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Chemically Distinct Nuclei and Outflowing Shocked Molecular Gas in Arp 220
Sturm, E.; Greve, T. R.; Planesas, P. +9 more
We present the results of interferometric spectral line observations of Arp 220 at 3.5 mm and 1.2 mm from the Plateau de Bure Interferometer, imaging the two nuclear disks in H13CN(1-0) and (3-2), H13CO+(1-0) and (3-2), and HN13C(3-2) as well as SiO(2-1) and (6-5), HC15N(3-2), and SO(66
Calibration of the Swift-UVOT ultraviolet and visible grisms
Carter, M.; Mehdipour, M.; Brown, P. J. +16 more
We present the calibration of the Swift Ultraviolet and Optical Telescope (UVOT ) grisms, of which there are two, providing low-resolution field spectroscopy in the ultraviolet and optical bands, respectively. The UV grism covers the range λ1700-5000 Å with a spectral resolution (λ/Δλ) of 75 at λ2600 Å for source magnitudes of u=10-16 mag, while t…
Rosetta Lander - Philae: Landing preparations
Sierks, Holger; Jurado, Eric; Ulamec, Stephan +11 more
Rosetta and Philae have been in hibernation until January 20, 2014. After the successful wakeup they underwent a post-hibernation commissioning. The orbiter instruments (like e.g. the OSIRIS cameras, VIRTIS, MIRO, Alice and ROSINA) characterized the target comet and its environment to allow landing site selection and the definition of a separation…
Thermal structure of Venus nightside upper atmosphere measured by stellar occultations with SPICAV/Venus Express
Vandaele, A. C.; Montmessin, F.; Fedorova, A. +7 more
The thermal structure of Venus upper atmosphere (90-140 km) was investigated using stellar occultation measurements acquired by the SPICAV experiment on board Venus Express. The SPICAV ultraviolet channel provides CO2 local density and temperature vertical profiles with a vertical resolution of < 7 km of both the southern and the nor…
The Formation of IRIS Diagnostics. VII. The Formation of the OI 135.56 NM Line in the Solar Atmosphere
Carlsson, Mats; Lin, Hsiao-Hsuan
The O i 135.56 nm line is covered by NASA's Interface Region Imaging Spectrograph (IRIS) small explorer mission which studies how the solar atmosphere is energized. We study here the formation and diagnostic potential of this line by means of non-local thermodynamic equilibrium modeling employing both 1D semi-empirical and 3D radiation magnetohydr…
Constraints on the reheating temperature from sizable tensor modes
Domcke, Valerie; Heisig, Jan
Despite its importance for modeling the homogeneous hot early Universe very little is experimentally known about the magnitude of the reheating temperature, leaving an uncertainty of remarkable 18 orders of magnitude. In this paper we consider a general class of polynomial inflaton potentials up to fourth order. Employing a Monte Carlo scan and im…
MUSE observations of the lensing cluster SMACSJ2031.8-4036: new constraints on the mass distribution in the cluster core.
Richard, J.; Pello, R.; Bacon, R. +10 more
We present new observations of the lensing cluster SMACSJ2031.8-4036 obtained with the Multi Unit Spectroscopic Explorer (MUSE) integral field spectrograph as part of its commissioning on the Very Large Telescope. By providing medium-resolution spectroscopy over the full 4750-9350 Å domain and a 1 × 1 arcmin2 field of view, MUSE is idea…
Spatially Resolved Imaging and Spectroscopy of Candidate Dual Active Galactic Nuclei
Shields, G. A.; Medling, A. M.; Comerford, J. M. +2 more
When galaxies merge, both central supermassive black holes are immersed in a dense and chaotic environment. If there is sufficient gas in the nuclear regions, one expects to see close pairs of active galactic nuclei (AGNs), or dual AGNs, in a fraction of galaxy mergers. However, finding them remains a challenge. The presence of double-peaked [O ii…
Radio-quiet and Radio-loud Pulsars: Similar in Gamma-Rays but Different in X-Rays
Marelli, M.; Saz Parkinson, P. M.; Wolff, M. T. +4 more
We present new Chandra and XMM-Newton observations of a sample of eight radio-quiet (RQ) γ-ray pulsars detected by the Fermi Large Area Telescope. For all eight pulsars we identify the X-ray counterpart, based on the X-ray source localization and the best position obtained from γ-ray pulsar timing. For PSR J2030+4415 we found evidence for a ∼10″-l…
The nonmagnetic nucleus of comet 67P/Churyumov-Gerasimenko
Haerendel, Gerhard; Motschmann, Uwe; Russell, Christopher T. +17 more
Knowledge of the magnetization of planetary bodies constrains their origin and evolution, as well as the conditions in the solar nebular at that time. On the basis of magnetic field measurements during the descent and subsequent multiple touchdown of the Rosetta lander Philae on the comet 67P/Churyumov-Gerasimenko (67P), we show that no global mag…