Search Publications
The supergiant shell with triggered star formation in the dwarf irregular galaxy IC 2574: neutral and ionized gas kinematics
Moiseev, A. V.; Lozinskaya, T. A.; Egorov, O. V. +1 more
We analyse the ionized gas kinematics in the star formation regions of the supergiant shell (SGS) of the IC 2574 galaxy using observations made with the Fabry-Perot interferometer at the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences; the data of the H I Nearby Galaxy Survey (THINGS) are used to analyse t…
New Insights on the Formation and Assembly of M83 from Deep Near-infrared Imaging
Calzetti, Daniela; Chandar, Rupali; Dalcanton, Julianne J. +5 more
We present results from new near-infrared (NIR) imaging from the Spitzer Space Telescope that trace the low surface brightness features of the outer disk and stellar stream in the nearby spiral galaxy, M83. Previous observations have shown that M83 hosts a faint stellar stream to the northwest and a star-forming disk that extends to ~3 times the o…
Spatially Resolved Imaging of the Two-component η Crv Debris Disk with Herschel
Pinte, C.; Duchêne, G.; Clampin, M. +13 more
We present far-infrared and submillimeter images of the η Crv debris disk system obtained with Herschel and SCUBA-2, as well as Hubble Space Telescope visible and near-infrared coronagraphic images. In the 70 µm Herschel image, we clearly separate the thermal emission from the warm and cold belts in the system, find no evidence for a putativ…
Lunar polar craters - Icy, rough or just sloping?
Smith, David; Eke, Vincent R.; Bartram, Sarah A. +2 more
Circular Polarisation Ratio (CPR) mosaics from Mini-SAR on Chandrayaan-1 and Mini-RF on LRO are used to study craters near to the lunar north pole. The look direction of the detectors strongly affects the appearance of the crater CPR maps. Rectifying the mosaics to account for parallax also significantly changes the CPR maps of the crater interior…
Constraining hot plasma in a non-flaring solar active region with FOXSI hard X-ray observations
Krucker, Säm; Shimojo, Masumi; Ishibashi, Kazunori +6 more
We present new constraints on the high-temperature emission measure of a non-flaring solar active region using observations from the recently flown Focusing Optics X-ray Solar Imager (FOXSI) sounding rocket payload. FOXSI has performed the first focused hard X-ray (HXR) observation of the Sun in its first successful flight on 2012 November 2. Focu…
Observational evidence for buffeting-induced kink waves in solar magnetic elements
Berrilli, F.; Consolini, G.; Stangalini, M. +2 more
The role of diffuse photospheric magnetic elements in the energy budget of the upper layers of the Sun's atmosphere has been the recent subject of many studies. This was made possible by the availability of high temporal and spatial resolution observations of the solar photosphere, allowing large numbers of magnetic elements to be tracked to study…
Modelling total solar irradiance since 1878 from simulated magnetograms
Solanki, S. K.; Krivova, N. A.; Jiang, J. +1 more
Aims: We present a new model of total solar irradiance (TSI) based on magnetograms simulated with a surface flux transport model (SFTM) and the Spectral And Total Irradiance REconstructions (SATIRE) model. Our model provides daily maps of the distribution of the photospheric field and the TSI starting from 1878.
Methods: The modelling is…
Hubble Space Telescope Emission Line Galaxies at z ~ 2: The Lyα Escape Fraction
Schneider, Donald P.; Blanc, Guillermo A.; Gronwall, Caryl +8 more
We compare the Hβ line strengths of 1.90 < z < 2.35 star-forming galaxies observed with the near-IR grism of the Hubble Space Telescope with ground-based measurements of Lyα from the HETDEX Pilot Survey and narrow-band imaging. By examining the line ratios of 73 galaxies, we show that most star-forming systems at this epoch have a Lyα escape…
Spectroscopy and detectability of liquid brines on mars
Pommerol, A.; Schmitt, B.; Massé, M. +5 more
Recent geomorphological observations as well as chemical and thermodynamic studies demonstrate that liquid water should be stable today on the Martian surface at some times of the day. In Martian conditions, brines would be particularly more stable than pure water because salts can depress the freezing point and lower the evaporation rate of water…
B fields in OB stars (BOB): The discovery of a magnetic field in a multiple system in the Trifid nebula, one of the youngest star forming regions
Ilyin, I.; Carroll, T. A.; González, J. F. +11 more
Aims: Recent magnetic field surveys in O- and B-type stars revealed that about 10% of the core-hydrogen-burning massive stars host large-scale magnetic fields. The physical origin of these fields is highly debated. To identify and model the physical processes responsible for the generation of magnetic fields in massive stars, it is important …