![]() |
![]() |
University of Birmingham > Talks@bham > Astrophysics Talks Series > [Seminar:] Simultaneous radial velocity and magnetic field measurements from intensity spectra
[Seminar:] Simultaneous radial velocity and magnetic field measurements from intensity spectraAdd to your list(s) Download to your calendar using vCal
If you have a question about this talk, please contact Nathan Steinle. During the past decades, the radial velocity (RV) community has made tremendous leaps forward, detecting and characterising ever smaller and lighter exoplanets. This trend has been broken in recent years, as planet-induced RV signals smaller than 1 m/s have turned out to be drowned out by the stars’ activity. The detection of Earth analogues causing an RV effect of about 10 cm/s is therefore currently out of reach. A few avenues are being explored to reinstate the trend in the detection of ever lighter planets. These include improving (1) the instruments, (2) observing strategies, (3) RV extraction techniques, (4) stellar activity monitoring, and (5) stellar activity modelling. In this talk, I will present my contributions to problems (3) and (4). I will outline my new Multi-Mask Least-Squares Deconvolution (MM-LSD) RV extraction pipeline. I will also show how a proxy for stellar magnetic activity-induced RV variations can be extracted from intensity spectra in the visible wavelength range, providing an independent estimate for the evolution of the magnetic field. This talk is part of the Astrophysics Talks Series series. This talk is included in these lists:Note that ex-directory lists are not shown. |
Other listsNanoscale Physics Seminars Human Computer Interaction seminars Virtual Harmonic Analysis SeminarOther talksTBC Hodge Theory: Connecting Algebra and Analysis Geometry of alternating projections in metric spaces with bounded curvature Perfect matchings in random sparsifications of Dirac hypergraphs Quantum simulations using ultra cold ytterbium The development of an optically pumped magnetometer based MEG system |