t…
Observational Test for a Random Sweeping Model in Solar Wind Turbulence
Glassmeier, K. H.; Narita, Y.; Perschke, C. +1 more
Evidence of frequency broadening at ion kinetic scales due to large-scale eddies and waves is found in solar wind turbulence by a test for a random sweeping model using the magnetic energy spectrum in the frequency vs wave number domain in the comoving frame of the flow obtained from multispacecraft observations. The statistical analysis of the fr…