Search Publications
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…
CARMA Large Area Star Formation Survey: Dense Gas in the Young L1451 Region of Perseus
Kwon, Woojin; Meisner, Aaron M.; Kauffmann, Jens +18 more
We present a 3 mm spectral line and continuum survey of L1451 in the Perseus Molecular Cloud. These observations are from the CARMA Large Area Star Formation Survey (CLASSy), which also imaged Barnard 1, NGC 1333, Serpens Main, and Serpens South. L1451 is the survey region with the lowest level of star formation activity—it contains no confirmed p…
Absorption at 11 µm in the interstellar medium and embedded sources: evidence for crystalline silicates
Wright, Christopher M.; Do Duy, Tho; Lawson, Warrick
An absorption feature is occasionally reported around 11 µm in astronomical spectra, including those of forming stars. Candidate carriers include water ice, polycyclic aromatic hydrocarbons, silicon carbide, crystalline silicates or even carbonates. All are known constituents of cosmic dust in one or more types of environments, though not ne…
Bayesian analysis of two stellar populations in Galactic globular clusters- III. Analysis of 30 clusters
Jefferys, W. H.; Stenning, D. C.; Wagner-Kaiser, R. +5 more
We use Cycle 21 Hubble Space Telescope (HST) observations and HST archival ACS Treasury observations of 30 Galactic globular clusters to characterize two distinct stellar populations. A sophisticated Bayesian technique is employed to simultaneously sample the joint posterior distribution of age, distance, and extinction for each cluster, as well a…
Nereid from space: rotation, size and shape analysis from K2, Herschel and Spitzer observations
Pál, A.; Molnár, L.; Müller, T. G. +8 more
In this paper, we present an analysis of K2 mission Campaign 3 observations of the irregular Neptune satellite, Nereid. We determined a rotation period of P = 11.594±0.017 h and amplitude of Δm = 0.0328m ± 0.0018m, confirming previous short rotation periods obtained in ground-based observations. The similarities of light-curve amplitudes between 2…