Search Publications
HD 41641: A classical δ Sct-type pulsator with chemical signatures of an Ap star
Ryabchikova, T.; Poretti, E.; Michel, E. +8 more
Context. Among the known groups of pulsating stars, δ Sct stars are one of the least understood. Theoretical models do not predict the oscillation frequencies that observations reveal. Complete asteroseismic studies are necessary to improve these models and better understand the internal structure of these targets.
Aims: We study the δ Sct st…
The bulge-disc decomposition of AGN host galaxies
Dunlop, J. S.; Kocevski, D. D.; Rosario, D. J. +3 more
We present the results from a study of the morphologies of moderate luminosity X-ray-selected active galactic nuclei (AGN) host galaxies in comparison to a carefully mass-matched control sample at 0.5 < z < 3 in the CANDELS GOODS-S field. We apply a multiwavelength morphological decomposition analysis to these two samples and report on the d…
A Stellar Velocity Dispersion for a Strongly-lensed, Intermediate-mass Quiescent Galaxy at z=2.8
Franx, Marijn; Muzzin, Adam; van de Sande, Jesse +1 more
Measuring stellar velocity dispersions of quiescent galaxies beyond z∼ 2 is observationally challenging. Such measurements require near-infrared spectra with a continuum detection of at least moderate signal to noise, often necessitating long integrations. In this paper, we present deep X-Shooter spectroscopy of one of only two known gravitational…
Complex explosive volcanic activity on the Moon within Oppenheimer crater
Bell, James F.; Horgan, Briony H. N.; Hayne, Paul O. +5 more
Oppenheimer crater is a floor-fractured crater located within the South Pole-Aitken basin on the Moon, and exhibits more than a dozen localized pyroclastic deposits associated with the fractures. Localized pyroclastic volcanism on the Moon is thought to form as a result of intermittently explosive Vulcanian eruptions under low effusion rates, in c…
Searching for calcium-aluminum-rich inclusions in cometary particles with Rosetta/COSIMA
Stenzel, Oliver; Kissel, Jochen; Hilchenbach, Martin +2 more
The calcium-aluminum-rich inclusions (CAIs) found in chondritic meteorites are probably the oldest solar system solids, dating back to 4567.30 ± 0.16 million years ago. They are thought to have formed in the protosolar nebula within a few astronomical units of the Sun, and at a temperature of around 1300 K. The Stardust mission found evidence of C…
Constraints on LISA Pathfinder’s self-gravity: design requirements, estimates and testing procedures
Mendes, L.; Madden, S.; Russano, G. +96 more
LISA Pathfinder satellite was launched on 3 December 2015 toward the Sun-Earth first Lagrangian point (L1) where the LISA Technology Package (LTP), which is the main science payload, will be tested. LTP achieves measurements of differential acceleration of free-falling test masses (TMs) with sensitivity below 3× {10}-14 {{m}} {{{s}}}
Phase compensation of MARSIS subsurface sounding data and estimation of ionospheric properties: New insights from SHARAD results
Campbell, Bruce A.; Watters, Thomas R.
Subsurface radar sounding observations by the Mars Advanced Radar for Subsurface and Ionospheric Sounding (MARSIS) and Shallow Radar (SHARAD) instruments are affected by ionospheric phase distortions that lead to image blurring and delay offsets. Based on experience with SHARAD image correction, we propose that ionospheric blurring in MARSIS radar…
Search for gas bulk motions in eight nearby clusters of galaxies with Suzaku
Ota, Naomi; Yoshida, Hiroko
To search for bulk motions of the intracluster medium, we analyzed X-ray spectra taken with the Suzaku satellite, and measured the Doppler shift of the Fe-K line emission from eight nearby clusters of galaxies with various X-ray morphologies. In the cores of the Centaurus and Perseus clusters, the gas bulk velocity does not exceed the sound veloci…
Amazonian-aged fluvial system and associated ice-related features in Terra Cimmeria, Mars
Le Deit, Laetitia; Hauber, Ernst; Jaumann, Ralf +4 more
The Martian climate throughout the Amazonian is widely believed to have been cold and hyper-arid, very similar to the current conditions. However, ubiquitous evidence of aqueous and glacial activity has been recently reported, including channels that can be tens to hundreds of kilometres long, alluvial and fluvial deposits, ice-rich mantles, and g…
The view of AGN-host alignment via reflection spectroscopy
Fabian, Andrew C.; Reynolds, Christopher S.; Middleton, Matthew J. +2 more
The fuelling of active galactic nuclei (AGN) - via material propagated through the galactic disc or via minor mergers - is expected to leave an imprint on the alignment of the sub-pc disc relative to the host galaxy's stellar disc. Determining the inclination of the inner disc usually relies on the launching angle of the jet; here instead we use t…