Astrophysics and Astronomy Commons^™

He I Λ10830 As A Probe Of Winds In Accreting Young Stars, Suzan Edwards, William Fischer, John Kwan, L. Hillenbrand, Andrea K. Dupree

Astronomy: Faculty Publications

He I 10830 profiles acquired with Keck's NIRSPEC for six young low-mass stars with high disk accretion rates (AS 353A, DG Tau, DL Tau, DR Tau, HL Tau, and SVS 13) provide new insight into accretion-driven winds. In four of the stars, the profiles have the signature of resonance scattering, and they possess a deep and broad blueshifted absorption that penetrates more than 50% into the 1 m continuum over a continuous range of velocities from near the stellar rest velocity to the terminal velocity of the wind, unlike inner wind signatures seen in other spectral features. This deep and …