High Q Cavity Induced Fluxon Bunching in Inductively Coupled Josephson Junctions (2008)
Madsen, Søren, Grønbech-Jensen, Niels, Pedersen, Niels Falsig, Christiansen, Peter L.
We consider fluxon dynamics in a stack of inductively coupled long Josephson junctions connected capacitively to a common resonant cavity at one of the boundaries. We study, through theoretical and...
Radial Velocities Without Spectroscopy (2007)
Søren Madsen, Lennart Lindegren, Dainis Dravins
. We discuss non-spectroscopic (astrometric) ways to determine radial velocities and their potentials in future astrometric missions. Radial-velocity accuracies are presented, based on Hipparcos...
Astrometric versus Spectroscopic Radial Velocities (2007)
Dainis Dravins, Dag Gullberg, Lennart Lindegren, Søren Madsen
The apparent radial velocity of a star, as deduced from wavelength shifts, comprises not merely its true velocity, but also components arising from dynamics in the star's atmosphere,...
Exactly What is Stellar `Radial Velocity'? (2007)
Lennart Lindegren, Dainis Dravins, Søren Madsen
. Accuracy levels of metres per second require the concept of `radial velocity' to be examined, in particular with respect to relativistic velocity effects and spectroscopic measurements made...
Ekberg, Henrik, Kyllonen, Lauri, Madsen, Søren, Grave, Gisle, Solbu, Dag, Holdaas, Hallvard
Abstract is not available
An L-band SAR for repeat pass deformation measurements on a UAV platform (2006)
Hensley, Scott, Lou, Yunling, Rosen, Paul, Wheeler, Kevin, Zebker, Howard, Madsen, Søren, ...
We are proposing to develop a miniaturized polarimetric L-band synthetic aperture radar (SAR) for repeat-pass differential interferometric measurements of deformation for rapidly deforming surfaces...
Repeat Pass Aircraft Interferometry Results at Portage Lake, Maine, and Innisfail, Australia (2004)
Hensley, Scott, Klein, Jeff, Rosen, Paul, Chapin, Elaine, Madsen, Søren, Webb, Frank
The NASA/JPL AIRSAR/TOPSAR instruments have the capability fo collecting fully polarimetric radar data at three wavelengths (C, L and P-Bands) and dual antenna interferometry at C-Band, and more...
Vector Along-Track Interferometry for Ocean Current mapping (2004)
Rodriguez, Ernesto, Imel, David, Madsen, Søren
We examine the feasibility of measuring Along-Track Interferometric (ATI) vector ocean velocities using the azimuth beamwidth of the SAR antenna to obtain angular diversity, at the expense of spatial...
Intrinsic spectral blueshifts in rapidly rotating stars? (2003)
Madsen, Søren, Dravins, Dainis, Ludwig, Hans-Günter, Lindegren, Lennart
Spectroscopic radial velocities for several nearby open clusters suggestthat spectra of (especially earlier-type) rapidly rotating stars aresystematically blueshifted by 3 km s-1 or more, relative...
The internal velocity structure in the Hyades cluster as seen byHipparcos is compared with realistic N-body simulations using the NBODY6code, which includes binary interaction, stellar evolution and...
An N-Body Model of the Hyades (2003)
The three-dimensional structure and kinematics of the Hyades cluster asseen by Hipparcos are compared with realistic N-body simulations usingthe NBODY6 code. Stars are selected from the model in a...
Radial Velocities Without Spectroscopy -Astrometric determination of stellar radial motion (2002)
This work demonstrates the determination of absolute stellar radial velocities from geometrical principles, i.e. using astrometry. Such `astrometric radial velocities' are obtained independently of...
Madsen, Søren, Dravins, Dainis, Lindegren, Lennart
Radial motions of stars in nearby moving clusters are determined fromaccurate proper motions and trigonometric parallaxes, without any use ofspectroscopy. Assuming that cluster members share the same...
Radial velocities without spectroscopy : astrometric determination of stellar radial motion / (2002)
Madsen, Søren., Madsen, S. (Soren)
"Thesis for the degree of Doctor of Philosophy (Avhandling för filosofie doktorexamen), Lund Observatory, 2002.
Jørgensen, Kaj, Povlsen, Johan, Madsen, Søren, Madsen, Melvin, Hansen, Hans, Pedersen, Asger, ...
Background. Recently, 2‐h samples (C2) have been found superior to trough levels for therapeutic monitoring of transplanted patients receiving cyclosporin. The present study was...
Summary in Danish.
Astrometric Radial Velocities From Hipparcos
Dainis Dravins, Lennart Lindegren, Søren Madsen, Johan Holmberg
Space astrometry now permits accurate determinations of stellar radial motion, without using spectroscopy. Using Hipparcos data, this is possible for stars in nearby moving clusters, where all stars...