Title: Limits on the magnetic flux of pre-main-sequence stars
Abstract: view Abstract Citations (148) References (39) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Limits on the Magnetic Flux of Pre--Main-Sequence Stars Basri, Gibor ; Marcy, Geoffrey W. ; Valenti, Jeff A. Abstract Magnetic fields on two weak-emission-line T Tauri stars were detected by searching for the enhancement of the equivalent widths of Zeeman-sensitive absorption lines. For both stars, 26 observed Fe I lines, which represent a wide range of Zeeman sensitivities, are synthesized using an LTE Stokes line-transfer calculation. The theoretical growth of equivalent width with magnetic field is discussed for lines with various Zeeman patterns. Oscillator strengths for all lines are empirically determined a priori using a magnetically quiet star of similar spectral type. The iron abundances of both T Tauri stars are established by synthesizing lines that are insensitive to Zeeman splitting. The observed equivalent widths of Zeeman-sensitive lines in TAP 35 are found to be systematically enhanced relative to those calculated for no magnetic field, while such an enhancement is not seen in Zeeman-insensitive lines. Publication: The Astrophysical Journal Pub Date: May 1992 DOI: 10.1086/171312 Bibcode: 1992ApJ...390..622B Keywords: Magnetic Flux; Pre-Main Sequence Stars; Stellar Magnetic Fields; Stellar Spectra; T Tauri Stars; Absorption Spectra; Line Spectra; Spectral Line Width; Zeeman Effect; Astrophysics; STARS: MAGNETIC FIELDS; STARS: PRE--MAIN-SEQUENCE full text sources ADS | data products SIMBAD (4)