Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011hsa6.conf..540m&link_type=abstract
Highlights of Spanish Astrophysics VI, Proceedings of the IX Scientific Meeting of the Spanish Astronomical Society (SEA), held
Astronomy and Astrophysics
Astrophysics
Scientific paper
Herbig Ae stars are early-type pre-main sequence objects with circumstellar (CS) accreting disks, possible progenitors of debris disks around Vega-like stars. The CS gas dissipation, which put constraints on the giant planet formation time-scale, is mainly controlled by accretion. According to the magnetospheric accretion paradigm, matter is channelled through magnetic field lines connecting the inner disk and the stellar surface. Although models using that scenario have been successfully applied to the lower-mass T-Tauri stars, it is not clear whether they work also for Herbig Ae objects. Our aim is to explore this possibility combining modeled and observational data. Using input parameters typically characterizing Herbig Ae stars, as well as 4 magnetospheric sizes x 4 orders of magnitude in the accretion rate x 2 gas temperature profiles x 5 inclinations to the line of sight, we made a grid of 480 synthetic Halpha and Na I D (5890-5895 A) line profiles. This poster describes the grid and summarizes the results obtained up to date, from the comparison between synthetic and observed line profiles.
Eiroa Carlos
Mendigutía I.
Montesinos Benjamin
Mora Alcione
Muzerolle James
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