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Probing the Hot X-Ray Gas in the Narrow-line Region of Mrk 3
Andrade-Santos, Felipe; Kraft, Ralph P.; Forman, William R. +2 more
We study the prototypical Seyfert 2 galaxy, Markarian 3, based on imaging and high-resolution spectroscopy observations taken by Chandra. We construct a deconvolved X-ray image, which reveals the S-shaped morphology of the hot gas in the narrow-line region (NLR). While this morphology is similar to the radio and [O III] emission, the distribution …
Direct Measurement of Anisotropic and Asymmetric Wave Vector Spectrum in Ion-scale Solar Wind Turbulence
Escoubet, C. P.; Narita, Y.; Roberts, O. W.
This analysis represents the first time that a simultaneous measurement of parallel and perpendicular spectral indices at both inertial and kinetic scales has been made directly in wave vector space, using a single interval of solar wind plasma. An interferometric wave vector analysis method is applied to four-point magnetometer data from the Clus…
Vertical magnetic field gradient in the photospheric layers of sunspots
Joshi, Jayant; Lagg, Andreas; Hirzberger, Johann +2 more
Aims: We investigate the vertical gradient of the magnetic field of sunspots in the photospheric layer.
Methods: Independent observations were obtained with the Solar Optical Telescope/Spectropolarimeter (SOT/SP) on board the Hinode spacecraft and with the Tenrife Infrared Polarimeter-2 (TIP-2) mounted at the German Vacuum Tower Telescop…
Searching for Fossil Evidence of AGN Feedback in WISE-selected Stripe-82 Galaxies by Measuring the Thermal Sunyaev-Zel’dovich Effect with the Atacama Cosmology Telescope
Cohen, Seth; Joshi, Bhavin; Scannapieco, Evan +2 more
We directly measure the thermal energy of the gas surrounding galaxies through the thermal Sunyaev-Zel’dovich (tSZ) effect. We perform a stacking analysis of microwave background images from the Atacama Cosmology Telescope, around 1179 massive quiescent elliptical galaxies at 0.5 ≤ z ≤ 1.0 (“low-z”) and 3274 galaxies at 1.0 ≤ z ≤ 1.5 (“high-z”), s…
Plateaus and sinuous ridges as the fingerprints of lava flow inflation in the Eastern Tharsis Plains of Mars
Williams, David A.; Bleacher, Jacob E.; Crumpler, Larry S. +5 more
The Tharsis Montes rift aprons are composed of outpourings of lava from chaotic terrains to the northeast and southwest flank of each volcano. Sinuous and branching channel networks that are present on the rift aprons suggest the possibility of fluvial processes in their development, or erosion by rapidly emplaced lavas, but the style of lava flow…
A Challenging View of the 2015 Summer V404 Cyg Outburst at High Energy with INTEGRAL/SPI: The Finale
Jourdain, Elisabeth; Roques, Jean-Pierre; Rodi, James
During its strong outburst of 2015 June/July, the X-ray transient V404 Cygni (=GS2023+338) was observed up to a level of 50 Crab in the hard X-ray domain. We focus here on a particularly intense episode preceeding a definitive decline of the source activity. We benefit from large signal-to-noise ratios to investigate the source spectral variabilit…
Sulphur isotope mass-independent fractionation observed in comet 67P/Churyumov-Gerasimenko by Rosetta/ROSINA
Altwegg, K.; Balsiger, H.; Fuselier, S. A. +12 more
The knowledge about sulphur isotopic fractionation in volatile cometary species is limited as only measurements in five comets have been done and only for 34S/32S. The lack of information about the fractionation of 33S/32S makes it impossible to compare them with what is known from refractories. We prese…
CONSERT constrains the internal structure of 67P at a few metres size scale
Plettemeier, Dirk; Kofman, Wlodek; Herique, Alain +6 more
The internal properties of cometary nuclei are the best clues to the size distribution and properties of the early planetesimals that formed the planets during the early Solar system nebula processes. The CONSERT radar was designed to probe the interior of comet 67P/Churyumov-Gerasimenko with a wavelength of about 3 m. It was successfully operated…
Global permittivity mapping of the Martian surface from SHARAD
Mège, Daniel; Gurgurewicz, Joanna; Castaldo, Luigi +2 more
SHARAD is a subsurface sounding radar aboard NASA's Mars Reconnaissance Orbiter, capable of detecting dielectric discontinuities in the subsurface caused by compositional and/or structural changes. Echoes coming from the surface contain information on geometric properties at metre scale and on the permittivity of the upper layers of the Martian cr…
A Controlled Study of Cold Dust Content in Galaxies from z = 0-2
Kartaltepe, Jeyhan S.; Kirkpatrick, Allison; Kocevski, Dale D. +12 more
At z=1{--}3, the formation of new stars is dominated by dusty galaxies whose far-IR emission indicates they contain colder dust than local galaxies of a similar luminosity. We explore the reasons for the evolving IR emission of similar galaxies over cosmic time using (1) local galaxies from GOALS ({L}{IR}={10}11{--}{10}1…