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Catastrophic ice lake collapse in Aram Chaos, Mars
Kleinhans, Maarten G.; Zegers, Tanja E.; Oosthoek, Jelmer H. P. +1 more
Hesperian chaotic terrains have been recognized as the source of outflow channels formed by catastrophic outflows. Four main scenarios have been proposed for the formation of chaotic terrains that involve different amounts of water and single or multiple outflow events. Here, we test these scenarios with morphological and structural analyses of im…
Kinematics of the ionized-to-neutral interfaces in Monoceros R2
Ossenkopf, V.; Cernicharo, J.; Gerin, M. +10 more
Context. Monoceros R2 (Mon R2), at a distance of 830 pc, is the only ultra-compact H ii region (UC H ii) where its associated photon-dominated region (PDR) can be resolved with the Herschel Space Observatory.
Aims: Our aim is to investigate observationally the kinematical patterns in the interface regions (i.e., the transition from atomic to …
Radiative inflation and dark energy RIDEs again after BICEP2
Di Bari, Pasquale; King, Stephen F.; Luhn, Christoph +2 more
Following the ground-breaking measurement of the tensor-to-scalar ratio r=0.20+0.07-0.05 by the BICEP2 collaboration, we perform a statistical analysis of a model that combines Radiative Inflation with Dark Energy (RIDE) based on the M2|Φ|2 ln (|Φ|2/Λ2) potential and compare its pre…
Data-based modeling of the geomagnetosphere with an IMF-dependent magnetopause
Tsyganenko, N. A.
The paper presents first results of the data-based modeling of the geomagnetospheric magnetic field, using the data of Polar, Geotail, Cluster, and Time History of Events and Macroscale Interactions during Substorms satellites, taken during the period 1995-2012 and covering 123 storm events with SYM-H ≥ -200 nT. The most important innovations in t…
Herschel far-IR counterparts of SDSS galaxies: analysis of commonly used star formation rate estimates
Berta, S.; Magnelli, B.; Lutz, D. +13 more
We study a hundred of galaxies from the spectroscopic Sloan Digital Sky Survey (SDSS) with individual detections in the far-infrared Herschel Photodetector Array Camera and Spectrometer bands (100 or 160 µm) and in the GALEX far-ultraviolet band up to z ∼ 0.4 in the COSMOS and Lockman Hole fields. The galaxies are divided into four spectral …
A Multi-wavelength View of the Central Kiloparsec Region in the Luminous Infrared Galaxy NGC 1614
Colina, Luis; Alonso-Herrero, Almudena; Alberdi, Antxon +9 more
The Luminous Infrared Galaxy NGC 1614 hosts a prominent circumnuclear ring of star formation. However, the nature of the dominant emitting mechanism in its central ~100 pc is still under debate. We present sub-arcsecond angular resolution radio, mid-infrared, Paα, optical, and X-ray observations of NGC 1614, aimed at studying in detail both the ci…
Investigating the hard X-ray emission from the hottest Abell cluster A2163 with Suzaku
Pratt, G. W.; Reiprich, T. H.; Ota, N. +3 more
Context. We present the results from Suzaku of the hottest Abell galaxy cluster
Aims: To study the physics of gas heating in cluster mergers, we investigated hard X-ray emission from the merging cluster
Methods: We analyzed ha…
The quiescent state of the accreting X-ray pulsar SAX J2103.5+4545
Zezas, A.; Reig, P.; Doroshenko, V.
We present an X-ray timing and spectral analysis of the Be/X-ray binary SAX J2103.5+4545 at a time when the Be star's circumstellar disc had disappeared and thus the main reservoir of material available for accretion had extinguished. In this very low optical state, pulsed X-ray emission was detected at a level of LX ∼ 1033 e…
Constraining black hole masses in low-accreting active galactic nuclei using X-ray spectra
Titarchuk, L.; Gliozzi, M.; Jang, I. +1 more
In a recent work we demonstrated that a novel X-ray scaling method, originally introduced for Galactic black holes (BHs), can be reliably extended to estimate the mass of supermassive BHs accreting at a moderate to high level. Here we investigate the limits of applicability of this method to low-accreting active galactic nuclei (AGN), using a cont…
Control of periodic variations in Saturn's magnetosphere by compressional waves
Kivelson, Margaret Galland; Jia, Xianzhe
Many of the periodic variations observed in Saturn's magnetosphere can be linked directly to the presence of a rotating pattern of field-aligned currents that link the northern and southern ionospheres with each other and with the magnetosphere. Such a current system is incorporated in a magnetohydrodynamic simulation that has previously been show…