Further evidence for differential rotation in V1057 Cygni

Details Further evidence for differential rotation in V1057 Cygni Further evidence for differential rotation in V1057 Cygni

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...349..328w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 349, Jan. 20, 1990, p. 328-334. Research supported by NSF.

Astronomy and Astrophysics

Astrophysics

12

Accretion Disks, Astronomical Spectroscopy, Stellar Evolution, Stellar Rotation, T Tauri Stars, Cygnus Constellation, H Ii Regions, Spectral Resolution, Stellar Models

Scientific paper

Further tests of the accretion disk hypothesis for FU Orionis objects are presented. High spectral resolution, high signal to noise, 5820-6830 A and 7500-9370 A spectra of V1057 Cyg reveal a correlation between linewidth and line transition lower excitation potential expected from this hypothesis. The magnitude of the effect compares favorably with that predicted by synthetic disk spectra. Additional evidence for previously documented spectral type and linewidth versus wavelength correlations is also presented. This kinematic evidence strongly supports the accretion disk hypothesis.

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