Search Publications
Molecular Gas in NUclei of GAlaxies (NUGA). XIV. The barred LINER/Seyfert 2 galaxy NGC 3627
Hunt, L. K.; Combes, F.; García-Burillo, S. +2 more
We present 12CO(1-0) and 12CO(2-1) maps of the interacting barred LINER/Seyfert 2 galaxy NGC 3627 obtained with the IRAM interferometer at resolutions of 2.1 arcsec × 1.3 arcsec and 0.9 arcsec × 0.6 arcsec, respectively. We also present single-dish IRAM 30 m 12CO(1-0) and 12CO(2-1) observations used to c…
Statistical Study on the Nature of Solar-Flux Emergence
Shibata, Kazunari; Ichimoto, Kiyoshi; Kitai, Reizaburo +1 more
We studied 101 flux emergence events ranging from small ephemeral regions to large emerging flux regions that were observed with the Hinode Solar Optical Telescope filtergram. We investigated how the total magnetic flux of the emergence event controls the nature of emergence. To determine the modes of emergences, horizontal velocity fields of the …
Waves in Cassini UVIS stellar occultations. 2. The C ring
Lissauer, Jack J.; Colwell, Joshua E.; Esposito, Larry W. +2 more
We performed a complete wavelet analysis of Saturn's C ring on 62 stellar occultation profiles. These profiles were obtained by Cassini's Ultraviolet Imaging Spectrograph High Speed Photometer. We used a WWZ wavelet power transform to analyze them. With a co-adding process, we found evidence of 40 wavelike structures, 18 of which are reported here…
Mapping Magnetospheric Equatorial Regions at Saturn from Cassini Prime Mission Observations
Schippers, P.; André, N.; Krupp, N. +19 more
Saturn's rich magnetospheric environment is unique in the solar system, with a large number of active magnetospheric processes and phenomena. Observations of this environment from the Cassini spacecraft has enabled the study of a magnetospheric system which strongly interacts with other components of the saturnian system: the planet, its rings, nu…
Modeling radar scattering from icy lunar regoliths at 13 cm and 4 cm wavelengths
Heggy, Essam; Thompson, Thomas W.; Ustinov, Eugene A.
Two orbital synthetic aperture radars (SARs), the Chandrayaan-1 Mini-SAR (13 cm wavelength) and the Lunar Reconnaissance Orbiter (LRO) Mini-RF (13 and 4.2 cm wavelengths), have been imaging the lunar surface searching for ice deposits in the polar permanently shadowed areas. To understand the radar signatures of lunar polar ices, an empirical two-…
Probing galaxy dark matter haloes in COSMOS with weak lensing flexion
Schrabback, Tim; Kuijken, Konrad; Velander, Malin
Current theories of structure formation predict specific density profiles of galaxy dark matter haloes, and with weak gravitational lensing we can probe these profiles on several scales. On small scales, higher order shape distortions known as flexion add significant detail to the weak lensing measurements. We present here the first detection of a…
State studies of Earth's plasmasphere: A review
Singh, A. K.; Singh, R. P.; Siingh, Devendraa
The plasmasphere sandwiched between the ionosphere and the outer magnetosphere is populated by up flow of ionospheric cold (∼1 eV) and dense plasma along geomagnetic field lines. Recent observations from various instruments onboard IMAGE and CLUSTER spacecrafts have made significant advances in our understanding of plasma density irregularities, p…
The connection between radio loudness and central surface brightness profiles in optically selected low-luminosity active galaxies
Uttley, P.; Körding, E.; Richings, A. J.
Recent results indicate a correlation between nuclear radio loudness of active galaxies and their central stellar surface-brightness profiles, in that 'core' galaxies (with inner logarithmic slope γ≤ 0.3) are significantly more radio loud than 'power-law' galaxies (γ≥ 0.5). This connection, which indicates possible links between radio loudness and…
The quiet Sun average Doppler shift of coronal lines up to 2 MK
Solanki, S. K.; Teriaca, L.; Dadashi, N.
Context. The average Doppler shift shown by spectral lines formed from the chromosphere to the corona reveals important information on the mass and energy balance of the solar atmosphere, providing an important observational constraint to any models of the solar corona. Previous spectroscopic observations of vacuum ultra-violet (VUV) lines have re…
On the co-evolution of supermassive black holes and their host galaxies since z= 3
Conselice, Christopher J.; Nandra, Kirpal; Bluck, Asa F. L. +3 more
To investigate the evolution in the relation between galaxy stellar and central black hole mass, we identify a population of 508 X-ray-selected active galactic nuclei (AGN) at 0.4 < z < 6 residing within host galaxies with stellar masses in the range 1010 M⊙ < M* < 1012 M⊙. From th…