Search Publications
Missions
Journals
Publication Years
Extremely High Plasma Densities in the Mars Ionosphere Associated With Cusp-Like Magnetic Fields
Fallows, K.; Withers, P.; Kopf, A. +1 more
The Martian crustal magnetic field modifies the structure of the ionosphere, the loss of atmosphere to space, and the interactions of the upper atmosphere with the solar wind. The Mars Advanced Radar for Subsurface and Ionosphere Sounding topside sounder on Mars Express has regularly observed oblique echoes from magnetically controlled plasma stru…
Gemini IFU, VLA, and HST observations of the OH Megamaser Galaxy IRAS17526 + 3253
Storchi-Bergmann, T.; Robinson, A.; Riffel, R. A. +7 more
We present a multiwavelength study of the OH megamaser galaxy IRAS17526 + 3253, based on new Gemini multi-object spectrograph integral field unit (GMOS/IFU) observations, Hubble Space Telescope F814W, and H α + [N II] images, and archival 2MASS and 1.49 GHz VLA data. The Hubble Space Telescope(HST) images clearly reveal a mid-to-advanced stage maj…
Compact Galaxies at intermediate redshifts quench faster than normal-sized Galaxies
Menéndez-Delmestre, K.; Charbonnier, A.; Gonçalves, T. S. +2 more
Massive quiescent compact galaxies have been discovered at high redshifts, associated with rapid compaction and cessation of star formation (SF). In this work, we set out to quantify the time-scales in which SF is quenched in compact galaxies at intermediate redshifts. For this, we select a sample of green valley galaxies within the COSMOS field i…
Mode of accretion in episodic radio galaxies and the dynamics of their outer relic lobes
Hota, Ananda; Hardcastle, M. J.; Croston, J. H. +3 more
We present X-ray observations with the X-ray Multi-Mirror Mission Newton telescope of three double-double radio galaxies (DDRGs). We have detected the core, lobes, and environment of our sample DDRGs in X-rays. We examine the relationships between the radio and X-ray emission and attribute the X-ray emission from the lobes to the inverse Compton s…
The OTELO survey. III. Demography, morphology, IR luminosity and environment of AGN hosts
Gallego, Jesús; Sánchez-Portal, Miguel; Pintos-Castro, Irene +16 more
Aims: We take advantage of the capabilities of the OSIRIS Tunable Emission Line Object (OTELO) survey to select and study the AGN population in the field. In particular, we aim to perform an analysis of the properties of these objects, including their demography, morphology, and IR luminosity. Focusing on the population of Hα emitters at z ∼ …
Interplay between Kelvin-Helmholtz and lower-hybrid drift instabilities
Henri, Pierre; Pucci, Francesco; Lavorenti, Federico +3 more
Boundary layers in space and astrophysical plasmas are the location of complex dynamics where different mechanisms coexist and compete, eventually leading to plasma mixing. In this work, we present fully kinetic particle-in-cell simulations of different boundary layers characterized by the following main ingredients: a velocity shear, a density gr…
A new possible accretion scenario for ultra-luminous X-ray sources
Makishima, K.; Nakazawa, K.; Kobayashi, Shogo B.
Using archival data from Suzaku, XMM-Newton, and NuSTAR, nine representative ultra-luminous X-ray sources (ULXs) in nearby galaxies were studied. Their X-ray spectra were all reproduced with a multicolour disc emission model plus its Comptonization. However, the spectral shapes of individual sources changed systematically depending on the luminosi…
Evidence for bimodal orbital separations of white dwarf-red dwarf binary stars
Gänsicke, B. T.; Marsh, T. R.; Ashley, R. P. +2 more
We present the results of a radial velocity survey of 20 white dwarf plus M dwarf binaries selected as a follow up to a Hubble Space Telescope study that aimed to spatially resolve suspected binaries. Our candidates are taken from the list of targets that were spatially unresolved with Hubble. We have determined the orbital periods for 16 of these…
Flattened loose particles from numerical simulations compared to particles collected by Rosetta
Lasue, J.; Bentley, M. S.; Merouane, S. +5 more
Context. Cometary dust particles are remnants of the primordial accretion of refractory material that occurred during the initial formation stages of the solar system. Understanding their physical structure can help constrain their accretion process.
Aims: The in situ study of dust particles that were collected at slow speeds by instruments o…
Transition Region Loops in the Very Late Phase of Flux Emergence in IRIS Sit-and-stare Observations
Fu, Hui; Li, Bo; Xia, Lidong +3 more
Loops are one of the fundamental structures that trace the geometry of the magnetic field in the solar atmosphere. Their evolution and dynamics provide a crucial proxy for studying how the magnetized structures are formed and heated in the solar atmosphere. Here, we report on spectroscopic observations of a set of transition-region loops taken by …