30,301 research outputs found

    Global helioseismology (WP4.1): From the Sun to the stars & solar analogs

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    Sun-as-a star observations put our star as a reference for stellar observations. Here, I review the activities in which the SPACEINN global seismology team (Working Package WP4.1) has worked during the past 3 years. In particular, we will explain the new deliverables available on the SPACEINN seismic+ portal. Moreover, special attention will be given to surface dynamics (rotation and magnetic fields). After characterizing the rotation and the magnetic properties of around 300 solar-like stars and defining proper metrics for that, we use their seismic properties to characterize 18 solar analogues for which we study their surface magnetic and seismic properties. This allows us to put the Sun into context compared to its siblings.Comment: Proceedings of the SPACEINN/TASC2/KASC9 meeting. 7 pages, 6 figure

    New results at 3PN via an effective field theory of gravity

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    NRGR, an Effective Field Theory approach to gravity, has emerged as a powerful tool to systematically compute higher order corrections in the Post-Newtonian expansion. Here we discuss in somehow more detail the recently reported new results for the spin-spin gravitational potential at third Post-Newtonian order.Comment: 4 pages, talk at the 11th Marcel Grossmann meeting, Berlin, july 200
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