Search Publications
The neutron star in HESS J1731-347: Central compact objects as laboratories to study the equation of state of superdense matter
Werner, K.; Klochkov, D.; Santangelo, A. +3 more
Context. Central compact objects (CCOs) in supernova remnants are isolated thermally emitting neutron stars (NSs). They are most probably characterized by a magnetic field strength that is roughly two orders of magnitude lower than that of most of the radio and accreting pulsars. The thermal emission of CCOs can be modeled to obtain constraints on…
Dynamical features and spatial structures of the plasma interaction region of 67P/Churyumov-Gerasimenko and the solar wind
Glassmeier, K. -H.; Richter, I.; Koenders, C. +2 more
In the advent of the Rosetta arrival at the comet 67P/Churyumov-Gerasimenko, we present a global 3D hybrid simulation model of the cometary plasma interaction which resolves the innermost coma sufficiently. As Rosetta will only provide local information, global simulations are required to put these local observations into a wider global perspectiv…
Storm in a "Teacup": A Radio-quiet Quasar with ≈10 kpc Radio-emitting Bubbles and Extreme Gas Kinematics
Thomson, A. P.; Alexander, D. M.; Bauer, F. E. +5 more
We present multi-frequency (1-8 GHz) Very Large Array data, combined with VIsible MultiObject Spectrograph integral field unit data and Hubble Space Telescope imaging, of a z = 0.085 radio-quiet type 2 quasar (with L 1.4 GHz ≈ 5 × 1023 W Hz-1 and L AGN ≈ 2 × 1045 erg s-1). Due to th…
An Extreme Metallicity, Large-scale Outflow from a Star-forming Galaxy at z ~ 0.4
Charlton, Jane C.; Kacprzak, Glenn G.; Churchill, Christopher W. +4 more
We present a detailed analysis of a large-scale galactic outflow in the circumgalactic medium of a massive ({M}{{h}}∼ {10}12.5 {M}⊙ ), star-forming (∼ 6.9 {M}⊙ yr-1), sub-L* (∼ 0.5{L}B*) galaxy at z = 0.39853 that exhibits a wealth of metal-line absorption in …
Suzaku observations of Mrk 335: confronting partial covering and relativistic reflection
Fabian, A. C.; Komossa, S.; Gallo, L. C. +7 more
We report on the deepest X-ray observation of the narrow-line Seyfert 1 galaxy Mrk 335 in the low-flux state obtained with Suzaku. The data are compared to a 2006 high-flux Suzaku observation when the source was ∼10 times brighter. Describing the two flux levels self-consistently with partial covering models would require extreme circumstances, as…
First observations of H2O and CO2 vapor in comet 67P/Churyumov-Gerasimenko made by VIRTIS onboard Rosetta
Kührt, E.; Encrenaz, T.; Erard, S. +29 more
Context. Outgassing from cometary nuclei involves complex surface and subsurface processes that need to be understood to investigate the composition of cometary ices from coma observations.
Aims: We investigate the production of water, carbon dioxide, and carbon monoxide from the nucleus of comet 67P/Churyumov-Gerasimenko (67P). These species…
A strong seasonal dependence in the Martian hydrogen exosphere
Bertaux, Jean-Loup; Chaufray, Jean-Yves; Clarke, John T. +2 more
Hubble Space Telescope and Mars Express observed unexpected rapid changes in the Martian hydrogen exosphere involving a decrease in scattered Lyman α intensity in fall 2007 (solar longitude, Ls = 331°-345°). These changes detected were speculated to be a combination of seasonal variation and/or dust storms and lower atmospheric dynamics…
Double layer electric fields aiding the production of energetic flat-top distributions and superthermal electrons within magnetic reconnection exhausts
Borg, A. L.; Egedal, J.; Daughton, W. +1 more
Using a kinetic simulation of magnetic reconnection, it was recently shown that magnetic-field-aligned electric fields (E∥) can be present over large spatial scales in reconnection exhausts. The largest values of E∥ are observed within double layers. The existence of double layers in the Earth's magnetosphere is well document…
[C II] absorption and emission in the diffuse interstellar medium across the Galactic plane
Menten, K. M.; Falgarone, E.; Godard, B. +10 more
Aims: Ionized carbon is the main gas-phase reservoir of carbon in the neutral diffuse interstellar medium (ISM) and its 158 µm fine structure transition [C ii] is the most important cooling line of the diffuse ISM. We combine [C ii] absorption and emission spectroscopy to gain an improved understanding of physical conditions in the diff…
Cross-correlation between the CMB Lensing Potential Measured by Planck and High-z Submillimeter Galaxies Detected by the Herschel-Atlas Survey
Baccigalupi, C.; Bielewicz, P.; Danese, L. +15 more
We present the first measurement of the correlation between the map of the cosmic microwave background (CMB) lensing potential derived from the Planck nominal mission data and z≳ 1.5 galaxies detected by the Herschel-ATLAS (H-ATLAS) survey covering about 600 {{deg }2}, i.e., about 1.4% of the sky. We reject the hypothesis that there is …