{"id":38,"date":"2017-08-21T10:32:36","date_gmt":"2017-08-21T10:32:36","guid":{"rendered":"https:\/\/escience.aip.de\/iau30-fm4\/?page_id=38"},"modified":"2017-08-29T10:07:49","modified_gmt":"2017-08-29T10:07:49","slug":"topics","status":"publish","type":"page","link":"https:\/\/escience.aip.de\/iau30-fm4\/topics\/","title":{"rendered":"Topics"},"content":{"rendered":"<h4>Key topics<\/h4>\n<ul>\n<li>Polarimetric observations as a tracer of the magnetic fields across the scales and physical environments relevant to the star formation sequence.<\/li>\n<li>Observations of magnetic fields in filaments, star-forming cores, and protostars: polarized (sub-)millimeter emission from dust and molecules (linear and circular polarization from the Goldreich-Kylafis and Zeeman effects, respectively).<\/li>\n<li>Polarization of protoplanetary disks and young stars from polarized infrared emission,<br \/>\nscattered light, and spectropolarimetry.<\/li>\n<li>Testing solutions to the angular momentum problem and magnetic flux problem in star formation thanks to observations of magnetic and velocity fields (magnetized accretion\/ejection, magnetic flux dissipation)<\/li>\n<\/ul>\n<h4>Key questions<\/h4>\n<ul>\n<li>Do polarization observations (via thermal dust continuum emission, star-light absorption, and spectral-lines features) currently allow to establish a global view of the role and evolution of the magnetic field during the star formation sequence ? If not, identify remaining challenges to do so.<\/li>\n<li>Can we develop new statistical tools (and test them with MHD simulations) to infer magnetic-field strengths and topologies from polarization data?<\/li>\n<li>Do different indirect tracers (polarized dust emission, polarization of background starlight, and polarization from spectral lines) trace similar magnetic topologies and strengths?<\/li>\n<li>Are magnetic fields important to remove angular momentum during the star-formation processes, in a time sequence from prestellar cores to pre-main-sequence stars, and contribute to solve the angular momentum problem for star formation?<\/li>\n<li>Do we have mechanisms for removing magnetic flux during the star formation processes, so as to reconcile the magnetic fluxes observed in stars with the magnetic fields observed in star-forming cores (i.e., solving the \u201cmagnetic flux problem\u201d)?<\/li>\n<li>What novel instrumental and observational techniques can we identify, and how are they relevant to answering key questions across communities?<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Key topics Polarimetric observations as a tracer of the magnetic fields across the scales and physical environments relevant to the star formation sequence. Observations of magnetic fields in filaments, star-forming cores, and protostars: polarized (sub-)millimeter emission from dust and molecules (linear and circular polarization from the Goldreich-Kylafis and Zeeman effects, respectively). Polarization of protoplanetary disks &hellip; <a href=\"https:\/\/escience.aip.de\/iau30-fm4\/topics\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Topics&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"https:\/\/escience.aip.de\/iau30-fm4\/wp-json\/wp\/v2\/pages\/38"}],"collection":[{"href":"https:\/\/escience.aip.de\/iau30-fm4\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/escience.aip.de\/iau30-fm4\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/escience.aip.de\/iau30-fm4\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/escience.aip.de\/iau30-fm4\/wp-json\/wp\/v2\/comments?post=38"}],"version-history":[{"count":2,"href":"https:\/\/escience.aip.de\/iau30-fm4\/wp-json\/wp\/v2\/pages\/38\/revisions"}],"predecessor-version":[{"id":86,"href":"https:\/\/escience.aip.de\/iau30-fm4\/wp-json\/wp\/v2\/pages\/38\/revisions\/86"}],"wp:attachment":[{"href":"https:\/\/escience.aip.de\/iau30-fm4\/wp-json\/wp\/v2\/media?parent=38"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}