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Unveiling the nucleus of NGC 7172
Eckart, A.; Zuther, J.; Smajić, S. +1 more
Aims: We present the results of near-infrared (NIR) H + K European Southern Observatory SINFONI integral field spectroscopy (IFS) of the Seyfert 2 galaxy
(21) Lutetia spectrophotometry from Rosetta-OSIRIS images and comparison to ground-based observations
Jorda, L.; Lara, L. M.; Bertaux, J. -L. +40 more
Here we present some preliminary results on surface variegation found on (21) Lutetia from ROSETTA-OSIRIS images acquired on 2010-07-10. The spectrophotometry obtained by means of the two cameras NAC and WAC (Narrow and Wide Angle Cameras) is consistent with ground based observations, and does not show surface diversity above the data error bars. …
The Limit of Magnetic-shear Energy in Solar Active Regions
Moore, Ronald L.; Sterling, Alphonse C.; Falconer, David A.
It has been found previously, by measuring from active-region magnetograms a proxy of the free energy in the active region's magnetic field, (1) that there is a sharp upper limit to the free energy the field can hold that increases with the amount of magnetic field in the active region, the active region's magnetic flux content, and (2) that most …
Physical properties of craters on asteroid (21) Lutetia
Jorda, L.; Lara, L. M.; Bertaux, J. -L. +37 more
This paper presents an analysis of the physical properties of craters on asteroid (21) Lutetia, derived from images acquired by OSIRIS, the high-resolution cameras onboard ESA's spacecraft Rosetta. Crater morphology on (21) Lutetia fits very well with the general picture of what was known for previously visited small bodies, with a typical depth t…
The Remarkable High Pressure of the Local Leo Cold Cloud
Peek, J. E. G.; Heiles, Carl; Meyer, David M. +1 more
Using the Space Telescope Imaging Spectrograph (STIS) on board the Hubble Space Telescope, we have obtained high-resolution ultraviolet spectra of the C I absorption toward two stars behind the Local Leo Cold Cloud (LLCC). At a distance (≈20 pc) that places it well inside the Local Bubble, the LLCC is the nearest example of the coldest known (T ≈ …
Studying the kinematic asymmetries of disks and post-coalescence mergers using a new "kinemetry" criterion
Colina, L.; Arribas, S.; Bellocchi, E.
Context. Ultra luminous and luminous infrared galaxies [(U)LIRGs] are important galaxy populations for studying galaxy evolution, and are likely to have been responsible for a significant fraction of the star formation that occurred prior to z ~ 1. Local (U)LIRGs can be used to study criteria that are suitable for characterizing similar high redsh…
Chemistry of C3 and carbon chain molecules in DR21(OH)
Menten, K. M.; Krełowski, J.; Csengeri, T. +14 more
Context. C3 is the smallest pure carbon chain detected in the dense environment of star-forming regions, although diatomic C2 is detected in diffuse clouds. Measurement of the abundance of C3 and the chemistry of its formation in dense star-forming regions has remained relatively unexplored.
Aims: We aim to id…
Dissipation of Titan's north polar cloud at northern spring equinox
Nicholson, Philip D.; Sotin, Christophe; Barnes, Jason W. +10 more
Saturn's Moon Titan has a thick atmosphere with a meteorological cycle. We report on the evolution of the giant cloud system covering its north pole using observations acquired by the Visual and Infrared Mapping Spectrometer onboard the Cassini spacecraft. A radiative transfer model in spherical geometry shows that the clouds are found at an altit…
Deep X-Ray Observations of the Young High-magnetic-field Radio Pulsar J1119-6127 and Supernova Remnant G292.2-0.5
Ng, C. -Y.; Shannon, R.; Weltevrede, P. +4 more
High-magnetic-field radio pulsars are important transition objects for understanding the connection between magnetars and conventional radio pulsars. We present a detailed study of the young radio pulsar J1119-6127, which has a characteristic age of 1900 yr and a spin-down-inferred magnetic field of 4.1 × 1013 G, and its associated supe…
A multiwavelength study of evolved massive stars in the Galactic Centre
Morris, M. R.; Wang, Q. D.; Dong, H.
The central region of the Milky Way Galaxy provides a unique laboratory for a systematic, spatially resolved population study of evolved massive stars of various types in a relatively high-metallicity environment. We have conducted a multiwavelength data analysis of 180 such stars or candidates, most of which were drawn from a recent large-scale H…