HD 34700 is a T Tauri multiple system

Details HD 34700 is a T Tauri multiple system HD 34700 is a T Tauri multiple system

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26a...434..671s&link_type=abstract

Astronomy and Astrophysics, Volume 434, Issue 2, May I 2005, pp.671-676

Astronomy and Astrophysics

Astrophysics

10

Binaries: Spectroscopic, Stars: Formation, Binaries: Close, Binaries: General, Stars: Pre-Main Sequence

Scientific paper

We have imaged the young double-lined spectroscopic binary HD 34700 in the near-infrared and find evidence for two faint, visual, stellar components at 5.2 Arcsec and 9.2 arcsec distance. High-resolution echelle spectroscopy of both stars shows strong Li I 6708 Å absorption and Hα emission. The spectral types of the companions are estimated from the spectra and photometry as M1-M2 and M2-M3. Their radial velocities are similar to the center-of-mass velocity of the central SB2; hence all four stars are most probably physically bound and constitute a young quadruple stellar system with an inner short-period binary. We provide a list of pre-main sequence spectroscopic binaries with additional components of which HD 34700 is yet another example. The available statistics strengthen the suspicion that dynamical effects in multiple systems play a key role in the formation of very close binaries early in their evolution.

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