High spectral resolution infrared observations of V1057 Cygni

Details High spectral resolution infrared observations of V1057 Cygni High spectral resolution infrared observations of V1057 Cygni

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...322..393h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 322, Nov. 1, 1987, p. 393-398.

Astronomy and Astrophysics

Astronomy

53

Accretion Disks, Infrared Astronomy, Pre-Main Sequence Stars, Stellar Models, Stellar Spectra, Near Infrared Radiation, Radial Velocity, Stellar Evolution, Stellar Mass Accretion, Stellar Mass Ejection

Scientific paper

The authors report high-resolution near-infrared spectra which confirm a key prediction of their accretion disk model for V1057 Cygni. In this model, the outbursts of V1057 Cyg and other FU Ori objects are caused by rapid accretion from a circumstellar disk nebula onto a pre-main-sequence star. Infrared spectra obtained with the KPNO 4 m FTS show that V1057 Cygni does rotate more slowly at 2.3 μm than at 6000 Å, by an amount quantitatively consistent with the simple disk models. The absence of any radial velocity variations in either the infrared or optical spectral regions make it very unlikely that the accretion disk is fed by a companion star but support the view that the accreted material arises from a remnant disk of protostellar material.

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