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A Uniform Contribution of Core-collapse and Type Ia Supernovae to the Chemical Enrichment Pattern in the Outskirts of the Virgo Cluster
Simionescu, A.; Allen, S. W.; Werner, N. +3 more
We present the first measurements of the abundances of α-elements (Mg, Si, and S) extending out beyond the virial radius of a cluster of galaxies. Our results, based on Suzaku Key Project observations of the Virgo Cluster, show that the chemical composition of the intracluster medium is consistent with being constant on large scales, with a flat d…
Free-form lensing implications for the collision of dark matter and gas in the frontier fields cluster MACS J0416.1-2403
Broadhurst, Tom; Lam, Daniel; Lim, Jeremy +2 more
We present a free-form mass reconstruction of the massive lensing cluster MACS J0416.1-2403 using the latest Hubble Frontier Fields data. Our free-form method finds that the extended lensing pattern is generated by two elongated, closely projected clusters of similar mass. Our lens model identifies new lensed images with which we improve the accur…
The Earth: Plasma Sources, Losses, and Transport Processes
Liemohn, Michael W.; Fazakerley, Andrew; Wang, Chih-Ping +12 more
This paper reviews the state of knowledge concerning the source of magnetospheric plasma at Earth. Source of plasma, its acceleration and transport throughout the system, its consequences on system dynamics, and its loss are all discussed. Both observational and modeling advances since the last time this subject was covered in detail (Hultqvist et…
The Progenitor of the Type IIb SN 2008ax Revisited
Nomoto, Ken'ichi; Folatelli, Gastón; Kuncarayakti, Hanindyo +3 more
Hubble Space Telescope observations of the site of the supernova (SN) SN 2008ax obtained in 2011 and 2013 reveal that the possible progenitor object detected in pre-explosion images was in fact multiple. Four point sources are resolved in the new, higher-resolution images. We identify one of the sources with the fading SN. The other three objects …
Imaging and Spectral Observations of Quasi-periodic Pulsations in a Solar Flare
Li, D.; Zhang, Q. M.; Ning, Z. J.
We explore the quasi-periodic pulsations (QPPs) in a solar flare observed by Fermi Gamma-ray Burst Monitor, Solar Dynamics Observatory, Solar Terrestrial Relations Observatory, and Interface Region Imaging Spectrograph (IRIS) on 2014 September 10. QPPs are identified as the regular and periodic peaks on the rapidly varying components, which are th…
Mars Advanced Radar for Subsurface and Ionospheric Sounding (MARSIS) after nine years of operation: A summary
Gurnett, D. A.; Morgan, D. D.; Orosei, R. +13 more
Mars Express, the first European interplanetary mission, carries the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) to search for ice and water in the Martian subsurface. Developed by an Italian-US team, MARSIS transmits low-frequency, wide-band radio pulses penetrating below the surface and reflected by dielectric discontinui…
SINFONI spectra of heavily obscured AGNs in COSMOS: Evidence of outflows in a MIR/O target at z ~ 2.5
Berta, S.; Lutz, D.; Le Floc'h, E. +9 more
Aims: We present new data for four candidate obscured Compton-Thick (CT) quasars at z ~ 1-2.5 observed with the SINFONI VLT spectrograph in adaptive optics (AO) mode. These sources were selected from a 24 µm Spitzer MIPS survey of the COSMOS field, on the basis of red mid-infrared to optical and optical to near-infrared colours, with th…
Constraints on secret neutrino interactions after Planck
Lattanzi, Massimiliano; Natoli, Paolo; Forastieri, Francesco
Neutrino interactions beyond the standard model of particle physics may affect the cosmological evolution and can be constrained through observations. We consider the possibility that neutrinos possess secret scalar or pseudoscalar interactions mediated by the Nambu-Goldstone boson of a still unknown spontaneously broken global U(1) symmetry, as i…
Seasonal variation of Martian pick-up ions: Evidence of breathing exosphere
Fedorov, A.; Barabash, S.; Lundin, R. +8 more
The Mars Express (MEX) Ion Mass Analyser (IMA) found that the detection rate of the ring-like distribution of protons in the solar wind outside of the bow shock to be quite different between Mars orbital summer (around perihelion) and orbital winter (around aphelion) for four Martian years, while the north-south asymmetry is much smaller than the …
Temporal morphological changes in the Imhotep region of comet 67P/Churyumov-Gerasimenko
Jorda, L.; Lara, L. M.; Bertaux, J. -L. +45 more
Aims: We report on the first major temporal morphological changes observed on the surface of the nucleus of comet 67P/Churyumov-Gerasimenko in the smooth terrains of the Imhotep region.
Methods: We used images of the OSIRIS cameras onboard Rosetta to follow the temporal changes from 24 May 2015 to 11 July 2015.
Results: The morpholo…