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Observational dynamics of low-mass stellar systems
Frank, M. J.
The last fifteen years have seen the discovery of new types of low-mass stellar systems that bridge the gap between the once well-separated regimes of galaxies and of star clusters. Whether such objects are considered galaxies depends also on the definition of the term ``galaxy'', and several possible criteria are based on their internal dynamics …
Collisionless resistivity in a bifurcated current sheet
Andriyas, T.; Spencer, E.
The collisionless resistivity due to charged particle chaos in spatially inhomogeneous magnetic fields is calculated for two frequently observed magnetotail current sheets, the X line, and a bifurcated current sheet (BCS) over varying strengths of cross-tail electric field. The calculation is done for two charged species, protons and O+…
Morphology and Structure of Ultraluminous Infrared Galaxies at z ≈ 2 in the EGS Field
Chen, Y.; Kong, X.; Fang, G. W. +1 more
Using high-resolution HST WFC3 (Hubble Space Telescope Wide Field Camera 3) F160W imaging from the CANDELS-EGS (Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey-Extended Groth Strip) field, we present the morphology analysis of 9 ultraluminous infrared galaxies (ULIRGs) at z≈2. We find a wide range of morphological diversities for th…
Molecular gas associated with IRAS 10361-5830
Rubio, M.; Cappa, C. E.; Vazzano, M. M. +2 more
Aims: We analyze the distribution of the molecular gas and dust in the molecular clump linked to
Herschel/PACS photometry of transiting-planet host stars with candidate warm debris disks
Ardila, David R.; Bouy, Hervé; Stapelfeldt, Karl +4 more
Dust in debris disks is produced by colliding or evaporating planetesimals, which are remnants of the planet formation process. Warm dust disks, known by their emission at ≤24 µm, are rare (4% of FGK main sequence stars) and especially interesting because they trace material in the region likely to host terrestrial planets, where the dust ha…
Stereoscopic observations of the effects of a halo CME on the solar coronal structure
Romano, P.; Spadaro, D.; Dolei, S. +1 more
We investigated the substantial restructuring of the outer solar corona in the aftermath of the halo CME that occurred on 9 March 2012. To perform our analysis, we used SOHO/LASCO, STEREO/COR1 and SDO/AIA data, which provide observations from different viewpoints. In particular, we applied the polarization ratio technique to the COR1 calibrated im…
A Herschel PACS survey of brown dwarfs in IC 2391: limits on primordial and debris disc fractions
Riaz, B.; Kennedy, G. M.
We present results from a Herschel Photodetector Array Camera and Spectrometer (PACS) survey of eight brown dwarfs in the IC 2391 cluster. Our aim was to determine the brown dwarf disc fraction at ages of ∼40-50 Myr. None of the eight brown dwarfs observed were detected in the PACS 70 or 160 µm bands. We have determined the detection limits …
Herschel Photometry of Disks around Low-mass Stars in the R CrA Cloud
Henning, Thomas; Liu, Yao; Wolf, Sebastian +1 more
We report photometric results from a subset of a Herschel-PACS program to observe cool dust in disks around low-mass stars as a complement to our earlier program to measure far-infrared emission from brown dwarfs. In this latest study we observed five low-mass objects in the nearby R Corona Australis region and detected at least three at 70 µ…
A new inflation potential with NMC to gravity in light of Planck and BICEP2 data
Bennai, M.; Naciri, M.; Mounzi, Z. +2 more
Radio emission from dusty galaxies observed by AKARI
Takeuchi, T. T.; Pollo, A.; Solarz, A. +2 more
We probe radio-infrared correlation for two samples of extragalactic sources from the local Universe from the AKARI All-Sky Catalogue. The first, smaller sample (1053 objects) was constructed by the cross-correlation of the AKARI/FIS All-Sky Survey Bright Source Catalogue, the AKARI IRC All-Sky Survey Point Source Catalogue and the NRAO VLA Sky Su…