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Homologous Helical Jets: Observations By IRIS, SDO, and Hinode and Magnetic Modeling With Data-Driven Simulations
Golub, L.; Tian, H.; Cheung, Mark C. M. +18 more
We report on observations of recurrent jets by instruments on board the Interface Region Imaging Spectrograph, Solar Dynamics Observatory (SDO), and Hinode spacecraft. Over a 4 hr period on 2013 July 21, recurrent coronal jets were observed to emanate from NOAA Active Region 11793. Far-ultraviolet spectra probing plasma at transition region temper…
Thin Current Sheets and Associated Electron Heating in Turbulent Space Plasma
Vaivads, A.; Sahraoui, F.; Khotyaintsev, Yu. V. +6 more
Intermittent structures, such as thin current sheets, are abundant in turbulent plasmas. Numerical simulations indicate that such current sheets are important sites of energy dissipation and particle heating occurring at kinetic scales. However, direct evidence of dissipation and associated heating within current sheets is scarce. Here, we show a …
Size-frequency distribution of boulders ≥7 m on comet 67P/Churyumov-Gerasimenko
Bertaux, Jean-Loup; Da Deppo, Vania; Naletto, Giampiero +55 more
Aims: We derive for the first time the size-frequency distribution of boulders on a comet, 67P/Churyumov-Gerasimenko (67P), computed from the images taken by the Rosetta/OSIRIS imaging system. We highlight the possible physical processes that lead to these boulder size distributions.
Methods: We used images acquired by the OSIRIS Narrow …
Deconstructing the galaxy stellar mass function with UKIDSS and CANDELS: the impact of colour, structure and environment
Fontana, Adriano; Grogin, Norman A.; Kocevski, Dale D. +15 more
We combine photometry from the Ultra Deep Survey (UDS), Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) UDS and CANDELS the Great Observatories Origins Deep Survey-South (GOODS-S) surveys to construct the galaxy stellar mass function probing both the low- and high-mass end accurately in the redshift range 0.3 < z < 3…
The truncated and evolving inner accretion disc of the black hole GX 339-4
Ponti, G.; Fender, R. P.; Muñoz-Darias, T. +2 more
The nature of accretion onto stellar mass black holes in the low/hard state remains unresolved, with some evidence suggesting that the inner accretion disc is truncated and replaced by a hot flow. However, the detection of relativistic broadened Fe emission lines, even at relatively low luminosities, seems to require an accretion disc extending fu…
The Star Formation Histories of Local Group Dwarf Galaxies. III. Characterizing Quenching in Low-mass Galaxies
Dolphin, Andrew E.; Skillman, Evan D.; Williams, Benjamin F. +4 more
We explore the quenching of low-mass galaxies (104 ≲ {{M}\star } ≲ 108 {{M}⊙ }) as a function of lookback time using the star formation histories (SFHs) of 38 Local Group dwarf galaxies. The SFHs were derived by analyzing color-magnitude diagrams of resolved stellar populations in archival Hubble Space T…
Velocity-resolved [CII] Emission and [CII]/FIR Mapping along Orion with Herschel
Falgarone, E.; Teyssier, D.; Ossenkopf, V. +22 more
We present the first ∼7.‧5 × 11.‧5 velocity-resolved (∼0.2 km s-1) map of the [C ii] 158 µm line toward the Orion molecular cloud 1 (OMC 1) taken with the Herschel/HIFI instrument. In combination with far-IR (FIR) photometric images and velocity-resolved maps of the H41α hydrogen recombination and CO J = 2-1 lines, this data set p…
Hops 383: an Outbursting Class 0 Protostar in Orion
Fischer, William J.; Wilson, T. L.; Watson, Dan M. +11 more
We report the dramatic mid-infrared brightening between 2004 and 2006 of Herschel Orion Protostar Survey (HOPS) 383, a deeply embedded protostar adjacent to NGC 1977 in Orion. By 2008, the source became a factor of 35 brighter at 24 µm with a brightness increase also apparent at 4.5 µm. The outburst is also detected in the submillimete…
Extreme emission-line galaxies out to z ~ 1 in zCOSMOS. I. Sample and characterization of global properties
Kneib, J. -P.; Silverman, J. D.; Bolzonella, M. +37 more
Context. The study of large and representative samples of low-metallicity star-forming galaxies at different cosmic epochs is of great interest to the detailed understanding of the assembly history and evolution of low-mass galaxies.
Aims: We present a thorough characterization of a large sample of 183 extreme emission-line galaxies (EELGs) a…
Far-infrared Dust Temperatures and Column Densities of the MALT90 Molecular Clump Sample
Hoq, Sadia; Jackson, James M.; Sanhueza, Patricio +4 more
We present dust column densities and dust temperatures for ∼3000 young, high-mass molecular clumps from the Millimeter Astronomy Legacy Team 90 GHz survey, derived from adjusting single-temperature dust emission models to the far-infrared intensity maps measured between 160 and 870 µm from the Herschel/Herschel Infrared Galactic Plane Survey…