Search Publications
Missions
Journals
Publication Years
Doppler winds mapped around the lower thermospheric terminator of Venus: 2012 solar transit observations from the James Clerk Maxwell Telescope
Clancy, R. Todd; Sandor, Brad J.; Hoge, James
Doppler shifts of sub-millimeter 12 CO (346 GHz) and 13 CO (330 GHz) and millimeter 12 CO (230 GHz) line absorptions were mapped around the circum-disk terminator of Venus before, during, and after the June 5, 2012 solar transit, employing the James Clerk Maxwell Telescope (JCMT). Radiative transfer analysis of the…
Centaurus A: constraints on the nature of the giant lobe filaments from XMM-Newton observations
Croston, Judith H.; Hardcastle, Martin J.; Wykes, Sarka
We report on deep XMM-Newton observations of the vertex filament in the southern giant lobe of the Fanaroff-Riley class I radio galaxy Centaurus A. We find no X-ray excess from the filament region and place a 3σ upper limit on the 1 keV flux density of the filament of 9.6 nJy. This directly constrains the electron density and magnetic field streng…
Star Cluster Disruption in the Starburst Galaxy Messier 82
de Grijs, Richard; Li, Chengyuan; Li, Shuo +1 more
Using high-resolution, multiple-passband Hubble Space Telescope images spanning the entire optical/near-infrared wavelength range, we obtained a statistically complete U-band-selected sample of 846 extended star clusters across the disk of the nearby starburst galaxy M82. Based on a careful analysis of the clusters' spectral energy distributions, …
A Calibration of NICMOS Camera 2 for Low Count Rates
Gladders, M. D.; Lidman, C.; Amanullah, R. +19 more
NICMOS 2 observations are crucial for constraining distances to most of the existing sample of z\gt 1 SNe Ia. Unlike conventional calibration programs, these observations involve long exposure times and low count rates. Reciprocity failure is known to exist in HgCdTe devices and a correction for this effect has already been implemented for high an…
Parallel-dominant and perpendicular-dominant components of the fast bulk flow: Comparing with the PSBL beams
Dunlop, M. W.; Baumjohann, W.; Rème, H. +3 more
Utilizing multipoint observations by the Cluster satellites, we investigated the ion distributions of the fast bulk flows (FBFs) in the plasma sheet. Simultaneous observation by C1 and C3 revealed that parallel-dominant and perpendicular-dominant components of the flows coexist and correspond to Bx-dominant and Bz-dominant ma…
Modelling galaxy spectra in presence of interstellar dust - III. From nearby galaxies to the distant Universe
Cassarà, L. P.; Piovan, L.; Chiosi, C.
Improving upon the standard evolutionary population synthesis technique, we present spectrophotometric models of galaxies with morphology going from spherical structures to discs, properly accounting for the effect of dust in the interstellar medium (ISM). The models contain three main physical components: the diffuse ISM made of gas and dust, the…
An Interpretation of a Possible Mechanism for the First Ground-Level Enhancement of Solar Cycle 24
Gan, W. Q.; Rodríguez-Pacheco, J.; Li, Y. P. +1 more
It is well known that solar flares and shocks driven by coronal mass ejections (CMEs) are high-energy particle acceleration processes that might cause a high-energy particle event known as a ground-level enhancement (GLE). In this context, we have attempted to understand the processes responsible for the first GLE event (GLE71 17 May 2012 01:50 UT…
Study of olivine-rich dark halo crater - Beaumont L in Mare Nectaris using high resolution remote sensing data
Chauhan, Prakash; Rajawat, A. S.; Kumar, A. S. Kiran +1 more
Study of dark-haloed craters (DHCs) can provide important information about the geology, mineralogy and evolution of certain hidden mare deposits known as cryptomare. Some DHCs have been identified in the Mare Nectaris region of the near side of the Moon. Beaumont L represents one such DHC situated on the western flank of the Nectaris basin. Moon …
Thickness of Saturn's B ring as derived from seasonal temperature variations measured by Cassini CIRS
Ferrari, C.; Reffet, E.; Verdier, M.
Structural and thermal properties of Saturn's B ring and its particles are derived from orbital and seasonal temperatures variations observed by the Cassini CIRS spectrometer between 2004 and 2009 equinox. Our multiscale thermal model (Ferrari, C., Reffet, E. [2013]. Icarus 223, 28-39), which assumes negligible heat transfer by vertical motion of …
Environment of the Submillimeter-bright Massive Starburst HFLS3 at z ~ 6.34
Pérez-Fournon, I.; Ivison, R. J.; Clements, D. L. +28 more
We describe the search for Lyman break galaxies (LBGs) near the submillimeter-bright starburst galaxy HFLS3 at z = 6.34 and a study on the environment of this massive galaxy during the end of reionization. We performed two independent selections of LBGs on images obtained with the Gran Telescopio Canarias (GTC) and the Hubble Space Telescope (HST)…