Search Publications
Asymmetry of magnetosheath flows and magnetopause shape during low Alfvén Mach number solar wind
Budnik, E.; Dandouras, I.; Lavraud, B. +11 more
works have emphasized the significant influence of the solar wind Alfvén Mach number (MA) on magnetospheric dynamics. Here we report statistical, observational results that pertain to changes in the magnetosheath flow distribution and magnetopause shape as a function of solar wind MA and interplanetary magnetic field (IMF) cl…
Confirmation of Small Dynamical and Stellar Masses for Extreme Emission Line Galaxies at z ~ 2
Bell, Eric F.; Grogin, Norman A.; Kocevski, Dale D. +21 more
Spectroscopic observations from the Large Binocular Telescope and the Very Large Telescope reveal kinematically narrow lines (~50 km s-1) for a sample of 14 extreme emission line galaxies at redshifts 1.4 < z < 2.3. These measurements imply that the total dynamical masses of these systems are low (lsim 3 × 109 M ⊙<…
High-rigidity Forbush decreases: due to CMEs or shocks?
Antia, H. M.; Subramanian, P.; Hayashi, Y. +7 more
Aims: We seek to identify the primary agents causing Forbush decreases (FDs) in high-rigidity cosmic rays observed from the Earth. In particular, we ask if these FDs are caused mainly by coronal mass ejections (CMEs) from the Sun that are directed towards the Earth, or by their associated shocks.
Methods: We used the muon data at cutoff …
Modeling the HD 32297 Debris Disk with Far-infrared Herschel Data
Krivov, A. V.; Augereau, J. -C.; Lebreton, J. +2 more
HD 32297 is a young A-star (~30 Myr) 112 pc away with a bright edge-on debris disk that has been resolved in scattered light. We observed the HD 32297 debris disk in the far-infrared and sub-millimeter with the Herschel Space Observatory PACS and SPIRE instruments, populating the spectral energy distribution (SED) from 63 to 500 µm. We aimed…
The Herschel DIGIT Survey of Weak-line T Tauri Stars: Implications for Disk Evolution and Dissipation
Henning, Thomas; Güdel, Manuel; Pinte, Christophe +8 more
As part of the "Dust, Ice, and Gas In Time (DIGIT)" Herschel Open Time Key Program, we present Herschel photometry (at 70, 160, 250, 350, and 500 µm) of 31 weak-line T Tauri star (WTTS) candidates in order to investigate the evolutionary status of their circumstellar disks. Of the stars in our sample, 13 had circumstellar disks previously kn…
Connections between spectra and structure in Saturn’s main rings based on Cassini VIMS data
Clark, R. N.; Nicholson, P. D.; Hedman, M. M. +4 more
Saturn’s main rings exhibit variations in both their opacity and their spectral properties on a broad range of spatial scales, and the correlations between these parameters can provide insights into the processes that shape the composition and dynamics of the rings. The Visual and Infrared Mapping Spectrometer (VIMS) instrument onboard the Cassini…
Integrated spectroscopy of the Herschel Reference Survey. The spectral line properties of a volume-limited, K-band-selected sample of nearby galaxies
Buat, V.; Boselli, A.; Cortese, L. +2 more
We present long-slit integrated spectroscopy of 238 late-type galaxies belonging to the Herschel Reference Survey, a volume-limited sample representative of the nearby universe. This sample has a unique legacy value since it was ideally defined for any statistical study of the multifrequency properties of galaxies spanning a wide range in morpholo…
High-resolution Study of the Cluster Complexes in a Lensed Spiral at Redshift 1.5: Constraints on the Bulge Formation and Disk Evolution
Östlin, G.; Bastian, N.; Zackrisson, E. +3 more
We analyze the clump population of the spiral galaxy Sp 1149 at redshift 1.5. Located behind the galaxy cluster MACS J1149.5+2223, Sp 1149 has been significantly magnified allowing us to study the galaxy on physical scales down to ~100 pc. The galaxy cluster frame is among the targets of the Cluster Lensing And Supernova survey with Hubble (CLASH)…
The processing of electron density profiles from the Mars Express MARSIS topside sounder
Gurnett, D. A.; Morgan, D. D.; Witasse, O. +3 more
here present a manual for the reduction of data from ionograms obtained from the Mars Express MARSIS Active Ionospheric Sounding topside radar sounder. Sample data are presented with the procedure for processing them explained as simply as possible. We discuss the uncertainties inherent in the measurements as well as systematic problems with the d…
Uncertainties in water chemistry in disks: An application to TW Hydrae
Pinte, C.; Dent, W. R. F.; Woitke, P. +7 more
Context. This paper discusses the sensitivity of water lines to chemical processes and radiative transfer for the protoplanetary disk around TW Hya. The study focuses on the Herschel spectral range in the context of new line detections with the PACS instrument from the Gas in Protoplanetary Systems project (GASPS).
Aims: The paper presents an…