Search Publications
Missions
Journals
Publication Years
Characterization of the Abydos region through OSIRIS high-resolution images in support of CIVA measurements
Bibring, J. -P.; Poulet, F.; Jorda, L. +45 more
Context. On 12 November 2014, the European mission Rosetta delivered the Philae lander on the nucleus of comet 67P/Churyumov-Gerasimenko (67P). After the first touchdown, the lander bounced three times before finally landing at a site named Abydos.
Aims: We provide a morphologically detailed analysis of the Abydos landing site to support Phil…
Low-frequency waves at comet 67P/Churyumov-Gerasimenko. Observations compared to numerical simulations
Goetz, C.; Richter, I.; Glassmeier, K. H. +3 more
Context. A new type of low-frequency wave was detected by the magnetometer of the Rosetta Plasma Consortium at the comet during the initial months after the arrival of the Rosetta spacecraft at comet 67P/Churyumov-Gerasimenko. This large-amplitude, nearly continuous wave activity is observed in the frequency range from 30 mHz to 80 mHz where 40 mH…
Cosmic microwave background acoustic peak locations
Knox, L.; Narimani, A.; Pan, Z. +1 more
The Planck collaboration has measured the temperature and polarization of the cosmic microwave background well enough to determine the locations of eight peaks in the temperature (TT) power spectrum, five peaks in the polarization (EE) power spectrum and 12 extrema in the cross (TE) power spectrum. The relative locations of these extrema give a st…
GG Tau: the ringworld and beyond. Mass accretion and planetary formation in young multiple stellar systems
Dutrey, Anne; Di Folco, Emmanuel; Beck, Tracy +1 more
In binary stellar systems, exoplanet searches have revealed planetary mass companions orbiting both in circumstellar and in circumbinary orbits. Modelling studies suggest increased dynamical complexity around the young stars that form such systems. Circumstellar and circumbinary disks likely exhibit different physical conditions for planet formati…
Highly variable AGN from the XMM-Newton slew survey
Read, A. M.; Esquej, P.; Miniutti, G. +4 more
Aims: We investigate the properties of a variability-selected complete sample of active galactic nuclei (AGN) in order to identify the mechanisms which cause large amplitude X-ray variability on timescales of years.
Methods: A complete sample of 24 sources was constructed, from AGN which changed their soft X-ray luminosity by more than o…
A Hard X-Ray Study of the Normal Star-forming Galaxy M83 with NuSTAR
Argo, M. K.; Krivonos, R.; Wik, D. R. +19 more
We present the results from sensitive, multi-epoch NuSTAR observations of the late-type star-forming galaxy M83 (d = 4.6 Mpc). This is the first investigation to spatially resolve the hard (E\gt 10 keV) X-ray emission of this galaxy. The nuclear region and ∼20 off-nuclear point sources, including a previously discovered ultraluminous X-ray source,…
Helical Motions of Fine-structure Prominence Threads Observed by Hinode and IRIS
Liu, Wei; Tsuneta, Saku; Okamoto, Takenori J.
Fine-structure dynamics in solar prominences holds critical clues to understanding their physical nature of significant space-weather implications. We report evidence of rotational motions of horizontal helical threads in two active-region prominences observed by the Hinode and/or Interface Region Imaging Spectrograph satellites at high resolution…
Ceres: Sulfur deposits and graphitized carbon
Vilas, Faith; Li, Jian-Yang; Hendrix, Amanda R.
We report new results from observations of the dwarf planet Ceres using the Hubble Space Telescope in the spectral range 1160-5700 Å. Comparisons between Ceres' UV-visible spectra and laboratory measurements indicate that both sulfur species and graphitized carbon are important on Ceres' surface. We find a latitudinal gradient in UV absorption, wi…
The awakening of the γ-ray narrow-line Seyfert 1 galaxy PKS 1502+036
Pearson, T. J.; Giroletti, M.; Readhead, A. C. S. +7 more
After a long low-activity period, a γ-ray flare from the narrow-line Seyfert 1 PKS 1502+036 (z = 0.4089) was detected by the Large Area Telescope (LAT) on board Fermi in 2015. On 2015 December 20, the source reached a daily peak flux, in the 0.1-300 GeV band, of (93 ± 19) × 10-8 ph cm-2 s-1, attaining a flux of (23…
A Comparison of Global Magnetic Field Skeletons and Active-Region Upflows
Culhane, J. L.; Brooks, D. H.; Harra, L. K. +2 more
Plasma upflows have been detected in active regions using Doppler velocity maps. The origin and nature of these upflows is not well known with many of their characteristics determined from the examination of single events. In particular, some studies suggest these upflows occur along open field lines and, hence, are linked to sources of the solar …